Logging

OpenShift Container Platform 4.16

Configuring and using logging in OpenShift Container Platform

Red Hat OpenShift Documentation Team

Abstract

Use logging to collect, visualize, forward, and store log data to troubleshoot issues, identify performance bottlenecks, and detect security threats in OpenShift Container Platform.

Chapter 1. Release notes

1.1. Logging 5.9

Logging is provided as an installable component, with a distinct release cycle from the core OpenShift Container Platform. The Red Hat OpenShift Container Platform Life Cycle Policy outlines release compatibility.

Note

The stable channel only provides updates to the most recent release of logging. To continue receiving updates for prior releases, you must change your subscription channel to stable-x.y, where x.y represents the major and minor version of logging you have installed. For example, stable-5.7.

1.1.1. Logging 5.9.9

This release includes RHBA-2024:10049.

1.1.1.1. Bug fixes

Before this update, upgrades to version 6.0 failed with errors if a Log File Metric Exporter instance was present. This update fixes the issue, enabling upgrades to proceed smoothly without errors. (LOG-6201)
Before this update, Loki did not correctly load some configurations, which caused issues when using Alibaba Cloud or IBM Cloud object storage. This update fixes the configuration-loading code in Loki, resolving the issue. (LOG-6293)

1.1.1.2. CVEs

CVE-2024-6119

1.1.2. Logging 5.9.8

This release includes OpenShift Logging Bug Fix Release 5.9.8.

1.1.2.1. Bug fixes

Before this update, the Loki Operator failed to add the default namespace label to all AlertingRule resources, which caused the User-Workload-Monitoring Alertmanager to skip routing these alerts. This update adds the rule namespace as a label to all alerting and recording rules, resolving the issue and restoring proper alert routing in Alertmanager. (LOG-6181)
Before this update, the LokiStack ruler component view did not initialize properly, causing an invalid field error when the ruler component was disabled. This update ensures that the component view initializes with an empty value, resolving the issue. (LOG-6183)
Before this update, an LF character in the vector.toml file under the ES authentication configuration caused the collector pods to crash. This update removes the newline characters from the username and password fields, resolving the issue. (LOG-6206)
Before this update, it was possible to set the .containerLimit.maxRecordsPerSecond parameter in the ClusterLogForwarder custom resource to 0, which could lead to an exception during Vector’s startup. With this update, the configuration is validated before being applied, and any invalid values (less than or equal to zero) are rejected. (LOG-6214)

1.1.2.2. CVEs

1.1.3. Logging 5.9.7

This release includes OpenShift Logging Bug Fix Release 5.9.7.

1.1.3.1. Bug fixes

Before this update, the clusterlogforwarder.spec.outputs.http.timeout parameter was not applied to the Fluentd configuration when Fluentd was used as the collector type, causing HTTP timeouts to be misconfigured. With this update, the clusterlogforwarder.spec.outputs.http.timeout parameter is now correctly applied, ensuring Fluentd honors the specified timeout and handles HTTP connections according to the user’s configuration. (LOG-6125)
Before this update, the TLS section was added without verifying the broker URL schema, resulting in SSL connection errors if the URLs did not start with tls. With this update, the TLS section is now added only if the broker URLs start with tls, preventing SSL connection errors. (LOG-6041)

1.1.3.2. CVEs

Note

For detailed information on Red Hat security ratings, review Severity ratings.

1.1.4. Logging 5.9.6

This release includes OpenShift Logging Bug Fix Release 5.9.6.

1.1.4.1. Bug fixes

Before this update, the collector deployment ignored secret changes, causing receivers to reject logs. With this update, the system rolls out a new pod when there is a change in the secret value, ensuring that the collector reloads the updated secrets. (LOG-5525)
Before this update, the Vector could not correctly parse field values that included a single dollar sign ($). With this update, field values with a single dollar sign are automatically changed to two dollar signs ($$), ensuring proper parsing by the Vector. (LOG-5602)
Before this update, the drop filter could not handle non-string values (e.g., .responseStatus.code: 403). With this update, the drop filter now works properly with these values. (LOG-5815)
Before this update, the collector used the default settings to collect audit logs, without handling the backload from output receivers. With this update, the process for collecting audit logs has been improved to better manage file handling and log reading efficiency. (LOG-5866)
Before this update, the must-gather tool failed on clusters with non-AMD64 architectures such as Azure Resource Manager (ARM) or PowerPC. With this update, the tool now detects the cluster architecture at runtime and uses architecture-independent paths and dependencies. The detection allows must-gather to run smoothly on platforms like ARM and PowerPC. (LOG-5997)
Before this update, the log level was set using a mix of structured and unstructured keywords that were unclear. With this update, the log level follows a clear, documented order, starting with structured keywords. (LOG-6016)
Before this update, multiple unnamed pipelines writing to the default output in the ClusterLogForwarder caused a validation error due to duplicate auto-generated names. With this update, the pipeline names are now generated without duplicates. (LOG-6033)
Before this update, the collector pods did not have the PreferredScheduling annotation. With this update, the PreferredScheduling annotation is added to the collector daemonset. (LOG-6023)

1.1.4.2. CVEs

1.1.5. Logging 5.9.5

This release includes OpenShift Logging Bug Fix Release 5.9.5

1.1.5.1. Bug Fixes

Before this update, duplicate conditions in the LokiStack resource status led to invalid metrics from the Loki Operator. With this update, the Operator removes duplicate conditions from the status. (LOG-5855)
Before this update, the Loki Operator did not trigger alerts when it dropped log events due to validation failures. With this update, the Loki Operator includes a new alert definition that triggers an alert if Loki drops log events due to validation failures. (LOG-5895)
Before this update, the Loki Operator overwrote user annotations on the LokiStack Route resource, causing customizations to drop. With this update, the Loki Operator no longer overwrites Route annotations, fixing the issue. (LOG-5945)

1.1.5.2. CVEs

None.

1.1.6. Logging 5.9.4

This release includes OpenShift Logging Bug Fix Release 5.9.4

1.1.6.1. Bug Fixes

Before this update, an incorrectly formatted timeout configuration caused the OCP plugin to crash. With this update, a validation prevents the crash and informs the user about the incorrect configuration. (LOG-5373)
Before this update, workloads with labels containing - caused an error in the collector when normalizing log entries. With this update, the configuration change ensures the collector uses the correct syntax. (LOG-5524)
Before this update, an issue prevented selecting pods that no longer existed, even if they had generated logs. With this update, this issue has been fixed, allowing selection of such pods. (LOG-5697)
Before this update, the Loki Operator would crash if the CredentialRequest specification was registered in an environment without the cloud-credentials-operator. With this update, the CredentialRequest specification only registers in environments that are cloud-credentials-operator enabled. (LOG-5701)
Before this update, the Logging Operator watched and processed all config maps across the cluster. With this update, the dashboard controller only watches the config map for the logging dashboard. (LOG-5702)
Before this update, the ClusterLogForwarder introduced an extra space in the message payload which did not follow the RFC3164 specification. With this update, the extra space has been removed, fixing the issue. (LOG-5707)
Before this update, removing the seeding for grafana-dashboard-cluster-logging as a part of (LOG-5308) broke new greenfield deployments without dashboards. With this update, the Logging Operator seeds the dashboard at the beginning and continues to update it for changes. (LOG-5747)
Before this update, LokiStack was missing a route for the Volume API causing the following error: 404 not found. With this update, LokiStack exposes the Volume API, resolving the issue. (LOG-5749)

1.1.6.2. CVEs

CVE-2024-24790

1.1.7. Logging 5.9.3

This release includes OpenShift Logging Bug Fix Release 5.9.3

1.1.7.1. Bug Fixes

Before this update, there was a delay in restarting Ingesters when configuring LokiStack, because the Loki Operator sets the write-ahead log replay_memory_ceiling to zero bytes for the 1x.demo size. With this update, the minimum value used for the replay_memory_ceiling has been increased to avoid delays. (LOG-5614)
Before this update, monitoring the Vector collector output buffer state was not possible. With this update, monitoring and alerting the Vector collector output buffer size is possible that improves observability capabilities and helps keep the system running optimally. (LOG-5586)

1.1.7.2. CVEs

1.1.8. Logging 5.9.2

This release includes OpenShift Logging Bug Fix Release 5.9.2

1.1.8.1. Bug Fixes

Before this update, changes to the Logging Operator caused an error due to an incorrect configuration in the ClusterLogForwarder CR. As a result, upgrades to logging deleted the daemonset collector. With this update, the Logging Operator re-creates collector daemonsets except when a Not authorized to collect error occurs. (LOG-4910)
Before this update, the rotated infrastructure log files were sent to the application index in some scenarios due to an incorrect configuration in the Vector log collector. With this update, the Vector log collector configuration avoids collecting any rotated infrastructure log files. (LOG-5156)
Before this update, the Logging Operator did not monitor changes to the grafana-dashboard-cluster-logging config map. With this update, the Logging Operator monitors changes in the ConfigMap objects, ensuring the system stays synchronized and responds effectively to config map modifications. (LOG-5308)
Before this update, an issue in the metrics collection code of the Logging Operator caused it to report stale telemetry metrics. With this update, the Logging Operator does not report stale telemetry metrics. (LOG-5426)
Before this change, the Fluentd out_http plugin ignored the no_proxy environment variable. With this update, the Fluentd patches the HTTP#start method of ruby to honor the no_proxy environment variable. (LOG-5466)

1.1.8.2. CVEs

1.1.9. Logging 5.9.1

This release includes OpenShift Logging Bug Fix Release 5.9.1

1.1.9.1. Enhancements

Before this update, the Loki Operator configured Loki to use path-based style access for the Amazon Simple Storage Service (S3), which has been deprecated. With this update, the Loki Operator defaults to virtual-host style without users needing to change their configuration. (LOG-5401)
Before this update, the Loki Operator did not validate the Amazon Simple Storage Service (S3) endpoint used in the storage secret. With this update, the validation process ensures the S3 endpoint is a valid S3 URL, and the LokiStack status updates to indicate any invalid URLs. (LOG-5395)

1.1.9.2. Bug Fixes

Before this update, a bug in LogQL parsing left out some line filters from the query. With this update, the parsing now includes all the line filters while keeping the original query unchanged. (LOG-5268)
Before this update, a prune filter without a defined pruneFilterSpec would cause a segfault. With this update, there is a validation error if a prune filter is without a defined puneFilterSpec. (LOG-5322)
Before this update, a drop filter without a defined dropTestsSpec would cause a segfault. With this update, there is a validation error if a prune filter is without a defined puneFilterSpec. (LOG-5323)
Before this update, the Loki Operator did not validate the Amazon Simple Storage Service (S3) endpoint URL format used in the storage secret. With this update, the S3 endpoint URL goes through a validation step that reflects on the status of the LokiStack. (LOG-5397)
Before this update, poorly formatted timestamp fields in audit log records led to WARN messages in Red Hat OpenShift Logging Operator logs. With this update, a remap transformation ensures that the timestamp field is properly formatted. (LOG-4672)
Before this update, the error message thrown while validating a ClusterLogForwarder resource name and namespace did not correspond to the correct error. With this update, the system checks if a ClusterLogForwarder resource with the same name exists in the same namespace. If not, it corresponds to the correct error. (LOG-5062)
Before this update, the validation feature for output config required a TLS URL, even for services such as Amazon CloudWatch or Google Cloud Logging where a URL is not needed by design. With this update, the validation logic for services without URLs are improved, and the error message are more informative. (LOG-5307)
Before this update, defining an infrastructure input type did not exclude logging workloads from the collection. With this update, the collection excludes logging services to avoid feedback loops. (LOG-5309)

1.1.9.3. CVEs

No CVEs.

1.1.10. Logging 5.9.0

This release includes OpenShift Logging Bug Fix Release 5.9.0

1.1.10.1. Removal notice

The Logging 5.9 release does not contain an updated version of the OpenShift Elasticsearch Operator. Instances of OpenShift Elasticsearch Operator from prior logging releases, remain supported until the EOL of the logging release. As an alternative to using the OpenShift Elasticsearch Operator to manage the default log storage, you can use the Loki Operator. For more information on the Logging lifecycle dates, see Platform Agnostic Operators.

1.1.10.2. Deprecation notice

In Logging 5.9, Fluentd, and Kibana are deprecated and are planned to be removed in Logging 6.0, which is expected to be shipped alongside a future release of OpenShift Container Platform. Red Hat will provide critical and above CVE bug fixes and support for these components during the current release lifecycle, but these components will no longer receive feature enhancements. The Vector-based collector provided by the Red Hat OpenShift Logging Operator and LokiStack provided by the Loki Operator are the preferred Operators for log collection and storage. We encourage all users to adopt the Vector and Loki log stack, as this will be the stack that will be enhanced going forward.
In Logging 5.9, the Fields option for the Splunk output type was never implemented and is now deprecated. It will be removed in a future release.

1.1.10.3. Enhancements

1.1.10.3.1. Log Collection

This enhancement adds the ability to refine the process of log collection by using a workload’s metadata to drop or prune logs based on their content. Additionally, it allows the collection of infrastructure logs, such as journal or container logs, and audit logs, such as kube api or ovn logs, to only collect individual sources. (LOG-2155)
This enhancement introduces a new type of remote log receiver, the syslog receiver. You can configure it to expose a port over a network, allowing external systems to send syslog logs using compatible tools such as rsyslog. (LOG-3527)
With this update, the ClusterLogForwarder API now supports log forwarding to Azure Monitor Logs, giving users better monitoring abilities. This feature helps users to maintain optimal system performance and streamline the log analysis processes in Azure Monitor, which speeds up issue resolution and improves operational efficiency. (LOG-4605)
This enhancement improves collector resource utilization by deploying collectors as a deployment with two replicas. This occurs when the only input source defined in the ClusterLogForwarder custom resource (CR) is a receiver input instead of using a daemon set on all nodes. Additionally, collectors deployed in this manner do not mount the host file system. To use this enhancement, you need to annotate the ClusterLogForwarder CR with the logging.openshift.io/dev-preview-enable-collector-as-deployment annotation. (LOG-4779)
This enhancement introduces the capability for custom tenant configuration across all supported outputs, facilitating the organization of log records in a logical manner. However, it does not permit custom tenant configuration for logging managed storage. (LOG-4843)
With this update, the ClusterLogForwarder CR that specifies an application input with one or more infrastructure namespaces like default, openshift*, or kube*, now requires a service account with the collect-infrastructure-logs role. (LOG-4943)
This enhancement introduces the capability for tuning some output settings, such as compression, retry duration, and maximum payloads, to match the characteristics of the receiver. Additionally, this feature includes a delivery mode to allow administrators to choose between throughput and log durability. For example, the AtLeastOnce option configures minimal disk buffering of collected logs so that the collector can deliver those logs after a restart. (LOG-5026)
This enhancement adds three new Prometheus alerts, warning users about the deprecation of Elasticsearch, Fluentd, and Kibana. (LOG-5055)

1.1.10.3.2. Log Storage

This enhancement in LokiStack improves support for OTEL by using the new V13 object storage format and enabling automatic stream sharding by default. This also prepares the collector for future enhancements and configurations. (LOG-4538)
This enhancement introduces support for short-lived token workload identity federation with Azure and AWS log stores for STS enabled OpenShift Container Platform 4.14 and later clusters. Local storage requires the addition of a CredentialMode: static annotation under spec.storage.secret in the LokiStack CR. (LOG-4540)
With this update, the validation of the Azure storage secret is now extended to give early warning for certain error conditions. (LOG-4571)
With this update, Loki now adds upstream and downstream support for GCP workload identity federation mechanism. This allows authenticated and authorized access to the corresponding object storage services. (LOG-4754)

1.1.10.4. Bug Fixes

Before this update, the logging must-gather could not collect any logs on a FIPS-enabled cluster. With this update, a new oc client is available in cluster-logging-rhel9-operator, and must-gather works properly on FIPS clusters. (LOG-4403)
Before this update, the LokiStack ruler pods could not format the IPv6 pod IP in HTTP URLs used for cross-pod communication. This issue caused querying rules and alerts through the Prometheus-compatible API to fail. With this update, the LokiStack ruler pods encapsulate the IPv6 pod IP in square brackets, resolving the problem. Now, querying rules and alerts through the Prometheus-compatible API works just like in IPv4 environments. (LOG-4709)
Before this fix, the YAML content from the logging must-gather was exported in a single line, making it unreadable. With this update, the YAML white spaces are preserved, ensuring that the file is properly formatted. (LOG-4792)
Before this update, when the ClusterLogForwarder CR was enabled, the Red Hat OpenShift Logging Operator could run into a nil pointer exception when ClusterLogging.Spec.Collection was nil. With this update, the issue is now resolved in the Red Hat OpenShift Logging Operator. (LOG-5006)
Before this update, in specific corner cases, replacing the ClusterLogForwarder CR status field caused the resourceVersion to constantly update due to changing timestamps in Status conditions. This condition led to an infinite reconciliation loop. With this update, all status conditions synchronize, so that timestamps remain unchanged if conditions stay the same. (LOG-5007)
Before this update, there was an internal buffering behavior to drop_newest to address high memory consumption by the collector resulting in significant log loss. With this update, the behavior reverts to using the collector defaults. (LOG-5123)
Before this update, the Loki Operator ServiceMonitor in the openshift-operators-redhat namespace used static token and CA files for authentication, causing errors in the Prometheus Operator in the User Workload Monitoring spec on the ServiceMonitor configuration. With this update, the Loki Operator ServiceMonitor in openshift-operators-redhat namespace now references a service account token secret by a LocalReference object. This approach allows the User Workload Monitoring spec in the Prometheus Operator to handle the Loki Operator ServiceMonitor successfully, enabling Prometheus to scrape the Loki Operator metrics. (LOG-5165)
Before this update, the configuration of the Loki Operator ServiceMonitor could match many Kubernetes services, resulting in the Loki Operator metrics being collected multiple times. With this update, the configuration of ServiceMonitor now only matches the dedicated metrics service. (LOG-5212)

1.1.10.5. Known Issues

None.

1.1.10.6. CVEs

Chapter 2. Logging 6.0

2.1. Release notes

2.1.1. Logging 6.0.2

This release includes RHBA-2024:10051.

2.1.1.1. Bug fixes

Before this update, Loki did not correctly load some configurations, which caused issues when using Alibaba Cloud or IBM Cloud object storage. This update fixes the configuration-loading code in Loki, resolving the issue. (LOG-5325)
Before this update, the collector would discard audit log messages that exceeded the configured threshold. This modifies the audit configuration thresholds for the maximum line size as well as the number of bytes read during a read cycle. (LOG-5998)
Before this update, the Cluster Logging Operator did not watch and reconcile resources associated with an instance of a ClusterLogForwarder like it did in prior releases. This update modifies the operator to watch and reconcile all resources it owns and creates. (LOG-6264)
Before this update, log events with an unknown severity level sent to Google Cloud Logging would trigger a warning in the vector collector, which would then default the severity to 'DEFAULT'. With this update, log severity levels are now standardized to match Google Cloud Logging specifications, and audit logs are assigned a severity of 'INFO'. (LOG-6296)
Before this update, when infrastructure namespaces were included in application inputs, the log_type was set as application. With this update, the log_type of infrastructure namespaces included in application inputs is set to infrastructure. (LOG-6354)
Before this update, specifying a value for the syslog.enrichment field of the ClusterLogForwarder added namespace_name, container_name, and pod_name to the messages of non-container logs. With this update, only container logs include namespace_name, container_name, and pod_name in their messages when syslog.enrichment is set. (LOG-6402)

2.1.1.2. CVEs

2.1.2. Logging 6.0.1

This release includes OpenShift Logging Bug Fix Release 6.0.1.

2.1.2.1. Bug fixes

With this update, the default memory limit for the collector has been increased from 1024 Mi to 2024 Mi. However, users should always adjust their resource limits according to their cluster specifications and needs. (LOG-6180)
Before this update, the Loki Operator failed to add the default namespace label to all AlertingRule resources, which caused the User-Workload-Monitoring Alertmanager to skip routing these alerts. This update adds the rule namespace as a label to all alerting and recording rules, resolving the issue and restoring proper alert routing in Alertmanager. (LOG-6151)
Before this update, the LokiStack ruler component view did not initialize properly, causing an invalid field error when the ruler component was disabled. This update ensures that the component view initializes with an empty value, resolving the issue. (LOG-6129)
Before this update, it was possible to set log_source in the prune filter, which could lead to inconsistent log data. With this update, the configuration is validated before being applied, and any configuration that includes log_source in the prune filter is rejected. (LOG-6202)

2.1.2.2. CVEs

2.1.3. Logging 6.0.0

This release includes Logging for Red Hat OpenShift Bug Fix Release 6.0.0

Note

Table 2.1. Upstream component versions
logging Version	Component Version
Operator	`eventrouter`	`logfilemetricexporter`	`loki`	`lokistack-gateway`	`opa-openshift`	`vector`
6.0	0.4	1.1	3.1.0	0.1	0.1	0.37.1

2.1.4. Removal notice

With this release, logging no longer supports the ClusterLogging.logging.openshift.io and ClusterLogForwarder.logging.openshift.io custom resources. Refer to the product documentation for details on the replacement features. (LOG-5803)
With this release, logging no longer manages or deploys log storage (such as Elasticsearch), visualization (such as Kibana), or Fluentd-based log collectors. (LOG-5368)

Note

In order to continue to use Elasticsearch and Kibana managed by the elasticsearch-operator, the administrator must modify those object’s ownerRefs before deleting the ClusterLogging resource.

2.1.5. New features and enhancements

This feature introduces a new architecture for logging for Red Hat OpenShift by shifting component responsibilities to their relevant Operators, such as for storage, visualization, and collection. It introduces the ClusterLogForwarder.observability.openshift.io API for log collection and forwarding. Support for the ClusterLogging.logging.openshift.io and ClusterLogForwarder.logging.openshift.io APIs, along with the Red Hat managed Elastic stack (Elasticsearch and Kibana), is removed. Users are encouraged to migrate to the Red Hat LokiStack for log storage. Existing managed Elasticsearch deployments can be used for a limited time. Automated migration for log collection is not provided, so administrators need to create a new ClusterLogForwarder.observability.openshift.io specification to replace their previous custom resources. Refer to the official product documentation for more details. (LOG-3493)
With this release, the responsibility for deploying the logging view plugin shifts from the Red Hat OpenShift Logging Operator to the Cluster Observability Operator (COO). For new log storage installations that need visualization, the Cluster Observability Operator and the associated UIPlugin resource must be deployed. Refer to the Cluster Observability Operator Overview product documentation for more details. (LOG-5461)
This enhancement sets default requests and limits for Vector collector deployments' memory and CPU usage based on Vector documentation recommendations. (LOG-4745)
This enhancement updates Vector to align with the upstream version v0.37.1. (LOG-5296)
This enhancement introduces an alert that triggers when log collectors buffer logs to a node’s file system and use over 15% of the available space, indicating potential back pressure issues. (LOG-5381)
This enhancement updates the selectors for all components to use common Kubernetes labels. (LOG-5906)
This enhancement changes the collector configuration to deploy as a ConfigMap instead of a secret, allowing users to view and edit the configuration when the ClusterLogForwarder is set to Unmanaged. (LOG-5599)
This enhancement adds the ability to configure the Vector collector log level using an annotation on the ClusterLogForwarder, with options including trace, debug, info, warn, error, or off. (LOG-5372)
This enhancement adds validation to reject configurations where Amazon CloudWatch outputs use multiple AWS roles, preventing incorrect log routing. (LOG-5640)
This enhancement removes the Log Bytes Collected and Log Bytes Sent graphs from the metrics dashboard. (LOG-5964)
This enhancement updates the must-gather functionality to only capture information for inspecting Logging 6.0 components, including Vector deployments from ClusterLogForwarder.observability.openshift.io resources and the Red Hat managed LokiStack. (LOG-5949)
This enhancement improves Azure storage secret validation by providing early warnings for specific error conditions. (LOG-4571)

2.1.6. Technology Preview features

This release introduces a Technology Preview feature for log forwarding using OpenTelemetry. A new output type,` OTLP`, allows sending JSON-encoded log records using the OpenTelemetry data model and resource semantic conventions. (LOG-4225)

2.1.7. Bug fixes

Before this update, the CollectorHighErrorRate and CollectorVeryHighErrorRate alerts were still present. With this update, both alerts are removed in the logging 6.0 release but might return in a future release. (LOG-3432)

2.1.8. CVEs

CVE-2024-34397

2.2. Logging 6.0

The ClusterLogForwarder custom resource (CR) is the central configuration point for log collection and forwarding.

2.2.1. Inputs and Outputs

Inputs specify the sources of logs to be forwarded. Logging provides built-in input types: application, infrastructure, and audit, which select logs from different parts of your cluster. You can also define custom inputs based on namespaces or pod labels to fine-tune log selection.

Outputs define the destinations where logs are sent. Each output type has its own set of configuration options, allowing you to customize the behavior and authentication settings.

2.2.2. Receiver Input Type

The receiver input type enables the Logging system to accept logs from external sources. It supports two formats for receiving logs: http and syslog.

The ReceiverSpec defines the configuration for a receiver input.

2.2.3. Pipelines and Filters

Pipelines determine the flow of logs from inputs to outputs. A pipeline consists of one or more input refs, output refs, and optional filter refs. Filters can be used to transform or drop log messages within a pipeline. The order of filters matters, as they are applied sequentially, and earlier filters can prevent log messages from reaching later stages.

2.2.4. Operator Behavior

The Cluster Logging Operator manages the deployment and configuration of the collector based on the managementState field:

When set to Managed (default), the operator actively manages the logging resources to match the configuration defined in the spec.
When set to Unmanaged, the operator does not take any action, allowing you to manually manage the logging components.

2.2.5. Validation

Logging includes extensive validation rules and default values to ensure a smooth and error-free configuration experience. The ClusterLogForwarder resource enforces validation checks on required fields, dependencies between fields, and the format of input values. Default values are provided for certain fields, reducing the need for explicit configuration in common scenarios.

2.2.5.1. Quick Start

Prerequisites

Cluster administrator permissions

Procedure

Install the OpenShift Logging and Loki Operators from OperatorHub.

Create a LokiStack custom resource (CR) in the openshift-logging namespace:

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  managementState: Managed
  size: 1x.extra-small
  storage:
    schemas:
    - effectiveDate: '2022-06-01'
      version: v13
    secret:
      name: logging-loki-s3
      type: s3
    storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

Create a service account for the collector:

$ oc create sa collector -n openshift-logging

Create a ClusterRole for the collector:

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: logging-collector-logs-writer
rules:
- apiGroups:
  - loki.grafana.com
  resourceNames:
  - logs
  resources:
  - application
  - audit
  - infrastructure
  verbs:
  - create

Bind the ClusterRole to the service account:

$ oc adm policy add-cluster-role-to-user logging-collector-logs-writer -z collector

Install the Cluster Observability Operator.

Create a UIPlugin to enable the Log section in the Observe tab:

apiVersion: observability.openshift.io/v1alpha1
kind: UIPlugin
metadata:
  name: logging
spec:
  type: Logging
  logging:
    lokiStack:
      name: logging-loki

Add additional roles to the collector service account:

$ oc project openshift-logging
$ oc adm policy add-cluster-role-to-user collect-application-logs -z collector
$ oc adm policy add-cluster-role-to-user collect-audit-logs -z collector
$ oc adm policy add-cluster-role-to-user collect-infrastructure-logs -z collector

Create a ClusterLogForwarder CR to configure log forwarding:

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: collector
  namespace: openshift-logging
spec:
  serviceAccount:
    name: collector
  outputs:
  - name: default-lokistack
    type: lokiStack
    lokiStack:
      target:
        name: logging-loki
        namespace: openshift-logging
      authentication:
        token:
          from: serviceAccount
    tls:
      ca:
        key: service-ca.crt
        configMapName: openshift-service-ca.crt
  pipelines:
  - name: default-logstore
    inputRefs:
    - application
    - infrastructure
    outputRefs:
    - default-lokistack

Verify that logs are visible in the Log section of the Observe tab in the OpenShift web console.

2.3. Upgrading to Logging 6.0

Logging v6.0 is a significant upgrade from previous releases, achieving several longstanding goals of Cluster Logging:

Introduction of distinct operators to manage logging components (e.g., collectors, storage, visualization).
Removal of support for managed log storage and visualization based on Elastic products (i.e., Elasticsearch, Kibana).
Deprecation of the Fluentd log collector implementation.
Removal of support for ClusterLogging.logging.openshift.io and ClusterLogForwarder.logging.openshift.io resources.

Note

The cluster-logging-operator does not provide an automated upgrade process.

Given the various configurations for log collection, forwarding, and storage, no automated upgrade is provided by the cluster-logging-operator. This documentation assists administrators in converting existing ClusterLogging.logging.openshift.io and ClusterLogForwarder.logging.openshift.io specifications to the new API. Examples of migrated ClusterLogForwarder.observability.openshift.io resources for common use cases are included.

2.3.1. Using the `oc explain` command

The oc explain command is an essential tool in the OpenShift CLI oc that provides detailed descriptions of the fields within Custom Resources (CRs). This command is invaluable for administrators and developers who are configuring or troubleshooting resources in an OpenShift cluster.

2.3.1.1. Resource Descriptions

oc explain offers in-depth explanations of all fields associated with a specific object. This includes standard resources like pods and services, as well as more complex entities like statefulsets and custom resources defined by Operators.

To view the documentation for the outputs field of the ClusterLogForwarder custom resource, you can use:

$ oc explain clusterlogforwarders.observability.openshift.io.spec.outputs

Note

In place of clusterlogforwarder the short form obsclf can be used.

This will display detailed information about these fields, including their types, default values, and any associated sub-fields.

2.3.1.2. Hierarchical Structure

The command displays the structure of resource fields in a hierarchical format, clarifying the relationships between different configuration options.

For instance, here’s how you can drill down into the storage configuration for a LokiStack custom resource:

$ oc explain lokistacks.loki.grafana.com
$ oc explain lokistacks.loki.grafana.com.spec
$ oc explain lokistacks.loki.grafana.com.spec.storage
$ oc explain lokistacks.loki.grafana.com.spec.storage.schemas

Each command reveals a deeper level of the resource specification, making the structure clear.

2.3.1.3. Type Information

oc explain also indicates the type of each field (such as string, integer, or boolean), allowing you to verify that resource definitions use the correct data types.

For example:

$ oc explain lokistacks.loki.grafana.com.spec.size

This will show that size should be defined using an integer value.

2.3.1.4. Default Values

When applicable, the command shows the default values for fields, providing insights into what values will be used if none are explicitly specified.

Again using lokistacks.loki.grafana.com as an example:

$ oc explain lokistacks.spec.template.distributor.replicas

Example output

GROUP:      loki.grafana.com
KIND:       LokiStack
VERSION:    v1

FIELD: replicas <integer>

DESCRIPTION:
    Replicas defines the number of replica pods of the component.

2.3.2. Log Storage

The only managed log storage solution available in this release is a Lokistack, managed by the loki-operator. This solution, previously available as the preferred alternative to the managed Elasticsearch offering, remains unchanged in its deployment process.

Important

To continue using an existing Red Hat managed Elasticsearch or Kibana deployment provided by the elasticsearch-operator, remove the owner references from the Elasticsearch resource named elasticsearch, and the Kibana resource named kibana in the openshift-logging namespace before removing the ClusterLogging resource named instance in the same namespace.

Temporarily set ClusterLogging to state Unmanaged

$ oc -n openshift-logging patch clusterlogging/instance -p '{"spec":{"managementState": "Unmanaged"}}' --type=merge

Remove ClusterLogging ownerReferences from the Elasticsearch resource
The following command ensures that ClusterLogging no longer owns the Elasticsearch resource. Updates to the ClusterLogging resource’s logStore field will no longer affect the Elasticsearch resource.
```
$ oc -n openshift-logging patch elasticsearch/elasticsearch -p '{"metadata":{"ownerReferences": []}}' --type=merge
```
Remove ClusterLogging ownerReferences from the Kibana resource
The following command ensures that ClusterLogging no longer owns the Kibana resource. Updates to the ClusterLogging resource’s visualization field will no longer affect the Kibana resource.
```
$ oc -n openshift-logging patch kibana/kibana -p '{"metadata":{"ownerReferences": []}}' --type=merge
```
Set ClusterLogging to state Managed

$ oc -n openshift-logging patch clusterlogging/instance -p '{"spec":{"managementState": "Managed"}}' --type=merge

2.3.3. Log Visualization

The OpenShift console UI plugin for log visualization has been moved to the cluster-observability-operator from the cluster-logging-operator.

2.3.4. Log Collection and Forwarding

Log collection and forwarding configurations are now specified under the new API, part of the observability.openshift.io API group. The following sections highlight the differences from the old API resources.

Note

Vector is the only supported collector implementation.

2.3.5. Management, Resource Allocation, and Workload Scheduling

Configuration for management state (e.g., Managed, Unmanaged), resource requests and limits, tolerations, and node selection is now part of the new ClusterLogForwarder API.

Previous Configuration

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
spec:
  managementState: "Managed"
  collection:
    resources:
      limits: {}
      requests: {}
    nodeSelector: {}
    tolerations: {}

Current Configuration

apiVersion: "observability.openshift.io/v1"
kind: ClusterLogForwarder
spec:
  managementState: Managed
  collector:
    resources:
      limits: {}
      requests: {}
    nodeSelector: {}
    tolerations: {}

2.3.6. Input Specifications

The input specification is an optional part of the ClusterLogForwarder specification. Administrators can continue to use the predefined values of application, infrastructure, and audit to collect these sources.

2.3.6.1. Application Inputs

Namespace and container inclusions and exclusions have been consolidated into a single field.

5.9 Application Input with Namespace and Container Includes and Excludes

apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
spec:
  inputs:
   - name: application-logs
     type: application
     application:
       namespaces:
       - foo
       - bar
       includes:
       - namespace: my-important
         container: main
       excludes:
       - container: too-verbose

6.0 Application Input with Namespace and Container Includes and Excludes

apiVersion: "observability.openshift.io/v1"
kind: ClusterLogForwarder
spec:
  inputs:
   - name: application-logs
     type: application
     application:
       includes:
       - namespace: foo
       - namespace: bar
       - namespace: my-important
         container: main
       excludes:
       - container: too-verbose

Note

application, infrastructure, and audit are reserved words and cannot be used as names when defining an input.

2.3.6.2. Input Receivers

Changes to input receivers include:

Explicit configuration of the type at the receiver level.
Port settings moved to the receiver level.

5.9 Input Receivers

apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
spec:
  inputs:
  - name: an-http
    receiver:
      http:
        port: 8443
        format: kubeAPIAudit
  - name: a-syslog
    receiver:
      type: syslog
      syslog:
        port: 9442

6.0 Input Receivers

apiVersion: "observability.openshift.io/v1"
kind: ClusterLogForwarder
spec:
  inputs:
  - name: an-http
    type: receiver
    receiver:
      type: http
      port: 8443
      http:
        format: kubeAPIAudit
  - name: a-syslog
    type: receiver
    receiver:
      type: syslog
      port: 9442

2.3.7. Output Specifications

High-level changes to output specifications include:

URL settings moved to each output type specification.
Tuning parameters moved to each output type specification.
Separation of TLS configuration from authentication.
Explicit configuration of keys and secret/configmap for TLS and authentication.

2.3.8. Secrets and TLS Configuration

Secrets and TLS configurations are now separated into authentication and TLS configuration for each output. They must be explicitly defined in the specification rather than relying on administrators to define secrets with recognized keys. Upgrading TLS and authorization configurations requires administrators to understand previously recognized keys to continue using existing secrets. Examples in the following sections provide details on how to configure ClusterLogForwarder secrets to forward to existing Red Hat managed log storage solutions.

2.3.9. Red Hat Managed Elasticsearch

v5.9 Forwarding to Red Hat Managed Elasticsearch

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance
  namespace: openshift-logging
spec:
  logStore:
    type: elasticsearch

v6.0 Forwarding to Red Hat Managed Elasticsearch

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
  - name: default-elasticsearch
    type: elasticsearch
    elasticsearch:
      url: https://elasticsearch:9200
      version: 6
      index: <log_type>-write-{+yyyy.MM.dd}
    tls:
      ca:
        key: ca-bundle.crt
        secretName: collector
      certificate:
        key: tls.crt
        secretName: collector
      key:
        key: tls.key
        secretName: collector
  pipelines:
  - outputRefs:
    - default-elasticsearch
  - inputRefs:
    - application
    - infrastructure

Note

In this example, application logs are written to the application-write alias/index instead of app-write.

2.3.10. Red Hat Managed LokiStack

v5.9 Forwarding to Red Hat Managed LokiStack

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance
  namespace: openshift-logging
spec:
  logStore:
    type: lokistack
    lokistack:
      name: lokistack-dev

v6.0 Forwarding to Red Hat Managed LokiStack

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
  - name: default-lokistack
    type: lokiStack
    lokiStack:
      target:
        name: lokistack-dev
        namespace: openshift-logging
      authentication:
        token:
          from: serviceAccount
    tls:
      ca:
        key: service-ca.crt
        configMapName: openshift-service-ca.crt
  pipelines:
  - outputRefs:
    - default-lokistack
  - inputRefs:
    - application
    - infrastructure

2.3.11. Filters and Pipeline Configuration

Pipeline configurations now define only the routing of input sources to their output destinations, with any required transformations configured separately as filters. All attributes of pipelines from previous releases have been converted to filters in this release. Individual filters are defined in the filters specification and referenced by a pipeline.

5.9 Filters

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
spec:
  pipelines:
   - name: application-logs
     parse: json
     labels:
       foo: bar
     detectMultilineErrors: true

6.0 Filter Configuration

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
spec:
  filters:
  - name: detectexception
    type: detectMultilineException
  - name: parse-json
    type: parse
  - name: labels
    type: openshiftLabels
    openshiftLabels:
      foo: bar
  pipelines:
  - name: application-logs
    filterRefs:
    - detectexception
    - labels
    - parse-json

2.3.12. Validation and Status

Most validations are enforced when a resource is created or updated, providing immediate feedback. This is a departure from previous releases, where validation occurred post-creation and required inspecting the resource status. Some validation still occurs post-creation for cases where it is not possible to validate at creation or update time.

Instances of the ClusterLogForwarder.observability.openshift.io must satisfy the following conditions before the operator will deploy the log collector: Authorized, Valid, Ready. An example of these conditions is:

6.0 Status Conditions

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
status:
  conditions:
  - lastTransitionTime: "2024-09-13T03:28:44Z"
    message: 'permitted to collect log types: [application]'
    reason: ClusterRolesExist
    status: "True"
    type: observability.openshift.io/Authorized
  - lastTransitionTime: "2024-09-13T12:16:45Z"
    message: ""
    reason: ValidationSuccess
    status: "True"
    type: observability.openshift.io/Valid
  - lastTransitionTime: "2024-09-13T12:16:45Z"
    message: ""
    reason: ReconciliationComplete
    status: "True"
    type: Ready
  filterConditions:
  - lastTransitionTime: "2024-09-13T13:02:59Z"
    message: filter "detectexception" is valid
    reason: ValidationSuccess
    status: "True"
    type: observability.openshift.io/ValidFilter-detectexception
  - lastTransitionTime: "2024-09-13T13:02:59Z"
    message: filter "parse-json" is valid
    reason: ValidationSuccess
    status: "True"
    type: observability.openshift.io/ValidFilter-parse-json
  inputConditions:
  - lastTransitionTime: "2024-09-13T12:23:03Z"
    message: input "application1" is valid
    reason: ValidationSuccess
    status: "True"
    type: observability.openshift.io/ValidInput-application1
  outputConditions:
  - lastTransitionTime: "2024-09-13T13:02:59Z"
    message: output "default-lokistack-application1" is valid
    reason: ValidationSuccess
    status: "True"
    type: observability.openshift.io/ValidOutput-default-lokistack-application1
  pipelineConditions:
  - lastTransitionTime: "2024-09-13T03:28:44Z"
    message: pipeline "default-before" is valid
    reason: ValidationSuccess
    status: "True"
    type: observability.openshift.io/ValidPipeline-default-before

Note

Conditions that are satisfied and applicable have a "status" value of "True". Conditions with a status other than "True" provide a reason and a message explaining the issue.

2.4. Configuring log forwarding

The ClusterLogForwarder (CLF) allows users to configure forwarding of logs to various destinations. It provides a flexible way to select log messages from different sources, send them through a pipeline that can transform or filter them, and forward them to one or more outputs.

Key Functions of the ClusterLogForwarder

Selects log messages using inputs
Forwards logs to external destinations using outputs
Filters, transforms, and drops log messages using filters
Defines log forwarding pipelines connecting inputs, filters and outputs

2.4.1. Setting up log collection

This release of Cluster Logging requires administrators to explicitly grant log collection permissions to the service account associated with ClusterLogForwarder. This was not required in previous releases for the legacy logging scenario consisting of a ClusterLogging and, optionally, a ClusterLogForwarder.logging.openshift.io resource.

The Red Hat OpenShift Logging Operator provides collect-audit-logs, collect-application-logs, and collect-infrastructure-logs cluster roles, which enable the collector to collect audit logs, application logs, and infrastructure logs respectively.

Setup log collection by binding the required cluster roles to your service account.

2.4.1.1. Legacy service accounts

To use the existing legacy service account logcollector, create the following ClusterRoleBinding:

$ oc adm policy add-cluster-role-to-user collect-application-logs system:serviceaccount:openshift-logging:logcollector
$ oc adm policy add-cluster-role-to-user collect-infrastructure-logs system:serviceaccount:openshift-logging:logcollector

Additionally, create the following ClusterRoleBinding if collecting audit logs:

$ oc adm policy add-cluster-role-to-user collect-audit-logs system:serviceaccount:openshift-logging:logcollector

2.4.1.2. Creating service accounts

Prerequisites

The Red Hat OpenShift Logging Operator is installed in the openshift-logging namespace.
You have administrator permissions.

Procedure

Create a service account for the collector. If you want to write logs to storage that requires a token for authentication, you must include a token in the service account.

Bind the appropriate cluster roles to the service account:

Example binding command

$ oc adm policy add-cluster-role-to-user <cluster_role_name> system:serviceaccount:<namespace_name>:<service_account_name>

2.4.1.2.1. Cluster Role Binding for your Service Account

The role_binding.yaml file binds the ClusterLogging operator’s ClusterRole to a specific ServiceAccount, allowing it to manage Kubernetes resources cluster-wide.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: manager-rolebinding
roleRef:                                           1
  apiGroup: rbac.authorization.k8s.io              2
  kind: ClusterRole                                3
  name: cluster-logging-operator                   4
subjects:                                          5
  - kind: ServiceAccount                           6
    name: cluster-logging-operator                 7
    namespace: openshift-logging                   8

1: roleRef: References the ClusterRole to which the binding applies.
2: apiGroup: Indicates the RBAC API group, specifying that the ClusterRole is part of Kubernetes' RBAC system.
3: kind: Specifies that the referenced role is a ClusterRole, which applies cluster-wide.
4: name: The name of the ClusterRole being bound to the ServiceAccount, here cluster-logging-operator.
5: subjects: Defines the entities (users or service accounts) that are being granted the permissions from the ClusterRole.
6: kind: Specifies that the subject is a ServiceAccount.
7: Name: The name of the ServiceAccount being granted the permissions.
8: namespace: Indicates the namespace where the ServiceAccount is located.

2.4.1.2.2. Writing application logs

The write-application-logs-clusterrole.yaml file defines a ClusterRole that grants permissions to write application logs to the Loki logging application.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-logging-write-application-logs
rules:                                              1
  - apiGroups:                                      2
      - loki.grafana.com                            3
    resources:                                      4
      - application                                 5
    resourceNames:                                  6
      - logs                                        7
    verbs:                                          8
      - create                                      9
Annotations
<1> rules: Specifies the permissions granted by this ClusterRole.
<2> apiGroups: Refers to the API group loki.grafana.com, which relates to the Loki logging system.
<3> loki.grafana.com: The API group for managing Loki-related resources.
<4> resources: The resource type that the ClusterRole grants permission to interact with.
<5> application: Refers to the application resources within the Loki logging system.
<6> resourceNames: Specifies the names of resources that this role can manage.
<7> logs: Refers to the log resources that can be created.
<8> verbs: The actions allowed on the resources.
<9> create: Grants permission to create new logs in the Loki system.

2.4.1.2.3. Writing audit logs

The write-audit-logs-clusterrole.yaml file defines a ClusterRole that grants permissions to create audit logs in the Loki logging system.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-logging-write-audit-logs
rules:                                              1
  - apiGroups:                                      2
      - loki.grafana.com                            3
    resources:                                      4
      - audit                                       5
    resourceNames:                                  6
      - logs                                        7
    verbs:                                          8
      - create                                      9

1 1: rules: Defines the permissions granted by this ClusterRole.
2 2: apiGroups: Specifies the API group loki.grafana.com.
3 3: loki.grafana.com: The API group responsible for Loki logging resources.
4 4: resources: Refers to the resource type this role manages, in this case, audit.
5 5: audit: Specifies that the role manages audit logs within Loki.
6 6: resourceNames: Defines the specific resources that the role can access.
7 7: logs: Refers to the logs that can be managed under this role.
8 8: verbs: The actions allowed on the resources.
9 9: create: Grants permission to create new audit logs.

2.4.1.2.4. Writing infrastructure logs

The write-infrastructure-logs-clusterrole.yaml file defines a ClusterRole that grants permission to create infrastructure logs in the Loki logging system.

Sample YAML

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-logging-write-infrastructure-logs
rules:                                              1
  - apiGroups:                                      2
      - loki.grafana.com                            3
    resources:                                      4
      - infrastructure                              5
    resourceNames:                                  6
      - logs                                        7
    verbs:                                          8
      - create                                      9

1: rules: Specifies the permissions this ClusterRole grants.
2: apiGroups: Specifies the API group for Loki-related resources.
3: loki.grafana.com: The API group managing the Loki logging system.
4: resources: Defines the resource type that this role can interact with.
5: infrastructure: Refers to infrastructure-related resources that this role manages.
6: resourceNames: Specifies the names of resources this role can manage.
7: logs: Refers to the log resources related to infrastructure.
8: verbs: The actions permitted by this role.
9: create: Grants permission to create infrastructure logs in the Loki system.

2.4.1.2.5. ClusterLogForwarder editor role

The clusterlogforwarder-editor-role.yaml file defines a ClusterRole that allows users to manage ClusterLogForwarders in OpenShift.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: clusterlogforwarder-editor-role
rules:                                              1
  - apiGroups:                                      2
      - observability.openshift.io                  3
    resources:                                      4
      - clusterlogforwarders                        5
    verbs:                                          6
      - create                                      7
      - delete                                      8
      - get                                         9
      - list                                        10
      - patch                                       11
      - update                                      12
      - watch                                       13

1: rules: Specifies the permissions this ClusterRole grants.
2: apiGroups: Refers to the OpenShift-specific API group
3: obervability.openshift.io: The API group for managing observability resources, like logging.
4: resources: Specifies the resources this role can manage.
5: clusterlogforwarders: Refers to the log forwarding resources in OpenShift.
6: verbs: Specifies the actions allowed on the ClusterLogForwarders.
7: create: Grants permission to create new ClusterLogForwarders.
8: delete: Grants permission to delete existing ClusterLogForwarders.
9: get: Grants permission to retrieve information about specific ClusterLogForwarders.
10: list: Allows listing all ClusterLogForwarders.
11: patch: Grants permission to partially modify ClusterLogForwarders.
12: update: Grants permission to update existing ClusterLogForwarders.
13: watch: Grants permission to monitor changes to ClusterLogForwarders.

2.4.2. Modifying log level in collector

To modify the log level in the collector, you can set the observability.openshift.io/log-level annotation to trace, debug, info, warn, error, and off.

Example log level annotation

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: collector
  annotations:
    observability.openshift.io/log-level: debug
# ...

2.4.3. Managing the Operator

The ClusterLogForwarder resource has a managementState field that controls whether the operator actively manages its resources or leaves them Unmanaged:

Managed: (default) The operator will drive the logging resources to match the desired state in the CLF spec.
Unmanaged: The operator will not take any action related to the logging components.

This allows administrators to temporarily pause log forwarding by setting managementState to Unmanaged.

2.4.4. Structure of the ClusterLogForwarder

The CLF has a spec section that contains the following key components:

Inputs: Select log messages to be forwarded. Built-in input types application, infrastructure and audit forward logs from different parts of the cluster. You can also define custom inputs.
Outputs: Define destinations to forward logs to. Each output has a unique name and type-specific configuration.
Pipelines: Define the path logs take from inputs, through filters, to outputs. Pipelines have a unique name and consist of a list of input, output and filter names.
Filters: Transform or drop log messages in the pipeline. Users can define filters that match certain log fields and drop or modify the messages. Filters are applied in the order specified in the pipeline.

2.4.4.1. Inputs

Inputs are configured in an array under spec.inputs. There are three built-in input types:

application: Selects logs from all application containers, excluding those in infrastructure namespaces such as default, openshift, or any namespace with the kube- or openshift- prefix.
infrastructure: Selects logs from infrastructure components running in default and openshift namespaces and node logs.
audit: Selects logs from the OpenShift API server audit logs, Kubernetes API server audit logs, ovn audit logs, and node audit logs from auditd.

Users can define custom inputs of type application that select logs from specific namespaces or using pod labels.

2.4.4.2. Outputs

Outputs are configured in an array under spec.outputs. Each output must have a unique name and a type. Supported types are:

azureMonitor: Forwards logs to Azure Monitor.
cloudwatch: Forwards logs to AWS CloudWatch.
elasticsearch: Forwards logs to an external Elasticsearch instance.
googleCloudLogging: Forwards logs to Google Cloud Logging.
http: Forwards logs to a generic HTTP endpoint.
kafka: Forwards logs to a Kafka broker.
loki: Forwards logs to a Loki logging backend.
lokistack: Forwards logs to the logging supported combination of Loki and web proxy with OpenShift Container Platform authentication integration. LokiStack’s proxy uses OpenShift Container Platform authentication to enforce multi-tenancy
otlp: Forwards logs using the OpenTelemetry Protocol.
splunk: Forwards logs to Splunk.
syslog: Forwards logs to an external syslog server.

Each output type has its own configuration fields.

2.4.4.3. Pipelines

Pipelines are configured in an array under spec.pipelines. Each pipeline must have a unique name and consists of:

inputRefs: Names of inputs whose logs should be forwarded to this pipeline.
outputRefs: Names of outputs to send logs to.
filterRefs: (optional) Names of filters to apply.

The order of filterRefs matters, as they are applied sequentially. Earlier filters can drop messages that will not be processed by later filters.

2.4.4.4. Filters

Filters are configured in an array under spec.filters. They can match incoming log messages based on the value of structured fields and modify or drop them.

Administrators can configure the following types of filters:

2.4.4.5. Enabling multi-line exception detection

Enables multi-line error detection of container logs.

Warning

Enabling this feature could have performance implications and may require additional computing resources or alternate logging solutions.

Log parsers often incorrectly identify separate lines of the same exception as separate exceptions. This leads to extra log entries and an incomplete or inaccurate view of the traced information.

Example java exception

java.lang.NullPointerException: Cannot invoke "String.toString()" because "<param1>" is null
    at testjava.Main.handle(Main.java:47)
    at testjava.Main.printMe(Main.java:19)
    at testjava.Main.main(Main.java:10)

To enable logging to detect multi-line exceptions and reassemble them into a single log entry, ensure that the ClusterLogForwarder Custom Resource (CR) contains a detectMultilineErrors field under the .spec.filters.

Example ClusterLogForwarder CR

apiVersion: "observability.openshift.io/v1"
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name>
  namespace: <log_forwarder_namespace>
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: <name>
    type: detectMultilineException
  pipelines:
    - inputRefs:
        - <input-name>
      name: <pipeline-name>
      filterRefs:
        - <filter-name>
      outputRefs:
        - <output-name>

2.4.4.5.1. Details

When log messages appear as a consecutive sequence forming an exception stack trace, they are combined into a single, unified log record. The first log message’s content is replaced with the concatenated content of all the message fields in the sequence.

The collector supports the following languages:

Java
JS
Ruby
Python
Golang
PHP
Dart

2.4.4.6. Configuring content filters to drop unwanted log records

When the drop filter is configured, the log collector evaluates log streams according to the filters before forwarding. The collector drops unwanted log records that match the specified configuration.

Procedure

Add a configuration for a filter to the filters spec in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to drop log records based on regular expressions:
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: <filter_name>
    type: drop 1
    drop: 2
    - test: 3
      - field: .kubernetes.labels."foo-bar/baz" 4
        matches: .+ 5
      - field: .kubernetes.pod_name
        notMatches: "my-pod" 6
  pipelines:
  - name: <pipeline_name> 7
    filterRefs: ["<filter_name>"]
# ...
```
1
Specifies the type of filter. The drop filter drops log records that match the filter configuration.
2
Specifies configuration options for applying the drop filter.
3
Specifies the configuration for tests that are used to evaluate whether a log record is dropped.
If all the conditions specified for a test are true, the test passes and the log record is dropped.
When multiple tests are specified for the drop filter configuration, if any of the tests pass, the record is dropped.
If there is an error evaluating a condition, for example, the field is missing from the log record being evaluated, that condition evaluates to false.
4
Specifies a dot-delimited field path, which is a path to a field in the log record. The path can contain alpha-numeric characters and underscores (a-zA-Z0-9_), for example, .kubernetes.namespace_name. If segments contain characters outside of this range, the segment must be in quotes, for example, .kubernetes.labels."foo.bar-bar/baz". You can include multiple field paths in a single test configuration, but they must all evaluate to true for the test to pass and the drop filter to be applied.
5
Specifies a regular expression. If log records match this regular expression, they are dropped. You can set either the matches or notMatches condition for a single field path, but not both.
6
Specifies a regular expression. If log records do not match this regular expression, they are dropped. You can set either the matches or notMatches condition for a single field path, but not both.
7
Specifies the pipeline that the drop filter is applied to.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

Additional examples

The following additional example shows how you can configure the drop filter to only keep higher priority log records:

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: important
    type: drop
    drop:
    - test:
      - field: .message
        notMatches: "(?i)critical|error"
      - field: .level
        matches: "info|warning"
# ...

In addition to including multiple field paths in a single test configuration, you can also include additional tests that are treated as OR checks. In the following example, records are dropped if either test configuration evaluates to true. However, for the second test configuration, both field specs must be true for it to be evaluated to true:

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: important
    type: drop
    drop:
    - test:
      - field: .kubernetes.namespace_name
        matches: "^open"
    - test:
      - field: .log_type
        matches: "application"
      - field: .kubernetes.pod_name
        notMatches: "my-pod"
# ...

2.4.4.7. Overview of API audit filter

OpenShift API servers generate audit events for each API call, detailing the request, response, and the identity of the requester, leading to large volumes of data. The API Audit filter uses rules to enable the exclusion of non-essential events and the reduction of event size, facilitating a more manageable audit trail. Rules are checked in order, and checking stops at the first match. The amount of data that is included in an event is determined by the value of the level field:

None: The event is dropped.
Metadata: Audit metadata is included, request and response bodies are removed.
Request: Audit metadata and the request body are included, the response body is removed.
RequestResponse: All data is included: metadata, request body and response body. The response body can be very large. For example, oc get pods -A generates a response body containing the YAML description of every pod in the cluster.

The ClusterLogForwarder custom resource (CR) uses the same format as the standard Kubernetes audit policy, while providing the following additional functions:

Wildcards

Names of users, groups, namespaces, and resources can have a leading or trailing * asterisk character. For example, the namespace openshift-\* matches openshift-apiserver or openshift-authentication. Resource \*/status matches Pod/status or Deployment/status.

Default Rules

Events that do not match any rule in the policy are filtered as follows:

Read-only system events such as get, list, and watch are dropped.
Service account write events that occur within the same namespace as the service account are dropped.
All other events are forwarded, subject to any configured rate limits.

To disable these defaults, either end your rules list with a rule that has only a level field or add an empty rule.

Omit Response Codes: A list of integer status codes to omit. You can drop events based on the HTTP status code in the response by using the OmitResponseCodes field, which lists HTTP status codes for which no events are created. The default value is [404, 409, 422, 429]. If the value is an empty list, [], then no status codes are omitted.

The ClusterLogForwarder CR audit policy acts in addition to the OpenShift Container Platform audit policy. The ClusterLogForwarder CR audit filter changes what the log collector forwards and provides the ability to filter by verb, user, group, namespace, or resource. You can create multiple filters to send different summaries of the same audit stream to different places. For example, you can send a detailed stream to the local cluster log store and a less detailed stream to a remote site.

Note

You must have a cluster role collect-audit-logs to collect the audit logs. The following example provided is intended to illustrate the range of rules possible in an audit policy and is not a recommended configuration.

Example audit policy

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name>
  namespace: <log_forwarder_namespace>
spec:
  serviceAccount:
    name: <service_account_name>
  pipelines:
    - name: my-pipeline
      inputRefs: audit 1
      filterRefs: my-policy 2
  filters:
    - name: my-policy
      type: kubeAPIAudit
      kubeAPIAudit:
        # Don't generate audit events for all requests in RequestReceived stage.
        omitStages:
          - "RequestReceived"

        rules:
          # Log pod changes at RequestResponse level
          - level: RequestResponse
            resources:
            - group: ""
              resources: ["pods"]

          # Log "pods/log", "pods/status" at Metadata level
          - level: Metadata
            resources:
            - group: ""
              resources: ["pods/log", "pods/status"]

          # Don't log requests to a configmap called "controller-leader"
          - level: None
            resources:
            - group: ""
              resources: ["configmaps"]
              resourceNames: ["controller-leader"]

          # Don't log watch requests by the "system:kube-proxy" on endpoints or services
          - level: None
            users: ["system:kube-proxy"]
            verbs: ["watch"]
            resources:
            - group: "" # core API group
              resources: ["endpoints", "services"]

          # Don't log authenticated requests to certain non-resource URL paths.
          - level: None
            userGroups: ["system:authenticated"]
            nonResourceURLs:
            - "/api*" # Wildcard matching.
            - "/version"

          # Log the request body of configmap changes in kube-system.
          - level: Request
            resources:
            - group: "" # core API group
              resources: ["configmaps"]
            # This rule only applies to resources in the "kube-system" namespace.
            # The empty string "" can be used to select non-namespaced resources.
            namespaces: ["kube-system"]

          # Log configmap and secret changes in all other namespaces at the Metadata level.
          - level: Metadata
            resources:
            - group: "" # core API group
              resources: ["secrets", "configmaps"]

          # Log all other resources in core and extensions at the Request level.
          - level: Request
            resources:
            - group: "" # core API group
            - group: "extensions" # Version of group should NOT be included.

          # A catch-all rule to log all other requests at the Metadata level.
          - level: Metadata

1: The log types that are collected. The value for this field can be audit for audit logs, application for application logs, infrastructure for infrastructure logs, or a named input that has been defined for your application.
2: The name of your audit policy.

2.4.4.8. Filtering application logs at input by including the label expressions or a matching label key and values

You can include the application logs based on the label expressions or a matching label key and its values by using the input selector.

Procedure

Add a configuration for a filter to the input spec in the ClusterLogForwarder CR.

The following example shows how to configure the ClusterLogForwarder CR to include logs based on label expressions or matched label key/values:

Example ClusterLogForwarder CR

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  inputs:
    - name: mylogs
      application:
        selector:
          matchExpressions:
          - key: env 1
            operator: In 2
            values: ["prod", "qa"] 3
          - key: zone
            operator: NotIn
            values: ["east", "west"]
          matchLabels: 4
            app: one
            name: app1
      type: application
# ...

1: Specifies the label key to match.
2: Specifies the operator. Valid values include: In, NotIn, Exists, and DoesNotExist.
3: Specifies an array of string values. If the operator value is either Exists or DoesNotExist, the value array must be empty.
4: Specifies an exact key or value mapping.

Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

2.4.4.9. Configuring content filters to prune log records

When the prune filter is configured, the log collector evaluates log streams according to the filters before forwarding. The collector prunes log records by removing low value fields such as pod annotations.

Procedure

Add a configuration for a filter to the prune spec in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to prune log records based on field paths:
Important
If both are specified, records are pruned based on the notIn array first, which takes precedence over the in array. After records have been pruned by using the notIn array, they are then pruned by using the in array.
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: <filter_name>
    type: prune 1
    prune: 2
      in: [.kubernetes.annotations, .kubernetes.namespace_id] 3
      notIn: [.kubernetes,.log_type,.message,."@timestamp"] 4
  pipelines:
  - name: <pipeline_name> 5
    filterRefs: ["<filter_name>"]
# ...
```
1
Specify the type of filter. The prune filter prunes log records by configured fields.
2
Specify configuration options for applying the prune filter. The in and notIn fields are specified as arrays of dot-delimited field paths, which are paths to fields in log records. These paths can contain alpha-numeric characters and underscores (a-zA-Z0-9_), for example, .kubernetes.namespace_name. If segments contain characters outside of this range, the segment must be in quotes, for example, .kubernetes.labels."foo.bar-bar/baz".
3
Optional: Any fields that are specified in this array are removed from the log record.
4
Optional: Any fields that are not specified in this array are removed from the log record.
5
Specify the pipeline that the prune filter is applied to.
Note
The filters exempts the log_type, .log_source, and .message fields.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

2.4.5. Filtering the audit and infrastructure log inputs by source

You can define the list of audit and infrastructure sources to collect the logs by using the input selector.

Procedure

Add a configuration to define the audit and infrastructure sources in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to define audit and infrastructure sources:
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  inputs:
    - name: mylogs1
      type: infrastructure
      infrastructure:
        sources: 1
          - node
    - name: mylogs2
      type: audit
      audit:
        sources: 2
          - kubeAPI
          - openshiftAPI
          - ovn
# ...
```
1
Specifies the list of infrastructure sources to collect. The valid sources include:
node: Journal log from the node
container: Logs from the workloads deployed in the namespaces
2
Specifies the list of audit sources to collect. The valid sources include:
kubeAPI: Logs from the Kubernetes API servers
openshiftAPI: Logs from the OpenShift API servers
auditd: Logs from a node auditd service
ovn: Logs from an open virtual network service
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

2.4.6. Filtering application logs at input by including or excluding the namespace or container name

You can include or exclude the application logs based on the namespace and container name by using the input selector.

Procedure

Add a configuration to include or exclude the namespace and container names in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to include or exclude namespaces and container names:
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  inputs:
    - name: mylogs
      application:
        includes:
          - namespace: "my-project" 1
            container: "my-container" 2
        excludes:
          - container: "other-container*" 3
            namespace: "other-namespace" 4
      type: application
# ...
```
1
Specifies that the logs are only collected from these namespaces.
2
Specifies that the logs are only collected from these containers.
3
Specifies the pattern of namespaces to ignore when collecting the logs.
4
Specifies the set of containers to ignore when collecting the logs.
Note
The excludes field takes precedence over the includes field.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

2.5. Storing logs with LokiStack

You can configure a LokiStack CR to store application, audit, and infrastructure-related logs.

Loki is a horizontally scalable, highly available, multi-tenant log aggregation system offered as a GA log store for logging for Red Hat OpenShift that can be visualized with the OpenShift Observability UI. The Loki configuration provided by OpenShift Logging is a short-term log store designed to enable users to perform fast troubleshooting with the collected logs. For that purpose, the logging for Red Hat OpenShift configuration of Loki has short-term storage, and is optimized for very recent queries.

Important

For long-term storage or queries over a long time period, users should look to log stores external to their cluster. Loki sizing is only tested and supported for short term storage, for a maximum of 30 days.

2.5.1. Prerequisites

You have installed the Loki Operator by using the CLI or web console.
You have a serviceAccount in the same namespace in which you create the ClusterLogForwarder.
The serviceAccount is assigned collect-audit-logs, collect-application-logs, and collect-infrastructure-logs cluster roles.

2.5.2. Core Setup and Configuration

Role-based access controls, basic monitoring, and pod placement to deploy Loki.

2.5.3. Loki deployment sizing

Sizing for Loki follows the format of 1x.<size> where the value 1x is number of instances and <size> specifies performance capabilities.

The 1x.pico configuration defines a single Loki deployment with minimal resource and limit requirements, offering high availability (HA) support for all Loki components. This configuration is suited for deployments that do not require a single replication factor or auto-compaction.

Disk requests are similar across size configurations, allowing customers to test different sizes to determine the best fit for their deployment needs.

Important

It is not possible to change the number 1x for the deployment size.

Table 2.2. Loki sizing
	1x.demo	1x.pico [6.1+ only]	1x.extra-small	1x.small	1x.medium
Data transfer	Demo use only	50GB/day	100GB/day	500GB/day	2TB/day
Queries per second (QPS)	Demo use only	1-25 QPS at 200ms	1-25 QPS at 200ms	25-50 QPS at 200ms	25-75 QPS at 200ms
Replication factor	None	2	2	2	2
Total CPU requests	None	7 vCPUs	14 vCPUs	34 vCPUs	54 vCPUs
Total CPU requests if using the ruler	None	8 vCPUs	16 vCPUs	42 vCPUs	70 vCPUs
Total memory requests	None	17Gi	31Gi	67Gi	139Gi
Total memory requests if using the ruler	None	18Gi	35Gi	83Gi	171Gi
Total disk requests	40Gi	590Gi	430Gi	430Gi	590Gi
Total disk requests if using the ruler	80Gi	910Gi	750Gi	750Gi	910Gi

2.5.4. Authorizing LokiStack rules RBAC permissions

Administrators can allow users to create and manage their own alerting and recording rules by binding cluster roles to usernames. Cluster roles are defined as ClusterRole objects that contain necessary role-based access control (RBAC) permissions for users.

The following cluster roles for alerting and recording rules are available for LokiStack:

Rule name	Description
`alertingrules.loki.grafana.com-v1-admin`	Users with this role have administrative-level access to manage alerting rules. This cluster role grants permissions to create, read, update, delete, list, and watch `AlertingRule` resources within the `loki.grafana.com/v1` API group.
`alertingrules.loki.grafana.com-v1-crdview`	Users with this role can view the definitions of Custom Resource Definitions (CRDs) related to `AlertingRule` resources within the `loki.grafana.com/v1` API group, but do not have permissions for modifying or managing these resources.
`alertingrules.loki.grafana.com-v1-edit`	Users with this role have permission to create, update, and delete `AlertingRule` resources.
`alertingrules.loki.grafana.com-v1-view`	Users with this role can read `AlertingRule` resources within the `loki.grafana.com/v1` API group. They can inspect configurations, labels, and annotations for existing alerting rules but cannot make any modifications to them.
`recordingrules.loki.grafana.com-v1-admin`	Users with this role have administrative-level access to manage recording rules. This cluster role grants permissions to create, read, update, delete, list, and watch `RecordingRule` resources within the `loki.grafana.com/v1` API group.
`recordingrules.loki.grafana.com-v1-crdview`	Users with this role can view the definitions of Custom Resource Definitions (CRDs) related to `RecordingRule` resources within the `loki.grafana.com/v1` API group, but do not have permissions for modifying or managing these resources.
`recordingrules.loki.grafana.com-v1-edit`	Users with this role have permission to create, update, and delete `RecordingRule` resources.
`recordingrules.loki.grafana.com-v1-view`	Users with this role can read `RecordingRule` resources within the `loki.grafana.com/v1` API group. They can inspect configurations, labels, and annotations for existing alerting rules but cannot make any modifications to them.

2.5.4.1. Examples

To apply cluster roles for a user, you must bind an existing cluster role to a specific username.

Cluster roles can be cluster or namespace scoped, depending on which type of role binding you use. When a RoleBinding object is used, as when using the oc adm policy add-role-to-user command, the cluster role only applies to the specified namespace. When a ClusterRoleBinding object is used, as when using the oc adm policy add-cluster-role-to-user command, the cluster role applies to all namespaces in the cluster.

The following example command gives the specified user create, read, update and delete (CRUD) permissions for alerting rules in a specific namespace in the cluster:

Example cluster role binding command for alerting rule CRUD permissions in a specific namespace

$ oc adm policy add-role-to-user alertingrules.loki.grafana.com-v1-admin -n <namespace> <username>

The following command gives the specified user administrator permissions for alerting rules in all namespaces:

Example cluster role binding command for administrator permissions

$ oc adm policy add-cluster-role-to-user alertingrules.loki.grafana.com-v1-admin <username>

2.5.5. Creating a log-based alerting rule with Loki

The AlertingRule CR contains a set of specifications and webhook validation definitions to declare groups of alerting rules for a single LokiStack instance. In addition, the webhook validation definition provides support for rule validation conditions:

If an AlertingRule CR includes an invalid interval period, it is an invalid alerting rule
If an AlertingRule CR includes an invalid for period, it is an invalid alerting rule.
If an AlertingRule CR includes an invalid LogQL expr, it is an invalid alerting rule.
If an AlertingRule CR includes two groups with the same name, it is an invalid alerting rule.
If none of the above applies, an alerting rule is considered valid.

Table 2.3. AlertingRule definitions
Tenant type	Valid namespaces for `AlertingRule` CRs
application	`<your_application_namespace>`
audit	`openshift-logging`
infrastructure	`openshift-/`, `kube-/\`, `default`

Procedure

Create an AlertingRule custom resource (CR):

Example infrastructure AlertingRule CR

  apiVersion: loki.grafana.com/v1
  kind: AlertingRule
  metadata:
    name: loki-operator-alerts
    namespace: openshift-operators-redhat 1
    labels: 2
      openshift.io/<label_name>: "true"
  spec:
    tenantID: "infrastructure" 3
    groups:
      - name: LokiOperatorHighReconciliationError
        rules:
          - alert: HighPercentageError
            expr: | 4
              sum(rate({kubernetes_namespace_name="openshift-operators-redhat", kubernetes_pod_name=~"loki-operator-controller-manager.*"} |= "error" [1m])) by (job)
                /
              sum(rate({kubernetes_namespace_name="openshift-operators-redhat", kubernetes_pod_name=~"loki-operator-controller-manager.*"}[1m])) by (job)
                > 0.01
            for: 10s
            labels:
              severity: critical 5
            annotations:
              summary: High Loki Operator Reconciliation Errors 6
              description: High Loki Operator Reconciliation Errors 7

1: The namespace where this AlertingRule CR is created must have a label matching the LokiStack spec.rules.namespaceSelector definition.
2: The labels block must match the LokiStack spec.rules.selector definition.
3: AlertingRule CRs for infrastructure tenants are only supported in the openshift-*, kube-\*, or default namespaces.
4: The value for kubernetes_namespace_name: must match the value for metadata.namespace.
5: The value of this mandatory field must be critical, warning, or info.
6: This field is mandatory.
7: This field is mandatory.

Example application AlertingRule CR

  apiVersion: loki.grafana.com/v1
  kind: AlertingRule
  metadata:
    name: app-user-workload
    namespace: app-ns 1
    labels: 2
      openshift.io/<label_name>: "true"
  spec:
    tenantID: "application"
    groups:
      - name: AppUserWorkloadHighError
        rules:
          - alert:
            expr: | 3
              sum(rate({kubernetes_namespace_name="app-ns", kubernetes_pod_name=~"podName.*"} |= "error" [1m])) by (job)
            for: 10s
            labels:
              severity: critical 4
            annotations:
              summary:  5
              description:  6

1: The namespace where this AlertingRule CR is created must have a label matching the LokiStack spec.rules.namespaceSelector definition.
2: The labels block must match the LokiStack spec.rules.selector definition.
3: Value for kubernetes_namespace_name: must match the value for metadata.namespace.
4: The value of this mandatory field must be critical, warning, or info.
5: The value of this mandatory field is a summary of the rule.
6: The value of this mandatory field is a detailed description of the rule.

Apply the AlertingRule CR:
```
$ oc apply -f <filename>.yaml
```

2.5.6. Configuring Loki to tolerate memberlist creation failure

In an OpenShift Container Platform cluster, administrators generally use a non-private IP network range. As a result, the LokiStack memberlist configuration fails because, by default, it only uses private IP networks.

As an administrator, you can select the pod network for the memberlist configuration. You can modify the LokiStack custom resource (CR) to use the podIP address in the hashRing spec. To configure the LokiStack CR, use the following command:

$ oc patch LokiStack logging-loki -n openshift-logging  --type=merge -p '{"spec": {"hashRing":{"memberlist":{"instanceAddrType":"podIP"},"type":"memberlist"}}}'

Example LokiStack to include podIP

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  hashRing:
    type: memberlist
    memberlist:
      instanceAddrType: podIP
# ...

2.5.7. Enabling stream-based retention with Loki

You can configure retention policies based on log streams. Rules for these may be set globally, per-tenant, or both. If you configure both, tenant rules apply before global rules.

Important

If there is no retention period defined on the s3 bucket or in the LokiStack custom resource (CR), then the logs are not pruned and they stay in the s3 bucket forever, which might fill up the s3 storage.

Note

Schema v13 is recommended.

Procedure

Create a LokiStack CR:

Enable stream-based retention globally as shown in the following example:

Example global stream-based retention for AWS

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
   global: 1
      retention: 2
        days: 20
        streams:
        - days: 4
          priority: 1
          selector: '{kubernetes_namespace_name=~"test.+"}' 3
        - days: 1
          priority: 1
          selector: '{log_type="infrastructure"}'
  managementState: Managed
  replicationFactor: 1
  size: 1x.small
  storage:
    schemas:
    - effectiveDate: "2020-10-11"
      version: v13
    secret:
      name: logging-loki-s3
      type: aws
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

1: Sets retention policy for all log streams. Note: This field does not impact the retention period for stored logs in object storage.
2: Retention is enabled in the cluster when this block is added to the CR.
3: Contains the LogQL query used to define the log stream.spec: limits:

Enable stream-based retention per-tenant basis as shown in the following example:

Example per-tenant stream-based retention for AWS

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
    global:
      retention:
        days: 20
    tenants: 1
      application:
        retention:
          days: 1
          streams:
            - days: 4
              selector: '{kubernetes_namespace_name=~"test.+"}' 2
      infrastructure:
        retention:
          days: 5
          streams:
            - days: 1
              selector: '{kubernetes_namespace_name=~"openshift-cluster.+"}'
  managementState: Managed
  replicationFactor: 1
  size: 1x.small
  storage:
    schemas:
    - effectiveDate: "2020-10-11"
      version: v13
    secret:
      name: logging-loki-s3
      type: aws
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

1: Sets retention policy by tenant. Valid tenant types are application, audit, and infrastructure.
2: Contains the LogQL query used to define the log stream.

Apply the LokiStack CR:
```
$ oc apply -f <filename>.yaml
```

2.5.8. Loki pod placement

You can control which nodes the Loki pods run on, and prevent other workloads from using those nodes, by using tolerations or node selectors on the pods.

You can apply tolerations to the log store pods with the LokiStack custom resource (CR) and apply taints to a node with the node specification. A taint on a node is a key:value pair that instructs the node to repel all pods that do not allow the taint. Using a specific key:value pair that is not on other pods ensures that only the log store pods can run on that node.

Example LokiStack with node selectors

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor: 1
      nodeSelector:
        node-role.kubernetes.io/infra: "" 2
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
# ...

1: Specifies the component pod type that applies to the node selector.
2: Specifies the pods that are moved to nodes containing the defined label.

Example LokiStack CR with node selectors and tolerations

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
# ...

To configure the nodeSelector and tolerations fields of the LokiStack (CR), you can use the oc explain command to view the description and fields for a particular resource:

$ oc explain lokistack.spec.template

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: template <Object>

DESCRIPTION:
     Template defines the resource/limits/tolerations/nodeselectors per
     component

FIELDS:
   compactor	<Object>
     Compactor defines the compaction component spec.

   distributor	<Object>
     Distributor defines the distributor component spec.
...

For more detailed information, you can add a specific field:

$ oc explain lokistack.spec.template.compactor

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: compactor <Object>

DESCRIPTION:
     Compactor defines the compaction component spec.

FIELDS:
   nodeSelector	<map[string]string>
     NodeSelector defines the labels required by a node to schedule the
     component onto it.
...

2.5.8.1. Enhanced Reliability and Performance

Configurations to ensure Loki’s reliability and efficiency in production.

2.5.8.2. Enabling authentication to cloud-based log stores using short-lived tokens

Workload identity federation enables authentication to cloud-based log stores using short-lived tokens.

Procedure

Use one of the following options to enable authentication:

If you use the OpenShift Container Platform web console to install the Loki Operator, clusters that use short-lived tokens are automatically detected. You are prompted to create roles and supply the data required for the Loki Operator to create a CredentialsRequest object, which populates a secret.

If you use the OpenShift CLI (oc) to install the Loki Operator, you must manually create a Subscription object using the appropriate template for your storage provider, as shown in the following examples. This authentication strategy is only supported for the storage providers indicated.

Example Azure sample subscription

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat
spec:
  channel: "stable-6.0"
  installPlanApproval: Manual
  name: loki-operator
  source: redhat-operators
  sourceNamespace: openshift-marketplace
  config:
    env:
      - name: CLIENTID
        value: <your_client_id>
      - name: TENANTID
        value: <your_tenant_id>
      - name: SUBSCRIPTIONID
        value: <your_subscription_id>
      - name: REGION
        value: <your_region>

Example AWS sample subscription

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat
spec:
  channel: "stable-6.0"
  installPlanApproval: Manual
  name: loki-operator
  source: redhat-operators
  sourceNamespace: openshift-marketplace
  config:
    env:
    - name: ROLEARN
      value: <role_ARN>

2.5.8.3. Configuring Loki to tolerate node failure

The Loki Operator supports setting pod anti-affinity rules to request that pods of the same component are scheduled on different available nodes in the cluster.

Affinity is a property of pods that controls the nodes on which they prefer to be scheduled. Anti-affinity is a property of pods that prevents a pod from being scheduled on a node.

In OpenShift Container Platform, pod affinity and pod anti-affinity allow you to constrain which nodes your pod is eligible to be scheduled on based on the key-value labels on other pods.

The Operator sets default, preferred podAntiAffinity rules for all Loki components, which includes the compactor, distributor, gateway, indexGateway, ingester, querier, queryFrontend, and ruler components.

You can override the preferred podAntiAffinity settings for Loki components by configuring required settings in the requiredDuringSchedulingIgnoredDuringExecution field:

Example user settings for the ingester component

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    ingester:
      podAntiAffinity:
      # ...
        requiredDuringSchedulingIgnoredDuringExecution: 1
        - labelSelector:
            matchLabels: 2
              app.kubernetes.io/component: ingester
          topologyKey: kubernetes.io/hostname
# ...

1: The stanza to define a required rule.
2: The key-value pair (label) that must be matched to apply the rule.

2.5.8.4. LokiStack behavior during cluster restarts

When an OpenShift Container Platform cluster is restarted, LokiStack ingestion and the query path continue to operate within the available CPU and memory resources available for the node. This means that there is no downtime for the LokiStack during OpenShift Container Platform cluster updates. This behavior is achieved by using PodDisruptionBudget resources. The Loki Operator provisions PodDisruptionBudget resources for Loki, which determine the minimum number of pods that must be available per component to ensure normal operations under certain conditions.

2.5.8.5. Advanced Deployment and Scalability

Specialized configurations for high availability, scalability, and error handling.

2.5.8.6. Zone aware data replication

The Loki Operator offers support for zone-aware data replication through pod topology spread constraints. Enabling this feature enhances reliability and safeguards against log loss in the event of a single zone failure. When configuring the deployment size as 1x.extra-small, 1x.small, or 1x.medium, the replication.factor field is automatically set to 2.

To ensure proper replication, you need to have at least as many availability zones as the replication factor specifies. While it is possible to have more availability zones than the replication factor, having fewer zones can lead to write failures. Each zone should host an equal number of instances for optimal operation.

Example LokiStack CR with zone replication enabled

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
 name: logging-loki
 namespace: openshift-logging
spec:
 replicationFactor: 2 1
 replication:
   factor: 2 2
   zones:
   -  maxSkew: 1 3
      topologyKey: topology.kubernetes.io/zone 4

1: Deprecated field, values entered are overwritten by replication.factor.
2: This value is automatically set when deployment size is selected at setup.
3: The maximum difference in number of pods between any two topology domains. The default is 1, and you cannot specify a value of 0.
4: Defines zones in the form of a topology key that corresponds to a node label.

2.5.8.7. Recovering Loki pods from failed zones

In OpenShift Container Platform a zone failure happens when specific availability zone resources become inaccessible. Availability zones are isolated areas within a cloud provider’s data center, aimed at enhancing redundancy and fault tolerance. If your OpenShift Container Platform cluster is not configured to handle this, a zone failure can lead to service or data loss.

Loki pods are part of a StatefulSet, and they come with Persistent Volume Claims (PVCs) provisioned by a StorageClass object. Each Loki pod and its PVCs reside in the same zone. When a zone failure occurs in a cluster, the StatefulSet controller automatically attempts to recover the affected pods in the failed zone.

Warning

The following procedure will delete the PVCs in the failed zone, and all data contained therein. To avoid complete data loss the replication factor field of the LokiStack CR should always be set to a value greater than 1 to ensure that Loki is replicating.

Prerequisites

Verify your LokiStack CR has a replication factor greater than 1.
Zone failure detected by the control plane, and nodes in the failed zone are marked by cloud provider integration.

The StatefulSet controller automatically attempts to reschedule pods in a failed zone. Because the associated PVCs are also in the failed zone, automatic rescheduling to a different zone does not work. You must manually delete the PVCs in the failed zone to allow successful re-creation of the stateful Loki Pod and its provisioned PVC in the new zone.

Procedure

List the pods in Pending status by running the following command:

$ oc get pods --field-selector status.phase==Pending -n openshift-logging

Example oc get pods output

NAME                           READY   STATUS    RESTARTS   AGE 1
logging-loki-index-gateway-1   0/1     Pending   0          17m
logging-loki-ingester-1        0/1     Pending   0          16m
logging-loki-ruler-1           0/1     Pending   0          16m

1: These pods are in Pending status because their corresponding PVCs are in the failed zone.

List the PVCs in Pending status by running the following command:

$ oc get pvc -o=json -n openshift-logging | jq '.items[] | select(.status.phase == "Pending") | .metadata.name' -r

Example oc get pvc output

storage-logging-loki-index-gateway-1
storage-logging-loki-ingester-1
wal-logging-loki-ingester-1
storage-logging-loki-ruler-1
wal-logging-loki-ruler-1

Delete the PVC(s) for a pod by running the following command:
```
$ oc delete pvc <pvc_name>  -n openshift-logging
```
Delete the pod(s) by running the following command:
```
$ oc delete pod <pod_name>  -n openshift-logging
```
Once these objects have been successfully deleted, they should automatically be rescheduled in an available zone.

2.5.8.7.1. Troubleshooting PVC in a terminating state

The PVCs might hang in the terminating state without being deleted, if PVC metadata finalizers are set to kubernetes.io/pv-protection. Removing the finalizers should allow the PVCs to delete successfully.

Remove the finalizer for each PVC by running the command below, then retry deletion.

$ oc patch pvc <pvc_name> -p '{"metadata":{"finalizers":null}}' -n openshift-logging

2.5.8.8. Troubleshooting Loki rate limit errors

If the Log Forwarder API forwards a large block of messages that exceeds the rate limit to Loki, Loki generates rate limit (429) errors.

These errors can occur during normal operation. For example, when adding the logging to a cluster that already has some logs, rate limit errors might occur while the logging tries to ingest all of the existing log entries. In this case, if the rate of addition of new logs is less than the total rate limit, the historical data is eventually ingested, and the rate limit errors are resolved without requiring user intervention.

In cases where the rate limit errors continue to occur, you can fix the issue by modifying the LokiStack custom resource (CR).

Important

The LokiStack CR is not available on Grafana-hosted Loki. This topic does not apply to Grafana-hosted Loki servers.

Conditions

The Log Forwarder API is configured to forward logs to Loki.

Your system sends a block of messages that is larger than 2 MB to Loki. For example:

"values":[["1630410392689800468","{\"kind\":\"Event\",\"apiVersion\":\
.......
......
......
......
\"received_at\":\"2021-08-31T11:46:32.800278+00:00\",\"version\":\"1.7.4 1.6.0\"}},\"@timestamp\":\"2021-08-31T11:46:32.799692+00:00\",\"viaq_index_name\":\"audit-write\",\"viaq_msg_id\":\"MzFjYjJkZjItNjY0MC00YWU4LWIwMTEtNGNmM2E5ZmViMGU4\",\"log_type\":\"audit\"}"]]}]}

After you enter oc logs -n openshift-logging -l component=collector, the collector logs in your cluster show a line containing one of the following error messages:

429 Too Many Requests Ingestion rate limit exceeded

Example Vector error message

2023-08-25T16:08:49.301780Z  WARN sink{component_kind="sink" component_id=default_loki_infra component_type=loki component_name=default_loki_infra}: vector::sinks::util::retries: Retrying after error. error=Server responded with an error: 429 Too Many Requests internal_log_rate_limit=true

Example Fluentd error message

2023-08-30 14:52:15 +0000 [warn]: [default_loki_infra] failed to flush the buffer. retry_times=2 next_retry_time=2023-08-30 14:52:19 +0000 chunk="604251225bf5378ed1567231a1c03b8b" error_class=Fluent::Plugin::LokiOutput::LogPostError error="429 Too Many Requests Ingestion rate limit exceeded for user infrastructure (limit: 4194304 bytes/sec) while attempting to ingest '4082' lines totaling '7820025' bytes, reduce log volume or contact your Loki administrator to see if the limit can be increased\n"

The error is also visible on the receiving end. For example, in the LokiStack ingester pod:

Example Loki ingester error message

level=warn ts=2023-08-30T14:57:34.155592243Z caller=grpc_logging.go:43 duration=1.434942ms method=/logproto.Pusher/Push err="rpc error: code = Code(429) desc = entry with timestamp 2023-08-30 14:57:32.012778399 +0000 UTC ignored, reason: 'Per stream rate limit exceeded (limit: 3MB/sec) while attempting to ingest for stream

Procedure

Update the ingestionBurstSize and ingestionRate fields in the LokiStack CR:
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
    global:
      ingestion:
        ingestionBurstSize: 16 1
        ingestionRate: 8 2
# ...
```
1
The ingestionBurstSize field defines the maximum local rate-limited sample size per distributor replica in MB. This value is a hard limit. Set this value to at least the maximum logs size expected in a single push request. Single requests that are larger than the ingestionBurstSize value are not permitted.
2
The ingestionRate field is a soft limit on the maximum amount of ingested samples per second in MB. Rate limit errors occur if the rate of logs exceeds the limit, but the collector retries sending the logs. As long as the total average is lower than the limit, the system recovers and errors are resolved without user intervention.

2.6. Visualization for logging

Visualization for logging is provided by deploying the Logging UI Plugin of the Cluster Observability Operator, which requires Operator installation.

Important

Until the approaching General Availability (GA) release of the Cluster Observability Operator (COO), which is currently in Technology Preview (TP), Red Hat provides support to customers who are using Logging 6.0 or later with the COO for its Logging UI Plugin on OpenShift Container Platform 4.14 or later. This support exception is temporary as the COO includes several independent features, some of which are still TP features, but the Logging UI Plugin is ready for GA.

Chapter 3. Logging 6.1

3.1. Logging 6.1

3.1.1. Logging 6.1.0 Release Notes

This release includes Logging for Red Hat OpenShift Bug Fix Release 6.1.0.

3.1.1.1. New Features and Enhancements

3.1.1.1.1. Log Collection

This enhancement adds the source iostream to the attributes sent from collected container logs. The value is set to either stdout or stderr based on how the collector received it. (LOG-5292)
With this update, the default memory limit for the collector increases from 1024 Mi to 2048 Mi. Users should adjust resource limits based on their cluster’s specific needs and specifications. (LOG-6072)
With this update, users can now set the syslog output delivery mode of the ClusterLogForwarder CR to either AtLeastOnce or AtMostOnce. (LOG-6355)

3.1.1.1.2. Log Storage

With this update, the new 1x.pico LokiStack size supports clusters with fewer workloads and lower log volumes (up to 50GB/day). (LOG-5939)

3.1.1.2. Technology Preview

Important

The OpenTelemetry Protocol (OTLP) output log forwarder is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope.

With this update, OpenTelemetry logs can now be forwarded using the OTel (OpenTelemetry) data model to a Red Hat Managed LokiStack instance. To enable this feature, add the observability.openshift.io/tech-preview-otlp-output: "enabled" annotation to your ClusterLogForwarder configuration. For additional configuration information, see OTLP Forwarding.
With this update, a dataModel field has been added to the lokiStack output specification. Set the dataModel to Otel to configure log forwarding using the OpenTelemetry data format. The default is set to Viaq. For information about data mapping see OTLP Specification.

3.1.1.3. Bug Fixes

None.

3.1.1.4. CVEs

3.2. Logging 6.1

context: logging-6x-6.1

The ClusterLogForwarder custom resource (CR) is the central configuration point for log collection and forwarding.

3.2.1. Inputs and outputs

Inputs specify the sources of logs to be forwarded. Logging provides built-in input types: application, receiver, infrastructure, and audit, which select logs from different parts of your cluster. You can also define custom inputs based on namespaces or pod labels to fine-tune log selection.

Outputs define the destinations where logs are sent. Each output type has its own set of configuration options, allowing you to customize the behavior and authentication settings.

3.2.2. Receiver input type

The receiver input type enables the Logging system to accept logs from external sources. It supports two formats for receiving logs: http and syslog.

The ReceiverSpec defines the configuration for a receiver input.

3.2.3. Pipelines and filters

3.2.4. Operator behavior

The Cluster Logging Operator manages the deployment and configuration of the collector based on the managementState field of the ClusterLogForwarder resource:

When set to Managed (default), the operator actively manages the logging resources to match the configuration defined in the spec.
When set to Unmanaged, the operator does not take any action, allowing you to manually manage the logging components.

3.2.5. Validation

3.2.6. Quick start

OpenShift Logging supports two data models:

ViaQ (General Availability)
OpenTelemetry (Technology Preview)

You can select either of these data models based on your requirement by configuring the lokiStack.dataModel field in the ClusterLogForwarder. ViaQ is the default data model when forwarding logs to LokiStack.

Note

In future releases of OpenShift Logging, the default data model will change from ViaQ to OpenTelemetry.

3.2.6.1. Quick start with ViaQ

To use the default ViaQ data model, follow these steps:

Prerequisites

Cluster administrator permissions

Procedure

Install the Red Hat OpenShift Logging Operator, Loki Operator, and Cluster Observability Operator (COO) from OperatorHub.

Create a LokiStack custom resource (CR) in the openshift-logging namespace:

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  managementState: Managed
  size: 1x.extra-small
  storage:
    schemas:
    - effectiveDate: '2024-10-01'
      version: v13
    secret:
      name: logging-loki-s3
      type: s3
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

Note

Ensure that the logging-loki-s3 secret is created beforehand. The contents of this secret vary depending on the object storage in use. For more information, see Secrets and TLS Configuration.

Create a service account for the collector:

$ oc create sa collector -n openshift-logging

Allow the collector’s service account to write data to the LokiStack CR:
```
$ oc adm policy add-cluster-role-to-user logging-collector-logs-writer -z collector
```
Note
The ClusterRole resource is created automatically during the Cluster Logging Operator installation and does not need to be created manually.
Allow the collector’s service account to collect logs:
```
$ oc project openshift-logging
```
```
$ oc adm policy add-cluster-role-to-user collect-application-logs -z collector
```
```
$ oc adm policy add-cluster-role-to-user collect-audit-logs -z collector
```
```
$ oc adm policy add-cluster-role-to-user collect-infrastructure-logs -z collector
```
Note
The example binds the collector to all three roles (application, infrastructure, and audit), but by default, only application and infrastructure logs are collected. To collect audit logs, update your ClusterLogForwarder configuration to include them. Assign roles based on the specific log types required for your environment.

Create a UIPlugin CR to enable the Log section in the Observe tab:

apiVersion: observability.openshift.io/v1alpha1
kind: UIPlugin
metadata:
  name: logging
spec:
  type: Logging
  logging:
    lokiStack:
      name: logging-loki

Create a ClusterLogForwarder CR to configure log forwarding:

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: collector
  namespace: openshift-logging
spec:
  serviceAccount:
    name: collector
  outputs:
  - name: default-lokistack
    type: lokiStack
    lokiStack:
      authentication:
        token:
          from: serviceAccount
      target:
        name: logging-loki
        namespace: openshift-logging
    tls:
      ca:
        key: service-ca.crt
        configMapName: openshift-service-ca.crt
  pipelines:
  - name: default-logstore
    inputRefs:
    - application
    - infrastructure
    outputRefs:
    - default-lokistack

Note

The dataModel field is optional and left unset (dataModel: "") by default. This allows the Cluster Logging Operator (CLO) to automatically select a data model. Currently, the CLO defaults to the ViaQ model when the field is unset, but this will change in future releases. Specifying dataModel: ViaQ ensures the configuration remains compatible if the default changes.

Verification

Verify that logs are visible in the Log section of the Observe tab in the OpenShift web console.

3.2.6.2. Quick start with OpenTelemetry

Important

For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope.

To configure OTLP ingestion and enable the OpenTelemetry data model, follow these steps:

Prerequisites

Cluster administrator permissions

Procedure

Install the Red Hat OpenShift Logging Operator, Loki Operator, and Cluster Observability Operator (COO) from OperatorHub.

Create a LokiStack custom resource (CR) in the openshift-logging namespace:

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  managementState: Managed
  size: 1x.extra-small
  storage:
    schemas:
    - effectiveDate: '2024-10-01'
      version: v13
    secret:
      name: logging-loki-s3
      type: s3
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

Note

Ensure that the logging-loki-s3 secret is created beforehand. The contents of this secret vary depending on the object storage in use. For more information, see "Secrets and TLS Configuration".

Create a service account for the collector:

$ oc create sa collector -n openshift-logging

Allow the collector’s service account to write data to the LokiStack CR:
```
$ oc adm policy add-cluster-role-to-user logging-collector-logs-writer -z collector
```
Note
The ClusterRole resource is created automatically during the Cluster Logging Operator installation and does not need to be created manually.
Allow the collector’s service account to collect logs:
```
$ oc project openshift-logging
```
```
$ oc adm policy add-cluster-role-to-user collect-application-logs -z collector
```
```
$ oc adm policy add-cluster-role-to-user collect-audit-logs -z collector
```
```
$ oc adm policy add-cluster-role-to-user collect-infrastructure-logs -z collector
```
Note
The example binds the collector to all three roles (application, infrastructure, and audit). By default, only application and infrastructure logs are collected. To collect audit logs, update your ClusterLogForwarder configuration to include them. Assign roles based on the specific log types required for your environment.

Create a UIPlugin CR to enable the Log section in the Observe tab:

apiVersion: observability.openshift.io/v1alpha1
kind: UIPlugin
metadata:
  name: logging
spec:
  type: Logging
  logging:
    lokiStack:
      name: logging-loki

Create a ClusterLogForwarder CR to configure log forwarding:

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: collector
  namespace: openshift-logging
  annotations:
    observability.openshift.io/tech-preview-otlp-output: "enabled" 1
spec:
  serviceAccount:
    name: collector
  outputs:
  - name: loki-otlp
    type: lokiStack 2
    lokiStack:
      target:
        name: logging-loki
        namespace: openshift-logging
      dataModel: Otel 3
      authentication:
        token:
          from: serviceAccount
    tls:
      ca:
        key: service-ca.crt
        configMapName: openshift-service-ca.crt
  pipelines:
  - name: my-pipeline
    inputRefs:
    - application
    - infrastructure
    outputRefs:
    - loki-otlp

1: Use the annotation to enable the Otel data model, which is a Technology Preview feature.
2: Define the output type as lokiStack.
3: Specifies the OpenTelemetry data model.

Note

You cannot use lokiStack.labelKeys when dataModel is Otel. To achieve similar functionality when dataModel is Otel, refer to "Configuring LokiStack for OTLP data ingestion".

Verification

Verify that OTLP is functioning correctly by going to Observe → OpenShift Logging → LokiStack → Writes in the OpenShift web console, and checking Distributor - Structured Metadata.

3.3. Configuring log forwarding

Key Functions of the ClusterLogForwarder

Selects log messages using inputs
Forwards logs to external destinations using outputs
Filters, transforms, and drops log messages using filters
Defines log forwarding pipelines connecting inputs, filters and outputs

3.3.1. Setting up log collection

Setup log collection by binding the required cluster roles to your service account.

3.3.1.1. Legacy service accounts

To use the existing legacy service account logcollector, create the following ClusterRoleBinding:

$ oc adm policy add-cluster-role-to-user collect-application-logs system:serviceaccount:openshift-logging:logcollector
$ oc adm policy add-cluster-role-to-user collect-infrastructure-logs system:serviceaccount:openshift-logging:logcollector

Additionally, create the following ClusterRoleBinding if collecting audit logs:

$ oc adm policy add-cluster-role-to-user collect-audit-logs system:serviceaccount:openshift-logging:logcollector

3.3.1.2. Creating service accounts

Prerequisites

The Red Hat OpenShift Logging Operator is installed in the openshift-logging namespace.
You have administrator permissions.

Procedure

Create a service account for the collector. If you want to write logs to storage that requires a token for authentication, you must include a token in the service account.

Bind the appropriate cluster roles to the service account:

Example binding command

$ oc adm policy add-cluster-role-to-user <cluster_role_name> system:serviceaccount:<namespace_name>:<service_account_name>

3.3.1.2.1. Cluster Role Binding for your Service Account

The role_binding.yaml file binds the ClusterLogging operator’s ClusterRole to a specific ServiceAccount, allowing it to manage Kubernetes resources cluster-wide.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: manager-rolebinding
roleRef:                                           1
  apiGroup: rbac.authorization.k8s.io              2
  kind: ClusterRole                                3
  name: cluster-logging-operator                   4
subjects:                                          5
  - kind: ServiceAccount                           6
    name: cluster-logging-operator                 7
    namespace: openshift-logging                   8

1: roleRef: References the ClusterRole to which the binding applies.
2: apiGroup: Indicates the RBAC API group, specifying that the ClusterRole is part of Kubernetes' RBAC system.
3: kind: Specifies that the referenced role is a ClusterRole, which applies cluster-wide.
4: name: The name of the ClusterRole being bound to the ServiceAccount, here cluster-logging-operator.
5: subjects: Defines the entities (users or service accounts) that are being granted the permissions from the ClusterRole.
6: kind: Specifies that the subject is a ServiceAccount.
7: Name: The name of the ServiceAccount being granted the permissions.
8: namespace: Indicates the namespace where the ServiceAccount is located.

3.3.1.2.2. Writing application logs

The write-application-logs-clusterrole.yaml file defines a ClusterRole that grants permissions to write application logs to the Loki logging application.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-logging-write-application-logs
rules:                                              1
  - apiGroups:                                      2
      - loki.grafana.com                            3
    resources:                                      4
      - application                                 5
    resourceNames:                                  6
      - logs                                        7
    verbs:                                          8
      - create                                      9
Annotations
<1> rules: Specifies the permissions granted by this ClusterRole.
<2> apiGroups: Refers to the API group loki.grafana.com, which relates to the Loki logging system.
<3> loki.grafana.com: The API group for managing Loki-related resources.
<4> resources: The resource type that the ClusterRole grants permission to interact with.
<5> application: Refers to the application resources within the Loki logging system.
<6> resourceNames: Specifies the names of resources that this role can manage.
<7> logs: Refers to the log resources that can be created.
<8> verbs: The actions allowed on the resources.
<9> create: Grants permission to create new logs in the Loki system.

3.3.1.2.3. Writing audit logs

The write-audit-logs-clusterrole.yaml file defines a ClusterRole that grants permissions to create audit logs in the Loki logging system.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-logging-write-audit-logs
rules:                                              1
  - apiGroups:                                      2
      - loki.grafana.com                            3
    resources:                                      4
      - audit                                       5
    resourceNames:                                  6
      - logs                                        7
    verbs:                                          8
      - create                                      9

1 1: rules: Defines the permissions granted by this ClusterRole.
2 2: apiGroups: Specifies the API group loki.grafana.com.
3 3: loki.grafana.com: The API group responsible for Loki logging resources.
4 4: resources: Refers to the resource type this role manages, in this case, audit.
5 5: audit: Specifies that the role manages audit logs within Loki.
6 6: resourceNames: Defines the specific resources that the role can access.
7 7: logs: Refers to the logs that can be managed under this role.
8 8: verbs: The actions allowed on the resources.
9 9: create: Grants permission to create new audit logs.

3.3.1.2.4. Writing infrastructure logs

The write-infrastructure-logs-clusterrole.yaml file defines a ClusterRole that grants permission to create infrastructure logs in the Loki logging system.

Sample YAML

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-logging-write-infrastructure-logs
rules:                                              1
  - apiGroups:                                      2
      - loki.grafana.com                            3
    resources:                                      4
      - infrastructure                              5
    resourceNames:                                  6
      - logs                                        7
    verbs:                                          8
      - create                                      9

1: rules: Specifies the permissions this ClusterRole grants.
2: apiGroups: Specifies the API group for Loki-related resources.
3: loki.grafana.com: The API group managing the Loki logging system.
4: resources: Defines the resource type that this role can interact with.
5: infrastructure: Refers to infrastructure-related resources that this role manages.
6: resourceNames: Specifies the names of resources this role can manage.
7: logs: Refers to the log resources related to infrastructure.
8: verbs: The actions permitted by this role.
9: create: Grants permission to create infrastructure logs in the Loki system.

3.3.1.2.5. ClusterLogForwarder editor role

The clusterlogforwarder-editor-role.yaml file defines a ClusterRole that allows users to manage ClusterLogForwarders in OpenShift.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: clusterlogforwarder-editor-role
rules:                                              1
  - apiGroups:                                      2
      - observability.openshift.io                  3
    resources:                                      4
      - clusterlogforwarders                        5
    verbs:                                          6
      - create                                      7
      - delete                                      8
      - get                                         9
      - list                                        10
      - patch                                       11
      - update                                      12
      - watch                                       13

1: rules: Specifies the permissions this ClusterRole grants.
2: apiGroups: Refers to the OpenShift-specific API group
3: obervability.openshift.io: The API group for managing observability resources, like logging.
4: resources: Specifies the resources this role can manage.
5: clusterlogforwarders: Refers to the log forwarding resources in OpenShift.
6: verbs: Specifies the actions allowed on the ClusterLogForwarders.
7: create: Grants permission to create new ClusterLogForwarders.
8: delete: Grants permission to delete existing ClusterLogForwarders.
9: get: Grants permission to retrieve information about specific ClusterLogForwarders.
10: list: Allows listing all ClusterLogForwarders.
11: patch: Grants permission to partially modify ClusterLogForwarders.
12: update: Grants permission to update existing ClusterLogForwarders.
13: watch: Grants permission to monitor changes to ClusterLogForwarders.

3.3.2. Modifying log level in collector

To modify the log level in the collector, you can set the observability.openshift.io/log-level annotation to trace, debug, info, warn, error, and off.

Example log level annotation

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: collector
  annotations:
    observability.openshift.io/log-level: debug
# ...

3.3.3. Managing the Operator

The ClusterLogForwarder resource has a managementState field that controls whether the operator actively manages its resources or leaves them Unmanaged:

Managed: (default) The operator will drive the logging resources to match the desired state in the CLF spec.
Unmanaged: The operator will not take any action related to the logging components.

This allows administrators to temporarily pause log forwarding by setting managementState to Unmanaged.

3.3.4. Structure of the ClusterLogForwarder

The CLF has a spec section that contains the following key components:

Inputs: Select log messages to be forwarded. Built-in input types application, infrastructure and audit forward logs from different parts of the cluster. You can also define custom inputs.
Outputs: Define destinations to forward logs to. Each output has a unique name and type-specific configuration.
Pipelines: Define the path logs take from inputs, through filters, to outputs. Pipelines have a unique name and consist of a list of input, output and filter names.
Filters: Transform or drop log messages in the pipeline. Users can define filters that match certain log fields and drop or modify the messages. Filters are applied in the order specified in the pipeline.

3.3.4.1. Inputs

Inputs are configured in an array under spec.inputs. There are three built-in input types:

application: Selects logs from all application containers, excluding those in infrastructure namespaces such as default, openshift, or any namespace with the kube- or openshift- prefix.
infrastructure: Selects logs from infrastructure components running in default and openshift namespaces and node logs.
audit: Selects logs from the OpenShift API server audit logs, Kubernetes API server audit logs, ovn audit logs, and node audit logs from auditd.

Users can define custom inputs of type application that select logs from specific namespaces or using pod labels.

3.3.4.2. Outputs

Outputs are configured in an array under spec.outputs. Each output must have a unique name and a type. Supported types are:

azureMonitor: Forwards logs to Azure Monitor.
cloudwatch: Forwards logs to AWS CloudWatch.
elasticsearch: Forwards logs to an external Elasticsearch instance.
googleCloudLogging: Forwards logs to Google Cloud Logging.
http: Forwards logs to a generic HTTP endpoint.
kafka: Forwards logs to a Kafka broker.
loki: Forwards logs to a Loki logging backend.
lokistack: Forwards logs to the logging supported combination of Loki and web proxy with OpenShift Container Platform authentication integration. LokiStack’s proxy uses OpenShift Container Platform authentication to enforce multi-tenancy
otlp: Forwards logs using the OpenTelemetry Protocol.
splunk: Forwards logs to Splunk.
syslog: Forwards logs to an external syslog server.

Each output type has its own configuration fields.

3.3.5. Configuring OTLP output

Cluster administrators can use the OpenTelemetry Protocol (OTLP) output to collect and forward logs to OTLP receivers. The OTLP output uses the specification defined by the OpenTelemetry Observability framework to send data over HTTP with JSON encoding.

Important

For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope.

Procedure

Create or edit a ClusterLogForwarder custom resource (CR) to enable forwarding using OTLP by adding the following annotation:

Example ClusterLogForwarder CR

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  annotations:
    observability.openshift.io/tech-preview-otlp-output: "enabled" 1
  name: clf-otlp
spec:
  serviceAccount:
    name: <service_account_name>
  outputs:
  - name: otlp
    type: otlp
    otlp:
      tuning:
        compression: gzip
        deliveryMode: AtLeastOnce
        maxRetryDuration: 20
        maxWrite: 10M
        minRetryDuration: 5
      url: <otlp_url> 2
  pipelines:
  - inputRefs:
    - application
    - infrastructure
    - audit
    name: otlp-logs
    outputRefs:
    - otlp

1: Use this annotation to enable the OpenTelemetry Protocol (OTLP) output, which is a Technology Preview feature.
2: This URL must be absolute and is a placeholder for the OTLP endpoint where logs are sent.

Note

The OTLP output uses the OpenTelemetry data model, which is different from the ViaQ data model that is used by other output types. It adheres to the OTLP using OpenTelemetry Semantic Conventions defined by the OpenTelemetry Observability framework.

3.3.5.1. Pipelines

Pipelines are configured in an array under spec.pipelines. Each pipeline must have a unique name and consists of:

inputRefs: Names of inputs whose logs should be forwarded to this pipeline.
outputRefs: Names of outputs to send logs to.
filterRefs: (optional) Names of filters to apply.

The order of filterRefs matters, as they are applied sequentially. Earlier filters can drop messages that will not be processed by later filters.

3.3.5.2. Filters

Filters are configured in an array under spec.filters. They can match incoming log messages based on the value of structured fields and modify or drop them.

Administrators can configure the following types of filters:

3.3.5.3. Enabling multi-line exception detection

Enables multi-line error detection of container logs.

Warning

Enabling this feature could have performance implications and may require additional computing resources or alternate logging solutions.

Log parsers often incorrectly identify separate lines of the same exception as separate exceptions. This leads to extra log entries and an incomplete or inaccurate view of the traced information.

Example java exception

java.lang.NullPointerException: Cannot invoke "String.toString()" because "<param1>" is null
    at testjava.Main.handle(Main.java:47)
    at testjava.Main.printMe(Main.java:19)
    at testjava.Main.main(Main.java:10)

To enable logging to detect multi-line exceptions and reassemble them into a single log entry, ensure that the ClusterLogForwarder Custom Resource (CR) contains a detectMultilineErrors field under the .spec.filters.

Example ClusterLogForwarder CR

apiVersion: "observability.openshift.io/v1"
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name>
  namespace: <log_forwarder_namespace>
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: <name>
    type: detectMultilineException
  pipelines:
    - inputRefs:
        - <input-name>
      name: <pipeline-name>
      filterRefs:
        - <filter-name>
      outputRefs:
        - <output-name>

3.3.5.3.1. Details

The collector supports the following languages:

Java
JS
Ruby
Python
Golang
PHP
Dart

3.3.5.4. Configuring content filters to drop unwanted log records

Procedure

Add a configuration for a filter to the filters spec in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to drop log records based on regular expressions:
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: <filter_name>
    type: drop 1
    drop: 2
    - test: 3
      - field: .kubernetes.labels."foo-bar/baz" 4
        matches: .+ 5
      - field: .kubernetes.pod_name
        notMatches: "my-pod" 6
  pipelines:
  - name: <pipeline_name> 7
    filterRefs: ["<filter_name>"]
# ...
```
1
Specifies the type of filter. The drop filter drops log records that match the filter configuration.
2
Specifies configuration options for applying the drop filter.
3
Specifies the configuration for tests that are used to evaluate whether a log record is dropped.
If all the conditions specified for a test are true, the test passes and the log record is dropped.
When multiple tests are specified for the drop filter configuration, if any of the tests pass, the record is dropped.
If there is an error evaluating a condition, for example, the field is missing from the log record being evaluated, that condition evaluates to false.
4
Specifies a dot-delimited field path, which is a path to a field in the log record. The path can contain alpha-numeric characters and underscores (a-zA-Z0-9_), for example, .kubernetes.namespace_name. If segments contain characters outside of this range, the segment must be in quotes, for example, .kubernetes.labels."foo.bar-bar/baz". You can include multiple field paths in a single test configuration, but they must all evaluate to true for the test to pass and the drop filter to be applied.
5
Specifies a regular expression. If log records match this regular expression, they are dropped. You can set either the matches or notMatches condition for a single field path, but not both.
6
Specifies a regular expression. If log records do not match this regular expression, they are dropped. You can set either the matches or notMatches condition for a single field path, but not both.
7
Specifies the pipeline that the drop filter is applied to.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

Additional examples

The following additional example shows how you can configure the drop filter to only keep higher priority log records:

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: important
    type: drop
    drop:
    - test:
      - field: .message
        notMatches: "(?i)critical|error"
      - field: .level
        matches: "info|warning"
# ...

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: important
    type: drop
    drop:
    - test:
      - field: .kubernetes.namespace_name
        matches: "^open"
    - test:
      - field: .log_type
        matches: "application"
      - field: .kubernetes.pod_name
        notMatches: "my-pod"
# ...

3.3.5.5. Overview of API audit filter

None: The event is dropped.
Metadata: Audit metadata is included, request and response bodies are removed.
Request: Audit metadata and the request body are included, the response body is removed.
RequestResponse: All data is included: metadata, request body and response body. The response body can be very large. For example, oc get pods -A generates a response body containing the YAML description of every pod in the cluster.

The ClusterLogForwarder custom resource (CR) uses the same format as the standard Kubernetes audit policy, while providing the following additional functions:

Wildcards

Default Rules

Events that do not match any rule in the policy are filtered as follows:

Read-only system events such as get, list, and watch are dropped.
Service account write events that occur within the same namespace as the service account are dropped.
All other events are forwarded, subject to any configured rate limits.

To disable these defaults, either end your rules list with a rule that has only a level field or add an empty rule.

Omit Response Codes: A list of integer status codes to omit. You can drop events based on the HTTP status code in the response by using the OmitResponseCodes field, which lists HTTP status codes for which no events are created. The default value is [404, 409, 422, 429]. If the value is an empty list, [], then no status codes are omitted.

Note

Example audit policy

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name>
  namespace: <log_forwarder_namespace>
spec:
  serviceAccount:
    name: <service_account_name>
  pipelines:
    - name: my-pipeline
      inputRefs: audit 1
      filterRefs: my-policy 2
  filters:
    - name: my-policy
      type: kubeAPIAudit
      kubeAPIAudit:
        # Don't generate audit events for all requests in RequestReceived stage.
        omitStages:
          - "RequestReceived"

        rules:
          # Log pod changes at RequestResponse level
          - level: RequestResponse
            resources:
            - group: ""
              resources: ["pods"]

          # Log "pods/log", "pods/status" at Metadata level
          - level: Metadata
            resources:
            - group: ""
              resources: ["pods/log", "pods/status"]

          # Don't log requests to a configmap called "controller-leader"
          - level: None
            resources:
            - group: ""
              resources: ["configmaps"]
              resourceNames: ["controller-leader"]

          # Don't log watch requests by the "system:kube-proxy" on endpoints or services
          - level: None
            users: ["system:kube-proxy"]
            verbs: ["watch"]
            resources:
            - group: "" # core API group
              resources: ["endpoints", "services"]

          # Don't log authenticated requests to certain non-resource URL paths.
          - level: None
            userGroups: ["system:authenticated"]
            nonResourceURLs:
            - "/api*" # Wildcard matching.
            - "/version"

          # Log the request body of configmap changes in kube-system.
          - level: Request
            resources:
            - group: "" # core API group
              resources: ["configmaps"]
            # This rule only applies to resources in the "kube-system" namespace.
            # The empty string "" can be used to select non-namespaced resources.
            namespaces: ["kube-system"]

          # Log configmap and secret changes in all other namespaces at the Metadata level.
          - level: Metadata
            resources:
            - group: "" # core API group
              resources: ["secrets", "configmaps"]

          # Log all other resources in core and extensions at the Request level.
          - level: Request
            resources:
            - group: "" # core API group
            - group: "extensions" # Version of group should NOT be included.

          # A catch-all rule to log all other requests at the Metadata level.
          - level: Metadata

1: The log types that are collected. The value for this field can be audit for audit logs, application for application logs, infrastructure for infrastructure logs, or a named input that has been defined for your application.
2: The name of your audit policy.

3.3.5.6. Filtering application logs at input by including the label expressions or a matching label key and values

You can include the application logs based on the label expressions or a matching label key and its values by using the input selector.

Procedure

Add a configuration for a filter to the input spec in the ClusterLogForwarder CR.

The following example shows how to configure the ClusterLogForwarder CR to include logs based on label expressions or matched label key/values:

Example ClusterLogForwarder CR

apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  inputs:
    - name: mylogs
      application:
        selector:
          matchExpressions:
          - key: env 1
            operator: In 2
            values: ["prod", "qa"] 3
          - key: zone
            operator: NotIn
            values: ["east", "west"]
          matchLabels: 4
            app: one
            name: app1
      type: application
# ...

1: Specifies the label key to match.
2: Specifies the operator. Valid values include: In, NotIn, Exists, and DoesNotExist.
3: Specifies an array of string values. If the operator value is either Exists or DoesNotExist, the value array must be empty.
4: Specifies an exact key or value mapping.

Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

3.3.5.7. Configuring content filters to prune log records

Procedure

Add a configuration for a filter to the prune spec in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to prune log records based on field paths:
Important
If both are specified, records are pruned based on the notIn array first, which takes precedence over the in array. After records have been pruned by using the notIn array, they are then pruned by using the in array.
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  filters:
  - name: <filter_name>
    type: prune 1
    prune: 2
      in: [.kubernetes.annotations, .kubernetes.namespace_id] 3
      notIn: [.kubernetes,.log_type,.message,."@timestamp"] 4
  pipelines:
  - name: <pipeline_name> 5
    filterRefs: ["<filter_name>"]
# ...
```
1
Specify the type of filter. The prune filter prunes log records by configured fields.
2
Specify configuration options for applying the prune filter. The in and notIn fields are specified as arrays of dot-delimited field paths, which are paths to fields in log records. These paths can contain alpha-numeric characters and underscores (a-zA-Z0-9_), for example, .kubernetes.namespace_name. If segments contain characters outside of this range, the segment must be in quotes, for example, .kubernetes.labels."foo.bar-bar/baz".
3
Optional: Any fields that are specified in this array are removed from the log record.
4
Optional: Any fields that are not specified in this array are removed from the log record.
5
Specify the pipeline that the prune filter is applied to.
Note
The filters exempts the log_type, .log_source, and .message fields.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

3.3.6. Filtering the audit and infrastructure log inputs by source

You can define the list of audit and infrastructure sources to collect the logs by using the input selector.

Procedure

Add a configuration to define the audit and infrastructure sources in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to define audit and infrastructure sources:
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  inputs:
    - name: mylogs1
      type: infrastructure
      infrastructure:
        sources: 1
          - node
    - name: mylogs2
      type: audit
      audit:
        sources: 2
          - kubeAPI
          - openshiftAPI
          - ovn
# ...
```
1
Specifies the list of infrastructure sources to collect. The valid sources include:
node: Journal log from the node
container: Logs from the workloads deployed in the namespaces
2
Specifies the list of audit sources to collect. The valid sources include:
kubeAPI: Logs from the Kubernetes API servers
openshiftAPI: Logs from the OpenShift API servers
auditd: Logs from a node auditd service
ovn: Logs from an open virtual network service
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

3.3.7. Filtering application logs at input by including or excluding the namespace or container name

You can include or exclude the application logs based on the namespace and container name by using the input selector.

Procedure

Add a configuration to include or exclude the namespace and container names in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to include or exclude namespaces and container names:
Example ClusterLogForwarder CR
```
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
# ...
spec:
  serviceAccount:
    name: <service_account_name>
  inputs:
    - name: mylogs
      application:
        includes:
          - namespace: "my-project" 1
            container: "my-container" 2
        excludes:
          - container: "other-container*" 3
            namespace: "other-namespace" 4
      type: application
# ...
```
1
Specifies that the logs are only collected from these namespaces.
2
Specifies that the logs are only collected from these containers.
3
Specifies the pattern of namespaces to ignore when collecting the logs.
4
Specifies the set of containers to ignore when collecting the logs.
Note
The excludes field takes precedence over the includes field.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

3.4. Storing logs with LokiStack

You can configure a LokiStack CR to store application, audit, and infrastructure-related logs.

Important

3.4.1. Loki deployment sizing

Sizing for Loki follows the format of 1x.<size> where the value 1x is number of instances and <size> specifies performance capabilities.

Disk requests are similar across size configurations, allowing customers to test different sizes to determine the best fit for their deployment needs.

Important

It is not possible to change the number 1x for the deployment size.

Table 3.1. Loki sizing
	1x.demo	1x.pico [6.1+ only]	1x.extra-small	1x.small	1x.medium
Data transfer	Demo use only	50GB/day	100GB/day	500GB/day	2TB/day
Queries per second (QPS)	Demo use only	1-25 QPS at 200ms	1-25 QPS at 200ms	25-50 QPS at 200ms	25-75 QPS at 200ms
Replication factor	None	2	2	2	2
Total CPU requests	None	7 vCPUs	14 vCPUs	34 vCPUs	54 vCPUs
Total CPU requests if using the ruler	None	8 vCPUs	16 vCPUs	42 vCPUs	70 vCPUs
Total memory requests	None	17Gi	31Gi	67Gi	139Gi
Total memory requests if using the ruler	None	18Gi	35Gi	83Gi	171Gi
Total disk requests	40Gi	590Gi	430Gi	430Gi	590Gi
Total disk requests if using the ruler	80Gi	910Gi	750Gi	750Gi	910Gi

3.4.2. Prerequisites

You have installed the Loki Operator by using the CLI or web console.
You have a serviceAccount in the same namespace in which you create the ClusterLogForwarder.
The serviceAccount is assigned collect-audit-logs, collect-application-logs, and collect-infrastructure-logs cluster roles.

3.4.3. Core Setup and Configuration

Role-based access controls, basic monitoring, and pod placement to deploy Loki.

3.4.4. Authorizing LokiStack rules RBAC permissions

The following cluster roles for alerting and recording rules are available for LokiStack:

Rule name	Description
`alertingrules.loki.grafana.com-v1-admin`	Users with this role have administrative-level access to manage alerting rules. This cluster role grants permissions to create, read, update, delete, list, and watch `AlertingRule` resources within the `loki.grafana.com/v1` API group.
`alertingrules.loki.grafana.com-v1-crdview`	Users with this role can view the definitions of Custom Resource Definitions (CRDs) related to `AlertingRule` resources within the `loki.grafana.com/v1` API group, but do not have permissions for modifying or managing these resources.
`alertingrules.loki.grafana.com-v1-edit`	Users with this role have permission to create, update, and delete `AlertingRule` resources.
`alertingrules.loki.grafana.com-v1-view`	Users with this role can read `AlertingRule` resources within the `loki.grafana.com/v1` API group. They can inspect configurations, labels, and annotations for existing alerting rules but cannot make any modifications to them.
`recordingrules.loki.grafana.com-v1-admin`	Users with this role have administrative-level access to manage recording rules. This cluster role grants permissions to create, read, update, delete, list, and watch `RecordingRule` resources within the `loki.grafana.com/v1` API group.
`recordingrules.loki.grafana.com-v1-crdview`	Users with this role can view the definitions of Custom Resource Definitions (CRDs) related to `RecordingRule` resources within the `loki.grafana.com/v1` API group, but do not have permissions for modifying or managing these resources.
`recordingrules.loki.grafana.com-v1-edit`	Users with this role have permission to create, update, and delete `RecordingRule` resources.
`recordingrules.loki.grafana.com-v1-view`	Users with this role can read `RecordingRule` resources within the `loki.grafana.com/v1` API group. They can inspect configurations, labels, and annotations for existing alerting rules but cannot make any modifications to them.

3.4.4.1. Examples

To apply cluster roles for a user, you must bind an existing cluster role to a specific username.

The following example command gives the specified user create, read, update and delete (CRUD) permissions for alerting rules in a specific namespace in the cluster:

Example cluster role binding command for alerting rule CRUD permissions in a specific namespace

$ oc adm policy add-role-to-user alertingrules.loki.grafana.com-v1-admin -n <namespace> <username>

The following command gives the specified user administrator permissions for alerting rules in all namespaces:

Example cluster role binding command for administrator permissions

$ oc adm policy add-cluster-role-to-user alertingrules.loki.grafana.com-v1-admin <username>

3.4.5. Creating a log-based alerting rule with Loki

If an AlertingRule CR includes an invalid interval period, it is an invalid alerting rule
If an AlertingRule CR includes an invalid for period, it is an invalid alerting rule.
If an AlertingRule CR includes an invalid LogQL expr, it is an invalid alerting rule.
If an AlertingRule CR includes two groups with the same name, it is an invalid alerting rule.
If none of the above applies, an alerting rule is considered valid.

Table 3.2. AlertingRule definitions
Tenant type	Valid namespaces for `AlertingRule` CRs
application	`<your_application_namespace>`
audit	`openshift-logging`
infrastructure	`openshift-/`, `kube-/\`, `default`

Procedure

Create an AlertingRule custom resource (CR):

Example infrastructure AlertingRule CR

  apiVersion: loki.grafana.com/v1
  kind: AlertingRule
  metadata:
    name: loki-operator-alerts
    namespace: openshift-operators-redhat 1
    labels: 2
      openshift.io/<label_name>: "true"
  spec:
    tenantID: "infrastructure" 3
    groups:
      - name: LokiOperatorHighReconciliationError
        rules:
          - alert: HighPercentageError
            expr: | 4
              sum(rate({kubernetes_namespace_name="openshift-operators-redhat", kubernetes_pod_name=~"loki-operator-controller-manager.*"} |= "error" [1m])) by (job)
                /
              sum(rate({kubernetes_namespace_name="openshift-operators-redhat", kubernetes_pod_name=~"loki-operator-controller-manager.*"}[1m])) by (job)
                > 0.01
            for: 10s
            labels:
              severity: critical 5
            annotations:
              summary: High Loki Operator Reconciliation Errors 6
              description: High Loki Operator Reconciliation Errors 7

1: The namespace where this AlertingRule CR is created must have a label matching the LokiStack spec.rules.namespaceSelector definition.
2: The labels block must match the LokiStack spec.rules.selector definition.
3: AlertingRule CRs for infrastructure tenants are only supported in the openshift-*, kube-\*, or default namespaces.
4: The value for kubernetes_namespace_name: must match the value for metadata.namespace.
5: The value of this mandatory field must be critical, warning, or info.
6: This field is mandatory.
7: This field is mandatory.

Example application AlertingRule CR

  apiVersion: loki.grafana.com/v1
  kind: AlertingRule
  metadata:
    name: app-user-workload
    namespace: app-ns 1
    labels: 2
      openshift.io/<label_name>: "true"
  spec:
    tenantID: "application"
    groups:
      - name: AppUserWorkloadHighError
        rules:
          - alert:
            expr: | 3
              sum(rate({kubernetes_namespace_name="app-ns", kubernetes_pod_name=~"podName.*"} |= "error" [1m])) by (job)
            for: 10s
            labels:
              severity: critical 4
            annotations:
              summary:  5
              description:  6

1: The namespace where this AlertingRule CR is created must have a label matching the LokiStack spec.rules.namespaceSelector definition.
2: The labels block must match the LokiStack spec.rules.selector definition.
3: Value for kubernetes_namespace_name: must match the value for metadata.namespace.
4: The value of this mandatory field must be critical, warning, or info.
5: The value of this mandatory field is a summary of the rule.
6: The value of this mandatory field is a detailed description of the rule.

Apply the AlertingRule CR:
```
$ oc apply -f <filename>.yaml
```

3.4.6. Configuring Loki to tolerate memberlist creation failure

$ oc patch LokiStack logging-loki -n openshift-logging  --type=merge -p '{"spec": {"hashRing":{"memberlist":{"instanceAddrType":"podIP"},"type":"memberlist"}}}'

Example LokiStack to include podIP

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  hashRing:
    type: memberlist
    memberlist:
      instanceAddrType: podIP
# ...

3.4.7. Enabling stream-based retention with Loki

You can configure retention policies based on log streams. Rules for these may be set globally, per-tenant, or both. If you configure both, tenant rules apply before global rules.

Important

Note

Schema v13 is recommended.

Procedure

Create a LokiStack CR:

Enable stream-based retention globally as shown in the following example:

Example global stream-based retention for AWS

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
   global: 1
      retention: 2
        days: 20
        streams:
        - days: 4
          priority: 1
          selector: '{kubernetes_namespace_name=~"test.+"}' 3
        - days: 1
          priority: 1
          selector: '{log_type="infrastructure"}'
  managementState: Managed
  replicationFactor: 1
  size: 1x.small
  storage:
    schemas:
    - effectiveDate: "2020-10-11"
      version: v13
    secret:
      name: logging-loki-s3
      type: aws
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

1: Sets retention policy for all log streams. Note: This field does not impact the retention period for stored logs in object storage.
2: Retention is enabled in the cluster when this block is added to the CR.
3: Contains the LogQL query used to define the log stream.spec: limits:

Enable stream-based retention per-tenant basis as shown in the following example:

Example per-tenant stream-based retention for AWS

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
    global:
      retention:
        days: 20
    tenants: 1
      application:
        retention:
          days: 1
          streams:
            - days: 4
              selector: '{kubernetes_namespace_name=~"test.+"}' 2
      infrastructure:
        retention:
          days: 5
          streams:
            - days: 1
              selector: '{kubernetes_namespace_name=~"openshift-cluster.+"}'
  managementState: Managed
  replicationFactor: 1
  size: 1x.small
  storage:
    schemas:
    - effectiveDate: "2020-10-11"
      version: v13
    secret:
      name: logging-loki-s3
      type: aws
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

1: Sets retention policy by tenant. Valid tenant types are application, audit, and infrastructure.
2: Contains the LogQL query used to define the log stream.

Apply the LokiStack CR:
```
$ oc apply -f <filename>.yaml
```

3.4.8. Loki pod placement

You can control which nodes the Loki pods run on, and prevent other workloads from using those nodes, by using tolerations or node selectors on the pods.

Example LokiStack with node selectors

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor: 1
      nodeSelector:
        node-role.kubernetes.io/infra: "" 2
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
# ...

1: Specifies the component pod type that applies to the node selector.
2: Specifies the pods that are moved to nodes containing the defined label.

Example LokiStack CR with node selectors and tolerations

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
# ...

To configure the nodeSelector and tolerations fields of the LokiStack (CR), you can use the oc explain command to view the description and fields for a particular resource:

$ oc explain lokistack.spec.template

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: template <Object>

DESCRIPTION:
     Template defines the resource/limits/tolerations/nodeselectors per
     component

FIELDS:
   compactor	<Object>
     Compactor defines the compaction component spec.

   distributor	<Object>
     Distributor defines the distributor component spec.
...

For more detailed information, you can add a specific field:

$ oc explain lokistack.spec.template.compactor

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: compactor <Object>

DESCRIPTION:
     Compactor defines the compaction component spec.

FIELDS:
   nodeSelector	<map[string]string>
     NodeSelector defines the labels required by a node to schedule the
     component onto it.
...

3.4.8.1. Enhanced Reliability and Performance

Configurations to ensure Loki’s reliability and efficiency in production.

3.4.8.2. Enabling authentication to cloud-based log stores using short-lived tokens

Workload identity federation enables authentication to cloud-based log stores using short-lived tokens.

Procedure

Use one of the following options to enable authentication:

If you use the OpenShift Container Platform web console to install the Loki Operator, clusters that use short-lived tokens are automatically detected. You are prompted to create roles and supply the data required for the Loki Operator to create a CredentialsRequest object, which populates a secret.

Example Azure sample subscription

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat
spec:
  channel: "stable-6.0"
  installPlanApproval: Manual
  name: loki-operator
  source: redhat-operators
  sourceNamespace: openshift-marketplace
  config:
    env:
      - name: CLIENTID
        value: <your_client_id>
      - name: TENANTID
        value: <your_tenant_id>
      - name: SUBSCRIPTIONID
        value: <your_subscription_id>
      - name: REGION
        value: <your_region>

Example AWS sample subscription

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat
spec:
  channel: "stable-6.0"
  installPlanApproval: Manual
  name: loki-operator
  source: redhat-operators
  sourceNamespace: openshift-marketplace
  config:
    env:
    - name: ROLEARN
      value: <role_ARN>

3.4.8.3. Configuring Loki to tolerate node failure

The Loki Operator supports setting pod anti-affinity rules to request that pods of the same component are scheduled on different available nodes in the cluster.

Affinity is a property of pods that controls the nodes on which they prefer to be scheduled. Anti-affinity is a property of pods that prevents a pod from being scheduled on a node.

In OpenShift Container Platform, pod affinity and pod anti-affinity allow you to constrain which nodes your pod is eligible to be scheduled on based on the key-value labels on other pods.

You can override the preferred podAntiAffinity settings for Loki components by configuring required settings in the requiredDuringSchedulingIgnoredDuringExecution field:

Example user settings for the ingester component

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    ingester:
      podAntiAffinity:
      # ...
        requiredDuringSchedulingIgnoredDuringExecution: 1
        - labelSelector:
            matchLabels: 2
              app.kubernetes.io/component: ingester
          topologyKey: kubernetes.io/hostname
# ...

1: The stanza to define a required rule.
2: The key-value pair (label) that must be matched to apply the rule.

3.4.8.4. LokiStack behavior during cluster restarts

3.4.8.5. Advanced Deployment and Scalability

Specialized configurations for high availability, scalability, and error handling.

3.4.8.6. Zone aware data replication

Example LokiStack CR with zone replication enabled

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
 name: logging-loki
 namespace: openshift-logging
spec:
 replicationFactor: 2 1
 replication:
   factor: 2 2
   zones:
   -  maxSkew: 1 3
      topologyKey: topology.kubernetes.io/zone 4

1: Deprecated field, values entered are overwritten by replication.factor.
2: This value is automatically set when deployment size is selected at setup.
3: The maximum difference in number of pods between any two topology domains. The default is 1, and you cannot specify a value of 0.
4: Defines zones in the form of a topology key that corresponds to a node label.

3.4.8.7. Recovering Loki pods from failed zones

Warning

Prerequisites

Verify your LokiStack CR has a replication factor greater than 1.
Zone failure detected by the control plane, and nodes in the failed zone are marked by cloud provider integration.

Procedure

List the pods in Pending status by running the following command:

$ oc get pods --field-selector status.phase==Pending -n openshift-logging

Example oc get pods output

NAME                           READY   STATUS    RESTARTS   AGE 1
logging-loki-index-gateway-1   0/1     Pending   0          17m
logging-loki-ingester-1        0/1     Pending   0          16m
logging-loki-ruler-1           0/1     Pending   0          16m

1: These pods are in Pending status because their corresponding PVCs are in the failed zone.

List the PVCs in Pending status by running the following command:

$ oc get pvc -o=json -n openshift-logging | jq '.items[] | select(.status.phase == "Pending") | .metadata.name' -r

Example oc get pvc output

storage-logging-loki-index-gateway-1
storage-logging-loki-ingester-1
wal-logging-loki-ingester-1
storage-logging-loki-ruler-1
wal-logging-loki-ruler-1

Delete the PVC(s) for a pod by running the following command:
```
$ oc delete pvc <pvc_name>  -n openshift-logging
```
Delete the pod(s) by running the following command:
```
$ oc delete pod <pod_name>  -n openshift-logging
```
Once these objects have been successfully deleted, they should automatically be rescheduled in an available zone.

3.4.8.7.1. Troubleshooting PVC in a terminating state

Remove the finalizer for each PVC by running the command below, then retry deletion.

$ oc patch pvc <pvc_name> -p '{"metadata":{"finalizers":null}}' -n openshift-logging

3.4.8.8. Troubleshooting Loki rate limit errors

If the Log Forwarder API forwards a large block of messages that exceeds the rate limit to Loki, Loki generates rate limit (429) errors.

In cases where the rate limit errors continue to occur, you can fix the issue by modifying the LokiStack custom resource (CR).

Important

The LokiStack CR is not available on Grafana-hosted Loki. This topic does not apply to Grafana-hosted Loki servers.

Conditions

The Log Forwarder API is configured to forward logs to Loki.

Your system sends a block of messages that is larger than 2 MB to Loki. For example:

"values":[["1630410392689800468","{\"kind\":\"Event\",\"apiVersion\":\
.......
......
......
......
\"received_at\":\"2021-08-31T11:46:32.800278+00:00\",\"version\":\"1.7.4 1.6.0\"}},\"@timestamp\":\"2021-08-31T11:46:32.799692+00:00\",\"viaq_index_name\":\"audit-write\",\"viaq_msg_id\":\"MzFjYjJkZjItNjY0MC00YWU4LWIwMTEtNGNmM2E5ZmViMGU4\",\"log_type\":\"audit\"}"]]}]}

After you enter oc logs -n openshift-logging -l component=collector, the collector logs in your cluster show a line containing one of the following error messages:

429 Too Many Requests Ingestion rate limit exceeded

Example Vector error message

2023-08-25T16:08:49.301780Z  WARN sink{component_kind="sink" component_id=default_loki_infra component_type=loki component_name=default_loki_infra}: vector::sinks::util::retries: Retrying after error. error=Server responded with an error: 429 Too Many Requests internal_log_rate_limit=true

Example Fluentd error message

2023-08-30 14:52:15 +0000 [warn]: [default_loki_infra] failed to flush the buffer. retry_times=2 next_retry_time=2023-08-30 14:52:19 +0000 chunk="604251225bf5378ed1567231a1c03b8b" error_class=Fluent::Plugin::LokiOutput::LogPostError error="429 Too Many Requests Ingestion rate limit exceeded for user infrastructure (limit: 4194304 bytes/sec) while attempting to ingest '4082' lines totaling '7820025' bytes, reduce log volume or contact your Loki administrator to see if the limit can be increased\n"

The error is also visible on the receiving end. For example, in the LokiStack ingester pod:

Example Loki ingester error message

level=warn ts=2023-08-30T14:57:34.155592243Z caller=grpc_logging.go:43 duration=1.434942ms method=/logproto.Pusher/Push err="rpc error: code = Code(429) desc = entry with timestamp 2023-08-30 14:57:32.012778399 +0000 UTC ignored, reason: 'Per stream rate limit exceeded (limit: 3MB/sec) while attempting to ingest for stream

Procedure

Update the ingestionBurstSize and ingestionRate fields in the LokiStack CR:
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
    global:
      ingestion:
        ingestionBurstSize: 16 1
        ingestionRate: 8 2
# ...
```
1
The ingestionBurstSize field defines the maximum local rate-limited sample size per distributor replica in MB. This value is a hard limit. Set this value to at least the maximum logs size expected in a single push request. Single requests that are larger than the ingestionBurstSize value are not permitted.
2
The ingestionRate field is a soft limit on the maximum amount of ingested samples per second in MB. Rate limit errors occur if the rate of logs exceeds the limit, but the collector retries sending the logs. As long as the total average is lower than the limit, the system recovers and errors are resolved without user intervention.

3.5. OTLP data ingestion in Loki

Logging 6.1 enables an API endpoint using the OpenTelemetry Protocol (OTLP). As OTLP is a standardized format not specifically designed for Loki, it requires additional configuration on Loki’s side to map OpenTelemetry’s data format to Loki’s data model. OTLP lacks concepts such as stream labels or structured metadata. Instead, OTLP provides metadata about log entries as attributes, grouped into three categories:

Resource
Scope
Log

This allows metadata to be set for multiple entries simultaneously or individually as needed.

3.5.1. Configuring LokiStack for OTLP data ingestion

Important

For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope.

To configure a LokiStack custom resource (CR) for OTLP ingestion, follow these steps:

Prerequisites

Ensure that your Loki setup supports structured metadata, introduced in schema version 13 to enable OTLP log ingestion.

Procedure

Set the schema version:
- When creating a new LokiStack CR, set version: v13 in the storage schema configuration.
  Note
  For existing configurations, add a new schema entry with version: v13 and an effectiveDate in the future. For more information on updating schema versions, see Upgrading Schemas (Grafana documentation).
Configure the storage schema as follows:
Example configure storage schema
```
# ...
spec:
  storage:
    schemas:
    - version: v13
      effectiveDate: 2024-10-25
```
Once the effectiveDate has passed, the v13 schema takes effect, enabling your LokiStack to store structured metadata.

3.5.2. Attribute mapping

When the Loki Operator is set to openshift-logging mode, it automatically applies a default set of attribute mappings. These mappings align specific OTLP attributes with Loki’s stream labels and structured metadata.

For typical setups, these default mappings should be sufficient. However, you might need to customize attribute mapping in the following cases:

Using a custom Collector: If your setup includes a custom collector that generates additional attributes, consider customizing the mapping to ensure these attributes are retained in Loki.
Adjusting attribute detail levels: If the default attribute set is more detailed than necessary, you can reduce it to essential attributes only. This can avoid excessive data storage and streamline the logging process.

Important

Attributes that are not mapped to either stream labels or structured metadata are not stored in Loki.

3.5.2.1. Custom attribute mapping for OpenShift

When using the Loki Operator in openshift-logging mode, attribute mapping follow OpenShift defaults, but custom mappings can be configured to adjust these. Custom mappings allow further configurations to meet specific needs.

In openshift-logging mode, custom attribute mappings can be configured globally for all tenants or for individual tenants as needed. When custom mappings are defined, they are appended to the OpenShift defaults. If default recommended labels are not required, they can be disabled in the tenant configuration.

Note

A major difference between the Loki Operator and Loki itself lies in inheritance handling. Loki only copies default_resource_attributes_as_index_labels to tenants by default, while the Loki Operator applies the entire global configuration to each tenant in openshift-logging mode.

Within LokiStack, attribute mapping configuration is managed through the limits setting:

# ...
spec:
  limits:
    global:
      otlp: {} 1
    tenants:
      application:
        otlp: {} 2

1: Global OTLP attribute configuration.
2: OTLP attribute configuration for the application tenant within openshift-logging mode.

Note

Both global and per-tenant OTLP configurations can map attributes to stream labels or structured metadata. At least one stream label is required to save a log entry to Loki storage, so ensure this configuration meets that requirement.

Stream labels derive only from resource-level attributes, which the LokiStack resource structure reflects:

spec:
  limits:
    global:
      otlp:
        streamLabels:
          resourceAttributes:
          - name: "k8s.namespace.name"
          - name: "k8s.pod.name"
          - name: "k8s.container.name"

Structured metadata, in contrast, can be generated from resource, scope or log-level attributes:

# ...
spec:
  limits:
    global:
      otlp:
        streamLabels:
          # ...
        structuredMetadata:
          resourceAttributes:
          - name: "process.command_line"
          - name: "k8s\\.pod\\.labels\\..+"
            regex: true
          scopeAttributes:
          - name: "service.name"
          logAttributes:
          - name: "http.route"

Tip

Use regular expressions by setting regex: true for attributes names when mapping similar attributes in Loki.

Important

Avoid using regular expressions for stream labels, as this can increase data volume.

3.5.2.2. Customizing OpenShift defaults

In openshift-logging mode, certain attributes are required and cannot be removed from the configuration due to their role in OpenShift functions. Other attributes, labeled recommended, might be disabled if performance is impacted.

When using the openshift-logging mode without custom attributes, you can achieve immediate compatibility with OpenShift tools. If additional attributes are needed as stream labels or structured metadata, use custom configuration. Custom configurations can merge with default configurations.

3.5.2.3. Removing recommended attributes

To reduce default attributes in openshift-logging mode, disable recommended attributes:

# ...
spec:
  tenants:
    mode: openshift-logging
    openshift:
      otlp:
        disableRecommendedAttributes: true 1

1: Set disableRecommendedAttributes: true to remove recommended attributes, which limits default attributes to the required attributes.

Note

This option is beneficial if the default attributes causes performance or storage issues. This setting might negatively impact query performance, as it removes default stream labels. You should pair this option with a custom attribute configuration to retain attributes essential for queries.

3.5.3. Additional resources

3.6. OpenTelemetry data model

This document outlines the protocol and semantic conventions for Red Hat OpenShift Logging’s OpenTelemetry support with Logging 6.1.

Important

For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope.

3.6.1. Forwarding and ingestion protocol

Red Hat OpenShift Logging collects and forwards logs to OpenTelemetry endpoints using OTLP Specification. OTLP encodes, transports, and delivers telemetry data. You can also deploy Loki storage, which provides an OTLP endpont to ingest log streams. This document defines the semantic conventions for the logs collected from various OpenShift cluster sources.

3.6.2. Semantic conventions

The log collector in this solution gathers the following log streams:

Container logs
Cluster node journal logs
Cluster node auditd logs
Kubernetes and OpenShift API server logs
OpenShift Virtual Network (OVN) logs

You can forward these streams according to the semantic conventions defined by OpenTelemetry semantic attributes. The semantic conventions in OpenTelemetry define a resource as an immutable representation of the entity producing telemetry, identified by attributes. For example, a process running in a container includes attributes such as container_name, cluster_id, pod_name, namespace, and possibly deployment or app_name. These attributes are grouped under the resource object, which helps reduce repetition and optimizes log transmission as telemetry data.

In addition to resource attributes, logs might also contain scope attributes specific to instrumentation libraries and log attributes specific to each log entry. These attributes provide greater detail about each log entry and enhance filtering capabilities when querying logs in storage.

The following sections define the attributes that are generally forwarded.

3.6.2.1. Log entry structure

All log streams include the following log data fields:

The Applicable Sources column indicates which log sources each field applies to:

all: This field is present in all logs.
container: This field is present in Kubernetes container logs, both application and infrastructure.
audit: This field is present in Kubernetes, OpenShift API, and OVN logs.
auditd: This field is present in node auditd logs.
journal: This field is present in node journal logs.

Name	Applicable Sources	Comment
`body`	all
`observedTimeUnixNano`	all
`timeUnixNano`	all
`severityText`	container, journal
`attributes`	all	(Optional) Present when forwarding stream specific attributes

3.6.2.2. Attributes

Log entries include a set of resource, scope, and log attributes based on their source, as described in the following table.

The Location column specifies the type of attribute:

resource: Indicates a resource attribute
scope: Indicates a scope attribute
log: Indicates a log attribute

The Storage column indicates whether the attribute is stored in a LokiStack using the default openshift-logging mode and specifies where the attribute is stored:

stream label:
- Enables efficient filtering and querying based on specific labels.
- Can be labeled as required if the Loki Operator enforces this attribute in the configuration.
structured metadata:
- Allows for detailed filtering and storage of key-value pairs.
- Enables users to use direct labels for streamlined queries without requiring JSON parsing.

With OTLP, users can filter queries directly by labels rather than using JSON parsing, improving the speed and efficiency of queries.

Name	Location	Applicable Sources	Storage (LokiStack)	Comment
`log_source`	resource	all	required stream label	(DEPRECATED) Compatibility attribute, contains same information as `openshift.log.source`
`log_type`	resource	all	required stream label	(DEPRECATED) Compatibility attribute, contains same information as `openshift.log.type`
`kubernetes.container_name`	resource	container	stream label	(DEPRECATED) Compatibility attribute, contains same information as `k8s.container.name`
`kubernetes.host`	resource	all	stream label	(DEPRECATED) Compatibility attribute, contains same information as `k8s.node.name`
`kubernetes.namespace_name`	resource	container	required stream label	(DEPRECATED) Compatibility attribute, contains same information as `k8s.namespace.name`
`kubernetes.pod_name`	resource	container	stream label	(DEPRECATED) Compatibility attribute, contains same information as `k8s.pod.name`
`openshift.cluster_id`	resource	all		(DEPRECATED) Compatibility attribute, contains same information as `openshift.cluster.uid`
`level`	log	container, journal		(DEPRECATED) Compatibility attribute, contains same information as `severityText`
`openshift.cluster.uid`	resource	all	required stream label
`openshift.log.source`	resource	all	required stream label
`openshift.log.type`	resource	all	required stream label
`openshift.labels.*`	resource	all	structured metadata
`k8s.node.name`	resource	all	stream label
`k8s.namespace.name`	resource	container	required stream label
`k8s.container.name`	resource	container	stream label
`k8s.pod.labels.*`	resource	container	structured metadata
`k8s.pod.name`	resource	container	stream label
`k8s.pod.uid`	resource	container	structured metadata
`k8s.cronjob.name`	resource	container	stream label	Conditionally forwarded based on creator of pod
`k8s.daemonset.name`	resource	container	stream label	Conditionally forwarded based on creator of pod
`k8s.deployment.name`	resource	container	stream label	Conditionally forwarded based on creator of pod
`k8s.job.name`	resource	container	stream label	Conditionally forwarded based on creator of pod
`k8s.replicaset.name`	resource	container	structured metadata	Conditionally forwarded based on creator of pod
`k8s.statefulset.name`	resource	container	stream label	Conditionally forwarded based on creator of pod
`log.iostream`	log	container	structured metadata
`k8s.audit.event.level`	log	audit	structured metadata
`k8s.audit.event.stage`	log	audit	structured metadata
`k8s.audit.event.user_agent`	log	audit	structured metadata
`k8s.audit.event.request.uri`	log	audit	structured metadata
`k8s.audit.event.response.code`	log	audit	structured metadata
`k8s.audit.event.annotation.*`	log	audit	structured metadata
`k8s.audit.event.object_ref.resource`	log	audit	structured metadata
`k8s.audit.event.object_ref.name`	log	audit	structured metadata
`k8s.audit.event.object_ref.namespace`	log	audit	structured metadata
`k8s.audit.event.object_ref.api_group`	log	audit	structured metadata
`k8s.audit.event.object_ref.api_version`	log	audit	structured metadata
`k8s.user.username`	log	audit	structured metadata
`k8s.user.groups`	log	audit	structured metadata
`process.executable.name`	resource	journal	structured metadata
`process.executable.path`	resource	journal	structured metadata
`process.command_line`	resource	journal	structured metadata
`process.pid`	resource	journal	structured metadata
`service.name`	resource	journal	stream label
`systemd.t.*`	log	journal	structured metadata
`systemd.u.*`	log	journal	structured metadata

Note

Attributes marked as Compatibility attribute support minimal backward compatibility with the ViaQ data model. These attributes are deprecated and function as a compatibility layer to ensure continued UI functionality. These attributes will remain supported until the Logging UI fully supports the OpenTelemetry counterparts in future releases.

Loki changes the attribute names when persisting them to storage. The names will be lowercased, and all characters in the set: (.,/,-) will be replaced by underscores (_). For example, k8s.namespace.name will become k8s_namespace_name.

3.6.3. Additional resources

3.7. Visualization for logging

Visualization for logging is provided by deploying the Logging UI Plugin of the Cluster Observability Operator, which requires Operator installation.

Important

Chapter 4. Support

Only the configuration options described in this documentation are supported for logging.

Do not use any other configuration options, as they are unsupported. Configuration paradigms might change across OpenShift Container Platform releases, and such cases can only be handled gracefully if all configuration possibilities are controlled. If you use configurations other than those described in this documentation, your changes will be overwritten, because Operators are designed to reconcile any differences.

Note

If you must perform configurations not described in the OpenShift Container Platform documentation, you must set your Red Hat OpenShift Logging Operator to Unmanaged. An unmanaged logging instance is not supported and does not receive updates until you return its status to Managed.

Note

Important

Logging for Red Hat OpenShift is an opinionated collector and normalizer of application, infrastructure, and audit logs. It is intended to be used for forwarding logs to various supported systems.

Logging is not:

A high scale log collection system
Security Information and Event Monitoring (SIEM) compliant
Historical or long term log retention or storage
A guaranteed log sink
Secure storage - audit logs are not stored by default

4.1. Supported API custom resource definitions

LokiStack development is ongoing. Not all APIs are currently supported.

Table 4.1. Loki API support states
CustomResourceDefinition (CRD)	ApiVersion	Support state
LokiStack	lokistack.loki.grafana.com/v1	Supported in 5.5
RulerConfig	rulerconfig.loki.grafana/v1	Supported in 5.7
AlertingRule	alertingrule.loki.grafana/v1	Supported in 5.7
RecordingRule	recordingrule.loki.grafana/v1	Supported in 5.7

4.2. Unsupported configurations

You must set the Red Hat OpenShift Logging Operator to the Unmanaged state to modify the following components:

The Elasticsearch custom resource (CR)
The Kibana deployment
The fluent.conf file
The Fluentd daemon set

You must set the OpenShift Elasticsearch Operator to the Unmanaged state to modify the Elasticsearch deployment files.

Explicitly unsupported cases include:

Configuring default log rotation. You cannot modify the default log rotation configuration.
Configuring the collected log location. You cannot change the location of the log collector output file, which by default is /var/log/fluentd/fluentd.log.
Throttling log collection. You cannot throttle down the rate at which the logs are read in by the log collector.
Configuring the logging collector using environment variables. You cannot use environment variables to modify the log collector.
Configuring how the log collector normalizes logs. You cannot modify default log normalization.

4.3. Support policy for unmanaged Operators

The management state of an Operator determines whether an Operator is actively managing the resources for its related component in the cluster as designed. If an Operator is set to an unmanaged state, it does not respond to changes in configuration nor does it receive updates.

While this can be helpful in non-production clusters or during debugging, Operators in an unmanaged state are unsupported and the cluster administrator assumes full control of the individual component configurations and upgrades.

An Operator can be set to an unmanaged state using the following methods:

Individual Operator configuration
Individual Operators have a managementState parameter in their configuration. This can be accessed in different ways, depending on the Operator. For example, the Red Hat OpenShift Logging Operator accomplishes this by modifying a custom resource (CR) that it manages, while the Cluster Samples Operator uses a cluster-wide configuration resource.
Changing the managementState parameter to Unmanaged means that the Operator is not actively managing its resources and will take no action related to the related component. Some Operators might not support this management state as it might damage the cluster and require manual recovery.
Warning
Changing individual Operators to the Unmanaged state renders that particular component and functionality unsupported. Reported issues must be reproduced in Managed state for support to proceed.
Cluster Version Operator (CVO) overrides
The spec.overrides parameter can be added to the CVO’s configuration to allow administrators to provide a list of overrides to the CVO’s behavior for a component. Setting the spec.overrides[].unmanaged parameter to true for a component blocks cluster upgrades and alerts the administrator after a CVO override has been set:
```
Disabling ownership via cluster version overrides prevents upgrades. Please remove overrides before continuing.
```
Warning
Setting a CVO override puts the entire cluster in an unsupported state. Reported issues must be reproduced after removing any overrides for support to proceed.

4.4. Support exception for the Logging UI Plugin

4.5. Collecting logging data for Red Hat Support

When opening a support case, it is helpful to provide debugging information about your cluster to Red Hat Support.

You can use the must-gather tool to collect diagnostic information for project-level resources, cluster-level resources, and each of the logging components.

For prompt support, supply diagnostic information for both OpenShift Container Platform and logging.

Note

Do not use the hack/logging-dump.sh script. The script is no longer supported and does not collect data.

4.5.1. About the must-gather tool

The oc adm must-gather CLI command collects the information from your cluster that is most likely needed for debugging issues.

For your logging, must-gather collects the following information:

Project-level resources, including pods, configuration maps, service accounts, roles, role bindings, and events at the project level
Cluster-level resources, including nodes, roles, and role bindings at the cluster level
OpenShift Logging resources in the openshift-logging and openshift-operators-redhat namespaces, including health status for the log collector, the log store, and the log visualizer

When you run oc adm must-gather, a new pod is created on the cluster. The data is collected on that pod and saved in a new directory that starts with must-gather.local. This directory is created in the current working directory.

4.5.2. Collecting logging data

You can use the oc adm must-gather CLI command to collect information about logging.

Procedure

To collect logging information with must-gather:

Navigate to the directory where you want to store the must-gather information.
Run the oc adm must-gather command against the logging image:
```
$ oc adm must-gather --image=$(oc -n openshift-logging get deployment.apps/cluster-logging-operator -o jsonpath='{.spec.template.spec.containers[?(@.name == "cluster-logging-operator")].image}')
```
The must-gather tool creates a new directory that starts with must-gather.local within the current directory. For example: must-gather.local.4157245944708210408.
Create a compressed file from the must-gather directory that was just created. For example, on a computer that uses a Linux operating system, run the following command:
```
$ tar -cvaf must-gather.tar.gz must-gather.local.4157245944708210408
```
Attach the compressed file to your support case on the Red Hat Customer Portal.

Chapter 5. Troubleshooting logging

5.1. Viewing Logging status

You can view the status of the Red Hat OpenShift Logging Operator and other logging components.

5.1.1. Viewing the status of the Red Hat OpenShift Logging Operator

You can view the status of the Red Hat OpenShift Logging Operator.

Prerequisites

The Red Hat OpenShift Logging Operator and OpenShift Elasticsearch Operator are installed.

Procedure

Change to the openshift-logging project by running the following command:
```
$ oc project openshift-logging
```

Get the ClusterLogging instance status by running the following command:

$ oc get clusterlogging instance -o yaml

Example output

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
# ...
status:  1
  collection:
    logs:
      fluentdStatus:
        daemonSet: fluentd  2
        nodes:
          collector-2rhqp: ip-10-0-169-13.ec2.internal
          collector-6fgjh: ip-10-0-165-244.ec2.internal
          collector-6l2ff: ip-10-0-128-218.ec2.internal
          collector-54nx5: ip-10-0-139-30.ec2.internal
          collector-flpnn: ip-10-0-147-228.ec2.internal
          collector-n2frh: ip-10-0-157-45.ec2.internal
        pods:
          failed: []
          notReady: []
          ready:
          - collector-2rhqp
          - collector-54nx5
          - collector-6fgjh
          - collector-6l2ff
          - collector-flpnn
          - collector-n2frh
  logstore: 3
    elasticsearchStatus:
    - ShardAllocationEnabled:  all
      cluster:
        activePrimaryShards:    5
        activeShards:           5
        initializingShards:     0
        numDataNodes:           1
        numNodes:               1
        pendingTasks:           0
        relocatingShards:       0
        status:                 green
        unassignedShards:       0
      clusterName:             elasticsearch
      nodeConditions:
        elasticsearch-cdm-mkkdys93-1:
      nodeCount:  1
      pods:
        client:
          failed:
          notReady:
          ready:
          - elasticsearch-cdm-mkkdys93-1-7f7c6-mjm7c
        data:
          failed:
          notReady:
          ready:
          - elasticsearch-cdm-mkkdys93-1-7f7c6-mjm7c
        master:
          failed:
          notReady:
          ready:
          - elasticsearch-cdm-mkkdys93-1-7f7c6-mjm7c
visualization:  4
    kibanaStatus:
    - deployment: kibana
      pods:
        failed: []
        notReady: []
        ready:
        - kibana-7fb4fd4cc9-f2nls
      replicaSets:
      - kibana-7fb4fd4cc9
      replicas: 1

1: In the output, the cluster status fields appear in the status stanza.
2: Information on the Fluentd pods.
3: Information on the Elasticsearch pods, including Elasticsearch cluster health, green, yellow, or red.
4: Information on the Kibana pods.

5.1.1.1. Example condition messages

The following are examples of some condition messages from the Status.Nodes section of the ClusterLogging instance.

A status message similar to the following indicates a node has exceeded the configured low watermark and no shard will be allocated to this node:

Example output

  nodes:
  - conditions:
    - lastTransitionTime: 2019-03-15T15:57:22Z
      message: Disk storage usage for node is 27.5gb (36.74%). Shards will be not
        be allocated on this node.
      reason: Disk Watermark Low
      status: "True"
      type: NodeStorage
    deploymentName: example-elasticsearch-clientdatamaster-0-1
    upgradeStatus: {}

A status message similar to the following indicates a node has exceeded the configured high watermark and shards will be relocated to other nodes:

Example output

  nodes:
  - conditions:
    - lastTransitionTime: 2019-03-15T16:04:45Z
      message: Disk storage usage for node is 27.5gb (36.74%). Shards will be relocated
        from this node.
      reason: Disk Watermark High
      status: "True"
      type: NodeStorage
    deploymentName: cluster-logging-operator
    upgradeStatus: {}

A status message similar to the following indicates the Elasticsearch node selector in the CR does not match any nodes in the cluster:

Example output

    Elasticsearch Status:
      Shard Allocation Enabled:  shard allocation unknown
      Cluster:
        Active Primary Shards:  0
        Active Shards:          0
        Initializing Shards:    0
        Num Data Nodes:         0
        Num Nodes:              0
        Pending Tasks:          0
        Relocating Shards:      0
        Status:                 cluster health unknown
        Unassigned Shards:      0
      Cluster Name:             elasticsearch
      Node Conditions:
        elasticsearch-cdm-mkkdys93-1:
          Last Transition Time:  2019-06-26T03:37:32Z
          Message:               0/5 nodes are available: 5 node(s) didn't match node selector.
          Reason:                Unschedulable
          Status:                True
          Type:                  Unschedulable
        elasticsearch-cdm-mkkdys93-2:
      Node Count:  2
      Pods:
        Client:
          Failed:
          Not Ready:
            elasticsearch-cdm-mkkdys93-1-75dd69dccd-f7f49
            elasticsearch-cdm-mkkdys93-2-67c64f5f4c-n58vl
          Ready:
        Data:
          Failed:
          Not Ready:
            elasticsearch-cdm-mkkdys93-1-75dd69dccd-f7f49
            elasticsearch-cdm-mkkdys93-2-67c64f5f4c-n58vl
          Ready:
        Master:
          Failed:
          Not Ready:
            elasticsearch-cdm-mkkdys93-1-75dd69dccd-f7f49
            elasticsearch-cdm-mkkdys93-2-67c64f5f4c-n58vl
          Ready:

A status message similar to the following indicates that the requested PVC could not bind to PV:

Example output

      Node Conditions:
        elasticsearch-cdm-mkkdys93-1:
          Last Transition Time:  2019-06-26T03:37:32Z
          Message:               pod has unbound immediate PersistentVolumeClaims (repeated 5 times)
          Reason:                Unschedulable
          Status:                True
          Type:                  Unschedulable

A status message similar to the following indicates that the Fluentd pods cannot be scheduled because the node selector did not match any nodes:

Example output

Status:
  Collection:
    Logs:
      Fluentd Status:
        Daemon Set:  fluentd
        Nodes:
        Pods:
          Failed:
          Not Ready:
          Ready:

5.1.2. Viewing the status of logging components

You can view the status for a number of logging components.

Prerequisites

The Red Hat OpenShift Logging Operator and OpenShift Elasticsearch Operator are installed.

Procedure

Change to the openshift-logging project.
```
$ oc project openshift-logging
```

View the status of logging environment:

$ oc describe deployment cluster-logging-operator

Example output

Name:                   cluster-logging-operator

....

Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    NewReplicaSetAvailable

....

Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  62m   deployment-controller  Scaled up replica set cluster-logging-operator-574b8987df to 1----

View the status of the logging replica set:

Get the name of a replica set:

Example output

$ oc get replicaset

Example output

NAME                                      DESIRED   CURRENT   READY   AGE
cluster-logging-operator-574b8987df       1         1         1       159m
elasticsearch-cdm-uhr537yu-1-6869694fb    1         1         1       157m
elasticsearch-cdm-uhr537yu-2-857b6d676f   1         1         1       156m
elasticsearch-cdm-uhr537yu-3-5b6fdd8cfd   1         1         1       155m
kibana-5bd5544f87                         1         1         1       157m

Get the status of the replica set:

$ oc describe replicaset cluster-logging-operator-574b8987df

Example output

Name:           cluster-logging-operator-574b8987df

....

Replicas:       1 current / 1 desired
Pods Status:    1 Running / 0 Waiting / 0 Succeeded / 0 Failed

....

Events:
  Type    Reason            Age   From                   Message
  ----    ------            ----  ----                   -------
  Normal  SuccessfulCreate  66m   replicaset-controller  Created pod: cluster-logging-operator-574b8987df-qjhqv----

5.2. Troubleshooting log forwarding

5.2.1. Redeploying Fluentd pods

When you create a ClusterLogForwarder custom resource (CR), if the Red Hat OpenShift Logging Operator does not redeploy the Fluentd pods automatically, you can delete the Fluentd pods to force them to redeploy.

Prerequisites

You have created a ClusterLogForwarder custom resource (CR) object.

Procedure

Delete the Fluentd pods to force them to redeploy by running the following command:
```
$ oc delete pod --selector logging-infra=collector
```

5.2.2. Troubleshooting Loki rate limit errors

If the Log Forwarder API forwards a large block of messages that exceeds the rate limit to Loki, Loki generates rate limit (429) errors.

In cases where the rate limit errors continue to occur, you can fix the issue by modifying the LokiStack custom resource (CR).

Important

The LokiStack CR is not available on Grafana-hosted Loki. This topic does not apply to Grafana-hosted Loki servers.

Conditions

The Log Forwarder API is configured to forward logs to Loki.

Your system sends a block of messages that is larger than 2 MB to Loki. For example:

"values":[["1630410392689800468","{\"kind\":\"Event\",\"apiVersion\":\
.......
......
......
......
\"received_at\":\"2021-08-31T11:46:32.800278+00:00\",\"version\":\"1.7.4 1.6.0\"}},\"@timestamp\":\"2021-08-31T11:46:32.799692+00:00\",\"viaq_index_name\":\"audit-write\",\"viaq_msg_id\":\"MzFjYjJkZjItNjY0MC00YWU4LWIwMTEtNGNmM2E5ZmViMGU4\",\"log_type\":\"audit\"}"]]}]}

After you enter oc logs -n openshift-logging -l component=collector, the collector logs in your cluster show a line containing one of the following error messages:

429 Too Many Requests Ingestion rate limit exceeded

Example Vector error message

2023-08-25T16:08:49.301780Z  WARN sink{component_kind="sink" component_id=default_loki_infra component_type=loki component_name=default_loki_infra}: vector::sinks::util::retries: Retrying after error. error=Server responded with an error: 429 Too Many Requests internal_log_rate_limit=true

Example Fluentd error message

2023-08-30 14:52:15 +0000 [warn]: [default_loki_infra] failed to flush the buffer. retry_times=2 next_retry_time=2023-08-30 14:52:19 +0000 chunk="604251225bf5378ed1567231a1c03b8b" error_class=Fluent::Plugin::LokiOutput::LogPostError error="429 Too Many Requests Ingestion rate limit exceeded for user infrastructure (limit: 4194304 bytes/sec) while attempting to ingest '4082' lines totaling '7820025' bytes, reduce log volume or contact your Loki administrator to see if the limit can be increased\n"

The error is also visible on the receiving end. For example, in the LokiStack ingester pod:

Example Loki ingester error message

level=warn ts=2023-08-30T14:57:34.155592243Z caller=grpc_logging.go:43 duration=1.434942ms method=/logproto.Pusher/Push err="rpc error: code = Code(429) desc = entry with timestamp 2023-08-30 14:57:32.012778399 +0000 UTC ignored, reason: 'Per stream rate limit exceeded (limit: 3MB/sec) while attempting to ingest for stream

Procedure

Update the ingestionBurstSize and ingestionRate fields in the LokiStack CR:
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
    global:
      ingestion:
        ingestionBurstSize: 16 1
        ingestionRate: 8 2
# ...
```
1
The ingestionBurstSize field defines the maximum local rate-limited sample size per distributor replica in MB. This value is a hard limit. Set this value to at least the maximum logs size expected in a single push request. Single requests that are larger than the ingestionBurstSize value are not permitted.
2
The ingestionRate field is a soft limit on the maximum amount of ingested samples per second in MB. Rate limit errors occur if the rate of logs exceeds the limit, but the collector retries sending the logs. As long as the total average is lower than the limit, the system recovers and errors are resolved without user intervention.

5.3. Troubleshooting logging alerts

You can use the following procedures to troubleshoot logging alerts on your cluster.

5.3.1. Elasticsearch cluster health status is red

At least one primary shard and its replicas are not allocated to a node. Use the following procedure to troubleshoot this alert.

Tip

Some commands in this documentation reference an Elasticsearch pod by using a $ES_POD_NAME shell variable. If you want to copy and paste the commands directly from this documentation, you must set this variable to a value that is valid for your Elasticsearch cluster.

You can list the available Elasticsearch pods by running the following command:

$ oc -n openshift-logging get pods -l component=elasticsearch

Choose one of the pods listed and set the $ES_POD_NAME variable, by running the following command:

$ export ES_POD_NAME=<elasticsearch_pod_name>

You can now use the $ES_POD_NAME variable in commands.

Procedure

Check the Elasticsearch cluster health and verify that the cluster status is red by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME -- health
```

List the nodes that have joined the cluster by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cat/nodes?v

List the Elasticsearch pods and compare them with the nodes in the command output from the previous step, by running the following command:
```
$ oc -n openshift-logging get pods -l component=elasticsearch
```
If some of the Elasticsearch nodes have not joined the cluster, perform the following steps.
1. Confirm that Elasticsearch has an elected master node by running the following command and observing the output:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cat/master?v
```
2. Review the pod logs of the elected master node for issues by running the following command and observing the output:
```
$ oc logs <elasticsearch_master_pod_name> -c elasticsearch -n openshift-logging
```
3. Review the logs of nodes that have not joined the cluster for issues by running the following command and observing the output:
```
$ oc logs <elasticsearch_node_name> -c elasticsearch -n openshift-logging
```
If all the nodes have joined the cluster, check if the cluster is in the process of recovering by running the following command and observing the output:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cat/recovery?active_only=true
```
If there is no command output, the recovery process might be delayed or stalled by pending tasks.

Check if there are pending tasks by running the following command and observing the output:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- health | grep number_of_pending_tasks

If there are pending tasks, monitor their status. If their status changes and indicates that the cluster is recovering, continue waiting. The recovery time varies according to the size of the cluster and other factors. Otherwise, if the status of the pending tasks does not change, this indicates that the recovery has stalled.
If it seems like the recovery has stalled, check if the cluster.routing.allocation.enable value is set to none, by running the following command and observing the output:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cluster/settings?pretty
```

If the cluster.routing.allocation.enable value is set to none, set it to all, by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cluster/settings?pretty \
  -X PUT -d '{"persistent": {"cluster.routing.allocation.enable":"all"}}'

Check if any indices are still red by running the following command and observing the output:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cat/indices?v

If any indices are still red, try to clear them by performing the following steps.

Clear the cache by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_index_name>/_cache/clear?pretty

Increase the max allocation retries by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_index_name>/_settings?pretty \
  -X PUT -d '{"index.allocation.max_retries":10}'

Delete all the scroll items by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_search/scroll/_all -X DELETE

Increase the timeout by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_index_name>/_settings?pretty \
  -X PUT -d '{"index.unassigned.node_left.delayed_timeout":"10m"}'

If the preceding steps do not clear the red indices, delete the indices individually.

Identify the red index name by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cat/indices?v

Delete the red index by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_red_index_name> -X DELETE

If there are no red indices and the cluster status is red, check for a continuous heavy processing load on a data node.
1. Check if the Elasticsearch JVM Heap usage is high by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_nodes/stats?pretty
```
  In the command output, review the node_name.jvm.mem.heap_used_percent field to determine the JVM Heap usage.
2. Check for high CPU utilization. For more information about CPU utilitzation, see the OpenShift Container Platform "Reviewing monitoring dashboards" documentation.

Additional resources

5.3.2. Elasticsearch cluster health status is yellow

Replica shards for at least one primary shard are not allocated to nodes. Increase the node count by adjusting the nodeCount value in the ClusterLogging custom resource (CR).

Additional resources

Fix a red or yellow cluster status

5.3.3. Elasticsearch node disk low watermark reached

Elasticsearch does not allocate shards to nodes that reach the low watermark.

Tip

You can list the available Elasticsearch pods by running the following command:

$ oc -n openshift-logging get pods -l component=elasticsearch

Choose one of the pods listed and set the $ES_POD_NAME variable, by running the following command:

$ export ES_POD_NAME=<elasticsearch_pod_name>

You can now use the $ES_POD_NAME variable in commands.

Procedure

Identify the node on which Elasticsearch is deployed by running the following command:
```
$ oc -n openshift-logging get po -o wide
```

Check if there are unassigned shards by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cluster/health?pretty | grep unassigned_shards

If there are unassigned shards, check the disk space on each node, by running the following command:

$ for pod in `oc -n openshift-logging get po -l component=elasticsearch -o jsonpath='{.items[*].metadata.name}'`; \
  do echo $pod; oc -n openshift-logging exec -c elasticsearch $pod \
  -- df -h /elasticsearch/persistent; done

In the command output, check the Use column to determine the used disk percentage on that node.

Example output

elasticsearch-cdm-kcrsda6l-1-586cc95d4f-h8zq8
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme1n1     19G  522M   19G   3% /elasticsearch/persistent
elasticsearch-cdm-kcrsda6l-2-5b548fc7b-cwwk7
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme2n1     19G  522M   19G   3% /elasticsearch/persistent
elasticsearch-cdm-kcrsda6l-3-5dfc884d99-59tjw
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme3n1     19G  528M   19G   3% /elasticsearch/persistent

If the used disk percentage is above 85%, the node has exceeded the low watermark, and shards can no longer be allocated to this node.

To check the current redundancyPolicy, run the following command:
```
$ oc -n openshift-logging get es elasticsearch \
  -o jsonpath='{.spec.redundancyPolicy}'
```
If you are using a ClusterLogging resource on your cluster, run the following command:
```
$ oc -n openshift-logging get cl \
  -o jsonpath='{.items[*].spec.logStore.elasticsearch.redundancyPolicy}'
```
If the cluster redundancyPolicy value is higher than the SingleRedundancy value, set it to the SingleRedundancy value and save this change.
If the preceding steps do not fix the issue, delete the old indices.
1. Check the status of all indices on Elasticsearch by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME -- indices
```
2. Identify an old index that can be deleted.
3. Delete the index by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_index_name> -X DELETE
```

5.3.4. Elasticsearch node disk high watermark reached

Elasticsearch attempts to relocate shards away from a node that has reached the high watermark to a node with low disk usage that has not crossed any watermark threshold limits.

To allocate shards to a particular node, you must free up some space on that node. If increasing the disk space is not possible, try adding a new data node to the cluster, or decrease the total cluster redundancy policy.

Tip

You can list the available Elasticsearch pods by running the following command:

$ oc -n openshift-logging get pods -l component=elasticsearch

Choose one of the pods listed and set the $ES_POD_NAME variable, by running the following command:

$ export ES_POD_NAME=<elasticsearch_pod_name>

You can now use the $ES_POD_NAME variable in commands.

Procedure

Identify the node on which Elasticsearch is deployed by running the following command:
```
$ oc -n openshift-logging get po -o wide
```

Check the disk space on each node:

$ for pod in `oc -n openshift-logging get po -l component=elasticsearch -o jsonpath='{.items[*].metadata.name}'`; \
  do echo $pod; oc -n openshift-logging exec -c elasticsearch $pod \
  -- df -h /elasticsearch/persistent; done

Check if the cluster is rebalancing:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_cluster/health?pretty | grep relocating_shards
```
If the command output shows relocating shards, the high watermark has been exceeded. The default value of the high watermark is 90%.
Increase the disk space on all nodes. If increasing the disk space is not possible, try adding a new data node to the cluster, or decrease the total cluster redundancy policy.
To check the current redundancyPolicy, run the following command:
```
$ oc -n openshift-logging get es elasticsearch \
  -o jsonpath='{.spec.redundancyPolicy}'
```
If you are using a ClusterLogging resource on your cluster, run the following command:
```
$ oc -n openshift-logging get cl \
  -o jsonpath='{.items[*].spec.logStore.elasticsearch.redundancyPolicy}'
```
If the cluster redundancyPolicy value is higher than the SingleRedundancy value, set it to the SingleRedundancy value and save this change.
If the preceding steps do not fix the issue, delete the old indices.
1. Check the status of all indices on Elasticsearch by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME -- indices
```
2. Identify an old index that can be deleted.
3. Delete the index by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_index_name> -X DELETE
```

5.3.5. Elasticsearch node disk flood watermark reached

Elasticsearch enforces a read-only index block on every index that has both of these conditions:

One or more shards are allocated to the node.
One or more disks exceed the flood stage.

Use the following procedure to troubleshoot this alert.

Tip

You can list the available Elasticsearch pods by running the following command:

$ oc -n openshift-logging get pods -l component=elasticsearch

Choose one of the pods listed and set the $ES_POD_NAME variable, by running the following command:

$ export ES_POD_NAME=<elasticsearch_pod_name>

You can now use the $ES_POD_NAME variable in commands.

Procedure

Get the disk space of the Elasticsearch node:

$ for pod in `oc -n openshift-logging get po -l component=elasticsearch -o jsonpath='{.items[*].metadata.name}'`; \
  do echo $pod; oc -n openshift-logging exec -c elasticsearch $pod \
  -- df -h /elasticsearch/persistent; done

In the command output, check the Avail column to determine the free disk space on that node.

Example output

elasticsearch-cdm-kcrsda6l-1-586cc95d4f-h8zq8
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme1n1     19G  522M   19G   3% /elasticsearch/persistent
elasticsearch-cdm-kcrsda6l-2-5b548fc7b-cwwk7
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme2n1     19G  522M   19G   3% /elasticsearch/persistent
elasticsearch-cdm-kcrsda6l-3-5dfc884d99-59tjw
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme3n1     19G  528M   19G   3% /elasticsearch/persistent

Increase the disk space on all nodes. If increasing the disk space is not possible, try adding a new data node to the cluster, or decrease the total cluster redundancy policy.
To check the current redundancyPolicy, run the following command:
```
$ oc -n openshift-logging get es elasticsearch \
  -o jsonpath='{.spec.redundancyPolicy}'
```
If you are using a ClusterLogging resource on your cluster, run the following command:
```
$ oc -n openshift-logging get cl \
  -o jsonpath='{.items[*].spec.logStore.elasticsearch.redundancyPolicy}'
```
If the cluster redundancyPolicy value is higher than the SingleRedundancy value, set it to the SingleRedundancy value and save this change.
If the preceding steps do not fix the issue, delete the old indices.
1. Check the status of all indices on Elasticsearch by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME -- indices
```
2. Identify an old index that can be deleted.
3. Delete the index by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_index_name> -X DELETE
```

Continue freeing up and monitoring the disk space. After the used disk space drops below 90%, unblock writing to this node by running the following command:

$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=_all/_settings?pretty \
  -X PUT -d '{"index.blocks.read_only_allow_delete": null}'

5.3.6. Elasticsearch JVM heap usage is high

The Elasticsearch node Java virtual machine (JVM) heap memory used is above 75%. Consider increasing the heap size.

5.3.7. Aggregated logging system CPU is high

System CPU usage on the node is high. Check the CPU of the cluster node. Consider allocating more CPU resources to the node.

5.3.8. Elasticsearch process CPU is high

Elasticsearch process CPU usage on the node is high. Check the CPU of the cluster node. Consider allocating more CPU resources to the node.

5.3.9. Elasticsearch disk space is running low

Elasticsearch is predicted to run out of disk space within the next 6 hours based on current disk usage. Use the following procedure to troubleshoot this alert.

Procedure

Get the disk space of the Elasticsearch node:

$ for pod in `oc -n openshift-logging get po -l component=elasticsearch -o jsonpath='{.items[*].metadata.name}'`; \
  do echo $pod; oc -n openshift-logging exec -c elasticsearch $pod \
  -- df -h /elasticsearch/persistent; done

In the command output, check the Avail column to determine the free disk space on that node.

Example output

elasticsearch-cdm-kcrsda6l-1-586cc95d4f-h8zq8
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme1n1     19G  522M   19G   3% /elasticsearch/persistent
elasticsearch-cdm-kcrsda6l-2-5b548fc7b-cwwk7
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme2n1     19G  522M   19G   3% /elasticsearch/persistent
elasticsearch-cdm-kcrsda6l-3-5dfc884d99-59tjw
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme3n1     19G  528M   19G   3% /elasticsearch/persistent

Increase the disk space on all nodes. If increasing the disk space is not possible, try adding a new data node to the cluster, or decrease the total cluster redundancy policy.
To check the current redundancyPolicy, run the following command:
```
$ oc -n openshift-logging get es elasticsearch -o jsonpath='{.spec.redundancyPolicy}'
```
If you are using a ClusterLogging resource on your cluster, run the following command:
```
$ oc -n openshift-logging get cl \
  -o jsonpath='{.items[*].spec.logStore.elasticsearch.redundancyPolicy}'
```
If the cluster redundancyPolicy value is higher than the SingleRedundancy value, set it to the SingleRedundancy value and save this change.
If the preceding steps do not fix the issue, delete the old indices.
1. Check the status of all indices on Elasticsearch by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME -- indices
```
2. Identify an old index that can be deleted.
3. Delete the index by running the following command:
```
$ oc exec -n openshift-logging -c elasticsearch $ES_POD_NAME \
  -- es_util --query=<elasticsearch_index_name> -X DELETE
```

Additional resources

Fix a red or yellow cluster status

5.3.10. Elasticsearch FileDescriptor usage is high

Based on current usage trends, the predicted number of file descriptors on the node is insufficient. Check the value of max_file_descriptors for each node as described in the Elasticsearch File Descriptors documentation.

5.4. Viewing the status of the Elasticsearch log store

You can view the status of the OpenShift Elasticsearch Operator and for a number of Elasticsearch components.

5.4.1. Viewing the status of the Elasticsearch log store

You can view the status of the Elasticsearch log store.

Prerequisites

The Red Hat OpenShift Logging Operator and OpenShift Elasticsearch Operator are installed.

Procedure

Change to the openshift-logging project by running the following command:
```
$ oc project openshift-logging
```

To view the status:

Get the name of the Elasticsearch log store instance by running the following command:
```
$ oc get Elasticsearch
```
Example output
```
NAME            AGE
elasticsearch   5h9m
```

Get the Elasticsearch log store status by running the following command:

$ oc get Elasticsearch <Elasticsearch-instance> -o yaml

For example:

$ oc get Elasticsearch elasticsearch -n openshift-logging -o yaml

The output includes information similar to the following:

Example output

status: 1
  cluster: 2
    activePrimaryShards: 30
    activeShards: 60
    initializingShards: 0
    numDataNodes: 3
    numNodes: 3
    pendingTasks: 0
    relocatingShards: 0
    status: green
    unassignedShards: 0
  clusterHealth: ""
  conditions: [] 3
  nodes: 4
  - deploymentName: elasticsearch-cdm-zjf34ved-1
    upgradeStatus: {}
  - deploymentName: elasticsearch-cdm-zjf34ved-2
    upgradeStatus: {}
  - deploymentName: elasticsearch-cdm-zjf34ved-3
    upgradeStatus: {}
  pods: 5
    client:
      failed: []
      notReady: []
      ready:
      - elasticsearch-cdm-zjf34ved-1-6d7fbf844f-sn422
      - elasticsearch-cdm-zjf34ved-2-dfbd988bc-qkzjz
      - elasticsearch-cdm-zjf34ved-3-c8f566f7c-t7zkt
    data:
      failed: []
      notReady: []
      ready:
      - elasticsearch-cdm-zjf34ved-1-6d7fbf844f-sn422
      - elasticsearch-cdm-zjf34ved-2-dfbd988bc-qkzjz
      - elasticsearch-cdm-zjf34ved-3-c8f566f7c-t7zkt
    master:
      failed: []
      notReady: []
      ready:
      - elasticsearch-cdm-zjf34ved-1-6d7fbf844f-sn422
      - elasticsearch-cdm-zjf34ved-2-dfbd988bc-qkzjz
      - elasticsearch-cdm-zjf34ved-3-c8f566f7c-t7zkt
  shardAllocationEnabled: all

1

In the output, the cluster status fields appear in the status stanza.

2

The status of the Elasticsearch log store:

The number of active primary shards.
The number of active shards.
The number of shards that are initializing.
The number of Elasticsearch log store data nodes.
The total number of Elasticsearch log store nodes.
The number of pending tasks.
The Elasticsearch log store status: green, red, yellow.
The number of unassigned shards.

3

Any status conditions, if present. The Elasticsearch log store status indicates the reasons from the scheduler if a pod could not be placed. Any events related to the following conditions are shown:

Container Waiting for both the Elasticsearch log store and proxy containers.
Container Terminated for both the Elasticsearch log store and proxy containers.
Pod unschedulable. Also, a condition is shown for a number of issues; see Example condition messages.

4

The Elasticsearch log store nodes in the cluster, with upgradeStatus.

5

The Elasticsearch log store client, data, and master pods in the cluster, listed under failed, notReady, or ready state.

5.4.1.1. Example condition messages

The following are examples of some condition messages from the Status section of the Elasticsearch instance.

The following status message indicates that a node has exceeded the configured low watermark, and no shard will be allocated to this node.

status:
  nodes:
  - conditions:
    - lastTransitionTime: 2019-03-15T15:57:22Z
      message: Disk storage usage for node is 27.5gb (36.74%). Shards will be not
        be allocated on this node.
      reason: Disk Watermark Low
      status: "True"
      type: NodeStorage
    deploymentName: example-elasticsearch-cdm-0-1
    upgradeStatus: {}

The following status message indicates that a node has exceeded the configured high watermark, and shards will be relocated to other nodes.

status:
  nodes:
  - conditions:
    - lastTransitionTime: 2019-03-15T16:04:45Z
      message: Disk storage usage for node is 27.5gb (36.74%). Shards will be relocated
        from this node.
      reason: Disk Watermark High
      status: "True"
      type: NodeStorage
    deploymentName: example-elasticsearch-cdm-0-1
    upgradeStatus: {}

The following status message indicates that the Elasticsearch log store node selector in the custom resource (CR) does not match any nodes in the cluster:

status:
    nodes:
    - conditions:
      - lastTransitionTime: 2019-04-10T02:26:24Z
        message: '0/8 nodes are available: 8 node(s) didn''t match node selector.'
        reason: Unschedulable
        status: "True"
        type: Unschedulable

The following status message indicates that the Elasticsearch log store CR uses a non-existent persistent volume claim (PVC).

status:
   nodes:
   - conditions:
     - last Transition Time:  2019-04-10T05:55:51Z
       message:               pod has unbound immediate PersistentVolumeClaims (repeated 5 times)
       reason:                Unschedulable
       status:                True
       type:                  Unschedulable

The following status message indicates that your Elasticsearch log store cluster does not have enough nodes to support the redundancy policy.

status:
  clusterHealth: ""
  conditions:
  - lastTransitionTime: 2019-04-17T20:01:31Z
    message: Wrong RedundancyPolicy selected. Choose different RedundancyPolicy or
      add more nodes with data roles
    reason: Invalid Settings
    status: "True"
    type: InvalidRedundancy

This status message indicates your cluster has too many control plane nodes:

status:
  clusterHealth: green
  conditions:
    - lastTransitionTime: '2019-04-17T20:12:34Z'
      message: >-
        Invalid master nodes count. Please ensure there are no more than 3 total
        nodes with master roles
      reason: Invalid Settings
      status: 'True'
      type: InvalidMasters

The following status message indicates that Elasticsearch storage does not support the change you tried to make.

For example:

status:
  clusterHealth: green
  conditions:
    - lastTransitionTime: "2021-05-07T01:05:13Z"
      message: Changing the storage structure for a custom resource is not supported
      reason: StorageStructureChangeIgnored
      status: 'True'
      type: StorageStructureChangeIgnored

The reason and type fields specify the type of unsupported change:

StorageClassNameChangeIgnored: Unsupported change to the storage class name.
StorageSizeChangeIgnored: Unsupported change the storage size.
StorageStructureChangeIgnored: Unsupported change between ephemeral and persistent storage structures.
Important
If you try to configure the ClusterLogging CR to switch from ephemeral to persistent storage, the OpenShift Elasticsearch Operator creates a persistent volume claim (PVC) but does not create a persistent volume (PV). To clear the StorageStructureChangeIgnored status, you must revert the change to the ClusterLogging CR and delete the PVC.

5.4.2. Viewing the status of the log store components

You can view the status for a number of the log store components.

Elasticsearch indices

You can view the status of the Elasticsearch indices.

Get the name of an Elasticsearch pod:

$ oc get pods --selector component=elasticsearch -o name

Example output

pod/elasticsearch-cdm-1godmszn-1-6f8495-vp4lw
pod/elasticsearch-cdm-1godmszn-2-5769cf-9ms2n
pod/elasticsearch-cdm-1godmszn-3-f66f7d-zqkz7

Get the status of the indices:

$ oc exec elasticsearch-cdm-4vjor49p-2-6d4d7db474-q2w7z -- indices

Example output

Defaulting container name to elasticsearch.
Use 'oc describe pod/elasticsearch-cdm-4vjor49p-2-6d4d7db474-q2w7z -n openshift-logging' to see all of the containers in this pod.

green  open   infra-000002                                                     S4QANnf1QP6NgCegfnrnbQ   3   1     119926            0        157             78
green  open   audit-000001                                                     8_EQx77iQCSTzFOXtxRqFw   3   1          0            0          0              0
green  open   .security                                                        iDjscH7aSUGhIdq0LheLBQ   1   1          5            0          0              0
green  open   .kibana_-377444158_kubeadmin                                     yBywZ9GfSrKebz5gWBZbjw   3   1          1            0          0              0
green  open   infra-000001                                                     z6Dpe__ORgiopEpW6Yl44A   3   1     871000            0        874            436
green  open   app-000001                                                       hIrazQCeSISewG3c2VIvsQ   3   1       2453            0          3              1
green  open   .kibana_1                                                        JCitcBMSQxKOvIq6iQW6wg   1   1          0            0          0              0
green  open   .kibana_-1595131456_user1                                        gIYFIEGRRe-ka0W3okS-mQ   3   1          1            0          0              0

Log store pods

You can view the status of the pods that host the log store.

Get the name of a pod:

$ oc get pods --selector component=elasticsearch -o name

Example output

pod/elasticsearch-cdm-1godmszn-1-6f8495-vp4lw
pod/elasticsearch-cdm-1godmszn-2-5769cf-9ms2n
pod/elasticsearch-cdm-1godmszn-3-f66f7d-zqkz7

Get the status of a pod:

$ oc describe pod elasticsearch-cdm-1godmszn-1-6f8495-vp4lw

The output includes the following status information:

Example output

....
Status:             Running

....

Containers:
  elasticsearch:
    Container ID:   cri-o://b7d44e0a9ea486e27f47763f5bb4c39dfd2
    State:          Running
      Started:      Mon, 08 Jun 2020 10:17:56 -0400
    Ready:          True
    Restart Count:  0
    Readiness:  exec [/usr/share/elasticsearch/probe/readiness.sh] delay=10s timeout=30s period=5s #success=1 #failure=3

....

  proxy:
    Container ID:  cri-o://3f77032abaddbb1652c116278652908dc01860320b8a4e741d06894b2f8f9aa1
    State:          Running
      Started:      Mon, 08 Jun 2020 10:18:38 -0400
    Ready:          True
    Restart Count:  0

....

Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True

....

Events:          <none>

Log storage pod deployment configuration

You can view the status of the log store deployment configuration.

Get the name of a deployment configuration:

$ oc get deployment --selector component=elasticsearch -o name

Example output

deployment.extensions/elasticsearch-cdm-1gon-1
deployment.extensions/elasticsearch-cdm-1gon-2
deployment.extensions/elasticsearch-cdm-1gon-3

Get the deployment configuration status:

$ oc describe deployment elasticsearch-cdm-1gon-1

The output includes the following status information:

Example output

....
  Containers:
   elasticsearch:
    Image:      registry.redhat.io/openshift-logging/elasticsearch6-rhel8
    Readiness:  exec [/usr/share/elasticsearch/probe/readiness.sh] delay=10s timeout=30s period=5s #success=1 #failure=3

....

Conditions:
  Type           Status   Reason
  ----           ------   ------
  Progressing    Unknown  DeploymentPaused
  Available      True     MinimumReplicasAvailable

....

Events:          <none>

Log store replica set

You can view the status of the log store replica set.

Get the name of a replica set:

$ oc get replicaSet --selector component=elasticsearch -o name

replicaset.extensions/elasticsearch-cdm-1gon-1-6f8495
replicaset.extensions/elasticsearch-cdm-1gon-2-5769cf
replicaset.extensions/elasticsearch-cdm-1gon-3-f66f7d

Get the status of the replica set:

$ oc describe replicaSet elasticsearch-cdm-1gon-1-6f8495

The output includes the following status information:

Example output

....
  Containers:
   elasticsearch:
    Image:      registry.redhat.io/openshift-logging/elasticsearch6-rhel8@sha256:4265742c7cdd85359140e2d7d703e4311b6497eec7676957f455d6908e7b1c25
    Readiness:  exec [/usr/share/elasticsearch/probe/readiness.sh] delay=10s timeout=30s period=5s #success=1 #failure=3

....

Events:          <none>

5.4.3. Elasticsearch cluster status

A dashboard in the Observe section of the OpenShift Container Platform web console displays the status of the Elasticsearch cluster.

To get the status of the OpenShift Elasticsearch cluster, visit the dashboard in the Observe section of the OpenShift Container Platform web console at <cluster_url>/monitoring/dashboards/grafana-dashboard-cluster-logging.

Elasticsearch status fields

eo_elasticsearch_cr_cluster_management_state

Shows whether the Elasticsearch cluster is in a managed or unmanaged state. For example:

eo_elasticsearch_cr_cluster_management_state{state="managed"} 1
eo_elasticsearch_cr_cluster_management_state{state="unmanaged"} 0

eo_elasticsearch_cr_restart_total

Shows the number of times the Elasticsearch nodes have restarted for certificate restarts, rolling restarts, or scheduled restarts. For example:

eo_elasticsearch_cr_restart_total{reason="cert_restart"} 1
eo_elasticsearch_cr_restart_total{reason="rolling_restart"} 1
eo_elasticsearch_cr_restart_total{reason="scheduled_restart"} 3

es_index_namespaces_total

Shows the total number of Elasticsearch index namespaces. For example:

Total number of Namespaces.
es_index_namespaces_total 5

es_index_document_count

Shows the number of records for each namespace. For example:

es_index_document_count{namespace="namespace_1"} 25
es_index_document_count{namespace="namespace_2"} 10
es_index_document_count{namespace="namespace_3"} 5

The "Secret Elasticsearch fields are either missing or empty" message

If Elasticsearch is missing the admin-cert, admin-key, logging-es.crt, or logging-es.key files, the dashboard shows a status message similar to the following example:

message": "Secret \"elasticsearch\" fields are either missing or empty: [admin-cert, admin-key, logging-es.crt, logging-es.key]",
"reason": "Missing Required Secrets",

Chapter 6. About Logging

As a cluster administrator, you can deploy logging on an OpenShift Container Platform cluster, and use it to collect and aggregate node system audit logs, application container logs, and infrastructure logs. You can forward logs to your chosen log outputs, including on-cluster, Red Hat managed log storage. You can also visualize your log data in the OpenShift Container Platform web console, or the Kibana web console, depending on your deployed log storage solution.

Note

In OpenShift Container Platform 4.16, the Elasticsearch Operator is only supported for ServiceMesh, Tracing, and Kiali. This Operator is planned for removal from the OpenShift Operator Catalog in November 2025. The reason for removal is that the Elasticsearch Operator is no longer supported for log storage, and Kibana is no longer supported in OpenShift Container Platform 4.16 and later versions. For more information on lifecycle dates, see Platform Agnostic Operators.

OpenShift Container Platform cluster administrators can deploy logging by using Operators. For information, see Installing logging.

The Operators are responsible for deploying, upgrading, and maintaining logging. After the Operators are installed, you can create a ClusterLogging custom resource (CR) to schedule logging pods and other resources necessary to support logging. You can also create a ClusterLogForwarder CR to specify which logs are collected, how they are transformed, and where they are forwarded to.

Note

Because the internal OpenShift Container Platform Elasticsearch log store does not provide secure storage for audit logs, audit logs are not stored in the internal Elasticsearch instance by default. If you want to send the audit logs to the default internal Elasticsearch log store, for example to view the audit logs in Kibana, you must use the Log Forwarding API as described in Forward audit logs to the log store.

6.1. Logging architecture

The major components of the logging are:

Collector: The collector is a daemonset that deploys pods to each OpenShift Container Platform node. It collects log data from each node, transforms the data, and forwards it to configured outputs. You can use the Vector collector or the legacy Fluentd collector.
Note
Fluentd is deprecated and is planned to be removed in a future release. Red Hat provides bug fixes and support for this feature during the current release lifecycle, but this feature no longer receives enhancements. As an alternative to Fluentd, you can use Vector instead.
Log store: The log store stores log data for analysis and is the default output for the log forwarder. You can use the default LokiStack log store, the legacy Elasticsearch log store, or forward logs to additional external log stores.
Note
The Logging 5.9 release does not contain an updated version of the OpenShift Elasticsearch Operator. If you currently use the OpenShift Elasticsearch Operator released with Logging 5.8, it will continue to work with Logging until the EOL of Logging 5.8. As an alternative to using the OpenShift Elasticsearch Operator to manage the default log storage, you can use the Loki Operator. For more information on the Logging lifecycle dates, see Platform Agnostic Operators.
Visualization: You can use a UI component to view a visual representation of your log data. The UI provides a graphical interface to search, query, and view stored logs. The OpenShift Container Platform web console UI is provided by enabling the OpenShift Container Platform console plugin.
Note
The Kibana web console is now deprecated is planned to be removed in a future logging release.

Logging collects container logs and node logs. These are categorized into types:

Application logs: Container logs generated by user applications running in the cluster, except infrastructure container applications.
Infrastructure logs: Container logs generated by infrastructure namespaces: openshift*, kube*, or default, as well as journald messages from nodes.
Audit logs: Logs generated by auditd, the node audit system, which are stored in the /var/log/audit/audit.log file, and logs from the auditd, kube-apiserver, openshift-apiserver services, as well as the ovn project if enabled.

Additional resources

Log visualization with the web console

6.2. About deploying logging

Administrators can deploy the logging by using the OpenShift Container Platform web console or the OpenShift CLI (oc) to install the logging Operators. The Operators are responsible for deploying, upgrading, and maintaining the logging.

Administrators and application developers can view the logs of the projects for which they have view access.

6.2.1. Logging custom resources

You can configure your logging deployment with custom resource (CR) YAML files implemented by each Operator.

Red Hat OpenShift Logging Operator:

ClusterLogging (CL) - After the Operators are installed, you create a ClusterLogging custom resource (CR) to schedule logging pods and other resources necessary to support the logging. The ClusterLogging CR deploys the collector and forwarder, which currently are both implemented by a daemonset running on each node. The Red Hat OpenShift Logging Operator watches the ClusterLogging CR and adjusts the logging deployment accordingly.
ClusterLogForwarder (CLF) - Generates collector configuration to forward logs per user configuration.

Loki Operator:

LokiStack - Controls the Loki cluster as log store and the web proxy with OpenShift Container Platform authentication integration to enforce multi-tenancy.

OpenShift Elasticsearch Operator:

Note

These CRs are generated and managed by the OpenShift Elasticsearch Operator. Manual changes cannot be made without being overwritten by the Operator.

ElasticSearch - Configure and deploy an Elasticsearch instance as the default log store.
Kibana - Configure and deploy Kibana instance to search, query and view logs.

6.2.2. About JSON OpenShift Container Platform Logging

You can use JSON logging to configure the Log Forwarding API to parse JSON strings into a structured object. You can perform the following tasks:

Parse JSON logs
Configure JSON log data for Elasticsearch
Forward JSON logs to the Elasticsearch log store

6.2.3. About collecting and storing Kubernetes events

The OpenShift Container Platform Event Router is a pod that watches Kubernetes events and logs them for collection by OpenShift Container Platform Logging. You must manually deploy the Event Router.

For information, see About collecting and storing Kubernetes events.

6.2.4. About troubleshooting OpenShift Container Platform Logging

You can troubleshoot the logging issues by performing the following tasks:

Viewing logging status
Viewing the status of the log store
Understanding logging alerts
Collecting logging data for Red Hat Support
Troubleshooting for critical alerts

6.2.5. About exporting fields

The logging system exports fields. Exported fields are present in the log records and are available for searching from Elasticsearch and Kibana.

For information, see About exporting fields.

6.2.6. About event routing

The Event Router is a pod that watches OpenShift Container Platform events so they can be collected by logging. The Event Router collects events from all projects and writes them to STDOUT. Fluentd collects those events and forwards them into the OpenShift Container Platform Elasticsearch instance. Elasticsearch indexes the events to the infra index.

You must manually deploy the Event Router.

For information, see Collecting and storing Kubernetes events.

Chapter 7. Installing Logging

OpenShift Container Platform Operators use custom resources (CR) to manage applications and their components. High-level configuration and settings are provided by the user within a CR. The Operator translates high-level directives into low-level actions, based on best practices embedded within the Operator’s logic. A custom resource definition (CRD) defines a CR and lists all the configurations available to users of the Operator. Installing an Operator creates the CRDs, which are then used to generate CRs.

Important

You must install the Red Hat OpenShift Logging Operator after the log store Operator.

You deploy logging by installing the Loki Operator or OpenShift Elasticsearch Operator to manage your log store, followed by the Red Hat OpenShift Logging Operator to manage the components of logging. You can use either the OpenShift Container Platform web console or the OpenShift Container Platform CLI to install or configure logging.

Note

Tip

You can alternatively apply all example objects.

7.1. Installing Logging with Elasticsearch using the web console

You can use the OpenShift Container Platform web console to install the OpenShift Elasticsearch and Red Hat OpenShift Logging Operators. Elasticsearch is a memory-intensive application. By default, OpenShift Container Platform installs three Elasticsearch nodes with memory requests and limits of 16 GB. This initial set of three OpenShift Container Platform nodes might not have enough memory to run Elasticsearch within your cluster. If you experience memory issues that are related to Elasticsearch, add more Elasticsearch nodes to your cluster rather than increasing the memory on existing nodes.

Note

If you do not want to use the default Elasticsearch log store, you can remove the internal Elasticsearch logStore and Kibana visualization components from the ClusterLogging custom resource (CR). Removing these components is optional but saves resources.

Prerequisites

Ensure that you have the necessary persistent storage for Elasticsearch. Note that each Elasticsearch node requires its own storage volume.
Note
If you use a local volume for persistent storage, do not use a raw block volume, which is described with volumeMode: block in the LocalVolume object. Elasticsearch cannot use raw block volumes.

Procedure

To install the OpenShift Elasticsearch Operator and Red Hat OpenShift Logging Operator using the OpenShift Container Platform web console:

Install the OpenShift Elasticsearch Operator:
1. In the OpenShift Container Platform web console, click Operators → OperatorHub.
2. Choose OpenShift Elasticsearch Operator from the list of available Operators, and click Install.
3. Ensure that the All namespaces on the cluster is selected under Installation Mode.
4. Ensure that openshift-operators-redhat is selected under Installed Namespace.
  You must specify the openshift-operators-redhat namespace. The openshift-operators namespace might contain Community Operators, which are untrusted and could publish a metric with the same name as an OpenShift Container Platform metric, which would cause conflicts.
5. Select Enable Operator recommended cluster monitoring on this namespace.
  This option sets the openshift.io/cluster-monitoring: "true" label in the Namespace object. You must select this option to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
6. Select stable-5.y as the Update Channel.
  Note
  The stable channel only provides updates to the most recent release of logging. To continue receiving updates for prior releases, you must change your subscription channel to stable-x.y, where x.y represents the major and minor version of logging you have installed. For example, stable-5.7.
7. Select an Approval Strategy.
  - The Automatic strategy allows Operator Lifecycle Manager (OLM) to automatically update the Operator when a new version is available.
  - The Manual strategy requires a user with appropriate credentials to approve the Operator update.
8. Click Install.
9. Verify that the OpenShift Elasticsearch Operator installed by switching to the Operators → Installed Operators page.
10. Ensure that OpenShift Elasticsearch Operator is listed in all projects with a Status of Succeeded.
Install the Red Hat OpenShift Logging Operator:
1. In the OpenShift Container Platform web console, click Operators → OperatorHub.
2. Choose Red Hat OpenShift Logging from the list of available Operators, and click Install.
3. Ensure that the A specific namespace on the cluster is selected under Installation Mode.
4. Ensure that Operator recommended namespace is openshift-logging under Installed Namespace.
5. Select Enable Operator recommended cluster monitoring on this namespace.
  This option sets the openshift.io/cluster-monitoring: "true" label in the Namespace object. You must select this option to ensure that cluster monitoring scrapes the openshift-logging namespace.
6. Select stable-5.y as the Update Channel.
7. Select an Approval Strategy.
  - The Automatic strategy allows Operator Lifecycle Manager (OLM) to automatically update the Operator when a new version is available.
  - The Manual strategy requires a user with appropriate credentials to approve the Operator update.
8. Click Install.
9. Verify that the Red Hat OpenShift Logging Operator installed by switching to the Operators → Installed Operators page.
10. Ensure that Red Hat OpenShift Logging is listed in the openshift-logging project with a Status of Succeeded.
  If the Operator does not appear as installed, to troubleshoot further:
  - Switch to the Operators → Installed Operators page and inspect the Status column for any errors or failures.
  - Switch to the Workloads → Pods page and check the logs in any pods in the openshift-logging project that are reporting issues.
Create an OpenShift Logging instance:
1. Switch to the Administration → Custom Resource Definitions page.
2. On the Custom Resource Definitions page, click ClusterLogging.
3. On the Custom Resource Definition details page, select View Instances from the Actions menu.
4. On the ClusterLoggings page, click Create ClusterLogging.
  You might have to refresh the page to load the data.
5. In the YAML field, replace the code with the following:
  Note
  This default OpenShift Logging configuration should support a wide array of environments. Review the topics on tuning and configuring logging components for information on modifications you can make to your OpenShift Logging cluster.
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 1
  namespace: openshift-logging
spec:
  managementState: Managed 2
  logStore:
    type: elasticsearch 3
    retentionPolicy: 4
      application:
        maxAge: 1d
      infra:
        maxAge: 7d
      audit:
        maxAge: 7d
    elasticsearch:
      nodeCount: 3 5
      storage:
        storageClassName: <storage_class_name> 6
        size: 200G
      resources: 7
          limits:
            memory: 16Gi
          requests:
            memory: 16Gi
      proxy: 8
        resources:
          limits:
            memory: 256Mi
          requests:
            memory: 256Mi
      redundancyPolicy: SingleRedundancy
  visualization:
    type: kibana 9
    kibana:
      replicas: 1
  collection:
    type: fluentd 10
    fluentd: {}
```
  1
  The name must be instance.
  2
  The OpenShift Logging management state. In some cases, if you change the OpenShift Logging defaults, you must set this to Unmanaged. However, an unmanaged deployment does not receive updates until OpenShift Logging is placed back into a managed state.
  3
  Settings for configuring Elasticsearch. Using the CR, you can configure shard replication policy and persistent storage.
  4
  Specify the length of time that Elasticsearch should retain each log source. Enter an integer and a time designation: weeks(w), hours(h/H), minutes(m) and seconds(s). For example, 7d for seven days. Logs older than the maxAge are deleted. You must specify a retention policy for each log source or the Elasticsearch indices will not be created for that source.
  5
  Specify the number of Elasticsearch nodes. See the note that follows this list.
  6
  Enter the name of an existing storage class for Elasticsearch storage. For best performance, specify a storage class that allocates block storage. If you do not specify a storage class, OpenShift Logging uses ephemeral storage.
  7
  Specify the CPU and memory requests for Elasticsearch as needed. If you leave these values blank, the OpenShift Elasticsearch Operator sets default values that should be sufficient for most deployments. The default values are 16Gi for the memory request and 1 for the CPU request.
  8
  Specify the CPU and memory requests for the Elasticsearch proxy as needed. If you leave these values blank, the OpenShift Elasticsearch Operator sets default values that should be sufficient for most deployments. The default values are 256Mi for the memory request and 100m for the CPU request.
  9
  Settings for configuring Kibana. Using the CR, you can scale Kibana for redundancy and configure the CPU and memory for your Kibana nodes. For more information, see Configuring the log visualizer.
  10
  Settings for configuring Fluentd. Using the CR, you can configure Fluentd CPU and memory limits. For more information, see "Configuring Fluentd".
  Note
  The maximum number of master nodes is three. If you specify a nodeCount greater than 3, OpenShift Container Platform creates three Elasticsearch nodes that are Master-eligible nodes, with the master, client, and data roles. The additional Elasticsearch nodes are created as Data-only nodes, using client and data roles. Master nodes perform cluster-wide actions such as creating or deleting an index, shard allocation, and tracking nodes. Data nodes hold the shards and perform data-related operations such as CRUD, search, and aggregations. Data-related operations are I/O-, memory-, and CPU-intensive. It is important to monitor these resources and to add more Data nodes if the current nodes are overloaded.
  For example, if nodeCount=4, the following nodes are created:
  $ oc get deployment
  Example output
  
  cluster-logging-operator-66f77ffccb-ppzbg 1/1 Running 0 7m elasticsearch-cd-tuhduuw-1-f5c885dbf-dlqws 1/1 Running 0 2m4s elasticsearch-cdm-ftuhduuw-1-ffc4b9566-q6bhp 2/2 Running 0 2m40s elasticsearch-cdm-ftuhduuw-2-7b4994dbfc-rd2gc 2/2 Running 0 2m36s elasticsearch-cdm-ftuhduuw-3-84b5ff7ff8-gqnm2 2/2 Running 0 2m4s
6. Click Create. This creates the logging components, the Elasticsearch custom resource and components, and the Kibana interface.

Verify the install:

Switch to the Workloads → Pods page.

Select the openshift-logging project.

You should see several pods for OpenShift Logging, Elasticsearch, your collector, and Kibana similar to the following list:

Example output

cluster-logging-operator-66f77ffccb-ppzbg       1/1     Running   0          7m
elasticsearch-cdm-ftuhduuw-1-ffc4b9566-q6bhp    2/2     Running   0          2m40s
elasticsearch-cdm-ftuhduuw-2-7b4994dbfc-rd2gc   2/2     Running   0          2m36s
elasticsearch-cdm-ftuhduuw-3-84b5ff7ff8-gqnm2   2/2     Running   0          2m4s
collector-587vb                                   1/1     Running   0          2m26s
collector-7mpb9                                   1/1     Running   0          2m30s
collector-flm6j                                   1/1     Running   0          2m33s
collector-gn4rn                                   1/1     Running   0          2m26s
collector-nlgb6                                   1/1     Running   0          2m30s
collector-snpkt                                   1/1     Running   0          2m28s
kibana-d6d5668c5-rppqm                          2/2     Running   0          2m39s

7.2. Installing Logging with Elasticsearch using the CLI

Elasticsearch is a memory-intensive application. By default, OpenShift Container Platform installs three Elasticsearch nodes with memory requests and limits of 16 GB. This initial set of three OpenShift Container Platform nodes might not have enough memory to run Elasticsearch within your cluster. If you experience memory issues that are related to Elasticsearch, add more Elasticsearch nodes to your cluster rather than increasing the memory on existing nodes.

Prerequisites

Ensure that you have the necessary persistent storage for Elasticsearch. Note that each Elasticsearch node requires its own storage volume.
Note
If you use a local volume for persistent storage, do not use a raw block volume, which is described with volumeMode: block in the LocalVolume object. Elasticsearch cannot use raw block volumes.

Procedure

Create a Namespace object for the OpenShift Elasticsearch Operator:
Example Namespace object
```
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-operators-redhat 1
  annotations:
    openshift.io/node-selector: ""
  labels:
    openshift.io/cluster-monitoring: "true" 2
```
1
You must specify the openshift-operators-redhat namespace. The openshift-operators namespace might contain Community Operators, which are untrusted and could publish a metric with the same name as an OpenShift Container Platform metric, which would cause conflicts.
2
A string value that specifies the label as shown to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
Apply the Namespace object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Namespace object for the Red Hat OpenShift Logging Operator:
Example Namespace object
```
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-logging 1
  annotations:
    openshift.io/node-selector: ""
  labels:
    openshift.io/cluster-monitoring: "true"
```
1
You must specify openshift-logging as the namespace for logging versions 5.7 and earlier. For logging 5.8 and later, you can use any namespace.
Apply the Namespace object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Create an OperatorGroup object for the OpenShift Elasticsearch Operator:

Example OperatorGroup object

apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: openshift-operators-redhat
  namespace: openshift-operators-redhat 1
spec: {}

1: You must specify the openshift-operators-redhat namespace.

Apply the OperatorGroup object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Subscription object to subscribe a namespace to the OpenShift Elasticsearch Operator:
Note
The stable channel only provides updates to the most recent release of logging. To continue receiving updates for prior releases, you must change your subscription channel to stable-x.y, where x.y represents the major and minor version of logging you have installed. For example, stable-5.7.
Example Subscription object
```
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: elasticsearch-operator
  namespace: openshift-operators-redhat 1
spec:
  channel: <channel> 2
  installPlanApproval: Automatic 3
  source: redhat-operators 4
  sourceNamespace: openshift-marketplace
  name: elasticsearch-operator
```
1
You must specify the openshift-operators-redhat namespace.
2
Specify stable, or stable-<x.y> as the channel.
3
Automatic allows the Operator Lifecycle Manager (OLM) to automatically update the Operator when a new version is available. Manual requires a user with appropriate credentials to approve the Operator update.
4
Specify redhat-operators. If your OpenShift Container Platform cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the CatalogSource object you created when you configured the Operator Lifecycle Manager (OLM)
Apply the subscription by running the following command:
```
$ oc apply -f <filename>.yaml
```

Verify the Operator installation by running the following command:

$ oc get csv --all-namespaces

Example output

NAMESPACE                                          NAME                            DISPLAY                            VERSION          REPLACES                        PHASE
default                                            elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
kube-node-lease                                    elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
kube-public                                        elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
kube-system                                        elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
openshift-apiserver-operator                       elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
openshift-apiserver                                elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
openshift-authentication-operator                  elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
openshift-authentication                           elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
openshift-cloud-controller-manager-operator        elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
openshift-cloud-controller-manager                 elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded
openshift-cloud-credential-operator                elasticsearch-operator.v5.8.3   OpenShift Elasticsearch Operator   5.8.3            elasticsearch-operator.v5.8.2   Succeeded

Create an OperatorGroup object for the Red Hat OpenShift Logging Operator:
Example OperatorGroup object
```
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging 1
spec:
  targetNamespaces:
  - openshift-logging 2
```
1
You must specify openshift-logging as the namespace for logging versions 5.7 and earlier. For logging 5.8 and later, you can use any namespace.
2
You must specify openshift-logging as the namespace for logging versions 5.7 and earlier. For logging 5.8 and later, you can use any namespace.
Apply the OperatorGroup object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Subscription object to subscribe the namespace to the Red Hat OpenShift Logging Operator:
Example Subscription object
```
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging 1
spec:
  channel: stable 2
  name: cluster-logging
  source: redhat-operators 3
  sourceNamespace: openshift-marketplace
```
1
You must specify the openshift-logging namespace for logging versions 5.7 and older. For logging 5.8 and later versions, you can use any namespace.
2
Specify stable or stable-x.y as the channel.
3
Specify redhat-operators. If your OpenShift Container Platform cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the CatalogSource object you created when you configured the Operator Lifecycle Manager (OLM).
Apply the subscription object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a ClusterLogging object as a YAML file:
Example ClusterLogging object
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 1
  namespace: openshift-logging
spec:
  managementState: Managed 2
  logStore:
    type: elasticsearch 3
    retentionPolicy: 4
      application:
        maxAge: 1d
      infra:
        maxAge: 7d
      audit:
        maxAge: 7d
    elasticsearch:
      nodeCount: 3 5
      storage:
        storageClassName: <storage_class_name> 6
        size: 200G
      resources: 7
          limits:
            memory: 16Gi
          requests:
            memory: 16Gi
      proxy: 8
        resources:
          limits:
            memory: 256Mi
          requests:
            memory: 256Mi
      redundancyPolicy: SingleRedundancy
  visualization:
    type: kibana 9
    kibana:
      replicas: 1
  collection:
    type: fluentd 10
    fluentd: {}
```
1
The name must be instance.
2
The OpenShift Logging management state. In some cases, if you change the OpenShift Logging defaults, you must set this to Unmanaged. However, an unmanaged deployment does not receive updates until OpenShift Logging is placed back into a managed state.
3
Settings for configuring Elasticsearch. Using the CR, you can configure shard replication policy and persistent storage.
4
Specify the length of time that Elasticsearch should retain each log source. Enter an integer and a time designation: weeks(w), hours(h/H), minutes(m) and seconds(s). For example, 7d for seven days. Logs older than the maxAge are deleted. You must specify a retention policy for each log source or the Elasticsearch indices will not be created for that source.
5
Specify the number of Elasticsearch nodes.
6
Enter the name of an existing storage class for Elasticsearch storage. For best performance, specify a storage class that allocates block storage. If you do not specify a storage class, OpenShift Logging uses ephemeral storage.
7
Specify the CPU and memory requests for Elasticsearch as needed. If you leave these values blank, the OpenShift Elasticsearch Operator sets default values that should be sufficient for most deployments. The default values are 16Gi for the memory request and 1 for the CPU request.
8
Specify the CPU and memory requests for the Elasticsearch proxy as needed. If you leave these values blank, the OpenShift Elasticsearch Operator sets default values that should be sufficient for most deployments. The default values are 256Mi for the memory request and 100m for the CPU request.
9
Settings for configuring Kibana. Using the CR, you can scale Kibana for redundancy and configure the CPU and memory for your Kibana nodes.
10
Settings for configuring Fluentd. Using the CR, you can configure Fluentd CPU and memory limits.
Note
The maximum number of master nodes is three. If you specify a nodeCount greater than 3, OpenShift Container Platform creates three Elasticsearch nodes that are Master-eligible nodes, with the master, client, and data roles. The additional Elasticsearch nodes are created as Data-only nodes, using client and data roles. Master nodes perform cluster-wide actions such as creating or deleting an index, shard allocation, and tracking nodes. Data nodes hold the shards and perform data-related operations such as CRUD, search, and aggregations. Data-related operations are I/O-, memory-, and CPU-intensive. It is important to monitor these resources and to add more Data nodes if the current nodes are overloaded.
For example, if nodeCount=4, the following nodes are created:
```
$ oc get deployment
```
Example output
```
cluster-logging-operator-66f77ffccb-ppzbg       1/1     Running   0          7m
elasticsearch-cdm-ftuhduuw-1-ffc4b9566-q6bhp    2/2     Running   0          2m40s
elasticsearch-cdm-ftuhduuw-2-7b4994dbfc-rd2gc   2/2     Running   0          2m36s
elasticsearch-cdm-ftuhduuw-3-84b5ff7ff8-gqnm2   2/2     Running   0          2m4s
```
Apply the ClusterLogging CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

Verify the installation by running the following command:

$ oc get pods -n openshift-logging

Example output

NAME                                            READY   STATUS    RESTARTS   AGE
cluster-logging-operator-66f77ffccb-ppzbg       1/1     Running   0          7m
elasticsearch-cdm-ftuhduuw-1-ffc4b9566-q6bhp    2/2     Running   0          2m40s
elasticsearch-cdm-ftuhduuw-2-7b4994dbfc-rd2gc   2/2     Running   0          2m36s
elasticsearch-cdm-ftuhduuw-3-84b5ff7ff8-gqnm2   2/2     Running   0          2m4s
collector-587vb                                 1/1     Running   0          2m26s
collector-7mpb9                                 1/1     Running   0          2m30s
collector-flm6j                                 1/1     Running   0          2m33s
collector-gn4rn                                 1/1     Running   0          2m26s
collector-nlgb6                                 1/1     Running   0          2m30s
collector-snpkt                                 1/1     Running   0          2m28s
kibana-d6d5668c5-rppqm                          2/2     Running   0          2m39s

Important

7.3. Installing Logging and the Loki Operator using the CLI

To install and configure logging on your OpenShift Container Platform cluster, an Operator such as Loki Operator for log storage must be installed first. This can be done from the OpenShift Container Platform CLI.

Prerequisites

You have administrator permissions.
You installed the OpenShift CLI (oc).
You have access to a supported object store. For example: AWS S3, Google Cloud Storage, Azure, Swift, Minio, or OpenShift Data Foundation.

Note

Create a Namespace object for Loki Operator:
Example Namespace object
```
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-operators-redhat 1
  annotations:
    openshift.io/node-selector: ""
  labels:
    openshift.io/cluster-monitoring: "true" 2
```
1
You must specify the openshift-operators-redhat namespace. To prevent possible conflicts with metrics, you should configure the Prometheus Cluster Monitoring stack to scrape metrics from the openshift-operators-redhat namespace and not the openshift-operators namespace. The openshift-operators namespace might contain community Operators, which are untrusted and could publish a metric with the same name as an OpenShift Container Platform metric, which would cause conflicts.
2
A string value that specifies the label as shown to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
Apply the Namespace object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Subscription object for Loki Operator:
Example Subscription object
```
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat 1
spec:
  channel: stable 2
  name: loki-operator
  source: redhat-operators 3
  sourceNamespace: openshift-marketplace
```
1
You must specify the openshift-operators-redhat namespace.
2
Specify stable, or stable-5.<y> as the channel.
3
Specify redhat-operators. If your OpenShift Container Platform cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the CatalogSource object you created when you configured the Operator Lifecycle Manager (OLM).
Apply the Subscription object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a namespace object for the Red Hat OpenShift Logging Operator:
Example namespace object
```
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-logging 1
annotations:
    openshift.io/node-selector: ""
labels:
    openshift.io/cluster-logging: "true"
    openshift.io/cluster-monitoring: "true" 2
```
1
The Red Hat OpenShift Logging Operator is only deployable to the openshift-logging namespace.
2
A string value that specifies the label as shown to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
Apply the namespace object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Create an OperatorGroup object

Example OperatorGroup object

apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging 1
spec:
  targetNamespaces:
  - openshift-logging

1: You must specify the openshift-logging namespace.

Apply the OperatorGroup object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Subscription object:
```
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging 1
spec:
  channel: stable 2
  name: cluster-logging
  source: redhat-operators 3
  sourceNamespace: openshift-marketplace
```
1
You must specify the openshift-logging namespace.
2
Specify stable, or stable-5.<y> as the channel.
3
Specify redhat-operators. If your OpenShift Container Platform cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the CatalogSource object you created when you configured the Operator Lifecycle Manager (OLM).
Apply the Subscription object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a LokiStack CR:
Example LokiStack CR
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki 1
  namespace: openshift-logging 2
spec:
  size: 1x.small 3
  storage:
    schemas:
    - version: v13
      effectiveDate: "<yyyy>-<mm>-<dd>"
    secret:
      name: logging-loki-s3 4
      type: s3 5
      credentialMode: 6
  storageClassName: <storage_class_name> 7
  tenants:
    mode: openshift-logging 8
```
1
Use the name logging-loki.
2
You must specify the openshift-logging namespace.
3
Specify the deployment size. In the logging 5.8 and later versions, the supported size options for production instances of Loki are 1x.extra-small, 1x.small, or 1x.medium.
4
Specify the name of your log store secret.
5
Specify the corresponding storage type.
6
Optional field, logging 5.9 and later. Supported user configured values are as follows: static is the default authentication mode available for all supported object storage types using credentials stored in a Secret. token for short-lived tokens retrieved from a credential source. In this mode the static configuration does not contain credentials needed for the object storage. Instead, they are generated during runtime using a service, which allows for shorter-lived credentials and much more granular control. This authentication mode is not supported for all object storage types. token-cco is the default value when Loki is running on managed STS mode and using CCO on STS/WIF clusters.
7
Specify the name of a storage class for temporary storage. For best performance, specify a storage class that allocates block storage. Available storage classes for your cluster can be listed by using the oc get storageclasses command.
8
LokiStack defaults to running in multi-tenant mode, which cannot be modified. One tenant is provided for each log type: audit, infrastructure, and application logs. This enables access control for individual users and user groups to different log streams.
Apply the LokiStack CR object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Create a ClusterLogging CR object:

Example ClusterLogging CR object

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 1
  namespace: openshift-logging 2
spec:
  collection:
    type: vector
  logStore:
    lokistack:
      name: logging-loki
    type: lokistack
  visualization:
    type: ocp-console
    ocpConsole:
      logsLimit: 15
  managementState: Managed

1: Name must be instance.
2: Namespace must be openshift-logging.

Apply the ClusterLogging CR object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Verify the installation by running the following command:

$ oc get pods -n openshift-logging

Example output

$ oc get pods -n openshift-logging
NAME                                               READY   STATUS    RESTARTS   AGE
cluster-logging-operator-fb7f7cf69-8jsbq           1/1     Running   0          98m
collector-222js                                    2/2     Running   0          18m
collector-g9ddv                                    2/2     Running   0          18m
collector-hfqq8                                    2/2     Running   0          18m
collector-sphwg                                    2/2     Running   0          18m
collector-vv7zn                                    2/2     Running   0          18m
collector-wk5zz                                    2/2     Running   0          18m
logging-view-plugin-6f76fbb78f-n2n4n               1/1     Running   0          18m
lokistack-sample-compactor-0                       1/1     Running   0          42m
lokistack-sample-distributor-7d7688bcb9-dvcj8      1/1     Running   0          42m
lokistack-sample-gateway-5f6c75f879-bl7k9          2/2     Running   0          42m
lokistack-sample-gateway-5f6c75f879-xhq98          2/2     Running   0          42m
lokistack-sample-index-gateway-0                   1/1     Running   0          42m
lokistack-sample-ingester-0                        1/1     Running   0          42m
lokistack-sample-querier-6b7b56bccc-2v9q4          1/1     Running   0          42m
lokistack-sample-query-frontend-84fb57c578-gq2f7   1/1     Running   0          42m

7.4. Installing Logging and the Loki Operator using the web console

Prerequisites

You have access to a supported object store (AWS S3, Google Cloud Storage, Azure, Swift, Minio, OpenShift Data Foundation).
You have administrator permissions.
You have access to the OpenShift Container Platform web console.

Procedure

In the OpenShift Container Platform web console Administrator perspective, go to Operators → OperatorHub.
Type Loki Operator in the Filter by keyword field. Click Loki Operator in the list of available Operators, and then click Install.
Important
The Community Loki Operator is not supported by Red Hat.
Select stable or stable-x.y as the Update channel.
Note
The stable channel only provides updates to the most recent release of logging. To continue receiving updates for prior releases, you must change your subscription channel to stable-x.y, where x.y represents the major and minor version of logging you have installed. For example, stable-5.7.
The Loki Operator must be deployed to the global operator group namespace openshift-operators-redhat, so the Installation mode and Installed Namespace are already selected. If this namespace does not already exist, it is created for you.
Select Enable Operator-recommended cluster monitoring on this namespace.
This option sets the openshift.io/cluster-monitoring: "true" label in the Namespace object. You must select this option to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
For Update approval select Automatic, then click Install.
If the approval strategy in the subscription is set to Automatic, the update process initiates as soon as a new Operator version is available in the selected channel. If the approval strategy is set to Manual, you must manually approve pending updates.
Install the Red Hat OpenShift Logging Operator:
1. In the OpenShift Container Platform web console, click Operators → OperatorHub.
2. Choose Red Hat OpenShift Logging from the list of available Operators, and click Install.
3. Ensure that the A specific namespace on the cluster is selected under Installation Mode.
4. Ensure that Operator recommended namespace is openshift-logging under Installed Namespace.
5. Select Enable Operator recommended cluster monitoring on this namespace.
  This option sets the openshift.io/cluster-monitoring: "true" label in the Namespace object. You must select this option to ensure that cluster monitoring scrapes the openshift-logging namespace.
6. Select stable-5.y as the Update Channel.
7. Select an Approval Strategy.
  - The Automatic strategy allows Operator Lifecycle Manager (OLM) to automatically update the Operator when a new version is available.
  - The Manual strategy requires a user with appropriate credentials to approve the Operator update.
8. Click Install.
Go to the Operators → Installed Operators page. Click the All instances tab.
From the Create new drop-down list, select LokiStack.
Select YAML view, and then use the following template to create a LokiStack CR:
Example LokiStack CR
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki 1
  namespace: openshift-logging 2
spec:
  size: 1x.small 3
  storage:
    schemas:
    - version: v13
      effectiveDate: "<yyyy>-<mm>-<dd>"
    secret:
      name: logging-loki-s3 4
      type: s3 5
      credentialMode: 6
  storageClassName: <storage_class_name> 7
  tenants:
    mode: openshift-logging 8
```
1
Use the name logging-loki.
2
You must specify the openshift-logging namespace.
3
Specify the deployment size. In the logging 5.8 and later versions, the supported size options for production instances of Loki are 1x.extra-small, 1x.small, or 1x.medium.
4
Specify the name of your log store secret.
5
Specify the corresponding storage type.
6
Optional field, logging 5.9 and later. Supported user configured values are as follows: static is the default authentication mode available for all supported object storage types using credentials stored in a Secret. token for short-lived tokens retrieved from a credential source. In this mode the static configuration does not contain credentials needed for the object storage. Instead, they are generated during runtime using a service, which allows for shorter-lived credentials and much more granular control. This authentication mode is not supported for all object storage types. token-cco is the default value when Loki is running on managed STS mode and using CCO on STS/WIF clusters.
7
Specify the name of a storage class for temporary storage. For best performance, specify a storage class that allocates block storage. Available storage classes for your cluster can be listed by using the oc get storageclasses command.
8
LokiStack defaults to running in multi-tenant mode, which cannot be modified. One tenant is provided for each log type: audit, infrastructure, and application logs. This enables access control for individual users and user groups to different log streams.
Important
It is not possible to change the number 1x for the deployment size.
Click Create.
Create an OpenShift Logging instance:
1. Switch to the Administration → Custom Resource Definitions page.
2. On the Custom Resource Definitions page, click ClusterLogging.
3. On the Custom Resource Definition details page, select View Instances from the Actions menu.
4. On the ClusterLoggings page, click Create ClusterLogging.
  You might have to refresh the page to load the data.
5. In the YAML field, replace the code with the following:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 1
  namespace: openshift-logging 2
spec:
  collection:
    type: vector
  logStore:
    lokistack:
      name: logging-loki
    type: lokistack
  visualization:
    type: ocp-console
    ocpConsole:
      logsLimit: 15
  managementState: Managed
```
  1
  Name must be instance.
  2
  Namespace must be openshift-logging.

Verification

Go to Operators → Installed Operators.
Make sure the openshift-logging project is selected.
In the Status column, verify that you see green checkmarks with InstallSucceeded and the text Up to date.

Note

An Operator might display a Failed status before the installation finishes. If the Operator install completes with an InstallSucceeded message, refresh the page.

Additional resources

Chapter 8. Updating Logging

There are two types of logging updates: minor release updates (5.y.z) and major release updates (5.y).

8.1. Minor release updates

If you installed the logging Operators using the Automatic update approval option, your Operators receive minor version updates automatically. You do not need to complete any manual update steps.

If you installed the logging Operators using the Manual update approval option, you must manually approve minor version updates. For more information, see Manually approving a pending Operator update.

8.2. Major release updates

For major version updates you must complete some manual steps.

For major release version compatibility and support information, see OpenShift Operator Life Cycles.

8.3. Upgrading the Red Hat OpenShift Logging Operator to watch all namespaces

In logging 5.7 and older versions, the Red Hat OpenShift Logging Operator only watches the openshift-logging namespace. If you want the Red Hat OpenShift Logging Operator to watch all namespaces on your cluster, you must redeploy the Operator. You can complete the following procedure to redeploy the Operator without deleting your logging components.

Prerequisites

You have installed the OpenShift CLI (oc).
You have administrator permissions.

Procedure

Delete the subscription by running the following command:

$ oc -n openshift-logging delete subscription <subscription>

Delete the Operator group by running the following command:

$ oc -n openshift-logging delete operatorgroup <operator_group_name>

Delete the cluster service version (CSV) by running the following command:
```
$ oc delete clusterserviceversion cluster-logging.<version>
```
Redeploy the Red Hat OpenShift Logging Operator by following the "Installing Logging" documentation.

Verification

Check that the targetNamespaces field in the OperatorGroup resource is not present or is set to an empty string.

To do this, run the following command and inspect the output:

$ oc get operatorgroup <operator_group_name> -o yaml

Example output

apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: openshift-logging-f52cn
  namespace: openshift-logging
spec:
  upgradeStrategy: Default
status:
  namespaces:
  - ""
# ...

8.4. Updating the Red Hat OpenShift Logging Operator

To update the Red Hat OpenShift Logging Operator to a new major release version, you must modify the update channel for the Operator subscription.

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.
You have access to the OpenShift Container Platform web console and are viewing the Administrator perspective.

Procedure

Navigate to Operators → Installed Operators.
Select the openshift-logging project.
Click the Red Hat OpenShift Logging Operator.
Click Subscription. In the Subscription details section, click the Update channel link. This link text might be stable or stable-5.9, depending on your current update channel.
In the Change Subscription Update Channel window, select the latest major version update channel, stable-5.9, and click Save. Note the cluster-logging.v5.9.<z> version.
Wait for a few seconds, and then go to Operators → Installed Operators to verify that the Red Hat OpenShift Logging Operator version matches the latest cluster-logging.v5.9.<z> version.
On the Operators → Installed Operators page, wait for the Status field to report Succeeded.
Check if the LokiStack custom resource contains the v13 schema version and add it if it is missing. For correctly adding the v13 schema version, see "Upgrading the LokiStack storage schema".

8.5. Updating the Loki Operator

To update the Loki Operator to a new major release version, you must modify the update channel for the Operator subscription.

Prerequisites

You have installed the Loki Operator.
You have administrator permissions.
You have access to the OpenShift Container Platform web console and are viewing the Administrator perspective.

Procedure

Navigate to Operators → Installed Operators.
Select the openshift-operators-redhat project.
Click the Loki Operator.
Click Subscription. In the Subscription details section, click the Update channel link. This link text might be stable or stable-5.y, depending on your current update channel.
In the Change Subscription Update Channel window, select the latest major version update channel, stable-5.y, and click Save. Note the loki-operator.v5.y.z version.
Wait for a few seconds, then click Operators → Installed Operators. Verify that the Loki Operator version matches the latest loki-operator.v5.y.z version.
On the Operators → Installed Operators page, wait for the Status field to report Succeeded.
Check if the LokiStack custom resource contains the v13 schema version and add it if it is missing. For correctly adding the v13 schema version, see "Upgrading the LokiStack storage schema".

8.6. Upgrading the LokiStack storage schema

If you are using the Red Hat OpenShift Logging Operator with the Loki Operator, the Red Hat OpenShift Logging Operator 5.9 or later supports the v13 schema version in the LokiStack custom resource. Upgrading to the v13 schema version is recommended because it is the schema version to be supported going forward.

Procedure

Add the v13 schema version in the LokiStack custom resource as follows:
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
# ...
spec:
# ...
  storage:
    schemas:
    # ...
      version: v12 1
    - effectiveDate: "<yyyy>-<mm>-<future_dd>" 2
      version: v13
# ...
```
1
Do not delete. Data persists in its original schema version. Keep the previous schema versions to avoid data loss.
2
Set a future date that has not yet started in the Coordinated Universal Time (UTC) time zone.
Tip
To edit the LokiStack custom resource, you can run the oc edit command:
```
$ oc edit lokistack <name> -n openshift-logging
```

Verification

On or after the specified effectiveDate date, check that there is no LokistackSchemaUpgradesRequired alert in the web console in Administrator → Observe → Alerting.

8.7. Updating the OpenShift Elasticsearch Operator

To update the OpenShift Elasticsearch Operator to the current version, you must modify the subscription.

Note

The Logging 5.9 release does not contain an updated version of the OpenShift Elasticsearch Operator. If you currently use the OpenShift Elasticsearch Operator released with Logging 5.8, it will continue to work with Logging until the EOL of Logging 5.8. As an alternative to using the OpenShift Elasticsearch Operator to manage the default log storage, you can use the Loki Operator. For more information on the Logging lifecycle dates, see Platform Agnostic Operators.

Prerequisites

If you are using Elasticsearch as the default log store, and Kibana as the UI, update the OpenShift Elasticsearch Operator before you update the Red Hat OpenShift Logging Operator.
Important
If you update the Operators in the wrong order, Kibana does not update and the Kibana custom resource (CR) is not created. To fix this issue, delete the Red Hat OpenShift Logging Operator pod. When the Red Hat OpenShift Logging Operator pod redeploys, it creates the Kibana CR and Kibana becomes available again.
The Logging status is healthy:
- All pods have a ready status.
- The Elasticsearch cluster is healthy.
Your Elasticsearch and Kibana data is backed up.
You have administrator permissions.
You have installed the OpenShift CLI (oc) for the verification steps.

Procedure

In the OpenShift Container Platform web console, click Operators → Installed Operators.
Select the openshift-operators-redhat project.
Click OpenShift Elasticsearch Operator.
Click Subscription → Channel.
In the Change Subscription Update Channel window, select stable-5.y and click Save. Note the elasticsearch-operator.v5.y.z version.
Wait for a few seconds, then click Operators → Installed Operators. Verify that the OpenShift Elasticsearch Operator version matches the latest elasticsearch-operator.v5.y.z version.
On the Operators → Installed Operators page, wait for the Status field to report Succeeded.

Verification

Verify that all Elasticsearch pods have a Ready status by entering the following command and observing the output:

$ oc get pod -n openshift-logging --selector component=elasticsearch

Example output

NAME                                            READY   STATUS    RESTARTS   AGE
elasticsearch-cdm-1pbrl44l-1-55b7546f4c-mshhk   2/2     Running   0          31m
elasticsearch-cdm-1pbrl44l-2-5c6d87589f-gx5hk   2/2     Running   0          30m
elasticsearch-cdm-1pbrl44l-3-88df5d47-m45jc     2/2     Running   0          29m

Verify that the Elasticsearch cluster status is green by entering the following command and observing the output:

$ oc exec -n openshift-logging -c elasticsearch elasticsearch-cdm-1pbrl44l-1-55b7546f4c-mshhk -- health

Example output

{
  "cluster_name" : "elasticsearch",
  "status" : "green",
}

Verify that the Elasticsearch cron jobs are created by entering the following commands and observing the output:

$ oc project openshift-logging

$ oc get cronjob

Example output

NAME                     SCHEDULE       SUSPEND   ACTIVE   LAST SCHEDULE   AGE
elasticsearch-im-app     */15 * * * *   False     0        <none>          56s
elasticsearch-im-audit   */15 * * * *   False     0        <none>          56s
elasticsearch-im-infra   */15 * * * *   False     0        <none>          56s

Verify that the log store is updated to the correct version and the indices are green by entering the following command and observing the output:

$ oc exec -c elasticsearch <any_es_pod_in_the_cluster> -- indices

Verify that the output includes the app-00000x, infra-00000x, audit-00000x, .security indices:

Example 8.1. Sample output with indices in a green status

Tue Jun 30 14:30:54 UTC 2020
health status index                                                                 uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   infra-000008                                                          bnBvUFEXTWi92z3zWAzieQ   3 1       222195            0        289            144
green  open   infra-000004                                                          rtDSzoqsSl6saisSK7Au1Q   3 1       226717            0        297            148
green  open   infra-000012                                                          RSf_kUwDSR2xEuKRZMPqZQ   3 1       227623            0        295            147
green  open   .kibana_7                                                             1SJdCqlZTPWlIAaOUd78yg   1 1            4            0          0              0
green  open   infra-000010                                                          iXwL3bnqTuGEABbUDa6OVw   3 1       248368            0        317            158
green  open   infra-000009                                                          YN9EsULWSNaxWeeNvOs0RA   3 1       258799            0        337            168
green  open   infra-000014                                                          YP0U6R7FQ_GVQVQZ6Yh9Ig   3 1       223788            0        292            146
green  open   infra-000015                                                          JRBbAbEmSMqK5X40df9HbQ   3 1       224371            0        291            145
green  open   .orphaned.2020.06.30                                                  n_xQC2dWQzConkvQqei3YA   3 1            9            0          0              0
green  open   infra-000007                                                          llkkAVSzSOmosWTSAJM_hg   3 1       228584            0        296            148
green  open   infra-000005                                                          d9BoGQdiQASsS3BBFm2iRA   3 1       227987            0        297            148
green  open   infra-000003                                                          1-goREK1QUKlQPAIVkWVaQ   3 1       226719            0        295            147
green  open   .security                                                             zeT65uOuRTKZMjg_bbUc1g   1 1            5            0          0              0
green  open   .kibana-377444158_kubeadmin                                           wvMhDwJkR-mRZQO84K0gUQ   3 1            1            0          0              0
green  open   infra-000006                                                          5H-KBSXGQKiO7hdapDE23g   3 1       226676            0        295            147
green  open   infra-000001                                                          eH53BQ-bSxSWR5xYZB6lVg   3 1       341800            0        443            220
green  open   .kibana-6                                                             RVp7TemSSemGJcsSUmuf3A   1 1            4            0          0              0
green  open   infra-000011                                                          J7XWBauWSTe0jnzX02fU6A   3 1       226100            0        293            146
green  open   app-000001                                                            axSAFfONQDmKwatkjPXdtw   3 1       103186            0        126             57
green  open   infra-000016                                                          m9c1iRLtStWSF1GopaRyCg   3 1        13685            0         19              9
green  open   infra-000002                                                          Hz6WvINtTvKcQzw-ewmbYg   3 1       228994            0        296            148
green  open   infra-000013                                                          KR9mMFUpQl-jraYtanyIGw   3 1       228166            0        298            148
green  open   audit-000001                                                          eERqLdLmQOiQDFES1LBATQ   3 1            0            0          0              0

Verify that the log visualizer is updated to the correct version by entering the following command and observing the output:

$ oc get kibana kibana -o json

Verify that the output includes a Kibana pod with the ready status:

Example 8.2. Sample output with a ready Kibana pod

[
{
"clusterCondition": {
"kibana-5fdd766ffd-nb2jj": [
{
"lastTransitionTime": "2020-06-30T14:11:07Z",
"reason": "ContainerCreating",
"status": "True",
"type": ""
},
{
"lastTransitionTime": "2020-06-30T14:11:07Z",
"reason": "ContainerCreating",
"status": "True",
"type": ""
}
]
},
"deployment": "kibana",
"pods": {
"failed": [],
"notReady": []
"ready": []
},
"replicaSets": [
"kibana-5fdd766ffd"
],
"replicas": 1
}
]

Chapter 9. Visualizing logs

9.1. About log visualization

You can visualize your log data in the OpenShift Container Platform web console, or the Kibana web console, depending on your deployed log storage solution. The Kibana console can be used with ElasticSearch log stores, and the OpenShift Container Platform web console can be used with the ElasticSearch log store or the LokiStack.

Note

The Kibana web console is now deprecated is planned to be removed in a future logging release.

9.1.1. Configuring the log visualizer

You can configure which log visualizer type your logging uses by modifying the ClusterLogging custom resource (CR).

Prerequisites

You have administrator permissions.
You have installed the OpenShift CLI (oc).
You have installed the Red Hat OpenShift Logging Operator.
You have created a ClusterLogging CR.

Important

If you want to use the OpenShift Container Platform web console for visualization, you must enable the logging Console Plugin. See the documentation about "Log visualization with the web console".

Procedure

Modify the ClusterLogging CR visualization spec:
ClusterLogging CR example
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
# ...
spec:
# ...
  visualization:
    type: <visualizer_type> 1
    kibana: 2
      resources: {}
      nodeSelector: {}
      proxy: {}
      replicas: {}
      tolerations: {}
    ocpConsole: 3
      logsLimit: {}
      timeout: {}
# ...
```
1
The type of visualizer you want to use for your logging. This can be either kibana or ocp-console. The Kibana console is only compatible with deployments that use Elasticsearch log storage, while the OpenShift Container Platform console is only compatible with LokiStack deployments.
2
Optional configurations for the Kibana console.
3
Optional configurations for the OpenShift Container Platform web console.
Apply the ClusterLogging CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

9.1.2. Viewing logs for a resource

Resource logs are a default feature that provides limited log viewing capability. You can view the logs for various resources, such as builds, deployments, and pods by using the OpenShift CLI (oc) and the web console.

Tip

To enhance your log retrieving and viewing experience, install the logging. The logging aggregates all the logs from your OpenShift Container Platform cluster, such as node system audit logs, application container logs, and infrastructure logs, into a dedicated log store. You can then query, discover, and visualize your log data through the Kibana console or the OpenShift Container Platform web console. Resource logs do not access the logging log store.

9.1.2.1. Viewing resource logs

You can view the log for various resources in the OpenShift CLI (oc) and web console. Logs read from the tail, or end, of the log.

Prerequisites

Access to the OpenShift CLI (oc).

Procedure (UI)

In the OpenShift Container Platform console, navigate to Workloads → Pods or navigate to the pod through the resource you want to investigate.
Note
Some resources, such as builds, do not have pods to query directly. In such instances, you can locate the Logs link on the Details page for the resource.
Select a project from the drop-down menu.
Click the name of the pod you want to investigate.
Click Logs.

Procedure (CLI)

View the log for a specific pod:
```
$ oc logs -f <pod_name> -c <container_name>
```
where:
-f
Optional: Specifies that the output follows what is being written into the logs.
<pod_name>
Specifies the name of the pod.
<container_name>
Optional: Specifies the name of a container. When a pod has more than one container, you must specify the container name.
For example:
```
$ oc logs ruby-58cd97df55-mww7r
```
```
$ oc logs -f ruby-57f7f4855b-znl92 -c ruby
```
The contents of log files are printed out.
View the log for a specific resource:
```
$ oc logs <object_type>/<resource_name> 1
```
1
Specifies the resource type and name.
For example:
```
$ oc logs deployment/ruby
```
The contents of log files are printed out.

9.2. Log visualization with the web console

You can use the OpenShift Container Platform web console to visualize log data by configuring the logging Console Plugin. Options for configuration are available during installation of logging on the web console.

If you have already installed logging and want to configure the plugin, use one of the following procedures.

9.2.1. Enabling the logging Console Plugin after you have installed the Red Hat OpenShift Logging Operator

You can enable the logging Console Plugin as part of the Red Hat OpenShift Logging Operator installation, but you can also enable the plugin if you have already installed the Red Hat OpenShift Logging Operator with the plugin disabled.

Prerequisites

You have administrator permissions.
You have installed the Red Hat OpenShift Logging Operator and selected Disabled for the Console plugin.
You have access to the OpenShift Container Platform web console.

Procedure

In the OpenShift Container Platform web console Administrator perspective, navigate to Operators → Installed Operators.
Click Red Hat OpenShift Logging. This takes you to the Operator Details page.
In the Details page, click Disabled for the Console plugin option.
In the Console plugin enablement dialog, select Enable.
Click Save.
Verify that the Console plugin option now shows Enabled.
The web console displays a pop-up window when changes have been applied. The window prompts you to reload the web console. Refresh the browser when you see the pop-up window to apply the changes.

9.2.2. Configuring the logging Console Plugin when you have the Elasticsearch log store and LokiStack installed

In logging version 5.8 and later, if the Elasticsearch log store is your default log store but you have also installed the LokiStack, you can enable the logging Console Plugin by using the following procedure.

Prerequisites

You have administrator permissions.
You have installed the Red Hat OpenShift Logging Operator, the OpenShift Elasticsearch Operator, and the Loki Operator.
You have installed the OpenShift CLI (oc).
You have created a ClusterLogging custom resource (CR).

Procedure

Ensure that the logging Console Plugin is enabled by running the following command:

$ oc get consoles.operator.openshift.io cluster -o yaml |grep logging-view-plugin  \
|| oc patch consoles.operator.openshift.io cluster  --type=merge \
--patch '{ "spec": { "plugins": ["logging-view-plugin"]}}'

Add the .metadata.annotations.logging.openshift.io/ocp-console-migration-target: lokistack-dev annotation to the ClusterLogging CR, by running the following command:

$ oc patch clusterlogging instance --type=merge --patch \
'{ "metadata": { "annotations": { "logging.openshift.io/ocp-console-migration-target": "lokistack-dev" }}}' \
-n openshift-logging

Example output

clusterlogging.logging.openshift.io/instance patched

Verification

Verify that the annotation was added successfully, by running the following command and observing the output:

$ oc get clusterlogging instance \
-o=jsonpath='{.metadata.annotations.logging\.openshift\.io/ocp-console-migration-target}' \
-n openshift-logging

Example output

"lokistack-dev"

The logging Console Plugin pod is now deployed. You can view logging data by navigating to the OpenShift Container Platform web console and viewing the Observe → Logs page.

9.3. Viewing cluster dashboards

The Logging/Elasticsearch Nodes and Openshift Logging dashboards in the OpenShift Container Platform web console contain in-depth details about your Elasticsearch instance and the individual Elasticsearch nodes that you can use to prevent and diagnose problems.

The OpenShift Logging dashboard contains charts that show details about your Elasticsearch instance at a cluster level, including cluster resources, garbage collection, shards in the cluster, and Fluentd statistics.

The Logging/Elasticsearch Nodes dashboard contains charts that show details about your Elasticsearch instance, many at node level, including details on indexing, shards, resources, and so forth.

9.3.1. Accessing the Elasticsearch and OpenShift Logging dashboards

You can view the Logging/Elasticsearch Nodes and OpenShift Logging dashboards in the OpenShift Container Platform web console.

Procedure

To launch the dashboards:

In the OpenShift Container Platform web console, click Observe → Dashboards.
On the Dashboards page, select Logging/Elasticsearch Nodes or OpenShift Logging from the Dashboard menu.
For the Logging/Elasticsearch Nodes dashboard, you can select the Elasticsearch node you want to view and set the data resolution.
The appropriate dashboard is displayed, showing multiple charts of data.
Optional: Select a different time range to display or refresh rate for the data from the Time Range and Refresh Interval menus.

For information on the dashboard charts, see About the OpenShift Logging dashboard and About the Logging/Elastisearch Nodes dashboard.

9.3.2. About the OpenShift Logging dashboard

The OpenShift Logging dashboard contains charts that show details about your Elasticsearch instance at a cluster-level that you can use to diagnose and anticipate problems.

Table 9.1. OpenShift Logging charts
Metric	Description
Elastic Cluster Status	The current Elasticsearch status: ONLINE - Indicates that the Elasticsearch instance is online. OFFLINE - Indicates that the Elasticsearch instance is offline.
Elastic Nodes	The total number of Elasticsearch nodes in the Elasticsearch instance.
Elastic Shards	The total number of Elasticsearch shards in the Elasticsearch instance.
Elastic Documents	The total number of Elasticsearch documents in the Elasticsearch instance.
Total Index Size on Disk	The total disk space that is being used for the Elasticsearch indices.
Elastic Pending Tasks	The total number of Elasticsearch changes that have not been completed, such as index creation, index mapping, shard allocation, or shard failure.
Elastic JVM GC time	The amount of time that the JVM spent executing Elasticsearch garbage collection operations in the cluster.
Elastic JVM GC Rate	The total number of times that JVM executed garbage activities per second.
Elastic Query/Fetch Latency Sum	Query latency: The average time each Elasticsearch search query takes to execute. Fetch latency: The average time each Elasticsearch search query spends fetching data. Fetch latency typically takes less time than query latency. If fetch latency is consistently increasing, it might indicate slow disks, data enrichment, or large requests with too many results.
Elastic Query Rate	The total queries executed against the Elasticsearch instance per second for each Elasticsearch node.
CPU	The amount of CPU used by Elasticsearch, Fluentd, and Kibana, shown for each component.
Elastic JVM Heap Used	The amount of JVM memory used. In a healthy cluster, the graph shows regular drops as memory is freed by JVM garbage collection.
Elasticsearch Disk Usage	The total disk space used by the Elasticsearch instance for each Elasticsearch node.
File Descriptors In Use	The total number of file descriptors used by Elasticsearch, Fluentd, and Kibana.
FluentD emit count	The total number of Fluentd messages per second for the Fluentd default output, and the retry count for the default output.
FluentD Buffer Usage	The percent of the Fluentd buffer that is being used for chunks. A full buffer might indicate that Fluentd is not able to process the number of logs received.
Elastic rx bytes	The total number of bytes that Elasticsearch has received from FluentD, the Elasticsearch nodes, and other sources.
Elastic Index Failure Rate	The total number of times per second that an Elasticsearch index fails. A high rate might indicate an issue with indexing.
FluentD Output Error Rate	The total number of times per second that FluentD is not able to output logs.

9.3.3. Charts on the Logging/Elasticsearch nodes dashboard

The Logging/Elasticsearch Nodes dashboard contains charts that show details about your Elasticsearch instance, many at node-level, for further diagnostics.

Elasticsearch status: The Logging/Elasticsearch Nodes dashboard contains the following charts about the status of your Elasticsearch instance.

Table 9.2. Elasticsearch status fields
Metric	Description
Cluster status	The cluster health status during the selected time period, using the Elasticsearch green, yellow, and red statuses: 0 - Indicates that the Elasticsearch instance is in green status, which means that all shards are allocated. 1 - Indicates that the Elasticsearch instance is in yellow status, which means that replica shards for at least one shard are not allocated. 2 - Indicates that the Elasticsearch instance is in red status, which means that at least one primary shard and its replicas are not allocated.
Cluster nodes	The total number of Elasticsearch nodes in the cluster.
Cluster data nodes	The number of Elasticsearch data nodes in the cluster.
Cluster pending tasks	The number of cluster state changes that are not finished and are waiting in a cluster queue, for example, index creation, index deletion, or shard allocation. A growing trend indicates that the cluster is not able to keep up with changes.

Elasticsearch cluster index shard status: Each Elasticsearch index is a logical group of one or more shards, which are basic units of persisted data. There are two types of index shards: primary shards, and replica shards. When a document is indexed into an index, it is stored in one of its primary shards and copied into every replica of that shard. The number of primary shards is specified when the index is created, and the number cannot change during index lifetime. You can change the number of replica shards at any time.

The index shard can be in several states depending on its lifecycle phase or events occurring in the cluster. When the shard is able to perform search and indexing requests, the shard is active. If the shard cannot perform these requests, the shard is non–active. A shard might be non-active if the shard is initializing, reallocating, unassigned, and so forth.

Index shards consist of a number of smaller internal blocks, called index segments, which are physical representations of the data. An index segment is a relatively small, immutable Lucene index that is created when Lucene commits newly-indexed data. Lucene, a search library used by Elasticsearch, merges index segments into larger segments in the background to keep the total number of segments low. If the process of merging segments is slower than the speed at which new segments are created, it could indicate a problem.

When Lucene performs data operations, such as a search operation, Lucene performs the operation against the index segments in the relevant index. For that purpose, each segment contains specific data structures that are loaded in the memory and mapped. Index mapping can have a significant impact on the memory used by segment data structures.

The Logging/Elasticsearch Nodes dashboard contains the following charts about the Elasticsearch index shards.

Table 9.3. Elasticsearch cluster shard status charts
Metric	Description
Cluster active shards	The number of active primary shards and the total number of shards, including replicas, in the cluster. If the number of shards grows higher, the cluster performance can start degrading.
Cluster initializing shards	The number of non-active shards in the cluster. A non-active shard is one that is initializing, being reallocated to a different node, or is unassigned. A cluster typically has non–active shards for short periods. A growing number of non–active shards over longer periods could indicate a problem.
Cluster relocating shards	The number of shards that Elasticsearch is relocating to a new node. Elasticsearch relocates nodes for multiple reasons, such as high memory use on a node or after a new node is added to the cluster.
Cluster unassigned shards	The number of unassigned shards. Elasticsearch shards might be unassigned for reasons such as a new index being added or the failure of a node.

Elasticsearch node metrics: Each Elasticsearch node has a finite amount of resources that can be used to process tasks. When all the resources are being used and Elasticsearch attempts to perform a new task, Elasticsearch puts the tasks into a queue until some resources become available.

The Logging/Elasticsearch Nodes dashboard contains the following charts about resource usage for a selected node and the number of tasks waiting in the Elasticsearch queue.

Table 9.4. Elasticsearch node metric charts
Metric	Description
ThreadPool tasks	The number of waiting tasks in individual queues, shown by task type. A long–term accumulation of tasks in any queue could indicate node resource shortages or some other problem.
CPU usage	The amount of CPU being used by the selected Elasticsearch node as a percentage of the total CPU allocated to the host container.
Memory usage	The amount of memory being used by the selected Elasticsearch node.
Disk usage	The total disk space being used for index data and metadata on the selected Elasticsearch node.
Documents indexing rate	The rate that documents are indexed on the selected Elasticsearch node.
Indexing latency	The time taken to index the documents on the selected Elasticsearch node. Indexing latency can be affected by many factors, such as JVM Heap memory and overall load. A growing latency indicates a resource capacity shortage in the instance.
Search rate	The number of search requests run on the selected Elasticsearch node.
Search latency	The time taken to complete search requests on the selected Elasticsearch node. Search latency can be affected by many factors. A growing latency indicates a resource capacity shortage in the instance.
Documents count (with replicas)	The number of Elasticsearch documents stored on the selected Elasticsearch node, including documents stored in both the primary shards and replica shards that are allocated on the node.
Documents deleting rate	The number of Elasticsearch documents being deleted from any of the index shards that are allocated to the selected Elasticsearch node.
Documents merging rate	The number of Elasticsearch documents being merged in any of index shards that are allocated to the selected Elasticsearch node.

Elasticsearch node fielddata: Fielddata is an Elasticsearch data structure that holds lists of terms in an index and is kept in the JVM Heap. Because fielddata building is an expensive operation, Elasticsearch caches the fielddata structures. Elasticsearch can evict a fielddata cache when the underlying index segment is deleted or merged, or if there is not enough JVM HEAP memory for all the fielddata caches.

The Logging/Elasticsearch Nodes dashboard contains the following charts about Elasticsearch fielddata.

Table 9.5. Elasticsearch node fielddata charts
Metric	Description
Fielddata memory size	The amount of JVM Heap used for the fielddata cache on the selected Elasticsearch node.
Fielddata evictions	The number of fielddata structures that were deleted from the selected Elasticsearch node.

Elasticsearch node query cache: If the data stored in the index does not change, search query results are cached in a node-level query cache for reuse by Elasticsearch.

The Logging/Elasticsearch Nodes dashboard contains the following charts about the Elasticsearch node query cache.

Table 9.6. Elasticsearch node query charts
Metric	Description
Query cache size	The total amount of memory used for the query cache for all the shards allocated to the selected Elasticsearch node.
Query cache evictions	The number of query cache evictions on the selected Elasticsearch node.
Query cache hits	The number of query cache hits on the selected Elasticsearch node.
Query cache misses	The number of query cache misses on the selected Elasticsearch node.

Elasticsearch index throttling: When indexing documents, Elasticsearch stores the documents in index segments, which are physical representations of the data. At the same time, Elasticsearch periodically merges smaller segments into a larger segment as a way to optimize resource use. If the indexing is faster then the ability to merge segments, the merge process does not complete quickly enough, which can lead to issues with searches and performance. To prevent this situation, Elasticsearch throttles indexing, typically by reducing the number of threads allocated to indexing down to a single thread.

The Logging/Elasticsearch Nodes dashboard contains the following charts about Elasticsearch index throttling.

Table 9.7. Index throttling charts
Metric	Description
Indexing throttling	The amount of time that Elasticsearch has been throttling the indexing operations on the selected Elasticsearch node.
Merging throttling	The amount of time that Elasticsearch has been throttling the segment merge operations on the selected Elasticsearch node.

Node JVM Heap statistics: The Logging/Elasticsearch Nodes dashboard contains the following charts about JVM Heap operations.

Table 9.8. JVM Heap statistic charts
Metric	Description
Heap used	The amount of the total allocated JVM Heap space that is used on the selected Elasticsearch node.
GC count	The number of garbage collection operations that have been run on the selected Elasticsearch node, by old and young garbage collection.
GC time	The amount of time that the JVM spent running garbage collection operations on the selected Elasticsearch node, by old and young garbage collection.

9.4. Log visualization with Kibana

If you are using the ElasticSearch log store, you can use the Kibana console to visualize collected log data.

Using Kibana, you can do the following with your data:

Search and browse the data using the Discover tab.
Chart and map the data using the Visualize tab.
Create and view custom dashboards using the Dashboard tab.

Use and configuration of the Kibana interface is beyond the scope of this documentation. For more information about using the interface, see the Kibana documentation.

Note

The audit logs are not stored in the internal OpenShift Container Platform Elasticsearch instance by default. To view the audit logs in Kibana, you must use the Log Forwarding API to configure a pipeline that uses the default output for audit logs.

9.4.1. Defining Kibana index patterns

An index pattern defines the Elasticsearch indices that you want to visualize. To explore and visualize data in Kibana, you must create an index pattern.

Prerequisites

A user must have the cluster-admin role, the cluster-reader role, or both roles to view the infra and audit indices in Kibana. The default kubeadmin user has proper permissions to view these indices.
If you can view the pods and logs in the default, kube- and openshift- projects, you should be able to access these indices. You can use the following command to check if the current user has appropriate permissions:
```
$ oc auth can-i get pods --subresource log -n <project>
```
Example output
```
yes
```
Note
The audit logs are not stored in the internal OpenShift Container Platform Elasticsearch instance by default. To view the audit logs in Kibana, you must use the Log Forwarding API to configure a pipeline that uses the default output for audit logs.
Elasticsearch documents must be indexed before you can create index patterns. This is done automatically, but it might take a few minutes in a new or updated cluster.

Procedure

To define index patterns and create visualizations in Kibana:

In the OpenShift Container Platform console, click the Application Launcher and select Logging.
Create your Kibana index patterns by clicking Management → Index Patterns → Create index pattern:
- Each user must manually create index patterns when logging into Kibana the first time to see logs for their projects. Users must create an index pattern named app and use the @timestamp time field to view their container logs.
- Each admin user must create index patterns when logged into Kibana the first time for the app, infra, and audit indices using the @timestamp time field.
Create Kibana Visualizations from the new index patterns.

9.4.2. Viewing cluster logs in Kibana

You view cluster logs in the Kibana web console. The methods for viewing and visualizing your data in Kibana that are beyond the scope of this documentation. For more information, refer to the Kibana documentation.

Prerequisites

The Red Hat OpenShift Logging and Elasticsearch Operators must be installed.
Kibana index patterns must exist.
A user must have the cluster-admin role, the cluster-reader role, or both roles to view the infra and audit indices in Kibana. The default kubeadmin user has proper permissions to view these indices.
If you can view the pods and logs in the default, kube- and openshift- projects, you should be able to access these indices. You can use the following command to check if the current user has appropriate permissions:
```
$ oc auth can-i get pods --subresource log -n <project>
```
Example output
```
yes
```
Note
The audit logs are not stored in the internal OpenShift Container Platform Elasticsearch instance by default. To view the audit logs in Kibana, you must use the Log Forwarding API to configure a pipeline that uses the default output for audit logs.

Procedure

To view logs in Kibana:

In the OpenShift Container Platform console, click the Application Launcher and select Logging.
Log in using the same credentials you use to log in to the OpenShift Container Platform console.
The Kibana interface launches.
In Kibana, click Discover.
Select the index pattern you created from the drop-down menu in the top-left corner: app, audit, or infra.
The log data displays as time-stamped documents.
Expand one of the time-stamped documents.

Click the JSON tab to display the log entry for that document.

Example 9.1. Sample infrastructure log entry in Kibana

{
  "_index": "infra-000001",
  "_type": "_doc",
  "_id": "YmJmYTBlNDkZTRmLTliMGQtMjE3NmFiOGUyOWM3",
  "_version": 1,
  "_score": null,
  "_source": {
    "docker": {
      "container_id": "f85fa55bbef7bb783f041066be1e7c267a6b88c4603dfce213e32c1"
    },
    "kubernetes": {
      "container_name": "registry-server",
      "namespace_name": "openshift-marketplace",
      "pod_name": "redhat-marketplace-n64gc",
      "container_image": "registry.redhat.io/redhat/redhat-marketplace-index:v4.7",
      "container_image_id": "registry.redhat.io/redhat/redhat-marketplace-index@sha256:65fc0c45aabb95809e376feb065771ecda9e5e59cc8b3024c4545c168f",
      "pod_id": "8f594ea2-c866-4b5c-a1c8-a50756704b2a",
      "host": "ip-10-0-182-28.us-east-2.compute.internal",
      "master_url": "https://kubernetes.default.svc",
      "namespace_id": "3abab127-7669-4eb3-b9ef-44c04ad68d38",
      "namespace_labels": {
        "openshift_io/cluster-monitoring": "true"
      },
      "flat_labels": [
        "catalogsource_operators_coreos_com/update=redhat-marketplace"
      ]
    },
    "message": "time=\"2020-09-23T20:47:03Z\" level=info msg=\"serving registry\" database=/database/index.db port=50051",
    "level": "unknown",
    "hostname": "ip-10-0-182-28.internal",
    "pipeline_metadata": {
      "collector": {
        "ipaddr4": "10.0.182.28",
        "inputname": "fluent-plugin-systemd",
        "name": "fluentd",
        "received_at": "2020-09-23T20:47:15.007583+00:00",
        "version": "1.7.4 1.6.0"
      }
    },
    "@timestamp": "2020-09-23T20:47:03.422465+00:00",
    "viaq_msg_id": "YmJmYTBlNDktMDMGQtMjE3NmFiOGUyOWM3",
    "openshift": {
      "labels": {
        "logging": "infra"
      }
    }
  },
  "fields": {
    "@timestamp": [
      "2020-09-23T20:47:03.422Z"
    ],
    "pipeline_metadata.collector.received_at": [
      "2020-09-23T20:47:15.007Z"
    ]
  },
  "sort": [
    1600894023422
  ]
}

9.4.3. Configuring Kibana

You can configure using the Kibana console by modifying the ClusterLogging custom resource (CR).

9.4.3.1. Configuring CPU and memory limits

The logging components allow for adjustments to both the CPU and memory limits.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:

$ oc -n openshift-logging edit ClusterLogging instance

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"
  namespace: openshift-logging

...

spec:
  managementState: "Managed"
  logStore:
    type: "elasticsearch"
    elasticsearch:
      nodeCount: 3
      resources: 1
        limits:
          memory: 16Gi
        requests:
          cpu: 200m
          memory: 16Gi
      storage:
        storageClassName: "gp2"
        size: "200G"
      redundancyPolicy: "SingleRedundancy"
  visualization:
    type: "kibana"
    kibana:
      resources: 2
        limits:
          memory: 1Gi
        requests:
          cpu: 500m
          memory: 1Gi
      proxy:
        resources: 3
          limits:
            memory: 100Mi
          requests:
            cpu: 100m
            memory: 100Mi
      replicas: 2
  collection:
    resources: 4
      limits:
        memory: 736Mi
      requests:
        cpu: 200m
        memory: 736Mi
    type: fluentd

1: Specify the CPU and memory limits and requests for the log store as needed. For Elasticsearch, you must adjust both the request value and the limit value.
2 3: Specify the CPU and memory limits and requests for the log visualizer as needed.
4: Specify the CPU and memory limits and requests for the log collector as needed.

9.4.3.2. Scaling redundancy for the log visualizer nodes

You can scale the pod that hosts the log visualizer for redundancy.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:

$ oc edit ClusterLogging instance

$ oc edit ClusterLogging instance

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"

....

spec:
    visualization:
      type: "kibana"
      kibana:
        replicas: 1 1

1: Specify the number of Kibana nodes.

Chapter 10. Configuring your Logging deployment

10.1. Configuring CPU and memory limits for logging components

You can configure both the CPU and memory limits for each of the logging components as needed.

10.1.1. Configuring CPU and memory limits

The logging components allow for adjustments to both the CPU and memory limits.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:

$ oc -n openshift-logging edit ClusterLogging instance

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"
  namespace: openshift-logging

...

spec:
  managementState: "Managed"
  logStore:
    type: "elasticsearch"
    elasticsearch:
      nodeCount: 3
      resources: 1
        limits:
          memory: 16Gi
        requests:
          cpu: 200m
          memory: 16Gi
      storage:
        storageClassName: "gp2"
        size: "200G"
      redundancyPolicy: "SingleRedundancy"
  visualization:
    type: "kibana"
    kibana:
      resources: 2
        limits:
          memory: 1Gi
        requests:
          cpu: 500m
          memory: 1Gi
      proxy:
        resources: 3
          limits:
            memory: 100Mi
          requests:
            cpu: 100m
            memory: 100Mi
      replicas: 2
  collection:
    resources: 4
      limits:
        memory: 736Mi
      requests:
        cpu: 200m
        memory: 736Mi
    type: fluentd

1: Specify the CPU and memory limits and requests for the log store as needed. For Elasticsearch, you must adjust both the request value and the limit value.
2 3: Specify the CPU and memory limits and requests for the log visualizer as needed.
4: Specify the CPU and memory limits and requests for the log collector as needed.

10.2. Configuring systemd-journald and Fluentd

Because Fluentd reads from the journal, and the journal default settings are very low, journal entries can be lost because the journal cannot keep up with the logging rate from system services.

We recommend setting RateLimitIntervalSec=30s and RateLimitBurst=10000 (or even higher if necessary) to prevent the journal from losing entries.

10.2.1. Configuring systemd-journald for OpenShift Logging

As you scale up your project, the default logging environment might need some adjustments.

For example, if you are missing logs, you might have to increase the rate limits for journald. You can adjust the number of messages to retain for a specified period of time to ensure that OpenShift Logging does not use excessive resources without dropping logs.

You can also determine if you want the logs compressed, how long to retain logs, how or if the logs are stored, and other settings.

Procedure

Create a Butane config file, 40-worker-custom-journald.bu, that includes an /etc/systemd/journald.conf file with the required settings.
Note
See "Creating machine configs with Butane" for information about Butane.
```
variant: openshift
version: 4.16.0
metadata:
  name: 40-worker-custom-journald
  labels:
    machineconfiguration.openshift.io/role: "worker"
storage:
  files:
  - path: /etc/systemd/journald.conf
    mode: 0644 1
    overwrite: true
    contents:
      inline: |
        Compress=yes 2
        ForwardToConsole=no 3
        ForwardToSyslog=no
        MaxRetentionSec=1month 4
        RateLimitBurst=10000 5
        RateLimitIntervalSec=30s
        Storage=persistent 6
        SyncIntervalSec=1s 7
        SystemMaxUse=8G 8
        SystemKeepFree=20% 9
        SystemMaxFileSize=10M 10
```
1
Set the permissions for the journald.conf file. It is recommended to set 0644 permissions.
2
Specify whether you want logs compressed before they are written to the file system. Specify yes to compress the message or no to not compress. The default is yes.
3
Configure whether to forward log messages. Defaults to no for each. Specify:
ForwardToConsole to forward logs to the system console.
ForwardToKMsg to forward logs to the kernel log buffer.
ForwardToSyslog to forward to a syslog daemon.
ForwardToWall to forward messages as wall messages to all logged-in users.
4
Specify the maximum time to store journal entries. Enter a number to specify seconds. Or include a unit: "year", "month", "week", "day", "h" or "m". Enter 0 to disable. The default is 1month.
5
Configure rate limiting. If more logs are received than what is specified in RateLimitBurst during the time interval defined by RateLimitIntervalSec, all further messages within the interval are dropped until the interval is over. It is recommended to set RateLimitIntervalSec=30s and RateLimitBurst=10000, which are the defaults.
6
Specify how logs are stored. The default is persistent:
volatile to store logs in memory in /run/log/journal/. These logs are lost after rebooting.
persistent to store logs to disk in /var/log/journal/. systemd creates the directory if it does not exist.
auto to store logs in /var/log/journal/ if the directory exists. If it does not exist, systemd temporarily stores logs in /run/systemd/journal.
none to not store logs. systemd drops all logs.
7
Specify the timeout before synchronizing journal files to disk for ERR, WARNING, NOTICE, INFO, and DEBUG logs. systemd immediately syncs after receiving a CRIT, ALERT, or EMERG log. The default is 1s.
8
Specify the maximum size the journal can use. The default is 8G.
9
Specify how much disk space systemd must leave free. The default is 20%.
10
Specify the maximum size for individual journal files stored persistently in /var/log/journal. The default is 10M.
Note
If you are removing the rate limit, you might see increased CPU utilization on the system logging daemons as it processes any messages that would have previously been throttled.
For more information on systemd settings, see https://www.freedesktop.org/software/systemd/man/journald.conf.html. The default settings listed on that page might not apply to OpenShift Container Platform.
Use Butane to generate a MachineConfig object file, 40-worker-custom-journald.yaml, containing the configuration to be delivered to the nodes:
```
$ butane 40-worker-custom-journald.bu -o 40-worker-custom-journald.yaml
```
Apply the machine config. For example:
```
$ oc apply -f 40-worker-custom-journald.yaml
```
The controller detects the new MachineConfig object and generates a new rendered-worker-<hash> version.

Monitor the status of the rollout of the new rendered configuration to each node:

$ oc describe machineconfigpool/worker

Example output

Name:         worker
Namespace:
Labels:       machineconfiguration.openshift.io/mco-built-in=
Annotations:  <none>
API Version:  machineconfiguration.openshift.io/v1
Kind:         MachineConfigPool

...

Conditions:
  Message:
  Reason:                All nodes are updating to rendered-worker-913514517bcea7c93bd446f4830bc64e

Chapter 11. Log collection and forwarding

11.1. About log collection and forwarding

The Red Hat OpenShift Logging Operator deploys a collector based on the ClusterLogForwarder resource specification. There are two collector options supported by this Operator: the legacy Fluentd collector, and the Vector collector.

Note

Fluentd is deprecated and is planned to be removed in a future release. Red Hat provides bug fixes and support for this feature during the current release lifecycle, but this feature no longer receives enhancements. As an alternative to Fluentd, you can use Vector instead.

11.1.1. Log collection

The log collector is a daemon set that deploys pods to each OpenShift Container Platform node to collect container and node logs.

By default, the log collector uses the following sources:

System and infrastructure logs generated by journald log messages from the operating system, the container runtime, and OpenShift Container Platform.
/var/log/containers/*.log for all container logs.

If you configure the log collector to collect audit logs, it collects them from /var/log/audit/audit.log.

The log collector collects the logs from these sources and forwards them internally or externally depending on your logging configuration.

11.1.1.1. Log collector types

Vector is a log collector offered as an alternative to Fluentd for the logging.

You can configure which logging collector type your cluster uses by modifying the ClusterLogging custom resource (CR) collection spec:

Example ClusterLogging CR that configures Vector as the collector

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance
  namespace: openshift-logging
spec:
  collection:
    logs:
      type: vector
      vector: {}
# ...

11.1.1.2. Log collection limitations

The container runtimes provide minimal information to identify the source of log messages: project, pod name, and container ID. This information is not sufficient to uniquely identify the source of the logs. If a pod with a given name and project is deleted before the log collector begins processing its logs, information from the API server, such as labels and annotations, might not be available. There might not be a way to distinguish the log messages from a similarly named pod and project or trace the logs to their source. This limitation means that log collection and normalization are considered best effort.

Important

The available container runtimes provide minimal information to identify the source of log messages and do not guarantee unique individual log messages or that these messages can be traced to their source.

11.1.1.3. Log collector features by type

Table 11.1. Log Sources
Feature	Fluentd	Vector
App container logs	✓	✓
App-specific routing	✓	✓
App-specific routing by namespace	✓	✓
Infra container logs	✓	✓
Infra journal logs	✓	✓
Kube API audit logs	✓	✓
OpenShift API audit logs	✓	✓
Open Virtual Network (OVN) audit logs	✓	✓

Table 11.2. Authorization and Authentication
Feature	Fluentd	Vector
Elasticsearch certificates	✓	✓
Elasticsearch username / password	✓	✓
Amazon Cloudwatch keys	✓	✓
Amazon Cloudwatch STS	✓	✓
Kafka certificates	✓	✓
Kafka username / password	✓	✓
Kafka SASL	✓	✓
Loki bearer token	✓	✓

Table 11.3. Normalizations and Transformations
Feature	Fluentd	Vector
Viaq data model - app	✓	✓
Viaq data model - infra	✓	✓
Viaq data model - infra(journal)	✓	✓
Viaq data model - Linux audit	✓	✓
Viaq data model - kube-apiserver audit	✓	✓
Viaq data model - OpenShift API audit	✓	✓
Viaq data model - OVN	✓	✓
Loglevel Normalization	✓	✓
JSON parsing	✓	✓
Structured Index	✓	✓
Multiline error detection	✓	✓
Multicontainer / split indices	✓	✓
Flatten labels	✓	✓
CLF static labels	✓	✓

Table 11.4. Tuning
Feature	Fluentd	Vector
Fluentd readlinelimit	✓
Fluentd buffer	✓
- chunklimitsize	✓
- totallimitsize	✓
- overflowaction	✓
- flushthreadcount	✓
- flushmode	✓
- flushinterval	✓
- retrywait	✓
- retrytype	✓
- retrymaxinterval	✓
- retrytimeout	✓

Table 11.5. Visibility
Feature	Fluentd	Vector
Metrics	✓	✓
Dashboard	✓	✓
Alerts	✓	✓

Table 11.6. Miscellaneous
Feature	Fluentd	Vector
Global proxy support	✓	✓
x86 support	✓	✓
ARM support	✓	✓
IBM Power® support	✓	✓
IBM Z® support	✓	✓
IPv6 support	✓	✓
Log event buffering	✓
Disconnected Cluster	✓	✓

11.1.1.4. Collector outputs

The following collector outputs are supported:

Table 11.7. Supported outputs
Feature	Fluentd	Vector
Elasticsearch v6-v8	✓	✓
Fluent forward	✓
Syslog RFC3164	✓	✓ (Logging 5.7+)
Syslog RFC5424	✓	✓ (Logging 5.7+)
Kafka	✓	✓
Amazon Cloudwatch	✓	✓
Amazon Cloudwatch STS	✓	✓
Loki	✓	✓
HTTP	✓	✓ (Logging 5.7+)
Google Cloud Logging	✓	✓
Splunk		✓ (Logging 5.6+)

11.1.2. Log forwarding

Administrators can create ClusterLogForwarder resources that specify which logs are collected, how they are transformed, and where they are forwarded to.

ClusterLogForwarder resources can be used up to forward container, infrastructure, and audit logs to specific endpoints within or outside of a cluster. Transport Layer Security (TLS) is supported so that log forwarders can be configured to send logs securely.

Administrators can also authorize RBAC permissions that define which service accounts and users can access and forward which types of logs.

11.1.2.1. Log forwarding implementations

There are two log forwarding implementations available: the legacy implementation, and the multi log forwarder feature.

Important

Only the Vector collector is supported for use with the multi log forwarder feature. The Fluentd collector can only be used with legacy implementations.

11.1.2.1.1. Legacy implementation

In legacy implementations, you can only use one log forwarder in your cluster. The ClusterLogForwarder resource in this mode must be named instance, and must be created in the openshift-logging namespace. The ClusterLogForwarder resource also requires a corresponding ClusterLogging resource named instance in the openshift-logging namespace.

11.1.2.1.2. Multi log forwarder feature

The multi log forwarder feature is available in logging 5.8 and later, and provides the following functionality:

Administrators can control which users are allowed to define log collection and which logs they are allowed to collect.
Users who have the required permissions are able to specify additional log collection configurations.
Administrators who are migrating from the deprecated Fluentd collector to the Vector collector can deploy a new log forwarder separately from their existing deployment. The existing and new log forwarders can operate simultaneously while workloads are being migrated.

In multi log forwarder implementations, you are not required to create a corresponding ClusterLogging resource for your ClusterLogForwarder resource. You can create multiple ClusterLogForwarder resources using any name, in any namespace, with the following exceptions:

You cannot create a ClusterLogForwarder resource named instance in the openshift-logging namespace, because this is reserved for a log forwarder that supports the legacy workflow using the Fluentd collector.
You cannot create a ClusterLogForwarder resource named collector in the openshift-logging namespace, because this is reserved for the collector.

11.1.2.2. Enabling the multi log forwarder feature for a cluster

To use the multi log forwarder feature, you must create a service account and cluster role bindings for that service account. You can then reference the service account in the ClusterLogForwarder resource to control access permissions.

Important

In order to support multi log forwarding in additional namespaces other than the openshift-logging namespace, you must update the Red Hat OpenShift Logging Operator to watch all namespaces. This functionality is supported by default in new Red Hat OpenShift Logging Operator version 5.8 installations.

11.1.2.2.1. Authorizing log collection RBAC permissions

In logging 5.8 and later, the Red Hat OpenShift Logging Operator provides collect-audit-logs, collect-application-logs, and collect-infrastructure-logs cluster roles, which enable the collector to collect audit logs, application logs, and infrastructure logs respectively.

You can authorize RBAC permissions for log collection by binding the required cluster roles to a service account.

Prerequisites

The Red Hat OpenShift Logging Operator is installed in the openshift-logging namespace.
You have administrator permissions.

Procedure

Create a service account for the collector. If you want to write logs to storage that requires a token for authentication, you must include a token in the service account.

Bind the appropriate cluster roles to the service account:

Example binding command

$ oc adm policy add-cluster-role-to-user <cluster_role_name> system:serviceaccount:<namespace_name>:<service_account_name>

Additional resources

11.2. Log output types

Outputs define the destination where logs are sent to from a log forwarder. You can configure multiple types of outputs in the ClusterLogForwarder custom resource (CR) to send logs to servers that support different protocols.

11.2.1. Supported log forwarding outputs

Outputs can be any of the following types:

Table 11.8. Supported log output types
Output type	Protocol	Tested with	Logging versions	Supported collector type
Elasticsearch v6	HTTP 1.1	6.8.1, 6.8.23	5.6+	Fluentd, Vector
Elasticsearch v7	HTTP 1.1	7.12.2, 7.17.7, 7.10.1	5.6+	Fluentd, Vector
Elasticsearch v8	HTTP 1.1	8.4.3, 8.6.1	5.6+	Fluentd ^[1], Vector
Fluent Forward	Fluentd forward v1	Fluentd 1.14.6, Logstash 7.10.1, Fluentd 1.14.5	5.4+	Fluentd
Google Cloud Logging	REST over HTTPS	Latest	5.7+	Vector
HTTP	HTTP 1.1	Fluentd 1.14.6, Vector 0.21	5.7+	Fluentd, Vector
Kafka	Kafka 0.11	Kafka 2.4.1, 2.7.0, 3.3.1	5.4+	Fluentd, Vector
Loki	REST over HTTP and HTTPS	2.3.0, 2.5.0, 2.7, 2.2.1	5.4+	Fluentd, Vector
Splunk	HEC	8.2.9, 9.0.0	5.7+	Vector
Syslog	RFC3164, RFC5424	Rsyslog 8.37.0-9.el7, rsyslog-8.39.0	5.4+	Fluentd, Vector ^[2]
Amazon CloudWatch	REST over HTTPS	Latest	5.4+	Fluentd, Vector

Fluentd does not support Elasticsearch 8 in the logging version 5.6.2.
Vector supports Syslog in the logging version 5.7 and higher.

11.2.2. Output type descriptions

default: The on-cluster, Red Hat managed log store. You are not required to configure the default output.
Note
If you configure a default output, you receive an error message, because the default output name is reserved for referencing the on-cluster, Red Hat managed log store.
loki: Loki, a horizontally scalable, highly available, multi-tenant log aggregation system.
kafka: A Kafka broker. The kafka output can use a TCP or TLS connection.
elasticsearch: An external Elasticsearch instance. The elasticsearch output can use a TLS connection.
fluentdForward: An external log aggregation solution that supports Fluentd. This option uses the Fluentd forward protocols. The fluentForward output can use a TCP or TLS connection and supports shared-key authentication by providing a shared_key field in a secret. Shared-key authentication can be used with or without TLS.
Important
The fluentdForward output is only supported if you are using the Fluentd collector. It is not supported if you are using the Vector collector. If you are using the Vector collector, you can forward logs to Fluentd by using the http output.
syslog: An external log aggregation solution that supports the syslog RFC3164 or RFC5424 protocols. The syslog output can use a UDP, TCP, or TLS connection.
cloudwatch: Amazon CloudWatch, a monitoring and log storage service hosted by Amazon Web Services (AWS).
cloudlogging: Google Cloud Logging, a monitoring and log storage service hosted by Google Cloud Platform (GCP).

11.3. Enabling JSON log forwarding

You can configure the Log Forwarding API to parse JSON strings into a structured object.

11.3.1. Parsing JSON logs

You can use a ClusterLogForwarder object to parse JSON logs into a structured object and forward them to a supported output.

To illustrate how this works, suppose that you have the following structured JSON log entry:

Example structured JSON log entry

{"level":"info","name":"fred","home":"bedrock"}

To enable parsing JSON log, you add parse: json to a pipeline in the ClusterLogForwarder CR, as shown in the following example:

Example snippet showing parse: json

pipelines:
- inputRefs: [ application ]
  outputRefs: myFluentd
  parse: json

When you enable parsing JSON logs by using parse: json, the CR copies the JSON-structured log entry in a structured field, as shown in the following example:

Example structured output containing the structured JSON log entry

{"structured": { "level": "info", "name": "fred", "home": "bedrock" },
 "more fields..."}

Important

If the log entry does not contain valid structured JSON, the structured field is absent.

11.3.2. Configuring JSON log data for Elasticsearch

If your JSON logs follow more than one schema, storing them in a single index might cause type conflicts and cardinality problems. To avoid that, you must configure the ClusterLogForwarder custom resource (CR) to group each schema into a single output definition. This way, each schema is forwarded to a separate index.

Important

If you forward JSON logs to the default Elasticsearch instance managed by OpenShift Logging, it generates new indices based on your configuration. To avoid performance issues associated with having too many indices, consider keeping the number of possible schemas low by standardizing to common schemas.

Structure types

You can use the following structure types in the ClusterLogForwarder CR to construct index names for the Elasticsearch log store:

structuredTypeKey is the name of a message field. The value of that field is used to construct the index name.
- kubernetes.labels.<key> is the Kubernetes pod label whose value is used to construct the index name.
- openshift.labels.<key> is the pipeline.label.<key> element in the ClusterLogForwarder CR whose value is used to construct the index name.
- kubernetes.container_name uses the container name to construct the index name.
structuredTypeName: If the structuredTypeKey field is not set or its key is not present, the structuredTypeName value is used as the structured type. When you use both the structuredTypeKey field and the structuredTypeName field together, the structuredTypeName value provides a fallback index name if the key in the structuredTypeKey field is missing from the JSON log data.

Note

Although you can set the value of structuredTypeKey to any field shown in the "Log Record Fields" topic, the most useful fields are shown in the preceding list of structure types.

A structuredTypeKey: kubernetes.labels.<key> example

Suppose the following:

Your cluster is running application pods that produce JSON logs in two different formats, "apache" and "google".
The user labels these application pods with logFormat=apache and logFormat=google.
You use the following snippet in your ClusterLogForwarder CR YAML file.

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
# ...
  outputDefaults:
    elasticsearch:
      structuredTypeKey: kubernetes.labels.logFormat 1
      structuredTypeName: nologformat
  pipelines:
  - inputRefs:
    - application
    outputRefs:
    - default
    parse: json 2

1: Uses the value of the key-value pair that is formed by the Kubernetes logFormat label.
2: Enables parsing JSON logs.

In that case, the following structured log record goes to the app-apache-write index:

{
  "structured":{"name":"fred","home":"bedrock"},
  "kubernetes":{"labels":{"logFormat": "apache", ...}}
}

And the following structured log record goes to the app-google-write index:

{
  "structured":{"name":"wilma","home":"bedrock"},
  "kubernetes":{"labels":{"logFormat": "google", ...}}
}

A structuredTypeKey: openshift.labels.<key> example

Suppose that you use the following snippet in your ClusterLogForwarder CR YAML file.

outputDefaults:
 elasticsearch:
    structuredTypeKey: openshift.labels.myLabel 1
    structuredTypeName: nologformat
pipelines:
 - name: application-logs
   inputRefs:
   - application
   - audit
   outputRefs:
   - elasticsearch-secure
   - default
   parse: json
   labels:
     myLabel: myValue 2

1: Uses the value of the key-value pair that is formed by the OpenShift myLabel label.
2: The myLabel element gives its string value, myValue, to the structured log record.

In that case, the following structured log record goes to the app-myValue-write index:

{
  "structured":{"name":"fred","home":"bedrock"},
  "openshift":{"labels":{"myLabel": "myValue", ...}}
}

Additional considerations

The Elasticsearch index for structured records is formed by prepending "app-" to the structured type and appending "-write".
Unstructured records are not sent to the structured index. They are indexed as usual in the application, infrastructure, or audit indices.
If there is no non-empty structured type, forward an unstructured record with no structured field.

It is important not to overload Elasticsearch with too many indices. Only use distinct structured types for distinct log formats, not for each application or namespace. For example, most Apache applications use the same JSON log format and structured type, such as LogApache.

11.3.3. Forwarding JSON logs to the Elasticsearch log store

For an Elasticsearch log store, if your JSON log entries follow different schemas, configure the ClusterLogForwarder custom resource (CR) to group each JSON schema into a single output definition. This way, Elasticsearch uses a separate index for each schema.

Important

Because forwarding different schemas to the same index can cause type conflicts and cardinality problems, you must perform this configuration before you forward data to the Elasticsearch store.

To avoid performance issues associated with having too many indices, consider keeping the number of possible schemas low by standardizing to common schemas.

Procedure

Add the following snippet to your ClusterLogForwarder CR YAML file.

outputDefaults:
 elasticsearch:
    structuredTypeKey: <log record field>
    structuredTypeName: <name>
pipelines:
- inputRefs:
  - application
  outputRefs: default
  parse: json

Use structuredTypeKey field to specify one of the log record fields.
Use structuredTypeName field to specify a name.
Important
To parse JSON logs, you must set both the structuredTypeKey and structuredTypeName fields.
For inputRefs, specify which log types to forward by using that pipeline, such as application, infrastructure, or audit.
Add the parse: json element to pipelines.
Create the CR object:
```
$ oc create -f <filename>.yaml
```
The Red Hat OpenShift Logging Operator redeploys the collector pods. However, if they do not redeploy, delete the collector pods to force them to redeploy.
```
$ oc delete pod --selector logging-infra=collector
```

11.3.4. Forwarding JSON logs from containers in the same pod to separate indices

You can forward structured logs from different containers within the same pod to different indices. To use this feature, you must configure the pipeline with multi-container support and annotate the pods. Logs are written to indices with a prefix of app-. It is recommended that Elasticsearch be configured with aliases to accommodate this.

Important

JSON formatting of logs varies by application. Because creating too many indices impacts performance, limit your use of this feature to creating indices for logs that have incompatible JSON formats. Use queries to separate logs from different namespaces, or applications with compatible JSON formats.

Prerequisites

Logging for Red Hat OpenShift: 5.5

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR object:

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputDefaults:
    elasticsearch:
      structuredTypeKey: kubernetes.labels.logFormat 1
      structuredTypeName: nologformat
      enableStructuredContainerLogs: true 2
  pipelines:
  - inputRefs:
    - application
    name: application-logs
    outputRefs:
    - default
    parse: json

1: Uses the value of the key-value pair that is formed by the Kubernetes logFormat label.
2: Enables multi-container outputs.

Create or edit a YAML file that defines the Pod CR object:

apiVersion: v1
kind: Pod
metadata:
  annotations:
    containerType.logging.openshift.io/heavy: heavy 1
    containerType.logging.openshift.io/low: low
spec:
  containers:
  - name: heavy 2
    image: heavyimage
  - name: low
    image: lowimage

1: Format: containerType.logging.openshift.io/<container-name>: <index>
2: Annotation names must match container names

Warning

This configuration might significantly increase the number of shards on the cluster.

Additional resources

Kubernetes Annotations

Additional resources

About log forwarding

11.4. Configuring log forwarding

In a logging deployment, container and infrastructure logs are forwarded to the internal log store defined in the ClusterLogging custom resource (CR) by default.

Audit logs are not forwarded to the internal log store by default because this does not provide secure storage. You are responsible for ensuring that the system to which you forward audit logs is compliant with your organizational and governmental regulations, and is properly secured.

If this default configuration meets your needs, you do not need to configure a ClusterLogForwarder CR. If a ClusterLogForwarder CR exists, logs are not forwarded to the internal log store unless a pipeline is defined that contains the default output.

11.4.1. About forwarding logs to third-party systems

To send logs to specific endpoints inside and outside your OpenShift Container Platform cluster, you specify a combination of outputs and pipelines in a ClusterLogForwarder custom resource (CR). You can also use inputs to forward the application logs associated with a specific project to an endpoint. Authentication is provided by a Kubernetes Secret object.

pipeline

Defines simple routing from one log type to one or more outputs, or which logs you want to send. The log types are one of the following:

application. Container logs generated by user applications running in the cluster, except infrastructure container applications.
infrastructure. Container logs from pods that run in the openshift*, kube*, or default projects and journal logs sourced from node file system.
audit. Audit logs generated by the node audit system, auditd, Kubernetes API server, OpenShift API server, and OVN network.

You can add labels to outbound log messages by using key:value pairs in the pipeline. For example, you might add a label to messages that are forwarded to other data centers or label the logs by type. Labels that are added to objects are also forwarded with the log message.

input

Forwards the application logs associated with a specific project to a pipeline.

In the pipeline, you define which log types to forward using an inputRef parameter and where to forward the logs to using an outputRef parameter.

Secret

A key:value map that contains confidential data such as user credentials.

Note the following:

If you do not define a pipeline for a log type, the logs of the undefined types are dropped. For example, if you specify a pipeline for the application and audit types, but do not specify a pipeline for the infrastructure type, infrastructure logs are dropped.
You can use multiple types of outputs in the ClusterLogForwarder custom resource (CR) to send logs to servers that support different protocols.

The following example forwards the audit logs to a secure external Elasticsearch instance, the infrastructure logs to an insecure external Elasticsearch instance, the application logs to a Kafka broker, and the application logs from the my-apps-logs project to the internal Elasticsearch instance.

Sample log forwarding outputs and pipelines

apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
   - name: elasticsearch-secure 4
     type: "elasticsearch"
     url: https://elasticsearch.secure.com:9200
     secret:
        name: elasticsearch
   - name: elasticsearch-insecure 5
     type: "elasticsearch"
     url: http://elasticsearch.insecure.com:9200
   - name: kafka-app 6
     type: "kafka"
     url: tls://kafka.secure.com:9093/app-topic
  inputs: 7
   - name: my-app-logs
     application:
        namespaces:
        - my-project
  pipelines:
   - name: audit-logs 8
     inputRefs:
      - audit
     outputRefs:
      - elasticsearch-secure
      - default
     labels:
       secure: "true" 9
       datacenter: "east"
   - name: infrastructure-logs 10
     inputRefs:
      - infrastructure
     outputRefs:
      - elasticsearch-insecure
     labels:
       datacenter: "west"
   - name: my-app 11
     inputRefs:
      - my-app-logs
     outputRefs:
      - default
   - inputRefs: 12
      - application
     outputRefs:
      - kafka-app
     labels:
       datacenter: "south"

1

In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.

2

In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.

3

The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.

4

Configuration for an secure Elasticsearch output using a secret with a secure URL.

A name to describe the output.
The type of output: elasticsearch.
The secure URL and port of the Elasticsearch instance as a valid absolute URL, including the prefix.
The secret required by the endpoint for TLS communication. The secret must exist in the openshift-logging project.

5

Configuration for an insecure Elasticsearch output:

A name to describe the output.
The type of output: elasticsearch.
The insecure URL and port of the Elasticsearch instance as a valid absolute URL, including the prefix.

6

Configuration for a Kafka output using a client-authenticated TLS communication over a secure URL:

A name to describe the output.
The type of output: kafka.
Specify the URL and port of the Kafka broker as a valid absolute URL, including the prefix.

7

Configuration for an input to filter application logs from the my-project namespace.

8

Configuration for a pipeline to send audit logs to the secure external Elasticsearch instance:

A name to describe the pipeline.
The inputRefs is the log type, in this example audit.
The outputRefs is the name of the output to use, in this example elasticsearch-secure to forward to the secure Elasticsearch instance and default to forward to the internal Elasticsearch instance.
Optional: Labels to add to the logs.

9

Optional: String. One or more labels to add to the logs. Quote values like "true" so they are recognized as string values, not as a boolean.

10

Configuration for a pipeline to send infrastructure logs to the insecure external Elasticsearch instance.

11

Configuration for a pipeline to send logs from the my-project project to the internal Elasticsearch instance.

A name to describe the pipeline.
The inputRefs is a specific input: my-app-logs.
The outputRefs is default.
Optional: String. One or more labels to add to the logs.

12

Configuration for a pipeline to send logs to the Kafka broker, with no pipeline name:

The inputRefs is the log type, in this example application.
The outputRefs is the name of the output to use.
Optional: String. One or more labels to add to the logs.

Fluentd log handling when the external log aggregator is unavailable

If your external logging aggregator becomes unavailable and cannot receive logs, Fluentd continues to collect logs and stores them in a buffer. When the log aggregator becomes available, log forwarding resumes, including the buffered logs. If the buffer fills completely, Fluentd stops collecting logs. OpenShift Container Platform rotates the logs and deletes them. You cannot adjust the buffer size or add a persistent volume claim (PVC) to the Fluentd daemon set or pods.

Supported Authorization Keys

Common key types are provided here. Some output types support additional specialized keys, documented with the output-specific configuration field. All secret keys are optional. Enable the security features you want by setting the relevant keys. You are responsible for creating and maintaining any additional configurations that external destinations might require, such as keys and secrets, service accounts, port openings, or global proxy configuration. Open Shift Logging will not attempt to verify a mismatch between authorization combinations.

Transport Layer Security (TLS)

Using a TLS URL (http://... or ssl://...) without a secret enables basic TLS server-side authentication. Additional TLS features are enabled by including a secret and setting the following optional fields:

passphrase: (string) Passphrase to decode an encoded TLS private key. Requires tls.key.
ca-bundle.crt: (string) File name of a customer CA for server authentication.

Username and Password

username: (string) Authentication user name. Requires password.
password: (string) Authentication password. Requires username.

Simple Authentication Security Layer (SASL)

sasl.enable (boolean) Explicitly enable or disable SASL. If missing, SASL is automatically enabled when any of the other sasl. keys are set.
sasl.mechanisms: (array) List of allowed SASL mechanism names. If missing or empty, the system defaults are used.
sasl.allow-insecure: (boolean) Allow mechanisms that send clear-text passwords. Defaults to false.

11.4.1.1. Creating a Secret

You can create a secret in the directory that contains your certificate and key files by using the following command:

$ oc create secret generic -n <namespace> <secret_name> \
  --from-file=ca-bundle.crt=<your_bundle_file> \
  --from-literal=username=<your_username> \
  --from-literal=password=<your_password>

Note

Generic or opaque secrets are recommended for best results.

11.4.2. Creating a log forwarder

To create a log forwarder, you must create a ClusterLogForwarder CR that specifies the log input types that the service account can collect. You can also specify which outputs the logs can be forwarded to. If you are using the multi log forwarder feature, you must also reference the service account in the ClusterLogForwarder CR.

If you are using the multi log forwarder feature on your cluster, you can create ClusterLogForwarder custom resources (CRs) in any namespace, using any name. If you are using a legacy implementation, the ClusterLogForwarder CR must be named instance, and must be created in the openshift-logging namespace.

Important

You need administrator permissions for the namespace where you create the ClusterLogForwarder CR.

ClusterLogForwarder resource example

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  pipelines:
   - inputRefs:
     - <log_type> 4
     outputRefs:
     - <output_name> 5
  outputs:
  - name: <output_name> 6
    type: <output_type> 7
    url: <log_output_url> 8
# ...

1: In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2: In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3: The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4: The log types that are collected. The value for this field can be audit for audit logs, application for application logs, infrastructure for infrastructure logs, or a named input that has been defined for your application.
5 7: The type of output that you want to forward logs to. The value of this field can be default, loki, kafka, elasticsearch, fluentdForward, syslog, or cloudwatch.
Note
The default output type is not supported in mutli log forwarder implementations.
6: A name for the output that you want to forward logs to.
8: The URL of the output that you want to forward logs to.

11.4.3. Tuning log payloads and delivery

In logging 5.9 and newer versions, the tuning spec in the ClusterLogForwarder custom resource (CR) provides a means of configuring your deployment to prioritize either throughput or durability of logs.

For example, if you need to reduce the possibility of log loss when the collector restarts, or you require collected log messages to survive a collector restart to support regulatory mandates, you can tune your deployment to prioritize log durability. If you use outputs that have hard limitations on the size of batches they can receive, you may want to tune your deployment to prioritize log throughput.

Important

To use this feature, your logging deployment must be configured to use the Vector collector. The tuning spec in the ClusterLogForwarder CR is not supported when using the Fluentd collector.

The following example shows the ClusterLogForwarder CR options that you can modify to tune log forwarder outputs:

Example ClusterLogForwarder CR tuning options

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  tuning:
    delivery: AtLeastOnce 1
    compression: none 2
    maxWrite: <integer> 3
    minRetryDuration: 1s 4
    maxRetryDuration: 1s 5
# ...

1

Specify the delivery mode for log forwarding.

AtLeastOnce delivery means that if the log forwarder crashes or is restarted, any logs that were read before the crash but not sent to their destination are re-sent. It is possible that some logs are duplicated after a crash.
AtMostOnce delivery means that the log forwarder makes no effort to recover logs lost during a crash. This mode gives better throughput, but may result in greater log loss.

2

Specifying a compression configuration causes data to be compressed before it is sent over the network. Note that not all output types support compression, and if the specified compression type is not supported by the output, this results in an error. The possible values for this configuration are none for no compression, gzip, snappy, zlib, or zstd. lz4 compression is also available if you are using a Kafka output. See the table "Supported compression types for tuning outputs" for more information.

3

Specifies a limit for the maximum payload of a single send operation to the output.

4

Specifies a minimum duration to wait between attempts before retrying delivery after a failure. This value is a string, and can be specified as milliseconds (ms), seconds (s), or minutes (m).

5

Specifies a maximum duration to wait between attempts before retrying delivery after a failure. This value is a string, and can be specified as milliseconds (ms), seconds (s), or minutes (m).

Table 11.9. Supported compression types for tuning outputs
Compression algorithm	Splunk	Amazon Cloudwatch	Elasticsearch 8	LokiStack	Apache Kafka	HTTP
`gzip`	X	X	X	X		X
`snappy`		X		X	X	X
`zlib`		X	X			X
`zstd`		X			X	X
`lz4`					X

11.4.4. Enabling multi-line exception detection

Enables multi-line error detection of container logs.

Warning

Enabling this feature could have performance implications and may require additional computing resources or alternate logging solutions.

Log parsers often incorrectly identify separate lines of the same exception as separate exceptions. This leads to extra log entries and an incomplete or inaccurate view of the traced information.

Example java exception

java.lang.NullPointerException: Cannot invoke "String.toString()" because "<param1>" is null
    at testjava.Main.handle(Main.java:47)
    at testjava.Main.printMe(Main.java:19)
    at testjava.Main.main(Main.java:10)

To enable logging to detect multi-line exceptions and reassemble them into a single log entry, ensure that the ClusterLogForwarder Custom Resource (CR) contains a detectMultilineErrors field, with a value of true.

Example ClusterLogForwarder CR

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  pipelines:
    - name: my-app-logs
      inputRefs:
        - application
      outputRefs:
        - default
      detectMultilineErrors: true

11.4.4.1. Details

Table 11.10. Supported languages per collector
Language	Fluentd	Vector
Java	✓	✓
JS	✓	✓
Ruby	✓	✓
Python	✓	✓
Golang	✓	✓
PHP	✓	✓
Dart	✓	✓

11.4.4.2. Troubleshooting

When enabled, the collector configuration will include a new section with type: detect_exceptions

Example vector configuration section

[transforms.detect_exceptions_app-logs]
 type = "detect_exceptions"
 inputs = ["application"]
 languages = ["All"]
 group_by = ["kubernetes.namespace_name","kubernetes.pod_name","kubernetes.container_name"]
 expire_after_ms = 2000
 multiline_flush_interval_ms = 1000

Example fluentd config section

<label @MULTILINE_APP_LOGS>
  <match kubernetes.**>
    @type detect_exceptions
    remove_tag_prefix 'kubernetes'
    message message
    force_line_breaks true
    multiline_flush_interval .2
  </match>
</label>

11.4.5. Forwarding logs to Google Cloud Platform (GCP)

You can forward logs to Google Cloud Logging in addition to, or instead of, the internal default OpenShift Container Platform log store.

Note

Using this feature with Fluentd is not supported.

Prerequisites

Red Hat OpenShift Logging Operator 5.5.1 and later

Procedure

Create a secret using your Google service account key.

$ oc -n openshift-logging create secret generic gcp-secret --from-file google-application-credentials.json=<your_service_account_key_file.json>

Create a ClusterLogForwarder Custom Resource YAML using the template below:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
    - name: gcp-1
      type: googleCloudLogging
      secret:
        name: gcp-secret
      googleCloudLogging:
        projectId : "openshift-gce-devel" 4
        logId : "app-gcp" 5
  pipelines:
    - name: test-app
      inputRefs: 6
        - application
      outputRefs:
        - gcp-1
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Set a projectId, folderId, organizationId, or billingAccountId field and its corresponding value, depending on where you want to store your logs in the GCP resource hierarchy.
5
Set the value to add to the logName field of the Log Entry.
6
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.

Additional resources

11.4.6. Forwarding logs to Splunk

You can forward logs to the Splunk HTTP Event Collector (HEC) in addition to, or instead of, the internal default OpenShift Container Platform log store.

Note

Using this feature with Fluentd is not supported.

Prerequisites

Red Hat OpenShift Logging Operator 5.6 or later
A ClusterLogging instance with vector specified as the collector
Base64 encoded Splunk HEC token

Procedure

Create a secret using your Base64 encoded Splunk HEC token.

$ oc -n openshift-logging create secret generic vector-splunk-secret --from-literal hecToken=<HEC_Token>

Create or edit the ClusterLogForwarder Custom Resource (CR) using the template below:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
    - name: splunk-receiver 4
      secret:
        name: vector-splunk-secret 5
      type: splunk 6
      url: <http://your.splunk.hec.url:8088> 7
  pipelines: 8
    - inputRefs:
        - application
        - infrastructure
      name: 9
      outputRefs:
        - splunk-receiver 10
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Specify a name for the output.
5
Specify the name of the secret that contains your HEC token.
6
Specify the output type as splunk.
7
Specify the URL (including port) of your Splunk HEC.
8
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
9
Optional: Specify a name for the pipeline.
10
Specify the name of the output to use when forwarding logs with this pipeline.

11.4.7. Forwarding logs over HTTP

Forwarding logs over HTTP is supported for both the Fluentd and Vector log collectors. To enable, specify http as the output type in the ClusterLogForwarder custom resource (CR).

Procedure

Create or edit the ClusterLogForwarder CR using the template below:
Example ClusterLogForwarder CR
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
    - name: httpout-app
      type: http
      url: 4
      http:
        headers: 5
          h1: v1
          h2: v2
        method: POST
      secret:
        name: 6
      tls:
        insecureSkipVerify: 7
  pipelines:
    - name:
      inputRefs:
        - application
      outputRefs:
        - 8
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Destination address for logs.
5
Additional headers to send with the log record.
6
Secret name for destination credentials.
7
Values are either true or false.
8
This value should be the same as the output name.

11.4.8. Forwarding to Azure Monitor Logs

With logging 5.9 and later, you can forward logs to Azure Monitor Logs in addition to, or instead of, the default log store. This functionality is provided by the Vector Azure Monitor Logs sink.

Prerequisites

You are familiar with how to administer and create a ClusterLogging custom resource (CR) instance.
You are familiar with how to administer and create a ClusterLogForwarder CR instance.
You understand the ClusterLogForwarder CR specifications.
You have basic familiarity with Azure services.
You have an Azure account configured for Azure Portal or Azure CLI access.
You have obtained your Azure Monitor Logs primary or the secondary security key.
You have determined which log types to forward.

To enable log forwarding to Azure Monitor Logs via the HTTP Data Collector API:

Create a secret with your shared key:

apiVersion: v1
kind: Secret
metadata:
  name: my-secret
  namespace: openshift-logging
type: Opaque
data:
  shared_key: <your_shared_key> 1

1: Must contain a primary or secondary key for the Log Analytics workspace making the request.

To obtain a shared key, you can use this command in Azure CLI:

Get-AzOperationalInsightsWorkspaceSharedKey -ResourceGroupName "<resource_name>" -Name "<workspace_name>”

Create or edit your ClusterLogForwarder CR using the template matching your log selection.

Forward all logs

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogForwarder"
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
  - name: azure-monitor
    type: azureMonitor
    azureMonitor:
      customerId: my-customer-id 1
      logType: my_log_type 2
    secret:
       name: my-secret
  pipelines:
  - name: app-pipeline
    inputRefs:
    - application
    outputRefs:
    - azure-monitor

1: Unique identifier for the Log Analytics workspace. Required field.
2: Azure record type of the data being submitted. May only contain letters, numbers, and underscores (_), and may not exceed 100 characters.

Forward application and infrastructure logs

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogForwarder"
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
  - name: azure-monitor-app
    type: azureMonitor
    azureMonitor:
      customerId: my-customer-id
      logType: application_log 1
    secret:
      name: my-secret
  - name: azure-monitor-infra
    type: azureMonitor
    azureMonitor:
      customerId: my-customer-id
      logType: infra_log #
    secret:
      name: my-secret
  pipelines:
    - name: app-pipeline
      inputRefs:
      - application
      outputRefs:
      - azure-monitor-app
    - name: infra-pipeline
      inputRefs:
      - infrastructure
      outputRefs:
      - azure-monitor-infra

1: Azure record type of the data being submitted. May only contain letters, numbers, and underscores (_), and may not exceed 100 characters.

Advanced configuration options

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogForwarder"
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
  - name: azure-monitor
    type: azureMonitor
    azureMonitor:
      customerId: my-customer-id
      logType: my_log_type
      azureResourceId: "/subscriptions/111111111" 1
      host: "ods.opinsights.azure.com" 2
    secret:
       name: my-secret
  pipelines:
  - name: app-pipeline
    inputRefs:
    - application
    outputRefs:
    - azure-monitor

1: Resource ID of the Azure resource the data should be associated with. Optional field.
2: Alternative host for dedicated Azure regions. Optional field. Default value is ods.opinsights.azure.com. Default value for Azure Government is ods.opinsights.azure.us.

11.4.9. Forwarding application logs from specific projects

You can forward a copy of the application logs from specific projects to an external log aggregator, in addition to, or instead of, using the internal log store. You must also configure the external log aggregator to receive log data from OpenShift Container Platform.

To configure forwarding application logs from a project, you must create a ClusterLogForwarder custom resource (CR) with at least one input from a project, optional outputs for other log aggregators, and pipelines that use those inputs and outputs.

Prerequisites

You must have a logging server that is configured to receive the logging data using the specified protocol or format.

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR:
Example ClusterLogForwarder CR
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance 1
  namespace: openshift-logging 2
spec:
  outputs:
   - name: fluentd-server-secure 3
     type: fluentdForward 4
     url: 'tls://fluentdserver.security.example.com:24224' 5
     secret: 6
        name: fluentd-secret
   - name: fluentd-server-insecure
     type: fluentdForward
     url: 'tcp://fluentdserver.home.example.com:24224'
  inputs: 7
   - name: my-app-logs
     application:
        namespaces:
        - my-project 8
  pipelines:
   - name: forward-to-fluentd-insecure 9
     inputRefs: 10
     - my-app-logs
     outputRefs: 11
     - fluentd-server-insecure
     labels:
       project: "my-project" 12
   - name: forward-to-fluentd-secure 13
     inputRefs:
     - application 14
     - audit
     - infrastructure
     outputRefs:
     - fluentd-server-secure
     - default
     labels:
       clusterId: "C1234"
```
1
The name of the ClusterLogForwarder CR must be instance.
2
The namespace for the ClusterLogForwarder CR must be openshift-logging.
3
The name of the output.
4
The output type: elasticsearch, fluentdForward, syslog, or kafka.
5
The URL and port of the external log aggregator as a valid absolute URL. If the cluster-wide proxy using the CIDR annotation is enabled, the output must be a server name or FQDN, not an IP address.
6
If using a tls prefix, you must specify the name of the secret required by the endpoint for TLS communication. The secret must exist in the openshift-logging project and have tls.crt, tls.key, and ca-bundle.crt keys that each point to the certificates they represent.
7
The configuration for an input to filter application logs from the specified projects.
8
If no namespace is specified, logs are collected from all namespaces.
9
The pipeline configuration directs logs from a named input to a named output. In this example, a pipeline named forward-to-fluentd-insecure forwards logs from an input named my-app-logs to an output named fluentd-server-insecure.
10
A list of inputs.
11
The name of the output to use.
12
Optional: String. One or more labels to add to the logs.
13
Configuration for a pipeline to send logs to other log aggregators.
Optional: Specify a name for the pipeline.
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
Specify the name of the output to use when forwarding logs with this pipeline.
Optional: Specify the default output to forward logs to the default log store.
Optional: String. One or more labels to add to the logs.
14
Note that application logs from all namespaces are collected when using this configuration.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

11.4.10. Forwarding application logs from specific pods

As a cluster administrator, you can use Kubernetes pod labels to gather log data from specific pods and forward it to a log collector.

Suppose that you have an application composed of pods running alongside other pods in various namespaces. If those pods have labels that identify the application, you can gather and output their log data to a specific log collector.

To specify the pod labels, you use one or more matchLabels key-value pairs. If you specify multiple key-value pairs, the pods must match all of them to be selected.

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR object. In the file, specify the pod labels using simple equality-based selectors under inputs[].name.application.selector.matchLabels, as shown in the following example.
Example ClusterLogForwarder CR YAML file
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  pipelines:
    - inputRefs: [ myAppLogData ] 3
      outputRefs: [ default ] 4
  inputs: 5
    - name: myAppLogData
      application:
        selector:
          matchLabels: 6
            environment: production
            app: nginx
        namespaces: 7
        - app1
        - app2
  outputs: 8
    - <output_name>
    ...
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
Specify one or more comma-separated values from inputs[].name.
4
Specify one or more comma-separated values from outputs[].
5
Define a unique inputs[].name for each application that has a unique set of pod labels.
6
Specify the key-value pairs of pod labels whose log data you want to gather. You must specify both a key and value, not just a key. To be selected, the pods must match all the key-value pairs.
7
Optional: Specify one or more namespaces.
8
Specify one or more outputs to forward your log data to.
Optional: To restrict the gathering of log data to specific namespaces, use inputs[].name.application.namespaces, as shown in the preceding example.
Optional: You can send log data from additional applications that have different pod labels to the same pipeline.
1. For each unique combination of pod labels, create an additional inputs[].name section similar to the one shown.
2. Update the selectors to match the pod labels of this application.
3. Add the new inputs[].name value to inputRefs. For example:
```
- inputRefs: [ myAppLogData, myOtherAppLogData ]
```
Create the CR object:
```
$ oc create -f <file-name>.yaml
```

Additional resources

For more information on matchLabels in Kubernetes, see Resources that support set-based requirements.

11.4.11. Overview of API audit filter

OpenShift API servers generate audit events for each API call, detailing the request, response, and the identity of the requester, leading to large volumes of data. The API Audit filter uses rules to enable the exclusion of non-essential events and the reduction of event size, facilitating a more manageable audit trail. Rules are checked in order, checking stops at the first match. How much data is included in an event is determined by the value of the level field:

None: The event is dropped.
Metadata: Audit metadata is included, request and response bodies are removed.
Request: Audit metadata and the request body are included, the response body is removed.
RequestResponse: All data is included: metadata, request body and response body. The response body can be very large. For example, oc get pods -A generates a response body containing the YAML description of every pod in the cluster.

Note

You can use this feature only if the Vector collector is set up in your logging deployment.

In logging 5.8 and later, the ClusterLogForwarder custom resource (CR) uses the same format as the standard Kubernetes audit policy, while providing the following additional functions:

Wildcards

Names of users, groups, namespaces, and resources can have a leading or trailing * asterisk character. For example, namespace openshift-\* matches openshift-apiserver or openshift-authentication. Resource \*/status matches Pod/status or Deployment/status.

Default Rules

Events that do not match any rule in the policy are filtered as follows:

Read-only system events such as get, list, watch are dropped.
Service account write events that occur within the same namespace as the service account are dropped.
All other events are forwarded, subject to any configured rate limits.

To disable these defaults, either end your rules list with a rule that has only a level field or add an empty rule.

Omit Response Codes: A list of integer status codes to omit. You can drop events based on the HTTP status code in the response by using the OmitResponseCodes field, a list of HTTP status code for which no events are created. The default value is [404, 409, 422, 429]. If the value is an empty list, [], then no status codes are omitted.

The ClusterLogForwarder CR audit policy acts in addition to the OpenShift Container Platform audit policy. The ClusterLogForwarder CR audit filter changes what the log collector forwards, and provides the ability to filter by verb, user, group, namespace, or resource. You can create multiple filters to send different summaries of the same audit stream to different places. For example, you can send a detailed stream to the local cluster log store, and a less detailed stream to a remote site.

Note

The example provided is intended to illustrate the range of rules possible in an audit policy and is not a recommended configuration.

Example audit policy

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  pipelines:
    - name: my-pipeline
      inputRefs: audit 1
      filterRefs: my-policy 2
      outputRefs: default
  filters:
    - name: my-policy
      type: kubeAPIAudit
      kubeAPIAudit:
        # Don't generate audit events for all requests in RequestReceived stage.
        omitStages:
          - "RequestReceived"

        rules:
          # Log pod changes at RequestResponse level
          - level: RequestResponse
            resources:
            - group: ""
              resources: ["pods"]

          # Log "pods/log", "pods/status" at Metadata level
          - level: Metadata
            resources:
            - group: ""
              resources: ["pods/log", "pods/status"]

          # Don't log requests to a configmap called "controller-leader"
          - level: None
            resources:
            - group: ""
              resources: ["configmaps"]
              resourceNames: ["controller-leader"]

          # Don't log watch requests by the "system:kube-proxy" on endpoints or services
          - level: None
            users: ["system:kube-proxy"]
            verbs: ["watch"]
            resources:
            - group: "" # core API group
              resources: ["endpoints", "services"]

          # Don't log authenticated requests to certain non-resource URL paths.
          - level: None
            userGroups: ["system:authenticated"]
            nonResourceURLs:
            - "/api*" # Wildcard matching.
            - "/version"

          # Log the request body of configmap changes in kube-system.
          - level: Request
            resources:
            - group: "" # core API group
              resources: ["configmaps"]
            # This rule only applies to resources in the "kube-system" namespace.
            # The empty string "" can be used to select non-namespaced resources.
            namespaces: ["kube-system"]

          # Log configmap and secret changes in all other namespaces at the Metadata level.
          - level: Metadata
            resources:
            - group: "" # core API group
              resources: ["secrets", "configmaps"]

          # Log all other resources in core and extensions at the Request level.
          - level: Request
            resources:
            - group: "" # core API group
            - group: "extensions" # Version of group should NOT be included.

          # A catch-all rule to log all other requests at the Metadata level.
          - level: Metadata

1: The log types that are collected. The value for this field can be audit for audit logs, application for application logs, infrastructure for infrastructure logs, or a named input that has been defined for your application.
2: The name of your audit policy.

Additional resources

Logging network policy events[Logging for egress firewall and network policy rules]

11.4.12. Forwarding logs to an external Loki logging system

You can forward logs to an external Loki logging system in addition to, or instead of, the default log store.

To configure log forwarding to Loki, you must create a ClusterLogForwarder custom resource (CR) with an output to Loki, and a pipeline that uses the output. The output to Loki can use the HTTP (insecure) or HTTPS (secure HTTP) connection.

Prerequisites

You must have a Loki logging system running at the URL you specify with the url field in the CR.

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR object:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
  - name: loki-insecure 4
    type: "loki" 5
    url: http://loki.insecure.com:3100 6
    loki:
      tenantKey: kubernetes.namespace_name
      labelKeys:
      - kubernetes.labels.foo
  - name: loki-secure 7
    type: "loki"
    url: https://loki.secure.com:3100
    secret:
      name: loki-secret 8
    loki:
      tenantKey: kubernetes.namespace_name 9
      labelKeys:
      - kubernetes.labels.foo 10
  pipelines:
  - name: application-logs 11
    inputRefs:  12
    - application
    - audit
    outputRefs: 13
    - loki-secure
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Specify a name for the output.
5
Specify the type as "loki".
6
Specify the URL and port of the Loki system as a valid absolute URL. You can use the http (insecure) or https (secure HTTP) protocol. If the cluster-wide proxy using the CIDR annotation is enabled, the output must be a server name or FQDN, not an IP Address. Loki’s default port for HTTP(S) communication is 3100.
7
For a secure connection, you can specify an https or http URL that you authenticate by specifying a secret.
8
For an https prefix, specify the name of the secret required by the endpoint for TLS communication. The secret must contain a ca-bundle.crt key that points to the certificates it represents. Otherwise, for http and https prefixes, you can specify a secret that contains a username and password. In legacy implementations, the secret must exist in the openshift-logging project. For more information, see the following "Example: Setting a secret that contains a username and password."
9
Optional: Specify a metadata key field to generate values for the TenantID field in Loki. For example, setting tenantKey: kubernetes.namespace_name uses the names of the Kubernetes namespaces as values for tenant IDs in Loki. To see which other log record fields you can specify, see the "Log Record Fields" link in the following "Additional resources" section.
10
Optional: Specify a list of metadata field keys to replace the default Loki labels. Loki label names must match the regular expression [a-zA-Z_:][a-zA-Z0-9_:]*. Illegal characters in metadata keys are replaced with _ to form the label name. For example, the kubernetes.labels.foo metadata key becomes Loki label kubernetes_labels_foo. If you do not set labelKeys, the default value is: [log_type, kubernetes.namespace_name, kubernetes.pod_name, kubernetes_host]. Keep the set of labels small because Loki limits the size and number of labels allowed. See Configuring Loki, limits_config. You can still query based on any log record field using query filters.
11
Optional: Specify a name for the pipeline.
12
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
13
Specify the name of the output to use when forwarding logs with this pipeline.
Note
Because Loki requires log streams to be correctly ordered by timestamp, labelKeys always includes the kubernetes_host label set, even if you do not specify it. This inclusion ensures that each stream originates from a single host, which prevents timestamps from becoming disordered due to clock differences on different hosts.
Apply the ClusterLogForwarder CR object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Additional resources

Configuring Loki server

11.4.13. Forwarding logs to an external Elasticsearch instance

You can forward logs to an external Elasticsearch instance in addition to, or instead of, the internal log store. You are responsible for configuring the external log aggregator to receive log data from OpenShift Container Platform.

To configure log forwarding to an external Elasticsearch instance, you must create a ClusterLogForwarder custom resource (CR) with an output to that instance, and a pipeline that uses the output. The external Elasticsearch output can use the HTTP (insecure) or HTTPS (secure HTTP) connection.

To forward logs to both an external and the internal Elasticsearch instance, create outputs and pipelines to the external instance and a pipeline that uses the default output to forward logs to the internal instance.

Note

If you only want to forward logs to an internal Elasticsearch instance, you do not need to create a ClusterLogForwarder CR.

Prerequisites

You must have a logging server that is configured to receive the logging data using the specified protocol or format.

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR:
Example ClusterLogForwarder CR
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
   - name: elasticsearch-example 4
     type: elasticsearch 5
     elasticsearch:
       version: 8 6
     url: http://elasticsearch.example.com:9200 7
     secret:
       name: es-secret 8
  pipelines:
   - name: application-logs 9
     inputRefs: 10
     - application
     - audit
     outputRefs:
     - elasticsearch-example 11
     - default 12
     labels:
       myLabel: "myValue" 13
# ...
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Specify a name for the output.
5
Specify the elasticsearch type.
6
Specify the Elasticsearch version. This can be 6, 7, or 8.
7
Specify the URL and port of the external Elasticsearch instance as a valid absolute URL. You can use the http (insecure) or https (secure HTTP) protocol. If the cluster-wide proxy using the CIDR annotation is enabled, the output must be a server name or FQDN, not an IP Address.
8
For an https prefix, specify the name of the secret required by the endpoint for TLS communication. The secret must contain a ca-bundle.crt key that points to the certificate it represents. Otherwise, for http and https prefixes, you can specify a secret that contains a username and password. In legacy implementations, the secret must exist in the openshift-logging project. For more information, see the following "Example: Setting a secret that contains a username and password."
9
Optional: Specify a name for the pipeline.
10
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
11
Specify the name of the output to use when forwarding logs with this pipeline.
12
Optional: Specify the default output to send the logs to the internal Elasticsearch instance.
13
Optional: String. One or more labels to add to the logs.
Apply the ClusterLogForwarder CR:
```
$ oc apply -f <filename>.yaml
```

Example: Setting a secret that contains a username and password

You can use a secret that contains a username and password to authenticate a secure connection to an external Elasticsearch instance.

For example, if you cannot use mutual TLS (mTLS) keys because a third party operates the Elasticsearch instance, you can use HTTP or HTTPS and set a secret that contains the username and password.

Create a Secret YAML file similar to the following example. Use base64-encoded values for the username and password fields. The secret type is opaque by default.
```
apiVersion: v1
kind: Secret
metadata:
  name: openshift-test-secret
data:
  username: <username>
  password: <password>
# ...
```

Create the secret:

$ oc create secret -n openshift-logging openshift-test-secret.yaml

Specify the name of the secret in the ClusterLogForwarder CR:

kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
   - name: elasticsearch
     type: "elasticsearch"
     url: https://elasticsearch.secure.com:9200
     secret:
        name: openshift-test-secret
# ...

Note

In the value of the url field, the prefix can be http or https.

Apply the CR object:
```
$ oc apply -f <filename>.yaml
```

11.4.14. Forwarding logs using the Fluentd forward protocol

You can use the Fluentd forward protocol to send a copy of your logs to an external log aggregator that is configured to accept the protocol instead of, or in addition to, the default Elasticsearch log store. You are responsible for configuring the external log aggregator to receive the logs from OpenShift Container Platform.

To configure log forwarding using the forward protocol, you must create a ClusterLogForwarder custom resource (CR) with one or more outputs to the Fluentd servers, and pipelines that use those outputs. The Fluentd output can use a TCP (insecure) or TLS (secure TCP) connection.

Prerequisites

You must have a logging server that is configured to receive the logging data using the specified protocol or format.

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR object:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance 1
  namespace: openshift-logging 2
spec:
  outputs:
   - name: fluentd-server-secure 3
     type: fluentdForward 4
     url: 'tls://fluentdserver.security.example.com:24224' 5
     secret: 6
        name: fluentd-secret
   - name: fluentd-server-insecure
     type: fluentdForward
     url: 'tcp://fluentdserver.home.example.com:24224'
  pipelines:
   - name: forward-to-fluentd-secure 7
     inputRefs:  8
     - application
     - audit
     outputRefs:
     - fluentd-server-secure 9
     - default 10
     labels:
       clusterId: "C1234" 11
   - name: forward-to-fluentd-insecure 12
     inputRefs:
     - infrastructure
     outputRefs:
     - fluentd-server-insecure
     labels:
       clusterId: "C1234"
```
1
The name of the ClusterLogForwarder CR must be instance.
2
The namespace for the ClusterLogForwarder CR must be openshift-logging.
3
Specify a name for the output.
4
Specify the fluentdForward type.
5
Specify the URL and port of the external Fluentd instance as a valid absolute URL. You can use the tcp (insecure) or tls (secure TCP) protocol. If the cluster-wide proxy using the CIDR annotation is enabled, the output must be a server name or FQDN, not an IP address.
6
If you are using a tls prefix, you must specify the name of the secret required by the endpoint for TLS communication. The secret must exist in the openshift-logging project and must contain a ca-bundle.crt key that points to the certificate it represents.
7
Optional: Specify a name for the pipeline.
8
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
9
Specify the name of the output to use when forwarding logs with this pipeline.
10
Optional: Specify the default output to forward logs to the internal Elasticsearch instance.
11
Optional: String. One or more labels to add to the logs.
12
Optional: Configure multiple outputs to forward logs to other external log aggregators of any supported type:
A name to describe the pipeline.
The inputRefs is the log type to forward by using the pipeline: application, infrastructure, or audit.
The outputRefs is the name of the output to use.
Optional: String. One or more labels to add to the logs.
Create the CR object:
```
$ oc create -f <file-name>.yaml
```

11.4.14.1. Enabling nanosecond precision for Logstash to ingest data from fluentd

For Logstash to ingest log data from fluentd, you must enable nanosecond precision in the Logstash configuration file.

Procedure

In the Logstash configuration file, set nanosecond_precision to true.

Example Logstash configuration file

input { tcp { codec => fluent { nanosecond_precision => true } port => 24114 } }
filter { }
output { stdout { codec => rubydebug } }

11.4.15. Forwarding logs using the syslog protocol

You can use the syslog RFC3164 or RFC5424 protocol to send a copy of your logs to an external log aggregator that is configured to accept the protocol instead of, or in addition to, the default Elasticsearch log store. You are responsible for configuring the external log aggregator, such as a syslog server, to receive the logs from OpenShift Container Platform.

To configure log forwarding using the syslog protocol, you must create a ClusterLogForwarder custom resource (CR) with one or more outputs to the syslog servers, and pipelines that use those outputs. The syslog output can use a UDP, TCP, or TLS connection.

Prerequisites

You must have a logging server that is configured to receive the logging data using the specified protocol or format.

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR object:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
   - name: rsyslog-east 4
     type: syslog 5
     syslog: 6
       facility: local0
       rfc: RFC3164
       payloadKey: message
       severity: informational
     url: 'tls://rsyslogserver.east.example.com:514' 7
     secret: 8
        name: syslog-secret
   - name: rsyslog-west
     type: syslog
     syslog:
      appName: myapp
      facility: user
      msgID: mymsg
      procID: myproc
      rfc: RFC5424
      severity: debug
     url: 'tcp://rsyslogserver.west.example.com:514'
  pipelines:
   - name: syslog-east 9
     inputRefs: 10
     - audit
     - application
     outputRefs: 11
     - rsyslog-east
     - default 12
     labels:
       secure: "true" 13
       syslog: "east"
   - name: syslog-west 14
     inputRefs:
     - infrastructure
     outputRefs:
     - rsyslog-west
     - default
     labels:
       syslog: "west"
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Specify a name for the output.
5
Specify the syslog type.
6
Optional: Specify the syslog parameters, listed below.
7
Specify the URL and port of the external syslog instance. You can use the udp (insecure), tcp (insecure) or tls (secure TCP) protocol. If the cluster-wide proxy using the CIDR annotation is enabled, the output must be a server name or FQDN, not an IP address.
8
If using a tls prefix, you must specify the name of the secret required by the endpoint for TLS communication. The secret must contain a ca-bundle.crt key that points to the certificate it represents. In legacy implementations, the secret must exist in the openshift-logging project.
9
Optional: Specify a name for the pipeline.
10
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
11
Specify the name of the output to use when forwarding logs with this pipeline.
12
Optional: Specify the default output to forward logs to the internal Elasticsearch instance.
13
Optional: String. One or more labels to add to the logs. Quote values like "true" so they are recognized as string values, not as a boolean.
14
Optional: Configure multiple outputs to forward logs to other external log aggregators of any supported type:
A name to describe the pipeline.
The inputRefs is the log type to forward by using the pipeline: application, infrastructure, or audit.
The outputRefs is the name of the output to use.
Optional: String. One or more labels to add to the logs.
Create the CR object:
```
$ oc create -f <filename>.yaml
```

11.4.15.1. Adding log source information to message output

You can add namespace_name, pod_name, and container_name elements to the message field of the record by adding the AddLogSource field to your ClusterLogForwarder custom resource (CR).

  spec:
    outputs:
    - name: syslogout
      syslog:
        addLogSource: true
        facility: user
        payloadKey: message
        rfc: RFC3164
        severity: debug
        tag: mytag
      type: syslog
      url: tls://syslog-receiver.openshift-logging.svc:24224
    pipelines:
    - inputRefs:
      - application
      name: test-app
      outputRefs:
      - syslogout

Note

This configuration is compatible with both RFC3164 and RFC5424.

Example syslog message output without AddLogSource

<15>1 2020-11-15T17:06:14+00:00 fluentd-9hkb4 mytag - - -  {"msgcontent"=>"Message Contents", "timestamp"=>"2020-11-15 17:06:09", "tag_key"=>"rec_tag", "index"=>56}

Example syslog message output with AddLogSource

<15>1 2020-11-16T10:49:37+00:00 crc-j55b9-master-0 mytag - - -  namespace_name=clo-test-6327,pod_name=log-generator-ff9746c49-qxm7l,container_name=log-generator,message={"msgcontent":"My life is my message", "timestamp":"2020-11-16 10:49:36", "tag_key":"rec_tag", "index":76}

11.4.15.2. Syslog parameters

You can configure the following for the syslog outputs. For more information, see the syslog RFC3164 or RFC5424 RFC.

facility: The syslog facility. The value can be a decimal integer or a case-insensitive keyword:
- 0 or kern for kernel messages
- 1 or user for user-level messages, the default.
- 2 or mail for the mail system
- 3 or daemon for system daemons
- 4 or auth for security/authentication messages
- 5 or syslog for messages generated internally by syslogd
- 6 or lpr for the line printer subsystem
- 7 or news for the network news subsystem
- 8 or uucp for the UUCP subsystem
- 9 or cron for the clock daemon
- 10 or authpriv for security authentication messages
- 11 or ftp for the FTP daemon
- 12 or ntp for the NTP subsystem
- 13 or security for the syslog audit log
- 14 or console for the syslog alert log
- 15 or solaris-cron for the scheduling daemon
- 16–23 or local0 – local7 for locally used facilities
Optional: payloadKey: The record field to use as payload for the syslog message.
Note
Configuring the payloadKey parameter prevents other parameters from being forwarded to the syslog.
rfc: The RFC to be used for sending logs using syslog. The default is RFC5424.
severity: The syslog severity to set on outgoing syslog records. The value can be a decimal integer or a case-insensitive keyword:
- 0 or Emergency for messages indicating the system is unusable
- 1 or Alert for messages indicating action must be taken immediately
- 2 or Critical for messages indicating critical conditions
- 3 or Error for messages indicating error conditions
- 4 or Warning for messages indicating warning conditions
- 5 or Notice for messages indicating normal but significant conditions
- 6 or Informational for messages indicating informational messages
- 7 or Debug for messages indicating debug-level messages, the default
tag: Tag specifies a record field to use as a tag on the syslog message.
trimPrefix: Remove the specified prefix from the tag.

11.4.15.3. Additional RFC5424 syslog parameters

The following parameters apply to RFC5424:

appName: The APP-NAME is a free-text string that identifies the application that sent the log. Must be specified for RFC5424.
msgID: The MSGID is a free-text string that identifies the type of message. Must be specified for RFC5424.
procID: The PROCID is a free-text string. A change in the value indicates a discontinuity in syslog reporting. Must be specified for RFC5424.

11.4.16. Forwarding logs to a Kafka broker

You can forward logs to an external Kafka broker in addition to, or instead of, the default log store.

To configure log forwarding to an external Kafka instance, you must create a ClusterLogForwarder custom resource (CR) with an output to that instance, and a pipeline that uses the output. You can include a specific Kafka topic in the output or use the default. The Kafka output can use a TCP (insecure) or TLS (secure TCP) connection.

Procedure

Create or edit a YAML file that defines the ClusterLogForwarder CR object:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
   - name: app-logs 4
     type: kafka 5
     url: tls://kafka.example.devlab.com:9093/app-topic 6
     secret:
       name: kafka-secret 7
   - name: infra-logs
     type: kafka
     url: tcp://kafka.devlab2.example.com:9093/infra-topic 8
   - name: audit-logs
     type: kafka
     url: tls://kafka.qelab.example.com:9093/audit-topic
     secret:
        name: kafka-secret-qe
  pipelines:
   - name: app-topic 9
     inputRefs: 10
     - application
     outputRefs: 11
     - app-logs
     labels:
       logType: "application" 12
   - name: infra-topic 13
     inputRefs:
     - infrastructure
     outputRefs:
     - infra-logs
     labels:
       logType: "infra"
   - name: audit-topic
     inputRefs:
     - audit
     outputRefs:
     - audit-logs
     labels:
       logType: "audit"
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Specify a name for the output.
5
Specify the kafka type.
6
Specify the URL and port of the Kafka broker as a valid absolute URL, optionally with a specific topic. You can use the tcp (insecure) or tls (secure TCP) protocol. If the cluster-wide proxy using the CIDR annotation is enabled, the output must be a server name or FQDN, not an IP address.
7
If you are using a tls prefix, you must specify the name of the secret required by the endpoint for TLS communication. The secret must contain a ca-bundle.crt key that points to the certificate it represents. In legacy implementations, the secret must exist in the openshift-logging project.
8
Optional: To send an insecure output, use a tcp prefix in front of the URL. Also omit the secret key and its name from this output.
9
Optional: Specify a name for the pipeline.
10
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
11
Specify the name of the output to use when forwarding logs with this pipeline.
12
Optional: String. One or more labels to add to the logs.
13
Optional: Configure multiple outputs to forward logs to other external log aggregators of any supported type:
A name to describe the pipeline.
The inputRefs is the log type to forward by using the pipeline: application, infrastructure, or audit.
The outputRefs is the name of the output to use.
Optional: String. One or more labels to add to the logs.
Optional: To forward a single output to multiple Kafka brokers, specify an array of Kafka brokers as shown in the following example:
```
# ...
spec:
  outputs:
  - name: app-logs
    type: kafka
    secret:
      name: kafka-secret-dev
    kafka:  1
      brokers: 2
        - tls://kafka-broker1.example.com:9093/
        - tls://kafka-broker2.example.com:9093/
      topic: app-topic 3
# ...
```
1
Specify a kafka key that has a brokers and topic key.
2
Use the brokers key to specify an array of one or more brokers.
3
Use the topic key to specify the target topic that receives the logs.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

11.4.17. Forwarding logs to Amazon CloudWatch

You can forward logs to Amazon CloudWatch, a monitoring and log storage service hosted by Amazon Web Services (AWS). You can forward logs to CloudWatch in addition to, or instead of, the default log store.

To configure log forwarding to CloudWatch, you must create a ClusterLogForwarder custom resource (CR) with an output for CloudWatch, and a pipeline that uses the output.

Procedure

Create a Secret YAML file that uses the aws_access_key_id and aws_secret_access_key fields to specify your base64-encoded AWS credentials. For example:

apiVersion: v1
kind: Secret
metadata:
  name: cw-secret
  namespace: openshift-logging
data:
  aws_access_key_id: QUtJQUlPU0ZPRE5ON0VYQU1QTEUK
  aws_secret_access_key: d0phbHJYVXRuRkVNSS9LN01ERU5HL2JQeFJmaUNZRVhBTVBMRUtFWQo=

Create the secret. For example:
```
$ oc apply -f cw-secret.yaml
```
Create or edit a YAML file that defines the ClusterLogForwarder CR object. In the file, specify the name of the secret. For example:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: <service_account_name> 3
  outputs:
   - name: cw 4
     type: cloudwatch 5
     cloudwatch:
       groupBy: logType 6
       groupPrefix: <group prefix> 7
       region: us-east-2 8
     secret:
        name: cw-secret 9
  pipelines:
    - name: infra-logs 10
      inputRefs: 11
        - infrastructure
        - audit
        - application
      outputRefs:
        - cw 12
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
The name of your service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Specify a name for the output.
5
Specify the cloudwatch type.
6
Optional: Specify how to group the logs:
logType creates log groups for each log type.
namespaceName creates a log group for each application name space. It also creates separate log groups for infrastructure and audit logs.
namespaceUUID creates a new log groups for each application namespace UUID. It also creates separate log groups for infrastructure and audit logs.
7
Optional: Specify a string to replace the default infrastructureName prefix in the names of the log groups.
8
Specify the AWS region.
9
Specify the name of the secret that contains your AWS credentials.
10
Optional: Specify a name for the pipeline.
11
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
12
Specify the name of the output to use when forwarding logs with this pipeline.
Create the CR object:
```
$ oc create -f <file-name>.yaml
```

Example: Using ClusterLogForwarder with Amazon CloudWatch

Here, you see an example ClusterLogForwarder custom resource (CR) and the log data that it outputs to Amazon CloudWatch.

Suppose that you are running an OpenShift Container Platform cluster named mycluster. The following command returns the cluster’s infrastructureName, which you will use to compose aws commands later on:

$ oc get Infrastructure/cluster -ojson | jq .status.infrastructureName
"mycluster-7977k"

To generate log data for this example, you run a busybox pod in a namespace called app. The busybox pod writes a message to stdout every three seconds:

$ oc run busybox --image=busybox -- sh -c 'while true; do echo "My life is my message"; sleep 3; done'
$ oc logs -f busybox
My life is my message
My life is my message
My life is my message
...

You can look up the UUID of the app namespace where the busybox pod runs:

$ oc get ns/app -ojson | jq .metadata.uid
"794e1e1a-b9f5-4958-a190-e76a9b53d7bf"

In your ClusterLogForwarder custom resource (CR), you configure the infrastructure, audit, and application log types as inputs to the all-logs pipeline. You also connect this pipeline to cw output, which forwards the logs to a CloudWatch instance in the us-east-2 region:

apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
   - name: cw
     type: cloudwatch
     cloudwatch:
       groupBy: logType
       region: us-east-2
     secret:
        name: cw-secret
  pipelines:
    - name: all-logs
      inputRefs:
        - infrastructure
        - audit
        - application
      outputRefs:
        - cw

Each region in CloudWatch contains three levels of objects:

log group
- log stream
  - log event

With groupBy: logType in the ClusterLogForwarding CR, the three log types in the inputRefs produce three log groups in Amazon Cloudwatch:

$ aws --output json logs describe-log-groups | jq .logGroups[].logGroupName
"mycluster-7977k.application"
"mycluster-7977k.audit"
"mycluster-7977k.infrastructure"

Each of the log groups contains log streams:

$ aws --output json logs describe-log-streams --log-group-name mycluster-7977k.application | jq .logStreams[].logStreamName
"kubernetes.var.log.containers.busybox_app_busybox-da085893053e20beddd6747acdbaf98e77c37718f85a7f6a4facf09ca195ad76.log"

$ aws --output json logs describe-log-streams --log-group-name mycluster-7977k.audit | jq .logStreams[].logStreamName
"ip-10-0-131-228.us-east-2.compute.internal.k8s-audit.log"
"ip-10-0-131-228.us-east-2.compute.internal.linux-audit.log"
"ip-10-0-131-228.us-east-2.compute.internal.openshift-audit.log"
...

$ aws --output json logs describe-log-streams --log-group-name mycluster-7977k.infrastructure | jq .logStreams[].logStreamName
"ip-10-0-131-228.us-east-2.compute.internal.kubernetes.var.log.containers.apiserver-69f9fd9b58-zqzw5_openshift-oauth-apiserver_oauth-apiserver-453c5c4ee026fe20a6139ba6b1cdd1bed25989c905bf5ac5ca211b7cbb5c3d7b.log"
"ip-10-0-131-228.us-east-2.compute.internal.kubernetes.var.log.containers.apiserver-797774f7c5-lftrx_openshift-apiserver_openshift-apiserver-ce51532df7d4e4d5f21c4f4be05f6575b93196336be0027067fd7d93d70f66a4.log"
"ip-10-0-131-228.us-east-2.compute.internal.kubernetes.var.log.containers.apiserver-797774f7c5-lftrx_openshift-apiserver_openshift-apiserver-check-endpoints-82a9096b5931b5c3b1d6dc4b66113252da4a6472c9fff48623baee761911a9ef.log"
...

Each log stream contains log events. To see a log event from the busybox Pod, you specify its log stream from the application log group:

$ aws logs get-log-events --log-group-name mycluster-7977k.application --log-stream-name kubernetes.var.log.containers.busybox_app_busybox-da085893053e20beddd6747acdbaf98e77c37718f85a7f6a4facf09ca195ad76.log
{
    "events": [
        {
            "timestamp": 1629422704178,
            "message": "{\"docker\":{\"container_id\":\"da085893053e20beddd6747acdbaf98e77c37718f85a7f6a4facf09ca195ad76\"},\"kubernetes\":{\"container_name\":\"busybox\",\"namespace_name\":\"app\",\"pod_name\":\"busybox\",\"container_image\":\"docker.io/library/busybox:latest\",\"container_image_id\":\"docker.io/library/busybox@sha256:0f354ec1728d9ff32edcd7d1b8bbdfc798277ad36120dc3dc683be44524c8b60\",\"pod_id\":\"870be234-90a3-4258-b73f-4f4d6e2777c7\",\"host\":\"ip-10-0-216-3.us-east-2.compute.internal\",\"labels\":{\"run\":\"busybox\"},\"master_url\":\"https://kubernetes.default.svc\",\"namespace_id\":\"794e1e1a-b9f5-4958-a190-e76a9b53d7bf\",\"namespace_labels\":{\"kubernetes_io/metadata_name\":\"app\"}},\"message\":\"My life is my message\",\"level\":\"unknown\",\"hostname\":\"ip-10-0-216-3.us-east-2.compute.internal\",\"pipeline_metadata\":{\"collector\":{\"ipaddr4\":\"10.0.216.3\",\"inputname\":\"fluent-plugin-systemd\",\"name\":\"fluentd\",\"received_at\":\"2021-08-20T01:25:08.085760+00:00\",\"version\":\"1.7.4 1.6.0\"}},\"@timestamp\":\"2021-08-20T01:25:04.178986+00:00\",\"viaq_index_name\":\"app-write\",\"viaq_msg_id\":\"NWRjZmUyMWQtZjgzNC00MjI4LTk3MjMtNTk3NmY3ZjU4NDk1\",\"log_type\":\"application\",\"time\":\"2021-08-20T01:25:04+00:00\"}",
            "ingestionTime": 1629422744016
        },
...

Example: Customizing the prefix in log group names

In the log group names, you can replace the default infrastructureName prefix, mycluster-7977k, with an arbitrary string like demo-group-prefix. To make this change, you update the groupPrefix field in the ClusterLogForwarding CR:

cloudwatch:
    groupBy: logType
    groupPrefix: demo-group-prefix
    region: us-east-2

The value of groupPrefix replaces the default infrastructureName prefix:

$ aws --output json logs describe-log-groups | jq .logGroups[].logGroupName
"demo-group-prefix.application"
"demo-group-prefix.audit"
"demo-group-prefix.infrastructure"

Example: Naming log groups after application namespace names

For each application namespace in your cluster, you can create a log group in CloudWatch whose name is based on the name of the application namespace.

If you delete an application namespace object and create a new one that has the same name, CloudWatch continues using the same log group as before.

If you consider successive application namespace objects that have the same name as equivalent to each other, use the approach described in this example. Otherwise, if you need to distinguish the resulting log groups from each other, see the following "Naming log groups for application namespace UUIDs" section instead.

To create application log groups whose names are based on the names of the application namespaces, you set the value of the groupBy field to namespaceName in the ClusterLogForwarder CR:

cloudwatch:
    groupBy: namespaceName
    region: us-east-2

Setting groupBy to namespaceName affects the application log group only. It does not affect the audit and infrastructure log groups.

In Amazon Cloudwatch, the namespace name appears at the end of each log group name. Because there is a single application namespace, "app", the following output shows a new mycluster-7977k.app log group instead of mycluster-7977k.application:

$ aws --output json logs describe-log-groups | jq .logGroups[].logGroupName
"mycluster-7977k.app"
"mycluster-7977k.audit"
"mycluster-7977k.infrastructure"

If the cluster in this example had contained multiple application namespaces, the output would show multiple log groups, one for each namespace.

The groupBy field affects the application log group only. It does not affect the audit and infrastructure log groups.

Example: Naming log groups after application namespace UUIDs

For each application namespace in your cluster, you can create a log group in CloudWatch whose name is based on the UUID of the application namespace.

If you delete an application namespace object and create a new one, CloudWatch creates a new log group.

If you consider successive application namespace objects with the same name as different from each other, use the approach described in this example. Otherwise, see the preceding "Example: Naming log groups for application namespace names" section instead.

To name log groups after application namespace UUIDs, you set the value of the groupBy field to namespaceUUID in the ClusterLogForwarder CR:

cloudwatch:
    groupBy: namespaceUUID
    region: us-east-2

In Amazon Cloudwatch, the namespace UUID appears at the end of each log group name. Because there is a single application namespace, "app", the following output shows a new mycluster-7977k.794e1e1a-b9f5-4958-a190-e76a9b53d7bf log group instead of mycluster-7977k.application:

$ aws --output json logs describe-log-groups | jq .logGroups[].logGroupName
"mycluster-7977k.794e1e1a-b9f5-4958-a190-e76a9b53d7bf" // uid of the "app" namespace
"mycluster-7977k.audit"
"mycluster-7977k.infrastructure"

The groupBy field affects the application log group only. It does not affect the audit and infrastructure log groups.

11.4.18. Creating a secret for AWS CloudWatch with an existing AWS role

If you have an existing role for AWS, you can create a secret for AWS with STS using the oc create secret --from-literal command.

Procedure

In the CLI, enter the following to generate a secret for AWS:

$ oc create secret generic cw-sts-secret -n openshift-logging --from-literal=role_arn=arn:aws:iam::123456789012:role/my-role_with-permissions

Example Secret

apiVersion: v1
kind: Secret
metadata:
  namespace: openshift-logging
  name: my-secret-name
stringData:
  role_arn: arn:aws:iam::123456789012:role/my-role_with-permissions

11.4.19. Forwarding logs to Amazon CloudWatch from STS enabled clusters

For clusters with AWS Security Token Service (STS) enabled, you can create an AWS service account manually or create a credentials request by using the Cloud Credential Operator (CCO) utility ccoctl.

Prerequisites

Logging for Red Hat OpenShift: 5.5 and later

Procedure

Create a CredentialsRequest custom resource YAML by using the template below:

CloudWatch credentials request template

apiVersion: cloudcredential.openshift.io/v1
kind: CredentialsRequest
metadata:
  name: <your_role_name>-credrequest
  namespace: openshift-cloud-credential-operator
spec:
  providerSpec:
    apiVersion: cloudcredential.openshift.io/v1
    kind: AWSProviderSpec
    statementEntries:
      - action:
          - logs:PutLogEvents
          - logs:CreateLogGroup
          - logs:PutRetentionPolicy
          - logs:CreateLogStream
          - logs:DescribeLogGroups
          - logs:DescribeLogStreams
        effect: Allow
        resource: arn:aws:logs:*:*:*
  secretRef:
    name: <your_role_name>
    namespace: openshift-logging
  serviceAccountNames:
    - logcollector

Use the ccoctl command to create a role for AWS using your CredentialsRequest CR. With the CredentialsRequest object, this ccoctl command creates an IAM role with a trust policy that is tied to the specified OIDC identity provider, and a permissions policy that grants permissions to perform operations on CloudWatch resources. This command also creates a YAML configuration file in /<path_to_ccoctl_output_dir>/manifests/openshift-logging-<your_role_name>-credentials.yaml. This secret file contains the role_arn key/value used during authentication with the AWS IAM identity provider.
```
$ ccoctl aws create-iam-roles \
--name=<name> \
--region=<aws_region> \
--credentials-requests-dir=<path_to_directory_with_list_of_credentials_requests>/credrequests \
--identity-provider-arn=arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com 1
```
1
<name> is the name used to tag your cloud resources and should match the name used during your STS cluster install

Apply the secret created:

$ oc apply -f output/manifests/openshift-logging-<your_role_name>-credentials.yaml

Create or edit a ClusterLogForwarder custom resource:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: <log_forwarder_name> 1
  namespace: <log_forwarder_namespace> 2
spec:
  serviceAccountName: clf-collector 3
  outputs:
   - name: cw 4
     type: cloudwatch 5
     cloudwatch:
       groupBy: logType 6
       groupPrefix: <group prefix> 7
       region: us-east-2 8
     secret:
        name: <your_secret_name> 9
  pipelines:
    - name: to-cloudwatch 10
      inputRefs: 11
        - infrastructure
        - audit
        - application
      outputRefs:
        - cw 12
```
1
In legacy implementations, the CR name must be instance. In multi log forwarder implementations, you can use any name.
2
In legacy implementations, the CR namespace must be openshift-logging. In multi log forwarder implementations, you can use any namespace.
3
Specify the clf-collector service account. The service account is only required in multi log forwarder implementations if the log forwarder is not deployed in the openshift-logging namespace.
4
Specify a name for the output.
5
Specify the cloudwatch type.
6
Optional: Specify how to group the logs:
logType creates log groups for each log type.
namespaceName creates a log group for each application name space. Infrastructure and audit logs are unaffected, remaining grouped by logType.
namespaceUUID creates a new log groups for each application namespace UUID. It also creates separate log groups for infrastructure and audit logs.
7
Optional: Specify a string to replace the default infrastructureName prefix in the names of the log groups.
8
Specify the AWS region.
9
Specify the name of the secret that contains your AWS credentials.
10
Optional: Specify a name for the pipeline.
11
Specify which log types to forward by using the pipeline: application, infrastructure, or audit.
12
Specify the name of the output to use when forwarding logs with this pipeline.

Additional resources

11.5. Configuring the logging collector

Logging for Red Hat OpenShift collects operations and application logs from your cluster and enriches the data with Kubernetes pod and project metadata. All supported modifications to the log collector can be performed though the spec.collection stanza in the ClusterLogging custom resource (CR).

11.5.1. Configuring the log collector

You can configure which log collector type your logging uses by modifying the ClusterLogging custom resource (CR).

Note

Prerequisites

You have administrator permissions.
You have installed the OpenShift CLI (oc).
You have installed the Red Hat OpenShift Logging Operator.
You have created a ClusterLogging CR.

Procedure

Modify the ClusterLogging CR collection spec:

ClusterLogging CR example

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
# ...
spec:
# ...
  collection:
    type: <log_collector_type> 1
    resources: {}
    tolerations: {}
# ...

1: The log collector type you want to use for the logging. This can be vector or fluentd.

Apply the ClusterLogging CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

11.5.2. Creating a LogFileMetricExporter resource

In logging version 5.8 and newer versions, the LogFileMetricExporter is no longer deployed with the collector by default. You must manually create a LogFileMetricExporter custom resource (CR) to generate metrics from the logs produced by running containers.

If you do not create the LogFileMetricExporter CR, you may see a No datapoints found message in the OpenShift Container Platform web console dashboard for Produced Logs.

Prerequisites

You have administrator permissions.
You have installed the Red Hat OpenShift Logging Operator.
You have installed the OpenShift CLI (oc).

Procedure

Create a LogFileMetricExporter CR as a YAML file:
Example LogFileMetricExporter CR
```
apiVersion: logging.openshift.io/v1alpha1
kind: LogFileMetricExporter
metadata:
  name: instance
  namespace: openshift-logging
spec:
  nodeSelector: {} 1
  resources: 2
    limits:
      cpu: 500m
      memory: 256Mi
    requests:
      cpu: 200m
      memory: 128Mi
  tolerations: [] 3
# ...
```
1
Optional: The nodeSelector stanza defines which nodes the pods are scheduled on.
2
The resources stanza defines resource requirements for the LogFileMetricExporter CR.
3
Optional: The tolerations stanza defines the tolerations that the pods accept.
Apply the LogFileMetricExporter CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

Verification

A logfilesmetricexporter pod runs concurrently with a collector pod on each node.

Verify that the logfilesmetricexporter pods are running in the namespace where you have created the LogFileMetricExporter CR, by running the following command and observing the output:

$ oc get pods -l app.kubernetes.io/component=logfilesmetricexporter -n openshift-logging

Example output

NAME                           READY   STATUS    RESTARTS   AGE
logfilesmetricexporter-9qbjj   1/1     Running   0          2m46s
logfilesmetricexporter-cbc4v   1/1     Running   0          2m46s

11.5.3. Configure log collector CPU and memory limits

The log collector allows for adjustments to both the CPU and memory limits.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:

$ oc -n openshift-logging edit ClusterLogging instance

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance
  namespace: openshift-logging
spec:
  collection:
    type: fluentd
    resources:
      limits: 1
        memory: 736Mi
      requests:
        cpu: 100m
        memory: 736Mi
# ...

1: Specify the CPU and memory limits and requests as needed. The values shown are the default values.

11.5.4. Configuring input receivers

The Red Hat OpenShift Logging Operator deploys a service for each configured input receiver so that clients can write to the collector. This service exposes the port specified for the input receiver. The service name is generated based on the following:

For multi log forwarder ClusterLogForwarder CR deployments, the service name is in the format <ClusterLogForwarder_CR_name>-<input_name>. For example, example-http-receiver.
For legacy ClusterLogForwarder CR deployments, meaning those named instance and located in the openshift-logging namespace, the service name is in the format collector-<input_name>. For example, collector-http-receiver.

11.5.4.1. Configuring the collector to receive audit logs as an HTTP server

You can configure your log collector to listen for HTTP connections and receive audit logs as an HTTP server by specifying http as a receiver input in the ClusterLogForwarder custom resource (CR). This enables you to use a common log store for audit logs that are collected from both inside and outside of your OpenShift Container Platform cluster.

Prerequisites

You have administrator permissions.
You have installed the OpenShift CLI (oc).
You have installed the Red Hat OpenShift Logging Operator.
You have created a ClusterLogForwarder CR.

Procedure

Modify the ClusterLogForwarder CR to add configuration for the http receiver input:
Example ClusterLogForwarder CR if you are using a multi log forwarder deployment
```
apiVersion: logging.openshift.io/v1beta1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  serviceAccountName: <service_account_name>
  inputs:
    - name: http-receiver 1
      receiver:
        type: http 2
        http:
          format: kubeAPIAudit 3
          port: 8443 4
  pipelines: 5
    - name: http-pipeline
      inputRefs:
        - http-receiver
# ...
```
1
Specify a name for your input receiver.
2
Specify the input receiver type as http.
3
Currently, only the kube-apiserver webhook format is supported for http input receivers.
4
Optional: Specify the port that the input receiver listens on. This must be a value between 1024 and 65535. The default value is 8443 if this is not specified.
5
Configure a pipeline for your input receiver.
Example ClusterLogForwarder CR if you are using a legacy deployment
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  inputs:
    - name: http-receiver 1
      receiver:
        type: http 2
        http:
          format: kubeAPIAudit 3
          port: 8443 4
  pipelines: 5
  - inputRefs:
    - http-receiver
    name: http-pipeline
# ...
```
1
Specify a name for your input receiver.
2
Specify the input receiver type as http.
3
Currently, only the kube-apiserver webhook format is supported for http input receivers.
4
Optional: Specify the port that the input receiver listens on. This must be a value between 1024 and 65535. The default value is 8443 if this is not specified.
5
Configure a pipeline for your input receiver.
Apply the changes to the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

Additional resources

Overview of API audit filter

11.5.5. Advanced configuration for the Fluentd log forwarder

Note

Logging includes multiple Fluentd parameters that you can use for tuning the performance of the Fluentd log forwarder. With these parameters, you can change the following Fluentd behaviors:

Chunk and chunk buffer sizes
Chunk flushing behavior
Chunk forwarding retry behavior

Fluentd collects log data in a single blob called a chunk. When Fluentd creates a chunk, the chunk is considered to be in the stage, where the chunk gets filled with data. When the chunk is full, Fluentd moves the chunk to the queue, where chunks are held before being flushed, or written out to their destination. Fluentd can fail to flush a chunk for a number of reasons, such as network issues or capacity issues at the destination. If a chunk cannot be flushed, Fluentd retries flushing as configured.

By default in OpenShift Container Platform, Fluentd uses the exponential backoff method to retry flushing, where Fluentd doubles the time it waits between attempts to retry flushing again, which helps reduce connection requests to the destination. You can disable exponential backoff and use the periodic retry method instead, which retries flushing the chunks at a specified interval.

These parameters can help you determine the trade-offs between latency and throughput.

To optimize Fluentd for throughput, you could use these parameters to reduce network packet count by configuring larger buffers and queues, delaying flushes, and setting longer times between retries. Be aware that larger buffers require more space on the node file system.
To optimize for low latency, you could use the parameters to send data as soon as possible, avoid the build-up of batches, have shorter queues and buffers, and use more frequent flush and retries.

You can configure the chunking and flushing behavior using the following parameters in the ClusterLogging custom resource (CR). The parameters are then automatically added to the Fluentd config map for use by Fluentd.

Note

These parameters are:

Not relevant to most users. The default settings should give good general performance.
Only for advanced users with detailed knowledge of Fluentd configuration and performance.
Only for performance tuning. They have no effect on functional aspects of logging.

Table 11.11. Advanced Fluentd Configuration Parameters
Parameter	Description	Default
`chunkLimitSize`	The maximum size of each chunk. Fluentd stops writing data to a chunk when it reaches this size. Then, Fluentd sends the chunk to the queue and opens a new chunk.	`8m`
`totalLimitSize`	The maximum size of the buffer, which is the total size of the stage and the queue. If the buffer size exceeds this value, Fluentd stops adding data to chunks and fails with an error. All data not in chunks is lost.	Approximately 15% of the node disk distributed across all outputs.
`flushInterval`	The interval between chunk flushes. You can use `s` (seconds), `m` (minutes), `h` (hours), or `d` (days).	`1s`
`flushMode`	The method to perform flushes: `lazy`: Flush chunks based on the `timekey` parameter. You cannot modify the `timekey` parameter. `interval`: Flush chunks based on the `flushInterval` parameter. `immediate`: Flush chunks immediately after data is added to a chunk.	`interval`
`flushThreadCount`	The number of threads that perform chunk flushing. Increasing the number of threads improves the flush throughput, which hides network latency.	`2`
`overflowAction`	The chunking behavior when the queue is full: `throw_exception`: Raise an exception to show in the log. `block`: Stop data chunking until the full buffer issue is resolved. `drop_oldest_chunk`: Drop the oldest chunk to accept new incoming chunks. Older chunks have less value than newer chunks.	`block`
`retryMaxInterval`	The maximum time in seconds for the `exponential_backoff` retry method.	`300s`
`retryType`	The retry method when flushing fails: `exponential_backoff`: Increase the time between flush retries. Fluentd doubles the time it waits until the next retry until the `retry_max_interval` parameter is reached. `periodic`: Retries flushes periodically, based on the `retryWait` parameter.	`exponential_backoff`
`retryTimeOut`	The maximum time interval to attempt retries before the record is discarded.	`60m`
`retryWait`	The time in seconds before the next chunk flush.	`1s`

For more information on the Fluentd chunk lifecycle, see Buffer Plugins in the Fluentd documentation.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:
```
$ oc edit ClusterLogging instance
```
Add or modify any of the following parameters:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance
  namespace: openshift-logging
spec:
  collection:
    fluentd:
      buffer:
        chunkLimitSize: 8m 1
        flushInterval: 5s 2
        flushMode: interval 3
        flushThreadCount: 3 4
        overflowAction: throw_exception 5
        retryMaxInterval: "300s" 6
        retryType: periodic 7
        retryWait: 1s 8
        totalLimitSize: 32m 9
# ...
```
1
Specify the maximum size of each chunk before it is queued for flushing.
2
Specify the interval between chunk flushes.
3
Specify the method to perform chunk flushes: lazy, interval, or immediate.
4
Specify the number of threads to use for chunk flushes.
5
Specify the chunking behavior when the queue is full: throw_exception, block, or drop_oldest_chunk.
6
Specify the maximum interval in seconds for the exponential_backoff chunk flushing method.
7
Specify the retry type when chunk flushing fails: exponential_backoff or periodic.
8
Specify the time in seconds before the next chunk flush.
9
Specify the maximum size of the chunk buffer.

Verify that the Fluentd pods are redeployed:

$ oc get pods -l component=collector -n openshift-logging

Check that the new values are in the fluentd config map:

$ oc extract configmap/collector-config --confirm

Example fluentd.conf

<buffer>
  @type file
  path '/var/lib/fluentd/default'
  flush_mode interval
  flush_interval 5s
  flush_thread_count 3
  retry_type periodic
  retry_wait 1s
  retry_max_interval 300s
  retry_timeout 60m
  queued_chunks_limit_size "#{ENV['BUFFER_QUEUE_LIMIT'] || '32'}"
  total_limit_size "#{ENV['TOTAL_LIMIT_SIZE_PER_BUFFER'] || '8589934592'}"
  chunk_limit_size 8m
  overflow_action throw_exception
  disable_chunk_backup true
</buffer>

11.6. Collecting and storing Kubernetes events

The OpenShift Container Platform Event Router is a pod that watches Kubernetes events and logs them for collection by the logging. You must manually deploy the Event Router.

The Event Router collects events from all projects and writes them to STDOUT. The collector then forwards those events to the store defined in the ClusterLogForwarder custom resource (CR).

Important

The Event Router adds additional load to Fluentd and can impact the number of other log messages that can be processed.

11.6.1. Deploying and configuring the Event Router

Use the following steps to deploy the Event Router into your cluster. You should always deploy the Event Router to the openshift-logging project to ensure it collects events from across the cluster.

Note

The Event Router image is not a part of the Red Hat OpenShift Logging Operator and must be downloaded separately.

The following Template object creates the service account, cluster role, and cluster role binding required for the Event Router. The template also configures and deploys the Event Router pod. You can either use this template without making changes or edit the template to change the deployment object CPU and memory requests.

Prerequisites

You need proper permissions to create service accounts and update cluster role bindings. For example, you can run the following template with a user that has the cluster-admin role.
The Red Hat OpenShift Logging Operator must be installed.

Procedure

Create a template for the Event Router:

apiVersion: template.openshift.io/v1
kind: Template
metadata:
  name: eventrouter-template
  annotations:
    description: "A pod forwarding kubernetes events to OpenShift Logging stack."
    tags: "events,EFK,logging,cluster-logging"
objects:
  - kind: ServiceAccount 1
    apiVersion: v1
    metadata:
      name: eventrouter
      namespace: ${NAMESPACE}
  - kind: ClusterRole 2
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: event-reader
    rules:
    - apiGroups: [""]
      resources: ["events"]
      verbs: ["get", "watch", "list"]
  - kind: ClusterRoleBinding 3
    apiVersion: rbac.authorization.k8s.io/v1
    metadata:
      name: event-reader-binding
    subjects:
    - kind: ServiceAccount
      name: eventrouter
      namespace: ${NAMESPACE}
    roleRef:
      kind: ClusterRole
      name: event-reader
  - kind: ConfigMap 4
    apiVersion: v1
    metadata:
      name: eventrouter
      namespace: ${NAMESPACE}
    data:
      config.json: |-
        {
          "sink": "stdout"
        }
  - kind: Deployment 5
    apiVersion: apps/v1
    metadata:
      name: eventrouter
      namespace: ${NAMESPACE}
      labels:
        component: "eventrouter"
        logging-infra: "eventrouter"
        provider: "openshift"
    spec:
      selector:
        matchLabels:
          component: "eventrouter"
          logging-infra: "eventrouter"
          provider: "openshift"
      replicas: 1
      template:
        metadata:
          labels:
            component: "eventrouter"
            logging-infra: "eventrouter"
            provider: "openshift"
          name: eventrouter
        spec:
          serviceAccount: eventrouter
          containers:
            - name: kube-eventrouter
              image: ${IMAGE}
              imagePullPolicy: IfNotPresent
              resources:
                requests:
                  cpu: ${CPU}
                  memory: ${MEMORY}
              volumeMounts:
              - name: config-volume
                mountPath: /etc/eventrouter
              securityContext:
                allowPrivilegeEscalation: false
                capabilities:
                  drop: ["ALL"]
          securityContext:
            runAsNonRoot: true
            seccompProfile:
              type: RuntimeDefault
          volumes:
          - name: config-volume
            configMap:
              name: eventrouter
parameters:
  - name: IMAGE 6
    displayName: Image
    value: "registry.redhat.io/openshift-logging/eventrouter-rhel9:v0.4"
  - name: CPU 7
    displayName: CPU
    value: "100m"
  - name: MEMORY 8
    displayName: Memory
    value: "128Mi"
  - name: NAMESPACE
    displayName: Namespace
    value: "openshift-logging" 9

1: Creates a Service Account in the openshift-logging project for the Event Router.
2: Creates a ClusterRole to monitor for events in the cluster.
3: Creates a ClusterRoleBinding to bind the ClusterRole to the service account.
4: Creates a config map in the openshift-logging project to generate the required config.json file.
5: Creates a deployment in the openshift-logging project to generate and configure the Event Router pod.
6: Specifies the image, identified by a tag such as v0.4.
7: Specifies the minimum amount of CPU to allocate to the Event Router pod. Defaults to 100m.
8: Specifies the minimum amount of memory to allocate to the Event Router pod. Defaults to 128Mi.
9: Specifies the openshift-logging project to install objects in.

Use the following command to process and apply the template:

$ oc process -f <templatefile> | oc apply -n openshift-logging -f -

For example:

$ oc process -f eventrouter.yaml | oc apply -n openshift-logging -f -

Example output

serviceaccount/eventrouter created
clusterrole.rbac.authorization.k8s.io/event-reader created
clusterrolebinding.rbac.authorization.k8s.io/event-reader-binding created
configmap/eventrouter created
deployment.apps/eventrouter created

Validate that the Event Router installed in the openshift-logging project:

View the new Event Router pod:

$ oc get pods --selector  component=eventrouter -o name -n openshift-logging

Example output

pod/cluster-logging-eventrouter-d649f97c8-qvv8r

View the events collected by the Event Router:

$ oc logs <cluster_logging_eventrouter_pod> -n openshift-logging

For example:

$ oc logs cluster-logging-eventrouter-d649f97c8-qvv8r -n openshift-logging

Example output

{"verb":"ADDED","event":{"metadata":{"name":"openshift-service-catalog-controller-manager-remover.1632d931e88fcd8f","namespace":"openshift-service-catalog-removed","selfLink":"/api/v1/namespaces/openshift-service-catalog-removed/events/openshift-service-catalog-controller-manager-remover.1632d931e88fcd8f","uid":"787d7b26-3d2f-4017-b0b0-420db4ae62c0","resourceVersion":"21399","creationTimestamp":"2020-09-08T15:40:26Z"},"involvedObject":{"kind":"Job","namespace":"openshift-service-catalog-removed","name":"openshift-service-catalog-controller-manager-remover","uid":"fac9f479-4ad5-4a57-8adc-cb25d3d9cf8f","apiVersion":"batch/v1","resourceVersion":"21280"},"reason":"Completed","message":"Job completed","source":{"component":"job-controller"},"firstTimestamp":"2020-09-08T15:40:26Z","lastTimestamp":"2020-09-08T15:40:26Z","count":1,"type":"Normal"}}

You can also use Kibana to view events by creating an index pattern using the Elasticsearch infra index.

Chapter 12. Log storage

12.1. About log storage

You can use an internal Loki or Elasticsearch log store on your cluster for storing logs, or you can use a ClusterLogForwarder custom resource (CR) to forward logs to an external store.

12.1.1. Log storage types

Elasticsearch indexes incoming log records completely during ingestion. Loki indexes only a few fixed labels during ingestion and defers more complex parsing until after the logs have been stored. This means Loki can collect logs more quickly.

12.1.1.1. About the Elasticsearch log store

The logging Elasticsearch instance is optimized and tested for short term storage, approximately seven days. If you want to retain your logs over a longer term, it is recommended you move the data to a third-party storage system.

Elasticsearch organizes the log data from Fluentd into datastores, or indices, then subdivides each index into multiple pieces called shards, which it spreads across a set of Elasticsearch nodes in an Elasticsearch cluster. You can configure Elasticsearch to make copies of the shards, called replicas, which Elasticsearch also spreads across the Elasticsearch nodes. The ClusterLogging custom resource (CR) allows you to specify how the shards are replicated to provide data redundancy and resilience to failure. You can also specify how long the different types of logs are retained using a retention policy in the ClusterLogging CR.

Note

The number of primary shards for the index templates is equal to the number of Elasticsearch data nodes.

The Red Hat OpenShift Logging Operator and companion OpenShift Elasticsearch Operator ensure that each Elasticsearch node is deployed using a unique deployment that includes its own storage volume. You can use a ClusterLogging custom resource (CR) to increase the number of Elasticsearch nodes, as needed. See the Elasticsearch documentation for considerations involved in configuring storage.

Note

A highly-available Elasticsearch environment requires at least three Elasticsearch nodes, each on a different host.

Role-based access control (RBAC) applied on the Elasticsearch indices enables the controlled access of the logs to the developers. Administrators can access all logs and developers can access only the logs in their projects.

12.1.2. Querying log stores

You can query Loki by using the LogQL log query language.

12.1.3. Additional resources

12.2. Installing log storage

You can use the OpenShift CLI (oc) or the OpenShift Container Platform web console to deploy a log store on your OpenShift Container Platform cluster.

Note

12.2.1. Deploying a Loki log store

You can use the Loki Operator to deploy an internal Loki log store on your OpenShift Container Platform cluster. After install the Loki Operator, you must configure Loki object storage by creating a secret, and create a LokiStack custom resource (CR).

12.2.1.1. Loki deployment sizing

Sizing for Loki follows the format of 1x.<size> where the value 1x is number of instances and <size> specifies performance capabilities.

Important

It is not possible to change the number 1x for the deployment size.

Table 12.1. Loki sizing
	1x.demo	1x.extra-small	1x.small	1x.medium
Data transfer	Demo use only	100GB/day	500GB/day	2TB/day
Queries per second (QPS)	Demo use only	1-25 QPS at 200ms	25-50 QPS at 200ms	25-75 QPS at 200ms
Replication factor	None	2	2	2
Total CPU requests	None	14 vCPUs	34 vCPUs	54 vCPUs
Total CPU requests if using the ruler	None	16 vCPUs	42 vCPUs	70 vCPUs
Total memory requests	None	31Gi	67Gi	139Gi
Total memory requests if using the ruler	None	35Gi	83Gi	171Gi
Total disk requests	40Gi	430Gi	430Gi	590Gi
Total disk requests if using the ruler	80Gi	750Gi	750Gi	910Gi

12.2.1.2. Installing Logging and the Loki Operator using the web console

Prerequisites

You have access to a supported object store (AWS S3, Google Cloud Storage, Azure, Swift, Minio, OpenShift Data Foundation).
You have administrator permissions.
You have access to the OpenShift Container Platform web console.

Procedure

In the OpenShift Container Platform web console Administrator perspective, go to Operators → OperatorHub.
Type Loki Operator in the Filter by keyword field. Click Loki Operator in the list of available Operators, and then click Install.
Important
The Community Loki Operator is not supported by Red Hat.
Select stable or stable-x.y as the Update channel.
Note
The stable channel only provides updates to the most recent release of logging. To continue receiving updates for prior releases, you must change your subscription channel to stable-x.y, where x.y represents the major and minor version of logging you have installed. For example, stable-5.7.
The Loki Operator must be deployed to the global operator group namespace openshift-operators-redhat, so the Installation mode and Installed Namespace are already selected. If this namespace does not already exist, it is created for you.
Select Enable Operator-recommended cluster monitoring on this namespace.
This option sets the openshift.io/cluster-monitoring: "true" label in the Namespace object. You must select this option to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
For Update approval select Automatic, then click Install.
If the approval strategy in the subscription is set to Automatic, the update process initiates as soon as a new Operator version is available in the selected channel. If the approval strategy is set to Manual, you must manually approve pending updates.
Install the Red Hat OpenShift Logging Operator:
1. In the OpenShift Container Platform web console, click Operators → OperatorHub.
2. Choose Red Hat OpenShift Logging from the list of available Operators, and click Install.
3. Ensure that the A specific namespace on the cluster is selected under Installation Mode.
4. Ensure that Operator recommended namespace is openshift-logging under Installed Namespace.
5. Select Enable Operator recommended cluster monitoring on this namespace.
  This option sets the openshift.io/cluster-monitoring: "true" label in the Namespace object. You must select this option to ensure that cluster monitoring scrapes the openshift-logging namespace.
6. Select stable-5.y as the Update Channel.
7. Select an Approval Strategy.
  - The Automatic strategy allows Operator Lifecycle Manager (OLM) to automatically update the Operator when a new version is available.
  - The Manual strategy requires a user with appropriate credentials to approve the Operator update.
8. Click Install.
Go to the Operators → Installed Operators page. Click the All instances tab.
From the Create new drop-down list, select LokiStack.
Select YAML view, and then use the following template to create a LokiStack CR:
Example LokiStack CR
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki 1
  namespace: openshift-logging 2
spec:
  size: 1x.small 3
  storage:
    schemas:
    - version: v13
      effectiveDate: "<yyyy>-<mm>-<dd>"
    secret:
      name: logging-loki-s3 4
      type: s3 5
      credentialMode: 6
  storageClassName: <storage_class_name> 7
  tenants:
    mode: openshift-logging 8
```
1
Use the name logging-loki.
2
You must specify the openshift-logging namespace.
3
Specify the deployment size. In the logging 5.8 and later versions, the supported size options for production instances of Loki are 1x.extra-small, 1x.small, or 1x.medium.
4
Specify the name of your log store secret.
5
Specify the corresponding storage type.
6
Optional field, logging 5.9 and later. Supported user configured values are as follows: static is the default authentication mode available for all supported object storage types using credentials stored in a Secret. token for short-lived tokens retrieved from a credential source. In this mode the static configuration does not contain credentials needed for the object storage. Instead, they are generated during runtime using a service, which allows for shorter-lived credentials and much more granular control. This authentication mode is not supported for all object storage types. token-cco is the default value when Loki is running on managed STS mode and using CCO on STS/WIF clusters.
7
Specify the name of a storage class for temporary storage. For best performance, specify a storage class that allocates block storage. Available storage classes for your cluster can be listed by using the oc get storageclasses command.
8
LokiStack defaults to running in multi-tenant mode, which cannot be modified. One tenant is provided for each log type: audit, infrastructure, and application logs. This enables access control for individual users and user groups to different log streams.
Important
It is not possible to change the number 1x for the deployment size.
Click Create.
Create an OpenShift Logging instance:
1. Switch to the Administration → Custom Resource Definitions page.
2. On the Custom Resource Definitions page, click ClusterLogging.
3. On the Custom Resource Definition details page, select View Instances from the Actions menu.
4. On the ClusterLoggings page, click Create ClusterLogging.
  You might have to refresh the page to load the data.
5. In the YAML field, replace the code with the following:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 1
  namespace: openshift-logging 2
spec:
  collection:
    type: vector
  logStore:
    lokistack:
      name: logging-loki
    type: lokistack
  visualization:
    type: ocp-console
    ocpConsole:
      logsLimit: 15
  managementState: Managed
```
  1
  Name must be instance.
  2
  Namespace must be openshift-logging.

Verification

Go to Operators → Installed Operators.
Make sure the openshift-logging project is selected.
In the Status column, verify that you see green checkmarks with InstallSucceeded and the text Up to date.

Note

An Operator might display a Failed status before the installation finishes. If the Operator install completes with an InstallSucceeded message, refresh the page.

12.2.1.3. Creating a secret for Loki object storage by using the web console

To configure Loki object storage, you must create a secret. You can create a secret by using the OpenShift Container Platform web console.

Prerequisites

You have administrator permissions.
You have access to the OpenShift Container Platform web console.
You installed the Loki Operator.

Procedure

Go to Workloads → Secrets in the Administrator perspective of the OpenShift Container Platform web console.
From the Create drop-down list, select From YAML.

Create a secret that uses the access_key_id and access_key_secret fields to specify your credentials and the bucketnames, endpoint, and region fields to define the object storage location. AWS is used in the following example:

Example Secret object

apiVersion: v1
kind: Secret
metadata:
  name: logging-loki-s3
  namespace: openshift-logging
stringData:
  access_key_id: AKIAIOSFODNN7EXAMPLE
  access_key_secret: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
  bucketnames: s3-bucket-name
  endpoint: https://s3.eu-central-1.amazonaws.com
  region: eu-central-1

Additional resources

Loki object storage

12.2.2. Deploying a Loki log store on a cluster that uses short-term credentials

For some storage providers, you can use the CCO utility (ccoctl) during installation to implement short-term credentials. These credentials are created and managed outside the OpenShift Container Platform cluster. Manual mode with short-term credentials for components.

Note

Short-term credential authentication must be configured during a new installation of Loki Operator, on a cluster that uses this credentials strategy. You cannot configure an existing cluster that uses a different credentials strategy to use this feature.

12.2.2.1. Workload identity federation

Workload identity federation enables authentication to cloud-based log stores using short-lived tokens.

Prerequisites

OpenShift Container Platform 4.14 and later
Logging 5.9 and later

Procedure

If you use the OpenShift Container Platform web console to install the Loki Operator, clusters that use short-lived tokens are automatically detected. You are prompted to create roles and supply the data required for the Loki Operator to create a CredentialsRequest object, which populates a secret.
If you use the OpenShift CLI (oc) to install the Loki Operator, you must manually create a subscription object using the appropriate template for your storage provider, as shown in the following examples. This authentication strategy is only supported for the storage providers indicated.

Azure sample subscription

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat
spec:
  channel: "stable-5.9"
  installPlanApproval: Manual
  name: loki-operator
  source: redhat-operators
  sourceNamespace: openshift-marketplace
  config:
    env:
      - name: CLIENTID
        value: <your_client_id>
      - name: TENANTID
        value: <your_tenant_id>
      - name: SUBSCRIPTIONID
        value: <your_subscription_id>
      - name: REGION
        value: <your_region>

AWS sample subscription

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat
spec:
  channel: "stable-5.9"
  installPlanApproval: Manual
  name: loki-operator
  source: redhat-operators
  sourceNamespace: openshift-marketplace
  config:
    env:
    - name: ROLEARN
      value: <role_ARN>

12.2.2.2. Creating a LokiStack custom resource by using the web console

You can create a LokiStack custom resource (CR) by using the OpenShift Container Platform web console.

Prerequisites

You have administrator permissions.
You have access to the OpenShift Container Platform web console.
You installed the Loki Operator.

Procedure

Go to the Operators → Installed Operators page. Click the All instances tab.
From the Create new drop-down list, select LokiStack.
Select YAML view, and then use the following template to create a LokiStack CR:
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki 1
  namespace: openshift-logging
spec:
  size: 1x.small 2
  storage:
    schemas:
      - effectiveDate: '2023-10-15'
        version: v13
    secret:
      name: logging-loki-s3 3
      type: s3 4
      credentialMode: 5
  storageClassName: <storage_class_name> 6
  tenants:
    mode: openshift-logging
```
1
Use the name logging-loki.
2
Specify the deployment size. In the logging 5.8 and later versions, the supported size options for production instances of Loki are 1x.extra-small, 1x.small, or 1x.medium.
3
Specify the secret used for your log storage.
4
Specify the corresponding storage type.
5
Optional field, logging 5.9 and later. Supported user configured values are as follows: static is the default authentication mode available for all supported object storage types using credentials stored in a Secret. token for short-lived tokens retrieved from a credential source. In this mode the static configuration does not contain credentials needed for the object storage. Instead, they are generated during runtime using a service, which allows for shorter-lived credentials and much more granular control. This authentication mode is not supported for all object storage types. token-cco is the default value when Loki is running on managed STS mode and using CCO on STS/WIF clusters.
6
Enter the name of a storage class for temporary storage. For best performance, specify a storage class that allocates block storage. Available storage classes for your cluster can be listed by using the oc get storageclasses command.

12.2.2.3. Installing Logging and the Loki Operator using the CLI

Prerequisites

You have administrator permissions.
You installed the OpenShift CLI (oc).
You have access to a supported object store. For example: AWS S3, Google Cloud Storage, Azure, Swift, Minio, or OpenShift Data Foundation.

Note

Create a Namespace object for Loki Operator:
Example Namespace object
```
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-operators-redhat 1
  annotations:
    openshift.io/node-selector: ""
  labels:
    openshift.io/cluster-monitoring: "true" 2
```
1
You must specify the openshift-operators-redhat namespace. To prevent possible conflicts with metrics, you should configure the Prometheus Cluster Monitoring stack to scrape metrics from the openshift-operators-redhat namespace and not the openshift-operators namespace. The openshift-operators namespace might contain community Operators, which are untrusted and could publish a metric with the same name as an OpenShift Container Platform metric, which would cause conflicts.
2
A string value that specifies the label as shown to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
Apply the Namespace object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Subscription object for Loki Operator:
Example Subscription object
```
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: loki-operator
  namespace: openshift-operators-redhat 1
spec:
  channel: stable 2
  name: loki-operator
  source: redhat-operators 3
  sourceNamespace: openshift-marketplace
```
1
You must specify the openshift-operators-redhat namespace.
2
Specify stable, or stable-5.<y> as the channel.
3
Specify redhat-operators. If your OpenShift Container Platform cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the CatalogSource object you created when you configured the Operator Lifecycle Manager (OLM).
Apply the Subscription object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a namespace object for the Red Hat OpenShift Logging Operator:
Example namespace object
```
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-logging 1
annotations:
    openshift.io/node-selector: ""
labels:
    openshift.io/cluster-logging: "true"
    openshift.io/cluster-monitoring: "true" 2
```
1
The Red Hat OpenShift Logging Operator is only deployable to the openshift-logging namespace.
2
A string value that specifies the label as shown to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
Apply the namespace object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Create an OperatorGroup object

Example OperatorGroup object

apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging 1
spec:
  targetNamespaces:
  - openshift-logging

1: You must specify the openshift-logging namespace.

Apply the OperatorGroup object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Subscription object:
```
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging 1
spec:
  channel: stable 2
  name: cluster-logging
  source: redhat-operators 3
  sourceNamespace: openshift-marketplace
```
1
You must specify the openshift-logging namespace.
2
Specify stable, or stable-5.<y> as the channel.
3
Specify redhat-operators. If your OpenShift Container Platform cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the CatalogSource object you created when you configured the Operator Lifecycle Manager (OLM).
Apply the Subscription object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a LokiStack CR:
Example LokiStack CR
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki 1
  namespace: openshift-logging 2
spec:
  size: 1x.small 3
  storage:
    schemas:
    - version: v13
      effectiveDate: "<yyyy>-<mm>-<dd>"
    secret:
      name: logging-loki-s3 4
      type: s3 5
      credentialMode: 6
  storageClassName: <storage_class_name> 7
  tenants:
    mode: openshift-logging 8
```
1
Use the name logging-loki.
2
You must specify the openshift-logging namespace.
3
Specify the deployment size. In the logging 5.8 and later versions, the supported size options for production instances of Loki are 1x.extra-small, 1x.small, or 1x.medium.
4
Specify the name of your log store secret.
5
Specify the corresponding storage type.
6
Optional field, logging 5.9 and later. Supported user configured values are as follows: static is the default authentication mode available for all supported object storage types using credentials stored in a Secret. token for short-lived tokens retrieved from a credential source. In this mode the static configuration does not contain credentials needed for the object storage. Instead, they are generated during runtime using a service, which allows for shorter-lived credentials and much more granular control. This authentication mode is not supported for all object storage types. token-cco is the default value when Loki is running on managed STS mode and using CCO on STS/WIF clusters.
7
Specify the name of a storage class for temporary storage. For best performance, specify a storage class that allocates block storage. Available storage classes for your cluster can be listed by using the oc get storageclasses command.
8
LokiStack defaults to running in multi-tenant mode, which cannot be modified. One tenant is provided for each log type: audit, infrastructure, and application logs. This enables access control for individual users and user groups to different log streams.
Apply the LokiStack CR object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Create a ClusterLogging CR object:

Example ClusterLogging CR object

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 1
  namespace: openshift-logging 2
spec:
  collection:
    type: vector
  logStore:
    lokistack:
      name: logging-loki
    type: lokistack
  visualization:
    type: ocp-console
    ocpConsole:
      logsLimit: 15
  managementState: Managed

1: Name must be instance.
2: Namespace must be openshift-logging.

Apply the ClusterLogging CR object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Verify the installation by running the following command:

$ oc get pods -n openshift-logging

Example output

$ oc get pods -n openshift-logging
NAME                                               READY   STATUS    RESTARTS   AGE
cluster-logging-operator-fb7f7cf69-8jsbq           1/1     Running   0          98m
collector-222js                                    2/2     Running   0          18m
collector-g9ddv                                    2/2     Running   0          18m
collector-hfqq8                                    2/2     Running   0          18m
collector-sphwg                                    2/2     Running   0          18m
collector-vv7zn                                    2/2     Running   0          18m
collector-wk5zz                                    2/2     Running   0          18m
logging-view-plugin-6f76fbb78f-n2n4n               1/1     Running   0          18m
lokistack-sample-compactor-0                       1/1     Running   0          42m
lokistack-sample-distributor-7d7688bcb9-dvcj8      1/1     Running   0          42m
lokistack-sample-gateway-5f6c75f879-bl7k9          2/2     Running   0          42m
lokistack-sample-gateway-5f6c75f879-xhq98          2/2     Running   0          42m
lokistack-sample-index-gateway-0                   1/1     Running   0          42m
lokistack-sample-ingester-0                        1/1     Running   0          42m
lokistack-sample-querier-6b7b56bccc-2v9q4          1/1     Running   0          42m
lokistack-sample-query-frontend-84fb57c578-gq2f7   1/1     Running   0          42m

12.2.2.4. Creating a secret for Loki object storage by using the CLI

To configure Loki object storage, you must create a secret. You can do this by using the OpenShift CLI (oc).

Prerequisites

You have administrator permissions.
You installed the Loki Operator.
You installed the OpenShift CLI (oc).

Procedure

Create a secret in the directory that contains your certificate and key files by running the following command:

$ oc create secret generic -n openshift-logging <your_secret_name> \
 --from-file=tls.key=<your_key_file>
 --from-file=tls.crt=<your_crt_file>
 --from-file=ca-bundle.crt=<your_bundle_file>
 --from-literal=username=<your_username>
 --from-literal=password=<your_password>

Note

Use generic or opaque secrets for best results.

Verification

Verify that a secret was created by running the following command:
```
$ oc get secrets
```

Additional resources

Loki object storage

12.2.2.5. Creating a LokiStack custom resource by using the CLI

You can create a LokiStack custom resource (CR) by using the OpenShift CLI (oc).

Prerequisites

You have administrator permissions.
You installed the Loki Operator.
You installed the OpenShift CLI (oc).

Procedure

Create a LokiStack CR:

Example LokiStack CR

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki 1
  namespace: openshift-logging
spec:
  size: 1x.small 2
  storage:
    schemas:
      - effectiveDate: '2023-10-15'
        version: v13
    secret:
      name: logging-loki-s3 3
      type: s3 4
      credentialMode: 5
  storageClassName: <storage_class_name> 6
  tenants:
    mode: openshift-logging

1

Use the name logging-loki.

2

Specify the deployment size. In the logging 5.8 and later versions, the supported size options for production instances of Loki are 1x.extra-small, 1x.small, or 1x.medium.

3

Specify the secret used for your log storage.

4

Specify the corresponding storage type.

5

Optional field, logging 5.9 and later. Supported user configured values are as follows: static is the default authentication mode available for all supported object storage types using credentials stored in a Secret. token for short-lived tokens retrieved from a credential source. In this mode the static configuration does not contain credentials needed for the object storage. Instead, they are generated during runtime using a service, which allows for shorter-lived credentials and much more granular control. This authentication mode is not supported for all object storage types. token-cco is the default value when Loki is running on managed STS mode and using CCO on STS/WIF clusters.

6

Enter the name of a storage class for temporary storage. For best performance, specify a storage class that allocates block storage. Available storage classes for your cluster can be listed by using the oc get storageclasses command.

Apply the LokiStack CR by running the following command:

Verification

Verify the installation by listing the pods in the openshift-logging project by running the following command and observing the output:

$ oc get pods -n openshift-logging

Confirm that you see several pods for components of the logging, similar to the following list:

Example output

NAME                                           READY   STATUS    RESTARTS   AGE
cluster-logging-operator-78fddc697-mnl82       1/1     Running   0          14m
collector-6cglq                                2/2     Running   0          45s
collector-8r664                                2/2     Running   0          45s
collector-8z7px                                2/2     Running   0          45s
collector-pdxl9                                2/2     Running   0          45s
collector-tc9dx                                2/2     Running   0          45s
collector-xkd76                                2/2     Running   0          45s
logging-loki-compactor-0                       1/1     Running   0          8m2s
logging-loki-distributor-b85b7d9fd-25j9g       1/1     Running   0          8m2s
logging-loki-distributor-b85b7d9fd-xwjs6       1/1     Running   0          8m2s
logging-loki-gateway-7bb86fd855-hjhl4          2/2     Running   0          8m2s
logging-loki-gateway-7bb86fd855-qjtlb          2/2     Running   0          8m2s
logging-loki-index-gateway-0                   1/1     Running   0          8m2s
logging-loki-index-gateway-1                   1/1     Running   0          7m29s
logging-loki-ingester-0                        1/1     Running   0          8m2s
logging-loki-ingester-1                        1/1     Running   0          6m46s
logging-loki-querier-f5cf9cb87-9fdjd           1/1     Running   0          8m2s
logging-loki-querier-f5cf9cb87-fp9v5           1/1     Running   0          8m2s
logging-loki-query-frontend-58c579fcb7-lfvbc   1/1     Running   0          8m2s
logging-loki-query-frontend-58c579fcb7-tjf9k   1/1     Running   0          8m2s
logging-view-plugin-79448d8df6-ckgmx           1/1     Running   0          46s

12.2.3. Loki object storage

The Loki Operator supports AWS S3, as well as other S3 compatible object stores such as Minio and OpenShift Data Foundation. Azure, GCS, and Swift are also supported.

The recommended nomenclature for Loki storage is logging-loki-<your_storage_provider>.

The following table shows the type values within the LokiStack custom resource (CR) for each storage provider. For more information, see the section on your storage provider.

Table 12.2. Secret type quick reference
Storage provider	Secret `type` value
AWS	s3
Azure	azure
Google Cloud	gcs
Minio	s3
OpenShift Data Foundation	s3
Swift	swift

12.2.3.1. AWS storage

Prerequisites

You installed the Loki Operator.
You installed the OpenShift CLI (oc).
You created a bucket on AWS.
You created an AWS IAM Policy and IAM User.

Procedure

Create an object storage secret with the name logging-loki-aws by running the following command:

$ oc create secret generic logging-loki-aws \
  --from-literal=bucketnames="<bucket_name>" \
  --from-literal=endpoint="<aws_bucket_endpoint>" \
  --from-literal=access_key_id="<aws_access_key_id>" \
  --from-literal=access_key_secret="<aws_access_key_secret>" \
  --from-literal=region="<aws_region_of_your_bucket>"

12.2.3.1.1. AWS storage for STS enabled clusters

If your cluster has STS enabled, the Cloud Credential Operator (CCO) supports short-term authentication using AWS tokens.

You can create the Loki object storage secret manually by running the following command:

$ oc -n openshift-logging create secret generic "logging-loki-aws" \
--from-literal=bucketnames="<s3_bucket_name>" \
--from-literal=region="<bucket_region>" \
--from-literal=audience="<oidc_audience>" 1

1: Optional annotation, default value is openshift.

12.2.3.2. Azure storage

Prerequisites

You installed the Loki Operator.
You installed the OpenShift CLI (oc).
You created a bucket on Azure.

Procedure

Create an object storage secret with the name logging-loki-azure by running the following command:

$ oc create secret generic logging-loki-azure \
  --from-literal=container="<azure_container_name>" \
  --from-literal=environment="<azure_environment>" \ 1
  --from-literal=account_name="<azure_account_name>" \
  --from-literal=account_key="<azure_account_key>"

1: Supported environment values are AzureGlobal, AzureChinaCloud, AzureGermanCloud, or AzureUSGovernment.

12.2.3.2.1. Azure storage for Microsoft Entra Workload ID enabled clusters

If your cluster has Microsoft Entra Workload ID enabled, the Cloud Credential Operator (CCO) supports short-term authentication using Workload ID.

You can create the Loki object storage secret manually by running the following command:

$ oc -n openshift-logging create secret generic logging-loki-azure \
--from-literal=environment="<azure_environment>" \
--from-literal=account_name="<storage_account_name>" \
--from-literal=container="<container_name>"

12.2.3.3. Google Cloud Platform storage

Prerequisites

You installed the Loki Operator.
You installed the OpenShift CLI (oc).
You created a project on Google Cloud Platform (GCP).
You created a bucket in the same project.
You created a service account in the same project for GCP authentication.

Procedure

Copy the service account credentials received from GCP into a file called key.json.

Create an object storage secret with the name logging-loki-gcs by running the following command:

$ oc create secret generic logging-loki-gcs \
  --from-literal=bucketname="<bucket_name>" \
  --from-file=key.json="<path/to/key.json>"

12.2.3.4. Minio storage

Prerequisites

You installed the Loki Operator.
You installed the OpenShift CLI (oc).
You have Minio deployed on your cluster.
You created a bucket on Minio.

Procedure

Create an object storage secret with the name logging-loki-minio by running the following command:

$ oc create secret generic logging-loki-minio \
  --from-literal=bucketnames="<bucket_name>" \
  --from-literal=endpoint="<minio_bucket_endpoint>" \
  --from-literal=access_key_id="<minio_access_key_id>" \
  --from-literal=access_key_secret="<minio_access_key_secret>"

12.2.3.5. OpenShift Data Foundation storage

Prerequisites

You installed the Loki Operator.
You installed the OpenShift CLI (oc).
You deployed OpenShift Data Foundation.
You configured your OpenShift Data Foundation cluster for object storage.

Procedure

Create an ObjectBucketClaim custom resource in the openshift-logging namespace:

apiVersion: objectbucket.io/v1alpha1
kind: ObjectBucketClaim
metadata:
  name: loki-bucket-odf
  namespace: openshift-logging
spec:
  generateBucketName: loki-bucket-odf
  storageClassName: openshift-storage.noobaa.io

Get bucket properties from the associated ConfigMap object by running the following command:

BUCKET_HOST=$(oc get -n openshift-logging configmap loki-bucket-odf -o jsonpath='{.data.BUCKET_HOST}')
BUCKET_NAME=$(oc get -n openshift-logging configmap loki-bucket-odf -o jsonpath='{.data.BUCKET_NAME}')
BUCKET_PORT=$(oc get -n openshift-logging configmap loki-bucket-odf -o jsonpath='{.data.BUCKET_PORT}')

Get bucket access key from the associated secret by running the following command:

ACCESS_KEY_ID=$(oc get -n openshift-logging secret loki-bucket-odf -o jsonpath='{.data.AWS_ACCESS_KEY_ID}' | base64 -d)
SECRET_ACCESS_KEY=$(oc get -n openshift-logging secret loki-bucket-odf -o jsonpath='{.data.AWS_SECRET_ACCESS_KEY}' | base64 -d)

Create an object storage secret with the name logging-loki-odf by running the following command:

$ oc create -n openshift-logging secret generic logging-loki-odf \
--from-literal=access_key_id="<access_key_id>" \
--from-literal=access_key_secret="<secret_access_key>" \
--from-literal=bucketnames="<bucket_name>" \
--from-literal=endpoint="https://<bucket_host>:<bucket_port>"

12.2.3.6. Swift storage

Prerequisites

You installed the Loki Operator.
You installed the OpenShift CLI (oc).
You created a bucket on Swift.

Procedure

Create an object storage secret with the name logging-loki-swift by running the following command:

$ oc create secret generic logging-loki-swift \
  --from-literal=auth_url="<swift_auth_url>" \
  --from-literal=username="<swift_usernameclaim>" \
  --from-literal=user_domain_name="<swift_user_domain_name>" \
  --from-literal=user_domain_id="<swift_user_domain_id>" \
  --from-literal=user_id="<swift_user_id>" \
  --from-literal=password="<swift_password>" \
  --from-literal=domain_id="<swift_domain_id>" \
  --from-literal=domain_name="<swift_domain_name>" \
  --from-literal=container_name="<swift_container_name>"

You can optionally provide project-specific data, region, or both by running the following command:

$ oc create secret generic logging-loki-swift \
  --from-literal=auth_url="<swift_auth_url>" \
  --from-literal=username="<swift_usernameclaim>" \
  --from-literal=user_domain_name="<swift_user_domain_name>" \
  --from-literal=user_domain_id="<swift_user_domain_id>" \
  --from-literal=user_id="<swift_user_id>" \
  --from-literal=password="<swift_password>" \
  --from-literal=domain_id="<swift_domain_id>" \
  --from-literal=domain_name="<swift_domain_name>" \
  --from-literal=container_name="<swift_container_name>" \
  --from-literal=project_id="<swift_project_id>" \
  --from-literal=project_name="<swift_project_name>" \
  --from-literal=project_domain_id="<swift_project_domain_id>" \
  --from-literal=project_domain_name="<swift_project_domain_name>" \
  --from-literal=region="<swift_region>"

12.2.4. Deploying an Elasticsearch log store

You can use the OpenShift Elasticsearch Operator to deploy an internal Elasticsearch log store on your OpenShift Container Platform cluster.

Note

12.2.4.1. Storage considerations for Elasticsearch

A persistent volume is required for each Elasticsearch deployment configuration. On OpenShift Container Platform this is achieved using persistent volume claims (PVCs).

Note

If you use a local volume for persistent storage, do not use a raw block volume, which is described with volumeMode: block in the LocalVolume object. Elasticsearch cannot use raw block volumes.

The OpenShift Elasticsearch Operator names the PVCs using the Elasticsearch resource name.

Fluentd ships any logs from systemd journal and /var/log/containers/*.log to Elasticsearch.

Elasticsearch requires sufficient memory to perform large merge operations. If it does not have enough memory, it becomes unresponsive. To avoid this problem, evaluate how much application log data you need, and allocate approximately double that amount of free storage capacity.

By default, when storage capacity is 85% full, Elasticsearch stops allocating new data to the node. At 90%, Elasticsearch attempts to relocate existing shards from that node to other nodes if possible. But if no nodes have a free capacity below 85%, Elasticsearch effectively rejects creating new indices and becomes RED.

Note

These low and high watermark values are Elasticsearch defaults in the current release. You can modify these default values. Although the alerts use the same default values, you cannot change these values in the alerts.

12.2.4.2. Installing the OpenShift Elasticsearch Operator by using the web console

The OpenShift Elasticsearch Operator creates and manages the Elasticsearch cluster used by OpenShift Logging.

Prerequisites

Elasticsearch is a memory-intensive application. Each Elasticsearch node needs at least 16GB of memory for both memory requests and limits, unless you specify otherwise in the ClusterLogging custom resource.
The initial set of OpenShift Container Platform nodes might not be large enough to support the Elasticsearch cluster. You must add additional nodes to the OpenShift Container Platform cluster to run with the recommended or higher memory, up to a maximum of 64GB for each Elasticsearch node.
Elasticsearch nodes can operate with a lower memory setting, though this is not recommended for production environments.
Ensure that you have the necessary persistent storage for Elasticsearch. Note that each Elasticsearch node requires its own storage volume.
Note
If you use a local volume for persistent storage, do not use a raw block volume, which is described with volumeMode: block in the LocalVolume object. Elasticsearch cannot use raw block volumes.

Procedure

In the OpenShift Container Platform web console, click Operators → OperatorHub.
Click OpenShift Elasticsearch Operator from the list of available Operators, and click Install.
Ensure that the All namespaces on the cluster is selected under Installation mode.
Ensure that openshift-operators-redhat is selected under Installed Namespace.
You must specify the openshift-operators-redhat namespace. The openshift-operators namespace might contain Community Operators, which are untrusted and could publish a metric with the same name as OpenShift Container Platform metric, which would cause conflicts.
Select Enable operator recommended cluster monitoring on this namespace.
This option sets the openshift.io/cluster-monitoring: "true" label in the Namespace object. You must select this option to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
Select stable-5.x as the Update channel.
Select an Update approval strategy:
- The Automatic strategy allows Operator Lifecycle Manager (OLM) to automatically update the Operator when a new version is available.
- The Manual strategy requires a user with appropriate credentials to approve the Operator update.
Click Install.

Verification

Verify that the OpenShift Elasticsearch Operator installed by switching to the Operators → Installed Operators page.
Ensure that OpenShift Elasticsearch Operator is listed in all projects with a Status of Succeeded.

12.2.4.3. Installing the OpenShift Elasticsearch Operator by using the CLI

You can use the OpenShift CLI (oc) to install the OpenShift Elasticsearch Operator.

Prerequisites

Ensure that you have the necessary persistent storage for Elasticsearch. Note that each Elasticsearch node requires its own storage volume.
Note
If you use a local volume for persistent storage, do not use a raw block volume, which is described with volumeMode: block in the LocalVolume object. Elasticsearch cannot use raw block volumes.
Elasticsearch is a memory-intensive application. By default, OpenShift Container Platform installs three Elasticsearch nodes with memory requests and limits of 16 GB. This initial set of three OpenShift Container Platform nodes might not have enough memory to run Elasticsearch within your cluster. If you experience memory issues that are related to Elasticsearch, add more Elasticsearch nodes to your cluster rather than increasing the memory on existing nodes.
You have administrator permissions.
You have installed the OpenShift CLI (oc).

Procedure

Create a Namespace object as a YAML file:
```
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-operators-redhat 1
  annotations:
    openshift.io/node-selector: ""
  labels:
    openshift.io/cluster-monitoring: "true" 2
```
1
You must specify the openshift-operators-redhat namespace. To prevent possible conflicts with metrics, configure the Prometheus Cluster Monitoring stack to scrape metrics from the openshift-operators-redhat namespace and not the openshift-operators namespace. The openshift-operators namespace might contain community Operators, which are untrusted and could publish a metric with the same name as metric, which would cause conflicts.
2
String. You must specify this label as shown to ensure that cluster monitoring scrapes the openshift-operators-redhat namespace.
Apply the Namespace object by running the following command:
```
$ oc apply -f <filename>.yaml
```

Create an OperatorGroup object as a YAML file:

apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: openshift-operators-redhat
  namespace: openshift-operators-redhat 1
spec: {}

1: You must specify the openshift-operators-redhat namespace.

Apply the OperatorGroup object by running the following command:
```
$ oc apply -f <filename>.yaml
```
Create a Subscription object to subscribe the namespace to the OpenShift Elasticsearch Operator:
Example Subscription
```
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: elasticsearch-operator
  namespace: openshift-operators-redhat 1
spec:
  channel: stable-x.y 2
  installPlanApproval: Automatic 3
  source: redhat-operators 4
  sourceNamespace: openshift-marketplace
  name: elasticsearch-operator
```
1
You must specify the openshift-operators-redhat namespace.
2
Specify stable, or stable-x.y as the channel. See the following note.
3
Automatic allows the Operator Lifecycle Manager (OLM) to automatically update the Operator when a new version is available. Manual requires a user with appropriate credentials to approve the Operator update.
4
Specify redhat-operators. If your OpenShift Container Platform cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the CatalogSource object created when you configured the Operator Lifecycle Manager (OLM).
Note
Specifying stable installs the current version of the latest stable release. Using stable with installPlanApproval: "Automatic" automatically upgrades your Operators to the latest stable major and minor release.
Specifying stable-x.y installs the current minor version of a specific major release. Using stable-x.y with installPlanApproval: "Automatic" automatically upgrades your Operators to the latest stable minor release within the major release.
Apply the subscription by running the following command:
```
$ oc apply -f <filename>.yaml
```
The OpenShift Elasticsearch Operator is installed to the openshift-operators-redhat namespace and copied to each project in the cluster.

Verification

Run the following command:
```
$ oc get csv -n --all-namespaces
```

Observe the output and confirm that pods for the OpenShift Elasticsearch Operator exist in each namespace

Example output

NAMESPACE                                          NAME                            DISPLAY                            VERSION          REPLACES                        PHASE
default                                            elasticsearch-operator.v5.8.1   OpenShift Elasticsearch Operator   5.8.1            elasticsearch-operator.v5.8.0   Succeeded
kube-node-lease                                    elasticsearch-operator.v5.8.1   OpenShift Elasticsearch Operator   5.8.1            elasticsearch-operator.v5.8.0   Succeeded
kube-public                                        elasticsearch-operator.v5.8.1   OpenShift Elasticsearch Operator   5.8.1            elasticsearch-operator.v5.8.0   Succeeded
kube-system                                        elasticsearch-operator.v5.8.1   OpenShift Elasticsearch Operator   5.8.1            elasticsearch-operator.v5.8.0   Succeeded
non-destructive-test                               elasticsearch-operator.v5.8.1   OpenShift Elasticsearch Operator   5.8.1            elasticsearch-operator.v5.8.0   Succeeded
openshift-apiserver-operator                       elasticsearch-operator.v5.8.1   OpenShift Elasticsearch Operator   5.8.1            elasticsearch-operator.v5.8.0   Succeeded
openshift-apiserver                                elasticsearch-operator.v5.8.1   OpenShift Elasticsearch Operator   5.8.1            elasticsearch-operator.v5.8.0   Succeeded
...

12.2.5. Configuring log storage

You can configure which log storage type your logging uses by modifying the ClusterLogging custom resource (CR).

Prerequisites

You have administrator permissions.
You have installed the OpenShift CLI (oc).
You have installed the Red Hat OpenShift Logging Operator and an internal log store that is either the LokiStack or Elasticsearch.
You have created a ClusterLogging CR.

Note

Procedure

Modify the ClusterLogging CR logStore spec:

ClusterLogging CR example

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
# ...
spec:
# ...
  logStore:
    type: <log_store_type> 1
    elasticsearch: 2
      nodeCount: <integer>
      resources: {}
      storage: {}
      redundancyPolicy: <redundancy_type> 3
    lokistack: 4
      name: {}
# ...

1: Specify the log store type. This can be either lokistack or elasticsearch.
2: Optional configuration options for the Elasticsearch log store.
3: Specify the redundancy type. This value can be ZeroRedundancy, SingleRedundancy, MultipleRedundancy, or FullRedundancy.
4: Optional configuration options for LokiStack.

Example ClusterLogging CR to specify LokiStack as the log store

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance
  namespace: openshift-logging
spec:
  managementState: Managed
  logStore:
    type: lokistack
    lokistack:
      name: logging-loki
# ...

Apply the ClusterLogging CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

12.3. Configuring the LokiStack log store

In logging documentation, LokiStack refers to the logging supported combination of Loki and web proxy with OpenShift Container Platform authentication integration. LokiStack’s proxy uses OpenShift Container Platform authentication to enforce multi-tenancy. Loki refers to the log store as either the individual component or an external store.

12.3.1. Creating a new group for the cluster-admin user role

Important

Querying application logs for multiple namespaces as a cluster-admin user, where the sum total of characters of all of the namespaces in the cluster is greater than 5120, results in the error Parse error: input size too long (XXXX > 5120). For better control over access to logs in LokiStack, make the cluster-admin user a member of the cluster-admin group. If the cluster-admin group does not exist, create it and add the desired users to it.

Use the following procedure to create a new group for users with cluster-admin permissions.

Procedure

Enter the following command to create a new group:
```
$ oc adm groups new cluster-admin
```
Enter the following command to add the desired user to the cluster-admin group:
```
$ oc adm groups add-users cluster-admin <username>
```
Enter the following command to add cluster-admin user role to the group:
```
$ oc adm policy add-cluster-role-to-group cluster-admin cluster-admin
```

12.3.2. LokiStack behavior during cluster restarts

In logging version 5.8 and newer versions, when an OpenShift Container Platform cluster is restarted, LokiStack ingestion and the query path continue to operate within the available CPU and memory resources available for the node. This means that there is no downtime for the LokiStack during OpenShift Container Platform cluster updates. This behavior is achieved by using PodDisruptionBudget resources. The Loki Operator provisions PodDisruptionBudget resources for Loki, which determine the minimum number of pods that must be available per component to ensure normal operations under certain conditions.

Additional resources

Pod disruption budgets Kubernetes documentation

12.3.3. Configuring Loki to tolerate node failure

In the logging 5.8 and later versions, the Loki Operator supports setting pod anti-affinity rules to request that pods of the same component are scheduled on different available nodes in the cluster.

Affinity is a property of pods that controls the nodes on which they prefer to be scheduled. Anti-affinity is a property of pods that prevents a pod from being scheduled on a node.

In OpenShift Container Platform, pod affinity and pod anti-affinity allow you to constrain which nodes your pod is eligible to be scheduled on based on the key-value labels on other pods.

You can override the preferred podAntiAffinity settings for Loki components by configuring required settings in the requiredDuringSchedulingIgnoredDuringExecution field:

Example user settings for the ingester component

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    ingester:
      podAntiAffinity:
      # ...
        requiredDuringSchedulingIgnoredDuringExecution: 1
        - labelSelector:
            matchLabels: 2
              app.kubernetes.io/component: ingester
          topologyKey: kubernetes.io/hostname
# ...

1: The stanza to define a required rule.
2: The key-value pair (label) that must be matched to apply the rule.

Additional resources

12.3.4. Zone aware data replication

In the logging 5.8 and later versions, the Loki Operator offers support for zone-aware data replication through pod topology spread constraints. Enabling this feature enhances reliability and safeguards against log loss in the event of a single zone failure. When configuring the deployment size as 1x.extra-small, 1x.small, or 1x.medium, the replication.factor field is automatically set to 2.

Example LokiStack CR with zone replication enabled

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
 name: logging-loki
 namespace: openshift-logging
spec:
 replicationFactor: 2 1
 replication:
   factor: 2 2
   zones:
   -  maxSkew: 1 3
      topologyKey: topology.kubernetes.io/zone 4

1: Deprecated field, values entered are overwritten by replication.factor.
2: This value is automatically set when deployment size is selected at setup.
3: The maximum difference in number of pods between any two topology domains. The default is 1, and you cannot specify a value of 0.
4: Defines zones in the form of a topology key that corresponds to a node label.

12.3.4.1. Recovering Loki pods from failed zones

Warning

Prerequisites

Logging version 5.8 or later.
Verify your LokiStack CR has a replication factor greater than 1.
Zone failure detected by the control plane, and nodes in the failed zone are marked by cloud provider integration.

Procedure

List the pods in Pending status by running the following command:

oc get pods --field-selector status.phase==Pending -n openshift-logging

Example oc get pods output

NAME                           READY   STATUS    RESTARTS   AGE 1
logging-loki-index-gateway-1   0/1     Pending   0          17m
logging-loki-ingester-1        0/1     Pending   0          16m
logging-loki-ruler-1           0/1     Pending   0          16m

1: These pods are in Pending status because their corresponding PVCs are in the failed zone.

List the PVCs in Pending status by running the following command:

oc get pvc -o=json -n openshift-logging | jq '.items[] | select(.status.phase == "Pending") | .metadata.name' -r

Example oc get pvc output

storage-logging-loki-index-gateway-1
storage-logging-loki-ingester-1
wal-logging-loki-ingester-1
storage-logging-loki-ruler-1
wal-logging-loki-ruler-1

Delete the PVC(s) for a pod by running the following command:
```
oc delete pvc __<pvc_name>__  -n openshift-logging
```
Then delete the pod(s) by running the following command:
```
oc delete pod __<pod_name>__  -n openshift-logging
```

Once these objects have been successfully deleted, they should automatically be rescheduled in an available zone.

12.3.4.1.1. Troubleshooting PVC in a terminating state

Remove the finalizer for each PVC by running the command below, then retry deletion.

oc patch pvc __<pvc_name>__ -p '{"metadata":{"finalizers":null}}' -n openshift-logging

Additional resources

12.3.5. Fine grained access for Loki logs

In logging 5.8 and later, the Red Hat OpenShift Logging Operator does not grant all users access to logs by default. As an administrator, you must configure your users' access unless the Operator was upgraded and prior configurations are in place. Depending on your configuration and need, you can configure fine grain access to logs using the following:

Cluster wide policies
Namespace scoped policies
Creation of custom admin groups

As an administrator, you need to create the role bindings and cluster role bindings appropriate for your deployment. The Red Hat OpenShift Logging Operator provides the following cluster roles:

cluster-logging-application-view grants permission to read application logs.
cluster-logging-infrastructure-view grants permission to read infrastructure logs.
cluster-logging-audit-view grants permission to read audit logs.

If you have upgraded from a prior version, an additional cluster role logging-application-logs-reader and associated cluster role binding logging-all-authenticated-application-logs-reader provide backward compatibility, allowing any authenticated user read access in their namespaces.

Note

Users with access by namespace must provide a namespace when querying application logs.

12.3.5.1. Cluster wide access

Cluster role binding resources reference cluster roles, and set permissions cluster wide.

Example ClusterRoleBinding

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: logging-all-application-logs-reader
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-logging-application-view 1
subjects: 2
- kind: Group
  name: system:authenticated
  apiGroup: rbac.authorization.k8s.io

1: Additional ClusterRoles are cluster-logging-infrastructure-view, and cluster-logging-audit-view.
2: Specifies the users or groups this object applies to.

12.3.5.2. Namespaced access

RoleBinding resources can be used with ClusterRole objects to define the namespace a user or group has access to logs for.

Example RoleBinding

kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: allow-read-logs
  namespace: log-test-0 1
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-logging-application-view
subjects:
- kind: User
  apiGroup: rbac.authorization.k8s.io
  name: testuser-0

1: Specifies the namespace this RoleBinding applies to.

12.3.5.3. Custom admin group access

If you have a large deployment with several users who require broader permissions, you can create a custom group using the adminGroup field. Users who are members of any group specified in the adminGroups field of the LokiStack CR are considered administrators.

Administrator users have access to all application logs in all namespaces, if they also get assigned the cluster-logging-application-view role.

Example LokiStack CR

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  tenants:
    mode: openshift-logging 1
    openshift:
      adminGroups: 2
      - cluster-admin
      - custom-admin-group 3

1: Custom admin groups are only available in this mode.
2: Entering an empty list [] value for this field disables admin groups.
3: Overrides the default groups (system:cluster-admins, cluster-admin, dedicated-admin)

Additional resources

Using RBAC to define and apply permissions

12.3.6. Enabling stream-based retention with Loki

With Logging version 5.6 and higher, you can configure retention policies based on log streams. Rules for these may be set globally, per tenant, or both. If you configure both, tenant rules apply before global rules.

Important

Note

Although logging version 5.9 and higher supports schema v12, v13 is recommended.

To enable stream-based retention, create a LokiStack CR:

Example global stream-based retention for AWS

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
   global: 1
      retention: 2
        days: 20
        streams:
        - days: 4
          priority: 1
          selector: '{kubernetes_namespace_name=~"test.+"}' 3
        - days: 1
          priority: 1
          selector: '{log_type="infrastructure"}'
  managementState: Managed
  replicationFactor: 1
  size: 1x.small
  storage:
    schemas:
    - effectiveDate: "2020-10-11"
      version: v11
    secret:
      name: logging-loki-s3
      type: aws
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

1: Sets retention policy for all log streams. Note: This field does not impact the retention period for stored logs in object storage.
2: Retention is enabled in the cluster when this block is added to the CR.
3: Contains the LogQL query used to define the log stream.spec: limits:

Example per-tenant stream-based retention for AWS

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
    global:
      retention:
        days: 20
    tenants: 1
      application:
        retention:
          days: 1
          streams:
            - days: 4
              selector: '{kubernetes_namespace_name=~"test.+"}' 2
      infrastructure:
        retention:
          days: 5
          streams:
            - days: 1
              selector: '{kubernetes_namespace_name=~"openshift-cluster.+"}'
  managementState: Managed
  replicationFactor: 1
  size: 1x.small
  storage:
    schemas:
    - effectiveDate: "2020-10-11"
      version: v11
    secret:
      name: logging-loki-s3
      type: aws
  storageClassName: gp3-csi
  tenants:
    mode: openshift-logging

1: Sets retention policy by tenant. Valid tenant types are application, audit, and infrastructure.
2: Contains the LogQL query used to define the log stream.

2 Apply the LokiStack CR:

$ oc apply -f <filename>.yaml

12.3.7. Troubleshooting Loki rate limit errors

If the Log Forwarder API forwards a large block of messages that exceeds the rate limit to Loki, Loki generates rate limit (429) errors.

In cases where the rate limit errors continue to occur, you can fix the issue by modifying the LokiStack custom resource (CR).

Important

The LokiStack CR is not available on Grafana-hosted Loki. This topic does not apply to Grafana-hosted Loki servers.

Conditions

The Log Forwarder API is configured to forward logs to Loki.

Your system sends a block of messages that is larger than 2 MB to Loki. For example:

"values":[["1630410392689800468","{\"kind\":\"Event\",\"apiVersion\":\
.......
......
......
......
\"received_at\":\"2021-08-31T11:46:32.800278+00:00\",\"version\":\"1.7.4 1.6.0\"}},\"@timestamp\":\"2021-08-31T11:46:32.799692+00:00\",\"viaq_index_name\":\"audit-write\",\"viaq_msg_id\":\"MzFjYjJkZjItNjY0MC00YWU4LWIwMTEtNGNmM2E5ZmViMGU4\",\"log_type\":\"audit\"}"]]}]}

After you enter oc logs -n openshift-logging -l component=collector, the collector logs in your cluster show a line containing one of the following error messages:

429 Too Many Requests Ingestion rate limit exceeded

Example Vector error message

2023-08-25T16:08:49.301780Z  WARN sink{component_kind="sink" component_id=default_loki_infra component_type=loki component_name=default_loki_infra}: vector::sinks::util::retries: Retrying after error. error=Server responded with an error: 429 Too Many Requests internal_log_rate_limit=true

Example Fluentd error message

2023-08-30 14:52:15 +0000 [warn]: [default_loki_infra] failed to flush the buffer. retry_times=2 next_retry_time=2023-08-30 14:52:19 +0000 chunk="604251225bf5378ed1567231a1c03b8b" error_class=Fluent::Plugin::LokiOutput::LogPostError error="429 Too Many Requests Ingestion rate limit exceeded for user infrastructure (limit: 4194304 bytes/sec) while attempting to ingest '4082' lines totaling '7820025' bytes, reduce log volume or contact your Loki administrator to see if the limit can be increased\n"

The error is also visible on the receiving end. For example, in the LokiStack ingester pod:

Example Loki ingester error message

level=warn ts=2023-08-30T14:57:34.155592243Z caller=grpc_logging.go:43 duration=1.434942ms method=/logproto.Pusher/Push err="rpc error: code = Code(429) desc = entry with timestamp 2023-08-30 14:57:32.012778399 +0000 UTC ignored, reason: 'Per stream rate limit exceeded (limit: 3MB/sec) while attempting to ingest for stream

Procedure

Update the ingestionBurstSize and ingestionRate fields in the LokiStack CR:
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
  limits:
    global:
      ingestion:
        ingestionBurstSize: 16 1
        ingestionRate: 8 2
# ...
```
1
The ingestionBurstSize field defines the maximum local rate-limited sample size per distributor replica in MB. This value is a hard limit. Set this value to at least the maximum logs size expected in a single push request. Single requests that are larger than the ingestionBurstSize value are not permitted.
2
The ingestionRate field is a soft limit on the maximum amount of ingested samples per second in MB. Rate limit errors occur if the rate of logs exceeds the limit, but the collector retries sending the logs. As long as the total average is lower than the limit, the system recovers and errors are resolved without user intervention.

12.3.8. Configuring Loki to tolerate memberlist creation failure

In an OpenShift cluster, administrators generally use a non-private IP network range. As a result, the LokiStack memberlist configuration fails because, by default, it only uses private IP networks.

As an administrator, you can select the pod network for the memberlist configuration. You can modify the LokiStack CR to use the podIP in the hashRing spec. To configure the LokiStack CR, use the following command:

$ oc patch LokiStack logging-loki -n openshift-logging  --type=merge -p '{"spec": {"hashRing":{"memberlist":{"instanceAddrType":"podIP","type": "memberlist"}}}}'

Example LokiStack to include podIP

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  hashRing:
    type: memberlist
    memberlist:
      instanceAddrType: podIP
# ...

12.3.9. Additional resources

12.4. Configuring the Elasticsearch log store

You can use Elasticsearch 6 to store and organize log data.

You can make modifications to your log store, including:

Storage for your Elasticsearch cluster
Shard replication across data nodes in the cluster, from full replication to no replication
External access to Elasticsearch data

12.4.1. Configuring log storage

You can configure which log storage type your logging uses by modifying the ClusterLogging custom resource (CR).

Prerequisites

You have administrator permissions.
You have installed the OpenShift CLI (oc).
You have installed the Red Hat OpenShift Logging Operator and an internal log store that is either the LokiStack or Elasticsearch.
You have created a ClusterLogging CR.

Note

Procedure

Modify the ClusterLogging CR logStore spec:

ClusterLogging CR example

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
# ...
spec:
# ...
  logStore:
    type: <log_store_type> 1
    elasticsearch: 2
      nodeCount: <integer>
      resources: {}
      storage: {}
      redundancyPolicy: <redundancy_type> 3
    lokistack: 4
      name: {}
# ...

1: Specify the log store type. This can be either lokistack or elasticsearch.
2: Optional configuration options for the Elasticsearch log store.
3: Specify the redundancy type. This value can be ZeroRedundancy, SingleRedundancy, MultipleRedundancy, or FullRedundancy.
4: Optional configuration options for LokiStack.

Example ClusterLogging CR to specify LokiStack as the log store

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance
  namespace: openshift-logging
spec:
  managementState: Managed
  logStore:
    type: lokistack
    lokistack:
      name: logging-loki
# ...

Apply the ClusterLogging CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

12.4.2. Forwarding audit logs to the log store

In a logging deployment, container and infrastructure logs are forwarded to the internal log store defined in the ClusterLogging custom resource (CR) by default.

Procedure

To use the Log Forward API to forward audit logs to the internal Elasticsearch instance:

Create or edit a YAML file that defines the ClusterLogForwarder CR object:

Create a CR to send all log types to the internal Elasticsearch instance. You can use the following example without making any changes:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  pipelines: 1
  - name: all-to-default
    inputRefs:
    - infrastructure
    - application
    - audit
    outputRefs:
    - default
```
1
A pipeline defines the type of logs to forward using the specified output. The default output forwards logs to the internal Elasticsearch instance.
Note
You must specify all three types of logs in the pipeline: application, infrastructure, and audit. If you do not specify a log type, those logs are not stored and will be lost.

If you have an existing ClusterLogForwarder CR, add a pipeline to the default output for the audit logs. You do not need to define the default output. For example:

apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
   - name: elasticsearch-insecure
     type: "elasticsearch"
     url: http://elasticsearch-insecure.messaging.svc.cluster.local
     insecure: true
   - name: elasticsearch-secure
     type: "elasticsearch"
     url: https://elasticsearch-secure.messaging.svc.cluster.local
     secret:
       name: es-audit
   - name: secureforward-offcluster
     type: "fluentdForward"
     url: https://secureforward.offcluster.com:24224
     secret:
       name: secureforward
  pipelines:
   - name: container-logs
     inputRefs:
     - application
     outputRefs:
     - secureforward-offcluster
   - name: infra-logs
     inputRefs:
     - infrastructure
     outputRefs:
     - elasticsearch-insecure
   - name: audit-logs
     inputRefs:
     - audit
     outputRefs:
     - elasticsearch-secure
     - default 1

1: This pipeline sends the audit logs to the internal Elasticsearch instance in addition to an external instance.

Additional resources

About log collection and forwarding

12.4.3. Configuring log retention time

You can configure a retention policy that specifies how long the default Elasticsearch log store keeps indices for each of the three log sources: infrastructure logs, application logs, and audit logs.

To configure the retention policy, you set a maxAge parameter for each log source in the ClusterLogging custom resource (CR). The CR applies these values to the Elasticsearch rollover schedule, which determines when Elasticsearch deletes the rolled-over indices.

Elasticsearch rolls over an index, moving the current index and creating a new index, when an index matches any of the following conditions:

The index is older than the rollover.maxAge value in the Elasticsearch CR.
The index size is greater than 40 GB × the number of primary shards.
The index doc count is greater than 40960 KB × the number of primary shards.

Elasticsearch deletes the rolled-over indices based on the retention policy you configure. If you do not create a retention policy for any log sources, logs are deleted after seven days by default.

Prerequisites

The Red Hat OpenShift Logging Operator and the OpenShift Elasticsearch Operator must be installed.

Procedure

To configure the log retention time:

Edit the ClusterLogging CR to add or modify the retentionPolicy parameter:
```
apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
...
spec:
  managementState: "Managed"
  logStore:
    type: "elasticsearch"
    retentionPolicy: 1
      application:
        maxAge: 1d
      infra:
        maxAge: 7d
      audit:
        maxAge: 7d
    elasticsearch:
      nodeCount: 3
...
```
1
Specify the time that Elasticsearch should retain each log source. Enter an integer and a time designation: weeks(w), hours(h/H), minutes(m) and seconds(s). For example, 1d for one day. Logs older than the maxAge are deleted. By default, logs are retained for seven days.
You can verify the settings in the Elasticsearch custom resource (CR).
For example, the Red Hat OpenShift Logging Operator updated the following Elasticsearch CR to configure a retention policy that includes settings to roll over active indices for the infrastructure logs every eight hours and the rolled-over indices are deleted seven days after rollover. OpenShift Container Platform checks every 15 minutes to determine if the indices need to be rolled over.
```
apiVersion: "logging.openshift.io/v1"
kind: "Elasticsearch"
metadata:
  name: "elasticsearch"
spec:
...
  indexManagement:
    policies: 1
      - name: infra-policy
        phases:
          delete:
            minAge: 7d 2
          hot:
            actions:
              rollover:
                maxAge: 8h 3
        pollInterval: 15m 4
...
```
1
For each log source, the retention policy indicates when to delete and roll over logs for that source.
2
When OpenShift Container Platform deletes the rolled-over indices. This setting is the maxAge you set in the ClusterLogging CR.
3
The index age for OpenShift Container Platform to consider when rolling over the indices. This value is determined from the maxAge you set in the ClusterLogging CR.
4
When OpenShift Container Platform checks if the indices should be rolled over. This setting is the default and cannot be changed.
Note
Modifying the Elasticsearch CR is not supported. All changes to the retention policies must be made in the ClusterLogging CR.
The OpenShift Elasticsearch Operator deploys a cron job to roll over indices for each mapping using the defined policy, scheduled using the pollInterval.
```
$ oc get cronjob
```
Example output
```
NAME                     SCHEDULE       SUSPEND   ACTIVE   LAST SCHEDULE   AGE
elasticsearch-im-app     */15 * * * *   False     0        <none>          4s
elasticsearch-im-audit   */15 * * * *   False     0        <none>          4s
elasticsearch-im-infra   */15 * * * *   False     0        <none>          4s
```

12.4.4. Configuring CPU and memory requests for the log store

Each component specification allows for adjustments to both the CPU and memory requests. You should not have to manually adjust these values as the OpenShift Elasticsearch Operator sets values sufficient for your environment.

Note

In large-scale clusters, the default memory limit for the Elasticsearch proxy container might not be sufficient, causing the proxy container to be OOMKilled. If you experience this issue, increase the memory requests and limits for the Elasticsearch proxy.

Each Elasticsearch node can operate with a lower memory setting though this is not recommended for production deployments. For production use, you should have no less than the default 16Gi allocated to each pod. Preferably you should allocate as much as possible, up to 64Gi per pod.

Prerequisites

The Red Hat OpenShift Logging and Elasticsearch Operators must be installed.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:
```
$ oc edit ClusterLogging instance
```
```
apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"
....
spec:
    logStore:
      type: "elasticsearch"
      elasticsearch:1
        resources:
          limits: 2
            memory: "32Gi"
          requests: 3
            cpu: "1"
            memory: "16Gi"
        proxy: 4
          resources:
            limits:
              memory: 100Mi
            requests:
              memory: 100Mi
```
1
Specify the CPU and memory requests for Elasticsearch as needed. If you leave these values blank, the OpenShift Elasticsearch Operator sets default values that should be sufficient for most deployments. The default values are 16Gi for the memory request and 1 for the CPU request.
2
The maximum amount of resources a pod can use.
3
The minimum resources required to schedule a pod.
4
Specify the CPU and memory requests for the Elasticsearch proxy as needed. If you leave these values blank, the OpenShift Elasticsearch Operator sets default values that are sufficient for most deployments. The default values are 256Mi for the memory request and 100m for the CPU request.

When adjusting the amount of Elasticsearch memory, the same value should be used for both requests and limits.

For example:

      resources:
        limits: 1
          memory: "32Gi"
        requests: 2
          cpu: "8"
          memory: "32Gi"

1: The maximum amount of the resource.
2: The minimum amount required.

Kubernetes generally adheres the node configuration and does not allow Elasticsearch to use the specified limits. Setting the same value for the requests and limits ensures that Elasticsearch can use the memory you want, assuming the node has the memory available.

12.4.5. Configuring replication policy for the log store

You can define how Elasticsearch shards are replicated across data nodes in the cluster.

Prerequisites

The Red Hat OpenShift Logging and Elasticsearch Operators must be installed.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:
```
$ oc edit clusterlogging instance
```
```
apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"

....

spec:
  logStore:
    type: "elasticsearch"
    elasticsearch:
      redundancyPolicy: "SingleRedundancy" 1
```
1
Specify a redundancy policy for the shards. The change is applied upon saving the changes.
FullRedundancy. Elasticsearch fully replicates the primary shards for each index to every data node. This provides the highest safety, but at the cost of the highest amount of disk required and the poorest performance.
MultipleRedundancy. Elasticsearch fully replicates the primary shards for each index to half of the data nodes. This provides a good tradeoff between safety and performance.
SingleRedundancy. Elasticsearch makes one copy of the primary shards for each index. Logs are always available and recoverable as long as at least two data nodes exist. Better performance than MultipleRedundancy, when using 5 or more nodes. You cannot apply this policy on deployments of single Elasticsearch node.
ZeroRedundancy. Elasticsearch does not make copies of the primary shards. Logs might be unavailable or lost in the event a node is down or fails. Use this mode when you are more concerned with performance than safety, or have implemented your own disk/PVC backup/restore strategy.

Note

The number of primary shards for the index templates is equal to the number of Elasticsearch data nodes.

12.4.6. Scaling down Elasticsearch pods

Reducing the number of Elasticsearch pods in your cluster can result in data loss or Elasticsearch performance degradation.

If you scale down, you should scale down by one pod at a time and allow the cluster to re-balance the shards and replicas. After the Elasticsearch health status returns to green, you can scale down by another pod.

Note

If your Elasticsearch cluster is set to ZeroRedundancy, you should not scale down your Elasticsearch pods.

12.4.7. Configuring persistent storage for the log store

Elasticsearch requires persistent storage. The faster the storage, the faster the Elasticsearch performance.

Warning

Using NFS storage as a volume or a persistent volume (or via NAS such as Gluster) is not supported for Elasticsearch storage, as Lucene relies on file system behavior that NFS does not supply. Data corruption and other problems can occur.

Prerequisites

The Red Hat OpenShift Logging and Elasticsearch Operators must be installed.

Procedure

Edit the ClusterLogging CR to specify that each data node in the cluster is bound to a Persistent Volume Claim.

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"
# ...
spec:
  logStore:
    type: "elasticsearch"
    elasticsearch:
      nodeCount: 3
      storage:
        storageClassName: "gp2"
        size: "200G"

This example specifies each data node in the cluster is bound to a Persistent Volume Claim that requests "200G" of AWS General Purpose SSD (gp2) storage.

Note

If you use a local volume for persistent storage, do not use a raw block volume, which is described with volumeMode: block in the LocalVolume object. Elasticsearch cannot use raw block volumes.

12.4.8. Configuring the log store for emptyDir storage

You can use emptyDir with your log store, which creates an ephemeral deployment in which all of a pod’s data is lost upon restart.

Note

When using emptyDir, if log storage is restarted or redeployed, you will lose data.

Prerequisites

The Red Hat OpenShift Logging and Elasticsearch Operators must be installed.

Procedure

Edit the ClusterLogging CR to specify emptyDir:

 spec:
    logStore:
      type: "elasticsearch"
      elasticsearch:
        nodeCount: 3
        storage: {}

12.4.9. Performing an Elasticsearch rolling cluster restart

Perform a rolling restart when you change the elasticsearch config map or any of the elasticsearch-* deployment configurations.

Also, a rolling restart is recommended if the nodes on which an Elasticsearch pod runs requires a reboot.

Prerequisites

The Red Hat OpenShift Logging and Elasticsearch Operators must be installed.

Procedure

To perform a rolling cluster restart:

Change to the openshift-logging project:
```
$ oc project openshift-logging
```

Get the names of the Elasticsearch pods:

$ oc get pods -l component=elasticsearch

Scale down the collector pods so they stop sending new logs to Elasticsearch:

$ oc -n openshift-logging patch daemonset/collector -p '{"spec":{"template":{"spec":{"nodeSelector":{"logging-infra-collector": "false"}}}}}'

Perform a shard synced flush using the OpenShift Container Platform es_util tool to ensure there are no pending operations waiting to be written to disk prior to shutting down:

$ oc exec <any_es_pod_in_the_cluster> -c elasticsearch -- es_util --query="_flush/synced" -XPOST

For example:

$ oc exec -c elasticsearch-cdm-5ceex6ts-1-dcd6c4c7c-jpw6  -c elasticsearch -- es_util --query="_flush/synced" -XPOST

Example output

{"_shards":{"total":4,"successful":4,"failed":0},".security":{"total":2,"successful":2,"failed":0},".kibana_1":{"total":2,"successful":2,"failed":0}}

Prevent shard balancing when purposely bringing down nodes using the OpenShift Container Platform es_util tool:

$ oc exec <any_es_pod_in_the_cluster> -c elasticsearch -- es_util --query="_cluster/settings" -XPUT -d '{ "persistent": { "cluster.routing.allocation.enable" : "primaries" } }'

For example:

$ oc exec elasticsearch-cdm-5ceex6ts-1-dcd6c4c7c-jpw6 -c elasticsearch -- es_util --query="_cluster/settings" -XPUT -d '{ "persistent": { "cluster.routing.allocation.enable" : "primaries" } }'

Example output

{"acknowledged":true,"persistent":{"cluster":{"routing":{"allocation":{"enable":"primaries"}}}},"transient":

After the command is complete, for each deployment you have for an ES cluster:

By default, the OpenShift Container Platform Elasticsearch cluster blocks rollouts to their nodes. Use the following command to allow rollouts and allow the pod to pick up the changes:

$ oc rollout resume deployment/<deployment-name>

For example:

$ oc rollout resume deployment/elasticsearch-cdm-0-1

Example output

deployment.extensions/elasticsearch-cdm-0-1 resumed

A new pod is deployed. After the pod has a ready container, you can move on to the next deployment.

$ oc get pods -l component=elasticsearch-

Example output

NAME                                            READY   STATUS    RESTARTS   AGE
elasticsearch-cdm-5ceex6ts-1-dcd6c4c7c-jpw6k    2/2     Running   0          22h
elasticsearch-cdm-5ceex6ts-2-f799564cb-l9mj7    2/2     Running   0          22h
elasticsearch-cdm-5ceex6ts-3-585968dc68-k7kjr   2/2     Running   0          22h

After the deployments are complete, reset the pod to disallow rollouts:

$ oc rollout pause deployment/<deployment-name>

For example:

$ oc rollout pause deployment/elasticsearch-cdm-0-1

Example output

deployment.extensions/elasticsearch-cdm-0-1 paused

Check that the Elasticsearch cluster is in a green or yellow state:

$ oc exec <any_es_pod_in_the_cluster> -c elasticsearch -- es_util --query=_cluster/health?pretty=true

Note

If you performed a rollout on the Elasticsearch pod you used in the previous commands, the pod no longer exists and you need a new pod name here.

For example:

$ oc exec elasticsearch-cdm-5ceex6ts-1-dcd6c4c7c-jpw6 -c elasticsearch -- es_util --query=_cluster/health?pretty=true

{
  "cluster_name" : "elasticsearch",
  "status" : "yellow", 1
  "timed_out" : false,
  "number_of_nodes" : 3,
  "number_of_data_nodes" : 3,
  "active_primary_shards" : 8,
  "active_shards" : 16,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 1,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}

1: Make sure this parameter value is green or yellow before proceeding.

If you changed the Elasticsearch configuration map, repeat these steps for each Elasticsearch pod.

After all the deployments for the cluster have been rolled out, re-enable shard balancing:

$ oc exec <any_es_pod_in_the_cluster> -c elasticsearch -- es_util --query="_cluster/settings" -XPUT -d '{ "persistent": { "cluster.routing.allocation.enable" : "all" } }'

For example:

$ oc exec elasticsearch-cdm-5ceex6ts-1-dcd6c4c7c-jpw6 -c elasticsearch -- es_util --query="_cluster/settings" -XPUT -d '{ "persistent": { "cluster.routing.allocation.enable" : "all" } }'

Example output

{
  "acknowledged" : true,
  "persistent" : { },
  "transient" : {
    "cluster" : {
      "routing" : {
        "allocation" : {
          "enable" : "all"
        }
      }
    }
  }
}

Scale up the collector pods so they send new logs to Elasticsearch.

$ oc -n openshift-logging patch daemonset/collector -p '{"spec":{"template":{"spec":{"nodeSelector":{"logging-infra-collector": "true"}}}}}'

12.4.10. Exposing the log store service as a route

By default, the log store that is deployed with logging is not accessible from outside the logging cluster. You can enable a route with re-encryption termination for external access to the log store service for those tools that access its data.

Externally, you can access the log store by creating a reencrypt route, your OpenShift Container Platform token and the installed log store CA certificate. Then, access a node that hosts the log store service with a cURL request that contains:

The Authorization: Bearer ${token}
The Elasticsearch reencrypt route and an Elasticsearch API request.

Internally, you can access the log store service using the log store cluster IP, which you can get by using either of the following commands:

$ oc get service elasticsearch -o jsonpath={.spec.clusterIP} -n openshift-logging

Example output

172.30.183.229

$ oc get service elasticsearch -n openshift-logging

Example output

NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
elasticsearch   ClusterIP   172.30.183.229   <none>        9200/TCP   22h

You can check the cluster IP address with a command similar to the following:

$ oc exec elasticsearch-cdm-oplnhinv-1-5746475887-fj2f8 -n openshift-logging -- curl -tlsv1.2 --insecure -H "Authorization: Bearer ${token}" "https://172.30.183.229:9200/_cat/health"

Example output

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    29  100    29    0     0    108      0 --:--:-- --:--:-- --:--:--   108

Prerequisites

The Red Hat OpenShift Logging and Elasticsearch Operators must be installed.
You must have access to the project to be able to access to the logs.

Procedure

To expose the log store externally:

Change to the openshift-logging project:
```
$ oc project openshift-logging
```
Extract the CA certificate from the log store and write to the admin-ca file:
```
$ oc extract secret/elasticsearch --to=. --keys=admin-ca
```
Example output
```
admin-ca
```
Create the route for the log store service as a YAML file:
1. Create a YAML file with the following:
```
apiVersion: route.openshift.io/v1
kind: Route
metadata:
  name: elasticsearch
  namespace: openshift-logging
spec:
  host:
  to:
    kind: Service
    name: elasticsearch
  tls:
    termination: reencrypt
    destinationCACertificate: | 1
```
  1
  Add the log store CA certifcate or use the command in the next step. You do not have to set the spec.tls.key, spec.tls.certificate, and spec.tls.caCertificate parameters required by some reencrypt routes.
2. Run the following command to add the log store CA certificate to the route YAML you created in the previous step:
```
$ cat ./admin-ca | sed -e "s/^/      /" >> <file-name>.yaml
```
3. Create the route:
```
$ oc create -f <file-name>.yaml
```
  Example output
```
route.route.openshift.io/elasticsearch created
```

Check that the Elasticsearch service is exposed:

Get the token of this service account to be used in the request:
```
$ token=$(oc whoami -t)
```
Set the elasticsearch route you created as an environment variable.
```
$ routeES=`oc get route elasticsearch -o jsonpath={.spec.host}`
```

To verify the route was successfully created, run the following command that accesses Elasticsearch through the exposed route:

curl -tlsv1.2 --insecure -H "Authorization: Bearer ${token}" "https://${routeES}"

The response appears similar to the following:

Example output

{
  "name" : "elasticsearch-cdm-i40ktba0-1",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "0eY-tJzcR3KOdpgeMJo-MQ",
  "version" : {
  "number" : "6.8.1",
  "build_flavor" : "oss",
  "build_type" : "zip",
  "build_hash" : "Unknown",
  "build_date" : "Unknown",
  "build_snapshot" : true,
  "lucene_version" : "7.7.0",
  "minimum_wire_compatibility_version" : "5.6.0",
  "minimum_index_compatibility_version" : "5.0.0"
},
  "<tagline>" : "<for search>"
}

12.4.11. Removing unused components if you do not use the default Elasticsearch log store

As an administrator, in the rare case that you forward logs to a third-party log store and do not use the default Elasticsearch log store, you can remove several unused components from your logging cluster.

In other words, if you do not use the default Elasticsearch log store, you can remove the internal Elasticsearch logStore and Kibana visualization components from the ClusterLogging custom resource (CR). Removing these components is optional but saves resources.

Prerequisites

Verify that your log forwarder does not send log data to the default internal Elasticsearch cluster. Inspect the ClusterLogForwarder CR YAML file that you used to configure log forwarding. Verify that it does not have an outputRefs element that specifies default. For example:
```
outputRefs:
- default
```

Warning

Suppose the ClusterLogForwarder CR forwards log data to the internal Elasticsearch cluster, and you remove the logStore component from the ClusterLogging CR. In that case, the internal Elasticsearch cluster will not be present to store the log data. This absence can cause data loss.

Procedure

Edit the ClusterLogging custom resource (CR) in the openshift-logging project:
```
$ oc edit ClusterLogging instance
```
If they are present, remove the logStore and visualization stanzas from the ClusterLogging CR.

Preserve the collection stanza of the ClusterLogging CR. The result should look similar to the following example:

apiVersion: "logging.openshift.io/v1"
kind: "ClusterLogging"
metadata:
  name: "instance"
  namespace: "openshift-logging"
spec:
  managementState: "Managed"
  collection:
    type: "fluentd"
    fluentd: {}

Verify that the collector pods are redeployed:

$ oc get pods -l component=collector -n openshift-logging

Chapter 13. Logging alerts

13.1. Default logging alerts

Logging alerts are installed as part of the Red Hat OpenShift Logging Operator installation. Alerts depend on metrics exported by the log collection and log storage backends. These metrics are enabled if you selected the option to Enable Operator recommended cluster monitoring on this namespace when installing the Red Hat OpenShift Logging Operator.

Default logging alerts are sent to the OpenShift Container Platform monitoring stack Alertmanager in the openshift-monitoring namespace, unless you have disabled the local Alertmanager instance.

13.1.1. Accessing the Alerting UI in the Administrator and Developer perspectives

The Alerting UI is accessible through the Administrator perspective and the Developer perspective of the OpenShift Container Platform web console.

In the Administrator perspective, go to Observe → Alerting. The three main pages in the Alerting UI in this perspective are the Alerts, Silences, and Alerting rules pages.

In the Developer perspective, go to Observe → <project_name> → Alerts. In this perspective, alerts, silences, and alerting rules are all managed from the Alerts page. The results shown in the Alerts page are specific to the selected project.

Note

In the Developer perspective, you can select from core OpenShift Container Platform and user-defined projects that you have access to in the Project: <project_name> list. However, alerts, silences, and alerting rules relating to core OpenShift Container Platform projects are not displayed if you are not logged in as a cluster administrator.

13.1.2. Logging collector alerts

In logging 5.8 and later versions, the following alerts are generated by the Red Hat OpenShift Logging Operator. You can view these alerts in the OpenShift Container Platform web console.

Alert Name	Message	Description	Severity
CollectorNodeDown	Prometheus could not scrape `namespace`/`pod` collector component for more than 10m.	Collector cannot be scraped.	Critical
CollectorHighErrorRate	`value`% of records have resulted in an error by `namespace`/`pod` collector component.	`namespace`/`pod` collector component errors are high.	Critical
CollectorVeryHighErrorRate	`value`% of records have resulted in an error by `namespace`/`pod` collector component.	`namespace`/`pod` collector component errors are very high.	Critical

13.1.3. Vector collector alerts

In logging 5.7 and later versions, the following alerts are generated by the Vector collector. You can view these alerts in the OpenShift Container Platform web console.

Table 13.1. Vector collector alerts
Alert	Message	Description	Severity
`CollectorHighErrorRate`	`<value> of records have resulted in an error by vector <instance>.`	The number of vector output errors is high, by default more than 10 in the previous 15 minutes.	Warning
`CollectorNodeDown`	`Prometheus could not scrape vector <instance> for more than 10m.`	Vector is reporting that Prometheus could not scrape a specific Vector instance.	Critical
`CollectorVeryHighErrorRate`	`<value> of records have resulted in an error by vector <instance>.`	The number of Vector component errors are very high, by default more than 25 in the previous 15 minutes.	Critical
`FluentdQueueLengthIncreasing`	`In the last 1h, fluentd <instance> buffer queue length constantly increased more than 1. Current value is <value>.`	Fluentd is reporting that the queue size is increasing.	Warning

13.1.4. Fluentd collector alerts

The following alerts are generated by the legacy Fluentd log collector. You can view these alerts in the OpenShift Container Platform web console.

Table 13.2. Fluentd collector alerts
Alert	Message	Description	Severity
`FluentDHighErrorRate`	`<value> of records have resulted in an error by fluentd <instance>.`	The number of FluentD output errors is high, by default more than 10 in the previous 15 minutes.	Warning
`FluentdNodeDown`	`Prometheus could not scrape fluentd <instance> for more than 10m.`	Fluentd is reporting that Prometheus could not scrape a specific Fluentd instance.	Critical
`FluentdQueueLengthIncreasing`	`In the last 1h, fluentd <instance> buffer queue length constantly increased more than 1. Current value is <value>.`	Fluentd is reporting that the queue size is increasing.	Warning
`FluentDVeryHighErrorRate`	`<value> of records have resulted in an error by fluentd <instance>.`	The number of FluentD output errors is very high, by default more than 25 in the previous 15 minutes.	Critical

13.1.5. Elasticsearch alerting rules

You can view these alerting rules in the OpenShift Container Platform web console.

Table 13.3. Alerting rules
Alert	Description	Severity
`ElasticsearchClusterNotHealthy`	The cluster health status has been RED for at least 2 minutes. The cluster does not accept writes, shards may be missing, or the master node has not been elected yet.	Critical
`ElasticsearchClusterNotHealthy`	The cluster health status has been YELLOW for at least 20 minutes. Some shard replicas are not allocated.	Warning
`ElasticsearchDiskSpaceRunningLow`	The cluster is expected to be out of disk space within the next 6 hours.	Critical
`ElasticsearchHighFileDescriptorUsage`	The cluster is predicted to be out of file descriptors within the next hour.	Warning
`ElasticsearchJVMHeapUseHigh`	The JVM Heap usage on the specified node is high.	Alert
`ElasticsearchNodeDiskWatermarkReached`	The specified node has hit the low watermark due to low free disk space. Shards can not be allocated to this node anymore. You should consider adding more disk space to the node.	Info
`ElasticsearchNodeDiskWatermarkReached`	The specified node has hit the high watermark due to low free disk space. Some shards will be re-allocated to different nodes if possible. Make sure more disk space is added to the node or drop old indices allocated to this node.	Warning
`ElasticsearchNodeDiskWatermarkReached`	The specified node has hit the flood watermark due to low free disk space. Every index that has a shard allocated on this node is enforced a read-only block. The index block must be manually released when the disk use falls below the high watermark.	Critical
`ElasticsearchJVMHeapUseHigh`	The JVM Heap usage on the specified node is too high.	Alert
`ElasticsearchWriteRequestsRejectionJumps`	Elasticsearch is experiencing an increase in write rejections on the specified node. This node might not be keeping up with the indexing speed.	Warning
`AggregatedLoggingSystemCPUHigh`	The CPU used by the system on the specified node is too high.	Alert
`ElasticsearchProcessCPUHigh`	The CPU used by Elasticsearch on the specified node is too high.	Alert

13.1.6. Additional resources

Modifying core platform alerting rules

13.2. Custom logging alerts

In logging 5.7 and later versions, users can configure the LokiStack deployment to produce customized alerts and recorded metrics. If you want to use customized alerting and recording rules, you must enable the LokiStack ruler component.

LokiStack log-based alerts and recorded metrics are triggered by providing LogQL expressions to the ruler component. The Loki Operator manages a ruler that is optimized for the selected LokiStack size, which can be 1x.extra-small, 1x.small, or 1x.medium.

To provide these expressions, you must create an AlertingRule custom resource (CR) containing Prometheus-compatible alerting rules, or a RecordingRule CR containing Prometheus-compatible recording rules.

Administrators can configure log-based alerts or recorded metrics for application, audit, or infrastructure tenants. Users without administrator permissions can configure log-based alerts or recorded metrics for application tenants of the applications that they have access to.

Application, audit, and infrastructure alerts are sent by default to the OpenShift Container Platform monitoring stack Alertmanager in the openshift-monitoring namespace, unless you have disabled the local Alertmanager instance. If the Alertmanager that is used to monitor user-defined projects in the openshift-user-workload-monitoring namespace is enabled, application alerts are sent to the Alertmanager in this namespace by default.

13.2.1. Configuring the ruler

When the LokiStack ruler component is enabled, users can define a group of LogQL expressions that trigger logging alerts or recorded metrics.

Administrators can enable the ruler by modifying the LokiStack custom resource (CR).

Prerequisites

You have installed the Red Hat OpenShift Logging Operator and the Loki Operator.
You have created a LokiStack CR.
You have administrator permissions.

Procedure

Enable the ruler by ensuring that the LokiStack CR contains the following spec configuration:
```
apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: <name>
  namespace: <namespace>
spec:
# ...
  rules:
    enabled: true 1
    selector:
      matchLabels:
        openshift.io/<label_name>: "true" 2
    namespaceSelector:
      matchLabels:
        openshift.io/<label_name>: "true" 3
```
1
Enable Loki alerting and recording rules in your cluster.
2
Add a custom label that can be added to namespaces where you want to enable the use of logging alerts and metrics.
3
Add a custom label that can be added to namespaces where you want to enable the use of logging alerts and metrics.

13.2.2. Authorizing LokiStack rules RBAC permissions

In logging 5.8 and later, the following cluster roles for alerting and recording rules are available for LokiStack:

Rule name	Description
`alertingrules.loki.grafana.com-v1-admin`	Users with this role have administrative-level access to manage alerting rules. This cluster role grants permissions to create, read, update, delete, list, and watch `AlertingRule` resources within the `loki.grafana.com/v1` API group.
`alertingrules.loki.grafana.com-v1-crdview`	Users with this role can view the definitions of Custom Resource Definitions (CRDs) related to `AlertingRule` resources within the `loki.grafana.com/v1` API group, but do not have permissions for modifying or managing these resources.
`alertingrules.loki.grafana.com-v1-edit`	Users with this role have permission to create, update, and delete `AlertingRule` resources.
`alertingrules.loki.grafana.com-v1-view`	Users with this role can read `AlertingRule` resources within the `loki.grafana.com/v1` API group. They can inspect configurations, labels, and annotations for existing alerting rules but cannot make any modifications to them.
`recordingrules.loki.grafana.com-v1-admin`	Users with this role have administrative-level access to manage recording rules. This cluster role grants permissions to create, read, update, delete, list, and watch `RecordingRule` resources within the `loki.grafana.com/v1` API group.
`recordingrules.loki.grafana.com-v1-crdview`	Users with this role can view the definitions of Custom Resource Definitions (CRDs) related to `RecordingRule` resources within the `loki.grafana.com/v1` API group, but do not have permissions for modifying or managing these resources.
`recordingrules.loki.grafana.com-v1-edit`	Users with this role have permission to create, update, and delete `RecordingRule` resources.
`recordingrules.loki.grafana.com-v1-view`	Users with this role can read `RecordingRule` resources within the `loki.grafana.com/v1` API group. They can inspect configurations, labels, and annotations for existing alerting rules but cannot make any modifications to them.

13.2.2.1. Examples

To apply cluster roles for a user, you must bind an existing cluster role to a specific username.

The following example command gives the specified user create, read, update and delete (CRUD) permissions for alerting rules in a specific namespace in the cluster:

Example cluster role binding command for alerting rule CRUD permissions in a specific namespace

$ oc adm policy add-role-to-user alertingrules.loki.grafana.com-v1-admin -n <namespace> <username>

The following command gives the specified user administrator permissions for alerting rules in all namespaces:

Example cluster role binding command for administrator permissions

$ oc adm policy add-cluster-role-to-user alertingrules.loki.grafana.com-v1-admin <username>

Additional resources

Using RBAC to define and apply permissions

13.2.3. Creating a log-based alerting rule with Loki

If an AlertingRule CR includes an invalid interval period, it is an invalid alerting rule
If an AlertingRule CR includes an invalid for period, it is an invalid alerting rule.
If an AlertingRule CR includes an invalid LogQL expr, it is an invalid alerting rule.
If an AlertingRule CR includes two groups with the same name, it is an invalid alerting rule.
If none of above applies, an alerting rule is considered valid.

Tenant type	Valid namespaces for `AlertingRule` CRs
application
audit	`openshift-logging`
infrastructure	`openshift-/`, `kube-/\`, `default`

Prerequisites

Red Hat OpenShift Logging Operator 5.7 and later
OpenShift Container Platform 4.13 and later

Procedure

Create an AlertingRule custom resource (CR):

Example infrastructure AlertingRule CR

  apiVersion: loki.grafana.com/v1
  kind: AlertingRule
  metadata:
    name: loki-operator-alerts
    namespace: openshift-operators-redhat 1
    labels: 2
      openshift.io/<label_name>: "true"
  spec:
    tenantID: "infrastructure" 3
    groups:
      - name: LokiOperatorHighReconciliationError
        rules:
          - alert: HighPercentageError
            expr: | 4
              sum(rate({kubernetes_namespace_name="openshift-operators-redhat", kubernetes_pod_name=~"loki-operator-controller-manager.*"} |= "error" [1m])) by (job)
                /
              sum(rate({kubernetes_namespace_name="openshift-operators-redhat", kubernetes_pod_name=~"loki-operator-controller-manager.*"}[1m])) by (job)
                > 0.01
            for: 10s
            labels:
              severity: critical 5
            annotations:
              summary: High Loki Operator Reconciliation Errors 6
              description: High Loki Operator Reconciliation Errors 7

1: The namespace where this AlertingRule CR is created must have a label matching the LokiStack spec.rules.namespaceSelector definition.
2: The labels block must match the LokiStack spec.rules.selector definition.
3: AlertingRule CRs for infrastructure tenants are only supported in the openshift-*, kube-\*, or default namespaces.
4: The value for kubernetes_namespace_name: must match the value for metadata.namespace.
5: The value of this mandatory field must be critical, warning, or info.
6: This field is mandatory.
7: This field is mandatory.

Example application AlertingRule CR

  apiVersion: loki.grafana.com/v1
  kind: AlertingRule
  metadata:
    name: app-user-workload
    namespace: app-ns 1
    labels: 2
      openshift.io/<label_name>: "true"
  spec:
    tenantID: "application"
    groups:
      - name: AppUserWorkloadHighError
        rules:
          - alert:
            expr: | 3
            sum(rate({kubernetes_namespace_name="app-ns", kubernetes_pod_name=~"podName.*"} |= "error" [1m])) by (job)
            for: 10s
            labels:
              severity: critical 4
            annotations:
              summary:  5
              description:  6

1: The namespace where this AlertingRule CR is created must have a label matching the LokiStack spec.rules.namespaceSelector definition.
2: The labels block must match the LokiStack spec.rules.selector definition.
3: Value for kubernetes_namespace_name: must match the value for metadata.namespace.
4: The value of this mandatory field must be critical, warning, or info.
5: The value of this mandatory field is a summary of the rule.
6: The value of this mandatory field is a detailed description of the rule.

Apply the AlertingRule CR:
```
$ oc apply -f <filename>.yaml
```

13.2.4. Additional resources

Chapter 14. Performance and reliability tuning

14.1. Flow control mechanisms

If logs are produced faster than they can be collected, it can be difficult to predict or control the volume of logs being sent to an output. Not being able to predict or control the volume of logs being sent to an output can result in logs being lost. If there is a system outage and log buffers are accumulated without user control, this can also cause long recovery times and high latency when the connection is restored.

As an administrator, you can limit logging rates by configuring flow control mechanisms for your logging.

14.1.1. Benefits of flow control mechanisms

The cost and volume of logging can be predicted more accurately in advance.
Noisy containers cannot produce unbounded log traffic that drowns out other containers.
Ignoring low-value logs reduces the load on the logging infrastructure.
High-value logs can be preferred over low-value logs by assigning higher rate limits.

14.1.2. Configuring rate limits

Rate limits are configured per collector, which means that the maximum rate of log collection is the number of collector instances multiplied by the rate limit.

Because logs are collected from each node’s file system, a collector is deployed on each cluster node. For example, in a 3-node cluster, with a maximum rate limit of 10 records per second per collector, the maximum rate of log collection is 30 records per second.

Because the exact byte size of a record as written to an output can vary due to transformations, different encodings, or other factors, rate limits are set in number of records instead of bytes.

You can configure rate limits in the ClusterLogForwarder custom resource (CR) in two ways:

Output rate limit: Limit the rate of outbound logs to selected outputs, for example, to match the network or storage capacity of an output. The output rate limit controls the aggregated per-output rate.
Input rate limit: Limit the per-container rate of log collection for selected containers.

14.1.3. Configuring log forwarder output rate limits

You can limit the rate of outbound logs to a specified output by configuring the ClusterLogForwarder custom resource (CR).

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.

Procedure

Add a maxRecordsPerSecond limit value to the ClusterLogForwarder CR for a specified output.
The following example shows how to configure a per collector output rate limit for a Kafka broker output named kafka-example:
Example ClusterLogForwarder CR
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
# ...
  outputs:
    - name: kafka-example 1
      type: kafka 2
      limit:
        maxRecordsPerSecond: 1000000 3
# ...
```
1
The output name.
2
The type of output.
3
The log output rate limit. This value sets the maximum Quantity of logs that can be sent to the Kafka broker per second. This value is not set by default. The default behavior is best effort, and records are dropped if the log forwarder cannot keep up. If this value is 0, no logs are forwarded.
Apply the ClusterLogForwarder CR:
Example command
```
$ oc apply -f <filename>.yaml
```

Additional resources

Log output types

14.1.4. Configuring log forwarder input rate limits

You can limit the rate of incoming logs that are collected by configuring the ClusterLogForwarder custom resource (CR). You can set input limits on a per-container or per-namespace basis.

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.

Procedure

Add a maxRecordsPerSecond limit value to the ClusterLogForwarder CR for a specified input.
The following examples show how to configure input rate limits for different scenarios:
Example ClusterLogForwarder CR that sets a per-container limit for containers with certain labels
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
# ...
  inputs:
    - name: <input_name> 1
      application:
        selector:
          matchLabels: { example: label } 2
        containerLimit:
          maxRecordsPerSecond: 0 3
# ...
```
1
The input name.
2
A list of labels. If these labels match labels that are applied to a pod, the per-container limit specified in the maxRecordsPerSecond field is applied to those containers.
3
Configures the rate limit. Setting the maxRecordsPerSecond field to 0 means that no logs are collected for the container. Setting the maxRecordsPerSecond field to some other value means that a maximum of that number of records per second are collected for the container.
Example ClusterLogForwarder CR that sets a per-container limit for containers in selected namespaces
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
# ...
  inputs:
    - name: <input_name> 1
      application:
        namespaces: [ example-ns-1, example-ns-2 ] 2
        containerLimit:
          maxRecordsPerSecond: 10 3
    - name: <input_name>
      application:
        namespaces: [ test ]
        containerLimit:
          maxRecordsPerSecond: 1000
# ...
```
1
The input name.
2
A list of namespaces. The per-container limit specified in the maxRecordsPerSecond field is applied to all containers in the namespaces listed.
3
Configures the rate limit. Setting the maxRecordsPerSecond field to 10 means that a maximum of 10 records per second are collected for each container in the namespaces listed.
Apply the ClusterLogForwarder CR:
Example command
```
$ oc apply -f <filename>.yaml
```

14.2. Filtering logs by content

Collecting all logs from a cluster might produce a large amount of data, which can be expensive to transport and store.

You can reduce the volume of your log data by filtering out low priority data that does not need to be stored. Logging provides content filters that you can use to reduce the volume of log data.

Note

Content filters are distinct from input selectors. input selectors select or ignore entire log streams based on source metadata. Content filters edit log streams to remove and modify records based on the record content.

Log data volume can be reduced by using one of the following methods:

Configuring content filters to drop unwanted log records
Configuring content filters to prune log records

14.2.1. Configuring content filters to drop unwanted log records

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.
You have created a ClusterLogForwarder custom resource (CR).

Procedure

Add a configuration for a filter to the filters spec in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to drop log records based on regular expressions:
Example ClusterLogForwarder CR
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  filters:
  - name: <filter_name>
    type: drop 1
    drop: 2
    - test: 3
      - field: .kubernetes.labels."foo-bar/baz" 4
        matches: .+ 5
      - field: .kubernetes.pod_name
        notMatches: "my-pod" 6
  pipelines:
  - name: <pipeline_name> 7
    filterRefs: ["<filter_name>"]
# ...
```
1
Specifies the type of filter. The drop filter drops log records that match the filter configuration.
2
Specifies configuration options for applying the drop filter.
3
Specifies the configuration for tests that are used to evaluate whether a log record is dropped.
If all the conditions specified for a test are true, the test passes and the log record is dropped.
When multiple tests are specified for the drop filter configuration, if any of the tests pass, the record is dropped.
If there is an error evaluating a condition, for example, the field is missing from the log record being evaluated, that condition evaluates to false.
4
Specifies a dot-delimited field path, which is a path to a field in the log record. The path can contain alpha-numeric characters and underscores (a-zA-Z0-9_), for example, .kubernetes.namespace_name. If segments contain characters outside of this range, the segment must be in quotes, for example, .kubernetes.labels."foo.bar-bar/baz". You can include multiple field paths in a single test configuration, but they must all evaluate to true for the test to pass and the drop filter to be applied.
5
Specifies a regular expression. If log records match this regular expression, they are dropped. You can set either the matches or notMatches condition for a single field path, but not both.
6
Specifies a regular expression. If log records do not match this regular expression, they are dropped. You can set either the matches or notMatches condition for a single field path, but not both.
7
Specifies the pipeline that the drop filter is applied to.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

Additional examples

The following additional example shows how you can configure the drop filter to only keep higher priority log records:

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  filters:
  - name: important
    type: drop
    drop:
      test:
      - field: .message
        notMatches: "(?i)critical|error"
      - field: .level
        matches: "info|warning"
# ...

apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  filters:
  - name: important
    type: drop
    drop:
      test:
      - field: .kubernetes.namespace_name
        matches: "^open"
      test:
      - field: .log_type
        matches: "application"
      - field: .kubernetes.pod_name
        notMatches: "my-pod"
# ...

14.2.2. Configuring content filters to prune log records

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.
You have created a ClusterLogForwarder custom resource (CR).

Procedure

Add a configuration for a filter to the prune spec in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to prune log records based on field paths:
Important
If both are specified, records are pruned based on the notIn array first, which takes precedence over the in array. After records have been pruned by using the notIn array, they are then pruned by using the in array.
Example ClusterLogForwarder CR
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
# ...
spec:
  filters:
  - name: <filter_name>
    type: prune 1
    prune: 2
      in: [.kubernetes.annotations, .kubernetes.namespace_id] 3
      notIn: [.kubernetes,.log_type,.message,."@timestamp"] 4
  pipelines:
  - name: <pipeline_name> 5
    filterRefs: ["<filter_name>"]
# ...
```
1
Specify the type of filter. The prune filter prunes log records by configured fields.
2
Specify configuration options for applying the prune filter. The in and notIn fields are specified as arrays of dot-delimited field paths, which are paths to fields in log records. These paths can contain alpha-numeric characters and underscores (a-zA-Z0-9_), for example, .kubernetes.namespace_name. If segments contain characters outside of this range, the segment must be in quotes, for example, .kubernetes.labels."foo.bar-bar/baz".
3
Optional: Any fields that are specified in this array are removed from the log record.
4
Optional: Any fields that are not specified in this array are removed from the log record.
5
Specify the pipeline that the prune filter is applied to.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

14.2.3. Additional resources

About forwarding logs to third-party systems

14.3. Filtering logs by metadata

You can filter logs in the ClusterLogForwarder CR to select or ignore an entire log stream based on the metadata by using the input selector. As an administrator or developer, you can include or exclude the log collection to reduce the memory and CPU load on the collector.

Important

You can use this feature only if the Vector collector is set up in your logging deployment.

Note

input spec filtering is different from content filtering. input selectors select or ignore entire log streams based on the source metadata. Content filters edit the log streams to remove and modify the records based on the record content.

14.3.1. Filtering application logs at input by including or excluding the namespace or container name

You can include or exclude the application logs based on the namespace and container name by using the input selector.

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.
You have created a ClusterLogForwarder custom resource (CR).

Procedure

Add a configuration to include or exclude the namespace and container names in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to include or exclude namespaces and container names:
Example ClusterLogForwarder CR
```
apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
# ...
spec:
  inputs:
    - name: mylogs
      application:
        includes:
          - namespace: "my-project" 1
            container: "my-container" 2
        excludes:
          - container: "other-container*" 3
            namespace: "other-namespace" 4
# ...
```
1
Specifies that the logs are only collected from these namespaces.
2
Specifies that the logs are only collected from these containers.
3
Specifies the pattern of namespaces to ignore when collecting the logs.
4
Specifies the set of containers to ignore when collecting the logs.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

The excludes option takes precedence over includes.

14.3.2. Filtering application logs at input by including either the label expressions or matching label key and values

You can include the application logs based on the label expressions or a matching label key and its values by using the input selector.

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.
You have created a ClusterLogForwarder custom resource (CR).

Procedure

Add a configuration for a filter to the input spec in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to include logs based on label expressions or matched label key/values:
Example ClusterLogForwarder CR
```
apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
# ...
spec:
  inputs:
    - name: mylogs
      application:
        selector:
          matchExpressions:
          - key: env 1
            operator: In 2
            values: [“prod”, “qa”] 3
          - key: zone
            operator: NotIn
            values: [“east”, “west”]
          matchLabels: 4
            app: one
            name: app1
# ...
```
1
Specifies the label key to match.
2
Specifies the operator. Valid values include: In, NotIn, Exists, and DoesNotExist.
3
Specifies an array of string values. If the operator value is either Exists or DoesNotExist, the value array must be empty.
4
Specifies an exact key or value mapping.
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

14.3.3. Filtering the audit and infrastructure log inputs by source

You can define the list of audit and infrastructure sources to collect the logs by using the input selector.

Prerequisites

You have installed the Red Hat OpenShift Logging Operator.
You have administrator permissions.
You have created a ClusterLogForwarder custom resource (CR).

Procedure

Add a configuration to define the audit and infrastructure sources in the ClusterLogForwarder CR.
The following example shows how to configure the ClusterLogForwarder CR to define aduit and infrastructure sources:
Example ClusterLogForwarder CR
```
apiVersion: "logging.openshift.io/v1"
kind: ClusterLogForwarder
# ...
spec:
  inputs:
    - name: mylogs1
      infrastructure:
        sources: 1
          - node
    - name: mylogs2
      audit:
        sources: 2
          - kubeAPI
          - openshiftAPI
          - ovn
# ...
```
1
Specifies the list of infrastructure sources to collect. The valid sources include:
node: Journal log from the node
container: Logs from the workloads deployed in the namespaces
2
Specifies the list of audit sources to collect. The valid sources include:
kubeAPI: Logs from the Kubernetes API servers
openshiftAPI: Logs from the OpenShift API servers
auditd: Logs from a node auditd service
ovn: Logs from an open virtual network service
Apply the ClusterLogForwarder CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

Chapter 15. Scheduling resources

15.1. Using node selectors to move logging resources

A node selector specifies a map of key/value pairs that are defined using custom labels on nodes and selectors specified in pods.

For the pod to be eligible to run on a node, the pod must have the same key/value node selector as the label on the node.

15.1.1. About node selectors

You can use node selectors on pods and labels on nodes to control where the pod is scheduled. With node selectors, OpenShift Container Platform schedules the pods on nodes that contain matching labels.

You can use a node selector to place specific pods on specific nodes, cluster-wide node selectors to place new pods on specific nodes anywhere in the cluster, and project node selectors to place new pods in a project on specific nodes.

For example, as a cluster administrator, you can create an infrastructure where application developers can deploy pods only onto the nodes closest to their geographical location by including a node selector in every pod they create. In this example, the cluster consists of five data centers spread across two regions. In the U.S., label the nodes as us-east, us-central, or us-west. In the Asia-Pacific region (APAC), label the nodes as apac-east or apac-west. The developers can add a node selector to the pods they create to ensure the pods get scheduled on those nodes.

A pod is not scheduled if the Pod object contains a node selector, but no node has a matching label.

Important

If you are using node selectors and node affinity in the same pod configuration, the following rules control pod placement onto nodes:

If you configure both nodeSelector and nodeAffinity, both conditions must be satisfied for the pod to be scheduled onto a candidate node.
If you specify multiple nodeSelectorTerms associated with nodeAffinity types, then the pod can be scheduled onto a node if one of the nodeSelectorTerms is satisfied.
If you specify multiple matchExpressions associated with nodeSelectorTerms, then the pod can be scheduled onto a node only if all matchExpressions are satisfied.

Node selectors on specific pods and nodes

You can control which node a specific pod is scheduled on by using node selectors and labels.

To use node selectors and labels, first label the node to avoid pods being descheduled, then add the node selector to the pod.

Note

You cannot add a node selector directly to an existing scheduled pod. You must label the object that controls the pod, such as deployment config.

For example, the following Node object has the region: east label:

Sample Node object with a label

kind: Node
apiVersion: v1
metadata:
  name: ip-10-0-131-14.ec2.internal
  selfLink: /api/v1/nodes/ip-10-0-131-14.ec2.internal
  uid: 7bc2580a-8b8e-11e9-8e01-021ab4174c74
  resourceVersion: '478704'
  creationTimestamp: '2019-06-10T14:46:08Z'
  labels:
    kubernetes.io/os: linux
    topology.kubernetes.io/zone: us-east-1a
    node.openshift.io/os_version: '4.5'
    node-role.kubernetes.io/worker: ''
    topology.kubernetes.io/region: us-east-1
    node.openshift.io/os_id: rhcos
    node.kubernetes.io/instance-type: m4.large
    kubernetes.io/hostname: ip-10-0-131-14
    kubernetes.io/arch: amd64
    region: east 1
    type: user-node
#...

1: Labels to match the pod node selector.

A pod has the type: user-node,region: east node selector:

Sample Pod object with node selectors

apiVersion: v1
kind: Pod
metadata:
  name: s1
#...
spec:
  nodeSelector: 1
    region: east
    type: user-node
#...

1: Node selectors to match the node label. The node must have a label for each node selector.

When you create the pod using the example pod spec, it can be scheduled on the example node.

Default cluster-wide node selectors

With default cluster-wide node selectors, when you create a pod in that cluster, OpenShift Container Platform adds the default node selectors to the pod and schedules the pod on nodes with matching labels.

For example, the following Scheduler object has the default cluster-wide region=east and type=user-node node selectors:

Example Scheduler Operator Custom Resource

apiVersion: config.openshift.io/v1
kind: Scheduler
metadata:
  name: cluster
#...
spec:
  defaultNodeSelector: type=user-node,region=east
#...

A node in that cluster has the type=user-node,region=east labels:

Example Node object

apiVersion: v1
kind: Node
metadata:
  name: ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4
#...
  labels:
    region: east
    type: user-node
#...

Example Pod object with a node selector

apiVersion: v1
kind: Pod
metadata:
  name: s1
#...
spec:
  nodeSelector:
    region: east
#...

When you create the pod using the example pod spec in the example cluster, the pod is created with the cluster-wide node selector and is scheduled on the labeled node:

Example pod list with the pod on the labeled node

NAME     READY   STATUS    RESTARTS   AGE   IP           NODE                                       NOMINATED NODE   READINESS GATES
pod-s1   1/1     Running   0          20s   10.131.2.6   ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4   <none>           <none>

Note

If the project where you create the pod has a project node selector, that selector takes preference over a cluster-wide node selector. Your pod is not created or scheduled if the pod does not have the project node selector.

Project node selectors

With project node selectors, when you create a pod in this project, OpenShift Container Platform adds the node selectors to the pod and schedules the pods on a node with matching labels. If there is a cluster-wide default node selector, a project node selector takes preference.

For example, the following project has the region=east node selector:

Example Namespace object

apiVersion: v1
kind: Namespace
metadata:
  name: east-region
  annotations:
    openshift.io/node-selector: "region=east"
#...

The following node has the type=user-node,region=east labels:

Example Node object

apiVersion: v1
kind: Node
metadata:
  name: ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4
#...
  labels:
    region: east
    type: user-node
#...

When you create the pod using the example pod spec in this example project, the pod is created with the project node selectors and is scheduled on the labeled node:

Example Pod object

apiVersion: v1
kind: Pod
metadata:
  namespace: east-region
#...
spec:
  nodeSelector:
    region: east
    type: user-node
#...

Example pod list with the pod on the labeled node

NAME     READY   STATUS    RESTARTS   AGE   IP           NODE                                       NOMINATED NODE   READINESS GATES
pod-s1   1/1     Running   0          20s   10.131.2.6   ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4   <none>           <none>

A pod in the project is not created or scheduled if the pod contains different node selectors. For example, if you deploy the following pod into the example project, it is not be created:

Example Pod object with an invalid node selector

apiVersion: v1
kind: Pod
metadata:
  name: west-region
#...
spec:
  nodeSelector:
    region: west
#...

15.1.2. Loki pod placement

You can control which nodes the Loki pods run on, and prevent other workloads from using those nodes, by using tolerations or node selectors on the pods.

Example LokiStack with node selectors

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor: 1
      nodeSelector:
        node-role.kubernetes.io/infra: "" 2
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
# ...

1: Specifies the component pod type that applies to the node selector.
2: Specifies the pods that are moved to nodes containing the defined label.

In the previous example configuration, all Loki pods are moved to nodes containing the node-role.kubernetes.io/infra: "" label.

Example LokiStack CR with node selectors and tolerations

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
# ...

To configure the nodeSelector and tolerations fields of the LokiStack (CR), you can use the oc explain command to view the description and fields for a particular resource:

$ oc explain lokistack.spec.template

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: template <Object>

DESCRIPTION:
     Template defines the resource/limits/tolerations/nodeselectors per
     component

FIELDS:
   compactor	<Object>
     Compactor defines the compaction component spec.

   distributor	<Object>
     Distributor defines the distributor component spec.
...

For more detailed information, you can add a specific field:

$ oc explain lokistack.spec.template.compactor

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: compactor <Object>

DESCRIPTION:
     Compactor defines the compaction component spec.

FIELDS:
   nodeSelector	<map[string]string>
     NodeSelector defines the labels required by a node to schedule the
     component onto it.
...

15.1.3. Configuring resources and scheduling for logging collectors

Administrators can modify the resources or scheduling of the collector by creating a ClusterLogging custom resource (CR) that is in the same namespace and has the same name as the ClusterLogForwarder CR that it supports.

The applicable stanzas for the ClusterLogging CR when using multiple log forwarders in a deployment are managementState and collection. All other stanzas are ignored.

Prerequisites

You have administrator permissions.
You have installed the Red Hat OpenShift Logging Operator version 5.8 or newer.
You have created a ClusterLogForwarder CR.

Procedure

Create a ClusterLogging CR that supports your existing ClusterLogForwarder CR:

Example ClusterLogging CR YAML

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name:  <name> 1
  namespace: <namespace> 2
spec:
  managementState: "Managed"
  collection:
    type: "vector"
    tolerations:
    - key: "logging"
      operator: "Exists"
      effect: "NoExecute"
      tolerationSeconds: 6000
    resources:
      limits:
        memory: 1Gi
      requests:
        cpu: 100m
        memory: 1Gi
    nodeSelector:
      collector: needed
# ...

1: The name must be the same name as the ClusterLogForwarder CR.
2: The namespace must be the same namespace as the ClusterLogForwarder CR.

Apply the ClusterLogging CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

15.1.4. Viewing logging collector pods

You can view the logging collector pods and the corresponding nodes that they are running on.

Procedure

Run the following command in a project to view the logging collector pods and their details:

$ oc get pods --selector component=collector -o wide -n <project_name>

Example output

NAME           READY  STATUS    RESTARTS   AGE     IP            NODE                  NOMINATED NODE   READINESS GATES
collector-8d69v  1/1    Running   0          134m    10.130.2.30   master1.example.com   <none>           <none>
collector-bd225  1/1    Running   0          134m    10.131.1.11   master2.example.com   <none>           <none>
collector-cvrzs  1/1    Running   0          134m    10.130.0.21   master3.example.com   <none>           <none>
collector-gpqg2  1/1    Running   0          134m    10.128.2.27   worker1.example.com   <none>           <none>
collector-l9j7j  1/1    Running   0          134m    10.129.2.31   worker2.example.com   <none>           <none>

15.1.5. Additional resources

Placing pods on specific nodes using node selectors

15.2. Using taints and tolerations to control logging pod placement

Taints and tolerations allow the node to control which pods should (or should not) be scheduled on them.

15.2.1. Understanding taints and tolerations

A taint allows a node to refuse a pod to be scheduled unless that pod has a matching toleration.

You apply taints to a node through the Node specification (NodeSpec) and apply tolerations to a pod through the Pod specification (PodSpec). When you apply a taint a node, the scheduler cannot place a pod on that node unless the pod can tolerate the taint.

Example taint in a node specification

apiVersion: v1
kind: Node
metadata:
  name: my-node
#...
spec:
  taints:
  - effect: NoExecute
    key: key1
    value: value1
#...

Example toleration in a Pod spec

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
#...
spec:
  tolerations:
  - key: "key1"
    operator: "Equal"
    value: "value1"
    effect: "NoExecute"
    tolerationSeconds: 3600
#...

Taints and tolerations consist of a key, value, and effect.

Parameter Description

key

The key is any string, up to 253 characters. The key must begin with a letter or number, and may contain letters, numbers, hyphens, dots, and underscores.

value

The value is any string, up to 63 characters. The value must begin with a letter or number, and may contain letters, numbers, hyphens, dots, and underscores.

effect

The effect is one of the following:

`NoSchedule` ^[1]	New pods that do not match the taint are not scheduled onto that node. Existing pods on the node remain.
`PreferNoSchedule`	New pods that do not match the taint might be scheduled onto that node, but the scheduler tries not to. Existing pods on the node remain.
`NoExecute`	New pods that do not match the taint cannot be scheduled onto that node. Existing pods on the node that do not have a matching toleration are removed.

operator

`Equal`	The `key`/`value`/`effect` parameters must match. This is the default.
`Exists`	The `key`/`effect` parameters must match. You must leave a blank `value` parameter, which matches any.

If you add a NoSchedule taint to a control plane node, the node must have the node-role.kubernetes.io/master=:NoSchedule taint, which is added by default.

For example:

apiVersion: v1
kind: Node
metadata:
  annotations:
    machine.openshift.io/machine: openshift-machine-api/ci-ln-62s7gtb-f76d1-v8jxv-master-0
    machineconfiguration.openshift.io/currentConfig: rendered-master-cdc1ab7da414629332cc4c3926e6e59c
  name: my-node
#...
spec:
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
#...

A toleration matches a taint:

If the operator parameter is set to Equal:
- the key parameters are the same;
- the value parameters are the same;
- the effect parameters are the same.
If the operator parameter is set to Exists:
- the key parameters are the same;
- the effect parameters are the same.

The following taints are built into OpenShift Container Platform:

node.kubernetes.io/not-ready: The node is not ready. This corresponds to the node condition Ready=False.
node.kubernetes.io/unreachable: The node is unreachable from the node controller. This corresponds to the node condition Ready=Unknown.
node.kubernetes.io/memory-pressure: The node has memory pressure issues. This corresponds to the node condition MemoryPressure=True.
node.kubernetes.io/disk-pressure: The node has disk pressure issues. This corresponds to the node condition DiskPressure=True.
node.kubernetes.io/network-unavailable: The node network is unavailable.
node.kubernetes.io/unschedulable: The node is unschedulable.
node.cloudprovider.kubernetes.io/uninitialized: When the node controller is started with an external cloud provider, this taint is set on a node to mark it as unusable. After a controller from the cloud-controller-manager initializes this node, the kubelet removes this taint.
node.kubernetes.io/pid-pressure: The node has pid pressure. This corresponds to the node condition PIDPressure=True.
Important
OpenShift Container Platform does not set a default pid.available evictionHard.

15.2.2. Loki pod placement

You can control which nodes the Loki pods run on, and prevent other workloads from using those nodes, by using tolerations or node selectors on the pods.

Example LokiStack with node selectors

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor: 1
      nodeSelector:
        node-role.kubernetes.io/infra: "" 2
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
# ...

1: Specifies the component pod type that applies to the node selector.
2: Specifies the pods that are moved to nodes containing the defined label.

In the previous example configuration, all Loki pods are moved to nodes containing the node-role.kubernetes.io/infra: "" label.

Example LokiStack CR with node selectors and tolerations

apiVersion: loki.grafana.com/v1
kind: LokiStack
metadata:
  name: logging-loki
  namespace: openshift-logging
spec:
# ...
  template:
    compactor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    distributor:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    indexGateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ingester:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    querier:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    queryFrontend:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    ruler:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
    gateway:
      nodeSelector:
        node-role.kubernetes.io/infra: ""
      tolerations:
      - effect: NoSchedule
        key: node-role.kubernetes.io/infra
        value: reserved
      - effect: NoExecute
        key: node-role.kubernetes.io/infra
        value: reserved
# ...

To configure the nodeSelector and tolerations fields of the LokiStack (CR), you can use the oc explain command to view the description and fields for a particular resource:

$ oc explain lokistack.spec.template

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: template <Object>

DESCRIPTION:
     Template defines the resource/limits/tolerations/nodeselectors per
     component

FIELDS:
   compactor	<Object>
     Compactor defines the compaction component spec.

   distributor	<Object>
     Distributor defines the distributor component spec.
...

For more detailed information, you can add a specific field:

$ oc explain lokistack.spec.template.compactor

Example output

KIND:     LokiStack
VERSION:  loki.grafana.com/v1

RESOURCE: compactor <Object>

DESCRIPTION:
     Compactor defines the compaction component spec.

FIELDS:
   nodeSelector	<map[string]string>
     NodeSelector defines the labels required by a node to schedule the
     component onto it.
...

15.2.3. Using tolerations to control log collector pod placement

By default, log collector pods have the following tolerations configuration:

apiVersion: v1
kind: Pod
metadata:
  name: collector-example
  namespace: openshift-logging
spec:
# ...
  collection:
    type: vector
    tolerations:
    - effect: NoSchedule
      key: node-role.kubernetes.io/master
      operator: Exists
    - effect: NoSchedule
      key: node.kubernetes.io/disk-pressure
      operator: Exists
    - effect: NoExecute
      key: node.kubernetes.io/not-ready
      operator: Exists
    - effect: NoExecute
      key: node.kubernetes.io/unreachable
      operator: Exists
    - effect: NoSchedule
      key: node.kubernetes.io/memory-pressure
      operator: Exists
    - effect: NoSchedule
      key: node.kubernetes.io/pid-pressure
      operator: Exists
    - effect: NoSchedule
      key: node.kubernetes.io/unschedulable
      operator: Exists
# ...

Prerequisites

You have installed the Red Hat OpenShift Logging Operator and OpenShift CLI (oc).

Procedure

Add a taint to a node where you want logging collector pods to schedule logging collector pods by running the following command:
```
$ oc adm taint nodes <node_name> <key>=<value>:<effect>
```
Example command
```
$ oc adm taint nodes node1 collector=node:NoExecute
```
This example places a taint on node1 that has key collector, value node, and taint effect NoExecute. You must use the NoExecute taint effect. NoExecute schedules only pods that match the taint and removes existing pods that do not match.
Edit the collection stanza of the ClusterLogging custom resource (CR) to configure a toleration for the logging collector pods:
```
apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
# ...
spec:
# ...
  collection:
    type: vector
    tolerations:
    - key: collector 1
      operator: Exists 2
      effect: NoExecute 3
      tolerationSeconds: 6000 4
    resources:
      limits:
        memory: 2Gi
      requests:
        cpu: 100m
        memory: 1Gi
# ...
```
1
Specify the key that you added to the node.
2
Specify the Exists operator to require the key/value/effect parameters to match.
3
Specify the NoExecute effect.
4
Optionally, specify the tolerationSeconds parameter to set how long a pod can remain bound to a node before being evicted.

This toleration matches the taint created by the oc adm taint command. A pod with this toleration can be scheduled onto node1.

15.2.4. Configuring resources and scheduling for logging collectors

The applicable stanzas for the ClusterLogging CR when using multiple log forwarders in a deployment are managementState and collection. All other stanzas are ignored.

Prerequisites

You have administrator permissions.
You have installed the Red Hat OpenShift Logging Operator version 5.8 or newer.
You have created a ClusterLogForwarder CR.

Procedure

Create a ClusterLogging CR that supports your existing ClusterLogForwarder CR:

Example ClusterLogging CR YAML

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name:  <name> 1
  namespace: <namespace> 2
spec:
  managementState: "Managed"
  collection:
    type: "vector"
    tolerations:
    - key: "logging"
      operator: "Exists"
      effect: "NoExecute"
      tolerationSeconds: 6000
    resources:
      limits:
        memory: 1Gi
      requests:
        cpu: 100m
        memory: 1Gi
    nodeSelector:
      collector: needed
# ...

1: The name must be the same name as the ClusterLogForwarder CR.
2: The namespace must be the same namespace as the ClusterLogForwarder CR.

Apply the ClusterLogging CR by running the following command:
```
$ oc apply -f <filename>.yaml
```

15.2.5. Viewing logging collector pods

You can view the logging collector pods and the corresponding nodes that they are running on.

Procedure

Run the following command in a project to view the logging collector pods and their details:

$ oc get pods --selector component=collector -o wide -n <project_name>

Example output

NAME           READY  STATUS    RESTARTS   AGE     IP            NODE                  NOMINATED NODE   READINESS GATES
collector-8d69v  1/1    Running   0          134m    10.130.2.30   master1.example.com   <none>           <none>
collector-bd225  1/1    Running   0          134m    10.131.1.11   master2.example.com   <none>           <none>
collector-cvrzs  1/1    Running   0          134m    10.130.0.21   master3.example.com   <none>           <none>
collector-gpqg2  1/1    Running   0          134m    10.128.2.27   worker1.example.com   <none>           <none>
collector-l9j7j  1/1    Running   0          134m    10.129.2.31   worker2.example.com   <none>           <none>

15.2.6. Additional resources

Controlling pod placement using node taints

Chapter 16. Uninstalling Logging

You can remove logging from your OpenShift Container Platform cluster by removing installed Operators and related custom resources (CRs).

16.1. Uninstalling the logging

You can stop aggregating logs by deleting the Red Hat OpenShift Logging Operator and the ClusterLogging custom resource (CR).

Prerequisites

You have administrator permissions.
You have access to the Administrator perspective of the OpenShift Container Platform web console.

Procedure

Go to the Administration → Custom Resource Definitions page, and click ClusterLogging.
On the Custom Resource Definition Details page, click Instances.
Click the options menu next to the instance, and click Delete ClusterLogging.
Go to the Administration → Custom Resource Definitions page.
Click the options menu next to ClusterLogging, and select Delete Custom Resource Definition.
Warning
Deleting the ClusterLogging CR does not remove the persistent volume claims (PVCs). To delete the remaining PVCs, persistent volumes (PVs), and associated data, you must take further action. Releasing or deleting PVCs can delete PVs and cause data loss.
If you have created a ClusterLogForwarder CR, click the options menu next to ClusterLogForwarder, and then click Delete Custom Resource Definition.
Go to the Operators → Installed Operators page.
Click the options menu next to the Red Hat OpenShift Logging Operator, and then click Uninstall Operator.
Optional: Delete the openshift-logging project.
Warning
Deleting the openshift-logging project deletes everything in that namespace, including any persistent volume claims (PVCs). If you want to preserve logging data, do not delete the openshift-logging project.
1. Go to the Home → Projects page.
2. Click the options menu next to the openshift-logging project, and then click Delete Project.
3. Confirm the deletion by typing openshift-logging in the dialog box, and then click Delete.

16.2. Deleting logging PVCs

To keep persistent volume claims (PVCs) for reuse with other pods, keep the labels or PVC names that you need to reclaim the PVCs. If you do not want to keep the PVCs, you can delete them. If you want to recover storage space, you can also delete the persistent volumes (PVs).

Prerequisites

You have administrator permissions.
You have access to the Administrator perspective of the OpenShift Container Platform web console.

Procedure

Go to the Storage → Persistent Volume Claims page.
Click the options menu next to each PVC, and select Delete Persistent Volume Claim.

16.3. Uninstalling Loki

Prerequisites

You have administrator permissions.
You have access to the Administrator perspective of the OpenShift Container Platform web console.
If you have not already removed the Red Hat OpenShift Logging Operator and related resources, you have removed references to LokiStack from the ClusterLogging custom resource.

Procedure

Go to the Administration → Custom Resource Definitions page, and click LokiStack.
On the Custom Resource Definition Details page, click Instances.
Click the options menu next to the instance, and then click Delete LokiStack.
Go to the Administration → Custom Resource Definitions page.
Click the options menu next to LokiStack, and select Delete Custom Resource Definition.
Delete the object storage secret.
Go to the Operators → Installed Operators page.
Click the options menu next to the Loki Operator, and then click Uninstall Operator.
Optional: Delete the openshift-operators-redhat project.
Important
Do not delete the openshift-operators-redhat project if other global Operators are installed in this namespace.
1. Go to the Home → Projects page.
2. Click the options menu next to the openshift-operators-redhat project, and then click Delete Project.
3. Confirm the deletion by typing openshift-operators-redhat in the dialog box, and then click Delete.

16.4. Uninstalling Elasticsearch

Prerequisites

You have administrator permissions.
You have access to the Administrator perspective of the OpenShift Container Platform web console.
If you have not already removed the Red Hat OpenShift Logging Operator and related resources, you must remove references to Elasticsearch from the ClusterLogging custom resource.

Procedure

Go to the Administration → Custom Resource Definitions page, and click Elasticsearch.
On the Custom Resource Definition Details page, click Instances.
Click the options menu next to the instance, and then click Delete Elasticsearch.
Go to the Administration → Custom Resource Definitions page.
Click the options menu next to Elasticsearch, and select Delete Custom Resource Definition.
Delete the object storage secret.
Go to the Operators → Installed Operators page.
Click the options menu next to the OpenShift Elasticsearch Operator, and then click Uninstall Operator.
Optional: Delete the openshift-operators-redhat project.
Important
Do not delete the openshift-operators-redhat project if other global Operators are installed in this namespace.
1. Go to the Home → Projects page.
2. Click the options menu next to the openshift-operators-redhat project, and then click Delete Project.
3. Confirm the deletion by typing openshift-operators-redhat in the dialog box, and then click Delete.

16.5. Deleting Operators from a cluster using the CLI

Cluster administrators can delete installed Operators from a selected namespace by using the CLI.

Prerequisites

You have access to an OpenShift Container Platform cluster using an account with cluster-admin permissions.
The OpenShift CLI (oc) is installed on your workstation.

Procedure

Ensure the latest version of the subscribed operator (for example, serverless-operator) is identified in the currentCSV field.

$ oc get subscription.operators.coreos.com serverless-operator -n openshift-serverless -o yaml | grep currentCSV

Example output

  currentCSV: serverless-operator.v1.28.0

Delete the subscription (for example, serverless-operator):

$ oc delete subscription.operators.coreos.com serverless-operator -n openshift-serverless

Example output

subscription.operators.coreos.com "serverless-operator" deleted

Delete the CSV for the Operator in the target namespace using the currentCSV value from the previous step:

$ oc delete clusterserviceversion serverless-operator.v1.28.0 -n openshift-serverless

Example output

clusterserviceversion.operators.coreos.com "serverless-operator.v1.28.0" deleted

Additional resources

Reclaiming a persistent volume manually

Chapter 17. Log Record Fields

The following fields can be present in log records exported by the logging. Although log records are typically formatted as JSON objects, the same data model can be applied to other encodings.

To search these fields from Elasticsearch and Kibana, use the full dotted field name when searching. For example, with an Elasticsearch /_search URL, to look for a Kubernetes pod name, use /_search/q=kubernetes.pod_name:name-of-my-pod.

The top level fields may be present in every record.

message

The original log entry text, UTF-8 encoded. This field may be absent or empty if a non-empty structured field is present. See the description of structured for more.

Data type	text
Example value	`HAPPY`

structured

Original log entry as a structured object. This field may be present if the forwarder was configured to parse structured JSON logs. If the original log entry was a valid structured log, this field will contain an equivalent JSON structure. Otherwise this field will be empty or absent, and the message field will contain the original log message. The structured field can have any subfields that are included in the log message, there are no restrictions defined here.

Data type	group
Example value	map[message:starting fluentd worker pid=21631 ppid=21618 worker=0 pid:21631 ppid:21618 worker:0]

@timestamp

A UTC value that marks when the log payload was created or, if the creation time is not known, when the log payload was first collected. The “@” prefix denotes a field that is reserved for a particular use. By default, most tools look for “@timestamp” with ElasticSearch.

Data type	date
Example value	`2015-01-24 14:06:05.071000000 Z`

hostname

The name of the host where this log message originated. In a Kubernetes cluster, this is the same as kubernetes.host.

Data type

keyword

ipaddr4

The IPv4 address of the source server. Can be an array.

Data type

ipaddr6

The IPv6 address of the source server, if available. Can be an array.

Data type

level

The logging level from various sources, including rsyslog(severitytext property), a Python logging module, and others.

The following values come from syslog.h, and are preceded by their numeric equivalents:

0 = emerg, system is unusable.
1 = alert, action must be taken immediately.
2 = crit, critical conditions.
3 = err, error conditions.
4 = warn, warning conditions.
5 = notice, normal but significant condition.
6 = info, informational.
7 = debug, debug-level messages.

The two following values are not part of syslog.h but are widely used:

8 = trace, trace-level messages, which are more verbose than debug messages.
9 = unknown, when the logging system gets a value it does not recognize.

Map the log levels or priorities of other logging systems to their nearest match in the preceding list. For example, from python logging, you can match CRITICAL with crit, ERROR with err, and so on.

Data type	keyword
Example value	`info`

19.9.1. kubernetes.event.verb

The type of event, ADDED, MODIFIED, or DELETED

Data type	keyword
Example value	`ADDED`

19.9.2. kubernetes.event.metadata

Information related to the location and time of the event creation

Data type

group

19.9.2.1. kubernetes.event.metadata.name

The name of the object that triggered the event creation

Data type	keyword
Example value	`java-mainclass-1.14d888a4cfc24890`

19.9.2.2. kubernetes.event.metadata.namespace

The name of the namespace where the event originally occurred. Note that it differs from kubernetes.namespace_name, which is the namespace where the eventrouter application is deployed.

Data type	keyword
Example value	`default`

19.9.2.3. kubernetes.event.metadata.selfLink

A link to the event

Data type	keyword
Example value	`/api/v1/namespaces/javaj/events/java-mainclass-1.14d888a4cfc24890`

19.9.2.4. kubernetes.event.metadata.uid

The unique ID of the event

Data type	keyword
Example value	`d828ac69-7b58-11e7-9cf5-5254002f560c`

19.9.2.5. kubernetes.event.metadata.resourceVersion

A string that identifies the server’s internal version of the event. Clients can use this string to determine when objects have changed.

Data type	integer
Example value	`311987`

19.9.3. kubernetes.event.involvedObject

The object that the event is about.

Data type

group

19.9.3.1. kubernetes.event.involvedObject.kind

The type of object

Data type	keyword
Example value	`ReplicationController`

19.9.3.2. kubernetes.event.involvedObject.namespace

The namespace name of the involved object. Note that it may differ from kubernetes.namespace_name, which is the namespace where the eventrouter application is deployed.

Data type	keyword
Example value	`default`

19.9.3.3. kubernetes.event.involvedObject.name

The name of the object that triggered the event

Data type	keyword
Example value	`java-mainclass-1`

19.9.3.4. kubernetes.event.involvedObject.uid

The unique ID of the object

Data type	keyword
Example value	`e6bff941-76a8-11e7-8193-5254002f560c`

19.9.3.5. kubernetes.event.involvedObject.apiVersion

The version of kubernetes master API

Data type	keyword
Example value	`v1`

19.9.3.6. kubernetes.event.involvedObject.resourceVersion

A string that identifies the server’s internal version of the pod that triggered the event. Clients can use this string to determine when objects have changed.

Data type	keyword
Example value	`308882`

19.9.4. kubernetes.event.reason

A short machine-understandable string that gives the reason for generating this event

Data type	keyword
Example value	`SuccessfulCreate`

19.9.5. kubernetes.event.source_component

The component that reported this event

Data type	keyword
Example value	`replication-controller`

19.9.6. kubernetes.event.firstTimestamp

The time at which the event was first recorded

Data type	date
Example value	`2017-08-07 10:11:57.000000000 Z`

19.9.7. kubernetes.event.count

The number of times this event has occurred

Data type	integer
Example value	`1`

19.9.8. kubernetes.event.type

The type of event, Normal or Warning. New types could be added in the future.

Data type	keyword
Example value	`Normal`

Chapter 20. OpenShift

The namespace for openshift-logging specific metadata

Data type

group

20.1. openshift.labels

Labels added by the Cluster Log Forwarder configuration

Data type

group

Chapter 21. API reference

21.1. 5.6 Logging API reference

21.1.1. Logging 5.6 API reference

21.1.1.1. ClusterLogForwarder

ClusterLogForwarder is an API to configure forwarding logs.

You configure forwarding by specifying a list of pipelines, which forward from a set of named inputs to a set of named outputs.

There are built-in input names for common log categories, and you can define custom inputs to do additional filtering.

There is a built-in output name for the default openshift log store, but you can define your own outputs with a URL and other connection information to forward logs to other stores or processors, inside or outside the cluster.

For more details see the documentation on the API fields.

Property	Type	Description
spec	object	Specification of the desired behavior of ClusterLogForwarder
status	object	Status of the ClusterLogForwarder

21.1.1.1.1. .spec

21.1.1.1.1.1. Description

ClusterLogForwarderSpec defines how logs should be forwarded to remote targets.

21.1.1.1.1.1.1. Type

object

Property	Type	Description
inputs	array	(optional) Inputs are named filters for log messages to be forwarded.
outputDefaults	object	(optional) DEPRECATED OutputDefaults specify forwarder config explicitly for the default store.
outputs	array	(optional) Outputs are named destinations for log messages.
pipelines	array	Pipelines forward the messages selected by a set of inputs to a set of outputs.

21.1.1.1.2. .spec.inputs[]

21.1.1.1.2.1. Description

InputSpec defines a selector of log messages.

21.1.1.1.2.1.1. Type

array

Property	Type	Description
application	object	(optional) Application, if present, enables named set of `application` logs that
name	string	Name used to refer to the input of a `pipeline`.

21.1.1.1.3. .spec.inputs[].application

21.1.1.1.3.1. Description

Application log selector. All conditions in the selector must be satisfied (logical AND) to select logs.

21.1.1.1.3.1.1. Type

object

Property	Type	Description
namespaces	array	(optional) Namespaces from which to collect application logs.
selector	object	(optional) Selector for logs from pods with matching labels.

21.1.1.1.4. .spec.inputs[].application.namespaces[]

21.1.1.1.4.1. Description

21.1.1.1.4.1.1. Type

array

21.1.1.1.5. .spec.inputs[].application.selector

21.1.1.1.5.1. Description

A label selector is a label query over a set of resources.

21.1.1.1.5.1.1. Type

object

Property	Type	Description
matchLabels	object	(optional) matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels

21.1.1.1.6. .spec.inputs[].application.selector.matchLabels

21.1.1.1.6.1. Description

21.1.1.1.6.1.1. Type

object

21.1.1.1.7. .spec.outputDefaults

21.1.1.1.7.1. Description

21.1.1.1.7.1.1. Type

object

Property	Type	Description
elasticsearch	object	(optional) Elasticsearch OutputSpec default values

21.1.1.1.8. .spec.outputDefaults.elasticsearch

21.1.1.1.8.1. Description

ElasticsearchStructuredSpec is spec related to structured log changes to determine the elasticsearch index

21.1.1.1.8.1.1. Type

object

Property	Type	Description
enableStructuredContainerLogs	bool	(optional) EnableStructuredContainerLogs enables multi-container structured logs to allow
structuredTypeKey	string	(optional) StructuredTypeKey specifies the metadata key to be used as name of elasticsearch index
structuredTypeName	string	(optional) StructuredTypeName specifies the name of elasticsearch schema

21.1.1.1.9. .spec.outputs[]

21.1.1.1.9.1. Description

Output defines a destination for log messages.

21.1.1.1.9.1.1. Type

array

Property	Type	Description
syslog	object	(optional)
fluentdForward	object	(optional)
elasticsearch	object	(optional)
kafka	object	(optional)
cloudwatch	object	(optional)
loki	object	(optional)
googleCloudLogging	object	(optional)
splunk	object	(optional)
name	string	Name used to refer to the output from a `pipeline`.
secret	object	(optional) Secret for authentication.
tls	object	TLS contains settings for controlling options on TLS client connections.
type	string	Type of output plugin.
url	string	(optional) URL to send log records to.

21.1.1.1.10. .spec.outputs[].secret

21.1.1.1.10.1. Description

OutputSecretSpec is a secret reference containing name only, no namespace.

21.1.1.1.10.1.1. Type

object

Property	Type	Description
name	string	Name of a secret in the namespace configured for log forwarder secrets.

21.1.1.1.11. .spec.outputs[].tls

21.1.1.1.11.1. Description

OutputTLSSpec contains options for TLS connections that are agnostic to the output type.

21.1.1.1.11.1.1. Type

object

Property	Type	Description
insecureSkipVerify	bool	If InsecureSkipVerify is true, then the TLS client will be configured to ignore errors with certificates.

21.1.1.1.12. .spec.pipelines[]

21.1.1.1.12.1. Description

PipelinesSpec link a set of inputs to a set of outputs.

21.1.1.1.12.1.1. Type

array

Property	Type	Description
detectMultilineErrors	bool	(optional) DetectMultilineErrors enables multiline error detection of container logs
inputRefs	array	InputRefs lists the names (`input.name`) of inputs to this pipeline.
labels	object	(optional) Labels applied to log records passing through this pipeline.
name	string	(optional) Name is optional, but must be unique in the `pipelines` list if provided.
outputRefs	array	OutputRefs lists the names (`output.name`) of outputs from this pipeline.
parse	string	(optional) Parse enables parsing of log entries into structured logs

21.1.1.1.13. .spec.pipelines[].inputRefs[]

21.1.1.1.13.1. Description

21.1.1.1.13.1.1. Type

array

21.1.1.1.14. .spec.pipelines[].labels

21.1.1.1.14.1. Description

21.1.1.1.14.1.1. Type

object

21.1.1.1.15. .spec.pipelines[].outputRefs[]

21.1.1.1.15.1. Description

21.1.1.1.15.1.1. Type

array

21.1.1.1.16. .status

21.1.1.1.16.1. Description

ClusterLogForwarderStatus defines the observed state of ClusterLogForwarder

21.1.1.1.16.1.1. Type

object

Property	Type	Description
conditions	object	Conditions of the log forwarder.
inputs	Conditions	Inputs maps input name to condition of the input.
outputs	Conditions	Outputs maps output name to condition of the output.
pipelines	Conditions	Pipelines maps pipeline name to condition of the pipeline.

21.1.1.1.17. .status.conditions

21.1.1.1.17.1. Description

21.1.1.1.17.1.1. Type

object

21.1.1.1.18. .status.inputs

21.1.1.1.18.1. Description

21.1.1.1.18.1.1. Type

Conditions

21.1.1.1.19. .status.outputs

21.1.1.1.19.1. Description

21.1.1.1.19.1.1. Type

Conditions

21.1.1.1.20. .status.pipelines

21.1.1.1.20.1. Description

21.1.1.1.20.1.1. Type

Conditions== ClusterLogging A Red Hat OpenShift Logging instance. ClusterLogging is the Schema for the clusterloggings API

Property	Type	Description
spec	object	Specification of the desired behavior of ClusterLogging
status	object	Status defines the observed state of ClusterLogging

21.1.1.1.21. .spec

21.1.1.1.21.1. Description

ClusterLoggingSpec defines the desired state of ClusterLogging

21.1.1.1.21.1.1. Type

object

Property	Type	Description
collection	object	Specification of the Collection component for the cluster
curation	object	(DEPRECATED) (optional) Deprecated. Specification of the Curation component for the cluster
forwarder	object	(DEPRECATED) (optional) Deprecated. Specification for Forwarder component for the cluster
logStore	object	(optional) Specification of the Log Storage component for the cluster
managementState	string	(optional) Indicator if the resource is 'Managed' or 'Unmanaged' by the operator
visualization	object	(optional) Specification of the Visualization component for the cluster

21.1.1.1.22. .spec.collection

21.1.1.1.22.1. Description

This is the struct that will contain information pertinent to Log and event collection

21.1.1.1.22.1.1. Type

object

Property	Type	Description
resources	object	(optional) The resource requirements for the collector
nodeSelector	object	(optional) Define which Nodes the Pods are scheduled on.
tolerations	array	(optional) Define the tolerations the Pods will accept
fluentd	object	(optional) Fluentd represents the configuration for forwarders of type fluentd.
logs	object	(DEPRECATED) (optional) Deprecated. Specification of Log Collection for the cluster
type	string	(optional) The type of Log Collection to configure

21.1.1.1.23. .spec.collection.fluentd

21.1.1.1.23.1. Description

FluentdForwarderSpec represents the configuration for forwarders of type fluentd.

21.1.1.1.23.1.1. Type

object

Property	Type	Description
buffer	object
inFile	object

21.1.1.1.24. .spec.collection.fluentd.buffer

21.1.1.1.24.1. Description

FluentdBufferSpec represents a subset of fluentd buffer parameters to tune the buffer configuration for all fluentd outputs. It supports a subset of parameters to configure buffer and queue sizing, flush operations and retry flushing.

For general parameters refer to: https://docs.fluentd.org/configuration/buffer-section#buffering-parameters

For flush parameters refer to: https://docs.fluentd.org/configuration/buffer-section#flushing-parameters

For retry parameters refer to: https://docs.fluentd.org/configuration/buffer-section#retries-parameters

21.1.1.1.24.1.1. Type

object

Property	Type	Description
chunkLimitSize	string	(optional) ChunkLimitSize represents the maximum size of each chunk. Events will be
flushInterval	string	(optional) FlushInterval represents the time duration to wait between two consecutive flush
flushMode	string	(optional) FlushMode represents the mode of the flushing thread to write chunks. The mode
flushThreadCount	int	(optional) FlushThreadCount represents the number of threads used by the fluentd buffer
overflowAction	string	(optional) OverflowAction represents the action for the fluentd buffer plugin to
retryMaxInterval	string	(optional) RetryMaxInterval represents the maximum time interval for exponential backoff
retryTimeout	string	(optional) RetryTimeout represents the maximum time interval to attempt retries before giving up
retryType	string	(optional) RetryType represents the type of retrying flush operations. Flush operations can
retryWait	string	(optional) RetryWait represents the time duration between two consecutive retries to flush
totalLimitSize	string	(optional) TotalLimitSize represents the threshold of node space allowed per fluentd

21.1.1.1.25. .spec.collection.fluentd.inFile

21.1.1.1.25.1. Description

FluentdInFileSpec represents a subset of fluentd in-tail plugin parameters to tune the configuration for all fluentd in-tail inputs.

For general parameters refer to: https://docs.fluentd.org/input/tail#parameters

21.1.1.1.25.1.1. Type

object

Property	Type	Description
readLinesLimit	int	(optional) ReadLinesLimit represents the number of lines to read with each I/O operation

21.1.1.1.26. .spec.collection.logs

21.1.1.1.26.1. Description

21.1.1.1.26.1.1. Type

object

Property	Type	Description
fluentd	object	Specification of the Fluentd Log Collection component
type	string	The type of Log Collection to configure

21.1.1.1.27. .spec.collection.logs.fluentd

21.1.1.1.27.1. Description

CollectorSpec is spec to define scheduling and resources for a collector

21.1.1.1.27.1.1. Type

object

Property	Type	Description
nodeSelector	object	(optional) Define which Nodes the Pods are scheduled on.
resources	object	(optional) The resource requirements for the collector
tolerations	array	(optional) Define the tolerations the Pods will accept

21.1.1.1.28. .spec.collection.logs.fluentd.nodeSelector

21.1.1.1.28.1. Description

21.1.1.1.28.1.1. Type

object

21.1.1.1.29. .spec.collection.logs.fluentd.resources

21.1.1.1.29.1. Description

21.1.1.1.29.1.1. Type

object

Property	Type	Description
limits	object	(optional) Limits describes the maximum amount of compute resources allowed.
requests	object	(optional) Requests describes the minimum amount of compute resources required.

21.1.1.1.30. .spec.collection.logs.fluentd.resources.limits

21.1.1.1.30.1. Description

21.1.1.1.30.1.1. Type

object

21.1.1.1.31. .spec.collection.logs.fluentd.resources.requests

21.1.1.1.31.1. Description

21.1.1.1.31.1.1. Type

object

21.1.1.1.32. .spec.collection.logs.fluentd.tolerations[]

21.1.1.1.32.1. Description

21.1.1.1.32.1.1. Type

array

Property	Type	Description
effect	string	(optional) Effect indicates the taint effect to match. Empty means match all taint effects.
key	string	(optional) Key is the taint key that the toleration applies to. Empty means match all taint keys.
operator	string	(optional) Operator represents a key's relationship to the value.
tolerationSeconds	int	(optional) TolerationSeconds represents the period of time the toleration (which must be
value	string	(optional) Value is the taint value the toleration matches to.

21.1.1.1.33. .spec.collection.logs.fluentd.tolerations[].tolerationSeconds

21.1.1.1.33.1. Description

21.1.1.1.33.1.1. Type

21.1.1.1.34. .spec.curation

21.1.1.1.34.1. Description

This is the struct that will contain information pertinent to Log curation (Curator)

21.1.1.1.34.1.1. Type

object

Property	Type	Description
curator	object	The specification of curation to configure
type	string	The kind of curation to configure

21.1.1.1.35. .spec.curation.curator

21.1.1.1.35.1. Description

21.1.1.1.35.1.1. Type

object

Property	Type	Description
nodeSelector	object	Define which Nodes the Pods are scheduled on.
resources	object	(optional) The resource requirements for Curator
schedule	string	The cron schedule that the Curator job is run. Defaults to "30 3 * * *"
tolerations	array

21.1.1.1.36. .spec.curation.curator.nodeSelector

21.1.1.1.36.1. Description

21.1.1.1.36.1.1. Type

object

21.1.1.1.37. .spec.curation.curator.resources

21.1.1.1.37.1. Description

21.1.1.1.37.1.1. Type

object

Property	Type	Description
limits	object	(optional) Limits describes the maximum amount of compute resources allowed.
requests	object	(optional) Requests describes the minimum amount of compute resources required.

21.1.1.1.38. .spec.curation.curator.resources.limits

21.1.1.1.38.1. Description

21.1.1.1.38.1.1. Type

object

21.1.1.1.39. .spec.curation.curator.resources.requests

21.1.1.1.39.1. Description

21.1.1.1.39.1.1. Type

object

21.1.1.1.40. .spec.curation.curator.tolerations[]

21.1.1.1.40.1. Description

21.1.1.1.40.1.1. Type

array

Property	Type	Description
effect	string	(optional) Effect indicates the taint effect to match. Empty means match all taint effects.
key	string	(optional) Key is the taint key that the toleration applies to. Empty means match all taint keys.
operator	string	(optional) Operator represents a key's relationship to the value.
tolerationSeconds	int	(optional) TolerationSeconds represents the period of time the toleration (which must be
value	string	(optional) Value is the taint value the toleration matches to.

21.1.1.1.41. .spec.curation.curator.tolerations[].tolerationSeconds

21.1.1.1.41.1. Description

21.1.1.1.41.1.1. Type

21.1.1.1.42. .spec.forwarder

21.1.1.1.42.1. Description

ForwarderSpec contains global tuning parameters for specific forwarder implementations. This field is not required for general use, it allows performance tuning by users familiar with the underlying forwarder technology. Currently supported: fluentd.

21.1.1.1.42.1.1. Type

object

Property	Type	Description
fluentd	object

21.1.1.1.43. .spec.forwarder.fluentd

21.1.1.1.43.1. Description

FluentdForwarderSpec represents the configuration for forwarders of type fluentd.

21.1.1.1.43.1.1. Type

object

Property	Type	Description
buffer	object
inFile	object

21.1.1.1.44. .spec.forwarder.fluentd.buffer

21.1.1.1.44.1. Description

For general parameters refer to: https://docs.fluentd.org/configuration/buffer-section#buffering-parameters

For flush parameters refer to: https://docs.fluentd.org/configuration/buffer-section#flushing-parameters

For retry parameters refer to: https://docs.fluentd.org/configuration/buffer-section#retries-parameters

21.1.1.1.44.1.1. Type

object

Property	Type	Description
chunkLimitSize	string	(optional) ChunkLimitSize represents the maximum size of each chunk. Events will be
flushInterval	string	(optional) FlushInterval represents the time duration to wait between two consecutive flush
flushMode	string	(optional) FlushMode represents the mode of the flushing thread to write chunks. The mode
flushThreadCount	int	(optional) FlushThreadCount reprents the number of threads used by the fluentd buffer
overflowAction	string	(optional) OverflowAction represents the action for the fluentd buffer plugin to
retryMaxInterval	string	(optional) RetryMaxInterval represents the maximum time interval for exponential backoff
retryTimeout	string	(optional) RetryTimeout represents the maximum time interval to attempt retries before giving up
retryType	string	(optional) RetryType represents the type of retrying flush operations. Flush operations can
retryWait	string	(optional) RetryWait represents the time duration between two consecutive retries to flush
totalLimitSize	string	(optional) TotalLimitSize represents the threshold of node space allowed per fluentd

21.1.1.1.45. .spec.forwarder.fluentd.inFile

21.1.1.1.45.1. Description

FluentdInFileSpec represents a subset of fluentd in-tail plugin parameters to tune the configuration for all fluentd in-tail inputs.

For general parameters refer to: https://docs.fluentd.org/input/tail#parameters

21.1.1.1.45.1.1. Type

object

Property	Type	Description
readLinesLimit	int	(optional) ReadLinesLimit represents the number of lines to read with each I/O operation

21.1.1.1.46. .spec.logStore

21.1.1.1.46.1. Description

The LogStoreSpec contains information about how logs are stored.

21.1.1.1.46.1.1. Type

object

Property	Type	Description
elasticsearch	object	Specification of the Elasticsearch Log Store component
lokistack	object	LokiStack contains information about which LokiStack to use for log storage if Type is set to LogStoreTypeLokiStack.
retentionPolicy	object	(optional) Retention policy defines the maximum age for an index after which it should be deleted
type	string	The Type of Log Storage to configure. The operator currently supports either using ElasticSearch

21.1.1.1.47. .spec.logStore.elasticsearch

21.1.1.1.47.1. Description

21.1.1.1.47.1.1. Type

object

Property	Type	Description
nodeCount	int	Number of nodes to deploy for Elasticsearch
nodeSelector	object	Define which Nodes the Pods are scheduled on.
proxy	object	Specification of the Elasticsearch Proxy component
redundancyPolicy	string	(optional)
resources	object	(optional) The resource requirements for Elasticsearch
storage	object	(optional) The storage specification for Elasticsearch data nodes
tolerations	array

21.1.1.1.48. .spec.logStore.elasticsearch.nodeSelector

21.1.1.1.48.1. Description

21.1.1.1.48.1.1. Type

object

21.1.1.1.49. .spec.logStore.elasticsearch.proxy

21.1.1.1.49.1. Description

21.1.1.1.49.1.1. Type

object

Property	Type	Description
resources	object

21.1.1.1.50. .spec.logStore.elasticsearch.proxy.resources

21.1.1.1.50.1. Description

21.1.1.1.50.1.1. Type

object

Property	Type	Description
limits	object	(optional) Limits describes the maximum amount of compute resources allowed.
requests	object	(optional) Requests describes the minimum amount of compute resources required.

21.1.1.1.51. .spec.logStore.elasticsearch.proxy.resources.limits

21.1.1.1.51.1. Description

21.1.1.1.51.1.1. Type

object

21.1.1.1.52. .spec.logStore.elasticsearch.proxy.resources.requests

21.1.1.1.52.1. Description

21.1.1.1.52.1.1. Type

object

21.1.1.1.53. .spec.logStore.elasticsearch.resources

21.1.1.1.53.1. Description

21.1.1.1.53.1.1. Type

object

Property	Type	Description
limits	object	(optional) Limits describes the maximum amount of compute resources allowed.
requests	object	(optional) Requests describes the minimum amount of compute resources required.

21.1.1.1.54. .spec.logStore.elasticsearch.resources.limits

21.1.1.1.54.1. Description

21.1.1.1.54.1.1. Type

object

21.1.1.1.55. .spec.logStore.elasticsearch.resources.requests

21.1.1.1.55.1. Description

21.1.1.1.55.1.1. Type

object

21.1.1.1.56. .spec.logStore.elasticsearch.storage

21.1.1.1.56.1. Description

21.1.1.1.56.1.1. Type

object

Property	Type	Description
size	object	The max storage capacity for the node to provision.
storageClassName	string	(optional) The name of the storage class to use with creating the node's PVC.

21.1.1.1.57. .spec.logStore.elasticsearch.storage.size

21.1.1.1.57.1. Description

21.1.1.1.57.1.1. Type

object

Property	Type	Description
Format	string	Change Format at will. See the comment for Canonicalize for
d	object	d is the quantity in inf.Dec form if d.Dec != nil
i	int	i is the quantity in int64 scaled form, if d.Dec == nil
s	string	s is the generated value of this quantity to avoid recalculation

21.1.1.1.58. .spec.logStore.elasticsearch.storage.size.d

21.1.1.1.58.1. Description

21.1.1.1.58.1.1. Type

object

Property	Type	Description
Dec	object

21.1.1.1.59. .spec.logStore.elasticsearch.storage.size.d.Dec

21.1.1.1.59.1. Description

21.1.1.1.59.1.1. Type

object

Property	Type	Description
scale	int
unscaled	object

21.1.1.1.60. .spec.logStore.elasticsearch.storage.size.d.Dec.unscaled

21.1.1.1.60.1. Description

21.1.1.1.60.1.1. Type

object

Property	Type	Description
abs	Word	sign
neg	bool

21.1.1.1.61. .spec.logStore.elasticsearch.storage.size.d.Dec.unscaled.abs

21.1.1.1.61.1. Description

21.1.1.1.61.1.1. Type

Word

21.1.1.1.62. .spec.logStore.elasticsearch.storage.size.i

21.1.1.1.62.1. Description

21.1.1.1.62.1.1. Type

Property	Type	Description
scale	int
value	int

21.1.1.1.63. .spec.logStore.elasticsearch.tolerations[]

21.1.1.1.63.1. Description

21.1.1.1.63.1.1. Type

array

Property	Type	Description
effect	string	(optional) Effect indicates the taint effect to match. Empty means match all taint effects.
key	string	(optional) Key is the taint key that the toleration applies to. Empty means match all taint keys.
operator	string	(optional) Operator represents a key's relationship to the value.
tolerationSeconds	int	(optional) TolerationSeconds represents the period of time the toleration (which must be
value	string	(optional) Value is the taint value the toleration matches to.

21.1.1.1.64. .spec.logStore.elasticsearch.tolerations[].tolerationSeconds

21.1.1.1.64.1. Description

21.1.1.1.64.1.1. Type

21.1.1.1.65. .spec.logStore.lokistack

21.1.1.1.65.1. Description

LokiStackStoreSpec is used to set up cluster-logging to use a LokiStack as logging storage. It points to an existing LokiStack in the same namespace.

21.1.1.1.65.1.1. Type

object

Property	Type	Description
name	string	Name of the LokiStack resource.

21.1.1.1.66. .spec.logStore.retentionPolicy

21.1.1.1.66.1. Description

21.1.1.1.66.1.1. Type

object

Property	Type	Description
application	object
audit	object
infra	object

21.1.1.1.67. .spec.logStore.retentionPolicy.application

21.1.1.1.67.1. Description

21.1.1.1.67.1.1. Type

object

Property	Type	Description
diskThresholdPercent	int	(optional) The threshold percentage of ES disk usage that when reached, old indices should be deleted (e.g. 75)
maxAge	string	(optional)
namespaceSpec	array	(optional) The per namespace specification to delete documents older than a given minimum age
pruneNamespacesInterval	string	(optional) How often to run a new prune-namespaces job

21.1.1.1.68. .spec.logStore.retentionPolicy.application.namespaceSpec[]

21.1.1.1.68.1. Description

21.1.1.1.68.1.1. Type

array

Property	Type	Description
minAge	string	(optional) Delete the records matching the namespaces which are older than this MinAge (e.g. 1d)
namespace	string	Target Namespace to delete logs older than MinAge (defaults to 7d)

21.1.1.1.69. .spec.logStore.retentionPolicy.audit

21.1.1.1.69.1. Description

21.1.1.1.69.1.1. Type

object

Property	Type	Description
diskThresholdPercent	int	(optional) The threshold percentage of ES disk usage that when reached, old indices should be deleted (e.g. 75)
maxAge	string	(optional)
namespaceSpec	array	(optional) The per namespace specification to delete documents older than a given minimum age
pruneNamespacesInterval	string	(optional) How often to run a new prune-namespaces job

21.1.1.1.70. .spec.logStore.retentionPolicy.audit.namespaceSpec[]

21.1.1.1.70.1. Description

21.1.1.1.70.1.1. Type

array

Property	Type	Description
minAge	string	(optional) Delete the records matching the namespaces which are older than this MinAge (e.g. 1d)
namespace	string	Target Namespace to delete logs older than MinAge (defaults to 7d)

21.1.1.1.71. .spec.logStore.retentionPolicy.infra

21.1.1.1.71.1. Description

21.1.1.1.71.1.1. Type

object

Property	Type	Description
diskThresholdPercent	int	(optional) The threshold percentage of ES disk usage that when reached, old indices should be deleted (e.g. 75)
maxAge	string	(optional)
namespaceSpec	array	(optional) The per namespace specification to delete documents older than a given minimum age
pruneNamespacesInterval	string	(optional) How often to run a new prune-namespaces job

21.1.1.1.72. .spec.logStore.retentionPolicy.infra.namespaceSpec[]

21.1.1.1.72.1. Description

21.1.1.1.72.1.1. Type

array

Property	Type	Description
minAge	string	(optional) Delete the records matching the namespaces which are older than this MinAge (e.g. 1d)
namespace	string	Target Namespace to delete logs older than MinAge (defaults to 7d)

21.1.1.1.73. .spec.visualization

21.1.1.1.73.1. Description

This is the struct that will contain information pertinent to Log visualization (Kibana)

21.1.1.1.73.1.1. Type

object

Property	Type	Description
kibana	object	Specification of the Kibana Visualization component
type	string	The type of Visualization to configure

21.1.1.1.74. .spec.visualization.kibana

21.1.1.1.74.1. Description

21.1.1.1.74.1.1. Type

object

Property	Type	Description
nodeSelector	object	Define which Nodes the Pods are scheduled on.
proxy	object	Specification of the Kibana Proxy component
replicas	int	Number of instances to deploy for a Kibana deployment
resources	object	(optional) The resource requirements for Kibana
tolerations	array

21.1.1.1.75. .spec.visualization.kibana.nodeSelector

21.1.1.1.75.1. Description

21.1.1.1.75.1.1. Type

object

21.1.1.1.76. .spec.visualization.kibana.proxy

21.1.1.1.76.1. Description

21.1.1.1.76.1.1. Type

object

Property	Type	Description
resources	object

21.1.1.1.77. .spec.visualization.kibana.proxy.resources

21.1.1.1.77.1. Description

21.1.1.1.77.1.1. Type

object

Property	Type	Description
limits	object	(optional) Limits describes the maximum amount of compute resources allowed.
requests	object	(optional) Requests describes the minimum amount of compute resources required.

21.1.1.1.78. .spec.visualization.kibana.proxy.resources.limits

21.1.1.1.78.1. Description

21.1.1.1.78.1.1. Type

object

21.1.1.1.79. .spec.visualization.kibana.proxy.resources.requests

21.1.1.1.79.1. Description

21.1.1.1.79.1.1. Type

object

21.1.1.1.80. .spec.visualization.kibana.replicas

21.1.1.1.80.1. Description

21.1.1.1.80.1.1. Type

21.1.1.1.81. .spec.visualization.kibana.resources

21.1.1.1.81.1. Description

21.1.1.1.81.1.1. Type

object

Property	Type	Description
limits	object	(optional) Limits describes the maximum amount of compute resources allowed.
requests	object	(optional) Requests describes the minimum amount of compute resources required.

21.1.1.1.82. .spec.visualization.kibana.resources.limits

21.1.1.1.82.1. Description

21.1.1.1.82.1.1. Type

object

21.1.1.1.83. .spec.visualization.kibana.resources.requests

21.1.1.1.83.1. Description

21.1.1.1.83.1.1. Type

object

21.1.1.1.84. .spec.visualization.kibana.tolerations[]

21.1.1.1.84.1. Description

21.1.1.1.84.1.1. Type

array

Property	Type	Description
effect	string	(optional) Effect indicates the taint effect to match. Empty means match all taint effects.
key	string	(optional) Key is the taint key that the toleration applies to. Empty means match all taint keys.
operator	string	(optional) Operator represents a key's relationship to the value.
tolerationSeconds	int	(optional) TolerationSeconds represents the period of time the toleration (which must be
value	string	(optional) Value is the taint value the toleration matches to.

21.1.1.1.85. .spec.visualization.kibana.tolerations[].tolerationSeconds

21.1.1.1.85.1. Description

21.1.1.1.85.1.1. Type

21.1.1.1.86. .status

21.1.1.1.86.1. Description

ClusterLoggingStatus defines the observed state of ClusterLogging

21.1.1.1.86.1.1. Type

object

Property	Type	Description
collection	object	(optional)
conditions	object	(optional)
curation	object	(optional)
logStore	object	(optional)
visualization	object	(optional)

21.1.1.1.87. .status.collection

21.1.1.1.87.1. Description

21.1.1.1.87.1.1. Type

object

Property	Type	Description
logs	object	(optional)

21.1.1.1.88. .status.collection.logs

21.1.1.1.88.1. Description

21.1.1.1.88.1.1. Type

object

Property	Type	Description
fluentdStatus	object	(optional)

21.1.1.1.89. .status.collection.logs.fluentdStatus

21.1.1.1.89.1. Description

21.1.1.1.89.1.1. Type

object

Property	Type	Description
clusterCondition	object	(optional)
daemonSet	string	(optional)
nodes	object	(optional)
pods	string	(optional)

21.1.1.1.90. .status.collection.logs.fluentdStatus.clusterCondition

21.1.1.1.90.1. Description

operator-sdk generate crds does not allow map-of-slice, must use a named type.

21.1.1.1.90.1.1. Type

object

21.1.1.1.91. .status.collection.logs.fluentdStatus.nodes

21.1.1.1.91.1. Description

21.1.1.1.91.1.1. Type

object

21.1.1.1.92. .status.conditions

21.1.1.1.92.1. Description

21.1.1.1.92.1.1. Type

object

21.1.1.1.93. .status.curation

21.1.1.1.93.1. Description

21.1.1.1.93.1.1. Type

object

Property	Type	Description
curatorStatus	array	(optional)

21.1.1.1.94. .status.curation.curatorStatus[]

21.1.1.1.94.1. Description

21.1.1.1.94.1.1. Type

array

Property	Type	Description
clusterCondition	object	(optional)
cronJobs	string	(optional)
schedules	string	(optional)
suspended	bool	(optional)

21.1.1.1.95. .status.curation.curatorStatus[].clusterCondition

21.1.1.1.95.1. Description

operator-sdk generate crds does not allow map-of-slice, must use a named type.

21.1.1.1.95.1.1. Type

object

21.1.1.1.96. .status.logStore

21.1.1.1.96.1. Description

21.1.1.1.96.1.1. Type

object

Property	Type	Description
elasticsearchStatus	array	(optional)

21.1.1.1.97. .status.logStore.elasticsearchStatus[]

21.1.1.1.97.1. Description

21.1.1.1.97.1.1. Type

array

Property	Type	Description
cluster	object	(optional)
clusterConditions	object	(optional)
clusterHealth	string	(optional)
clusterName	string	(optional)
deployments	array	(optional)
nodeConditions	object	(optional)
nodeCount	int	(optional)
pods	object	(optional)
replicaSets	array	(optional)
shardAllocationEnabled	string	(optional)
statefulSets	array	(optional)

21.1.1.1.98. .status.logStore.elasticsearchStatus[].cluster

21.1.1.1.98.1. Description

21.1.1.1.98.1.1. Type

object

Property	Type	Description
activePrimaryShards	int	The number of Active Primary Shards for the Elasticsearch Cluster
activeShards	int	The number of Active Shards for the Elasticsearch Cluster
initializingShards	int	The number of Initializing Shards for the Elasticsearch Cluster
numDataNodes	int	The number of Data Nodes for the Elasticsearch Cluster
numNodes	int	The number of Nodes for the Elasticsearch Cluster
pendingTasks	int
relocatingShards	int	The number of Relocating Shards for the Elasticsearch Cluster
status	string	The current Status of the Elasticsearch Cluster
unassignedShards	int	The number of Unassigned Shards for the Elasticsearch Cluster

21.1.1.1.99. .status.logStore.elasticsearchStatus[].clusterConditions

21.1.1.1.99.1. Description

21.1.1.1.99.1.1. Type

object

21.1.1.1.100. .status.logStore.elasticsearchStatus[].deployments[]

21.1.1.1.100.1. Description

21.1.1.1.100.1.1. Type

array

21.1.1.1.101. .status.logStore.elasticsearchStatus[].nodeConditions

21.1.1.1.101.1. Description

21.1.1.1.101.1.1. Type

object

21.1.1.1.102. .status.logStore.elasticsearchStatus[].pods

21.1.1.1.102.1. Description

21.1.1.1.102.1.1. Type

object

21.1.1.1.103. .status.logStore.elasticsearchStatus[].replicaSets[]

21.1.1.1.103.1. Description

21.1.1.1.103.1.1. Type

array

21.1.1.1.104. .status.logStore.elasticsearchStatus[].statefulSets[]

21.1.1.1.104.1. Description

21.1.1.1.104.1.1. Type

array

21.1.1.1.105. .status.visualization

21.1.1.1.105.1. Description

21.1.1.1.105.1.1. Type

object

Property	Type	Description
kibanaStatus	array	(optional)

21.1.1.1.106. .status.visualization.kibanaStatus[]

21.1.1.1.106.1. Description

21.1.1.1.106.1.1. Type

array

Property	Type	Description
clusterCondition	object	(optional)
deployment	string	(optional)
pods	string	(optional) The status for each of the Kibana pods for the Visualization component
replicaSets	array	(optional)
replicas	int	(optional)

21.1.1.1.107. .status.visualization.kibanaStatus[].clusterCondition

21.1.1.1.107.1. Description

21.1.1.1.107.1.1. Type

object

21.1.1.1.108. .status.visualization.kibanaStatus[].replicaSets[]

21.1.1.1.108.1. Description

21.1.1.1.108.1.1. Type

array

Chapter 22. Glossary

This glossary defines common terms that are used in the logging documentation.

Annotation: You can use annotations to attach metadata to objects.
Red Hat OpenShift Logging Operator: The Red Hat OpenShift Logging Operator provides a set of APIs to control the collection and forwarding of application, infrastructure, and audit logs.
Custom resource (CR): A CR is an extension of the Kubernetes API. To configure the logging and log forwarding, you can customize the ClusterLogging and the ClusterLogForwarder custom resources.
Event router: The event router is a pod that watches OpenShift Container Platform events. It collects logs by using the logging.
Fluentd: Fluentd is a log collector that resides on each OpenShift Container Platform node. It gathers application, infrastructure, and audit logs and forwards them to different outputs.
Garbage collection: Garbage collection is the process of cleaning up cluster resources, such as terminated containers and images that are not referenced by any running pods.
Elasticsearch: Elasticsearch is a distributed search and analytics engine. OpenShift Container Platform uses Elasticsearch as a default log store for the logging.
OpenShift Elasticsearch Operator: The OpenShift Elasticsearch Operator is used to run an Elasticsearch cluster on OpenShift Container Platform. The OpenShift Elasticsearch Operator provides self-service for the Elasticsearch cluster operations and is used by the logging.
Indexing: Indexing is a data structure technique that is used to quickly locate and access data. Indexing optimizes the performance by minimizing the amount of disk access required when a query is processed.
JSON logging: The Log Forwarding API enables you to parse JSON logs into a structured object and forward them to either the logging managed Elasticsearch or any other third-party system supported by the Log Forwarding API.
Kibana: Kibana is a browser-based console interface to query, discover, and visualize your Elasticsearch data through histograms, line graphs, and pie charts.
Kubernetes API server: Kubernetes API server validates and configures data for the API objects.
Labels: Labels are key-value pairs that you can use to organize and select subsets of objects, such as a pod.
Logging: With the logging, you can aggregate application, infrastructure, and audit logs throughout your cluster. You can also store them to a default log store, forward them to third party systems, and query and visualize the stored logs in the default log store.
Logging collector: A logging collector collects logs from the cluster, formats them, and forwards them to the log store or third party systems.
Log store: A log store is used to store aggregated logs. You can use an internal log store or forward logs to external log stores.
Log visualizer: Log visualizer is the user interface (UI) component you can use to view information such as logs, graphs, charts, and other metrics.
Node: A node is a worker machine in the OpenShift Container Platform cluster. A node is either a virtual machine (VM) or a physical machine.
Operators: Operators are the preferred method of packaging, deploying, and managing a Kubernetes application in an OpenShift Container Platform cluster. An Operator takes human operational knowledge and encodes it into software that is packaged and shared with customers.
Pod: A pod is the smallest logical unit in Kubernetes. A pod consists of one or more containers and runs on a worker node.
Role-based access control (RBAC): RBAC is a key security control to ensure that cluster users and workloads have access only to resources required to execute their roles.
Shards: Elasticsearch organizes log data from Fluentd into datastores, or indices, then subdivides each index into multiple pieces called shards.
Taint: Taints ensure that pods are scheduled onto appropriate nodes. You can apply one or more taints on a node.
Toleration: You can apply tolerations to pods. Tolerations allow the scheduler to schedule pods with matching taints.
Web console: A user interface (UI) to manage OpenShift Container Platform.

Legal Notice

OpenShift documentation is licensed under the Apache License 2.0 (https://www.apache.org/licenses/LICENSE-2.0).

Modified versions must remove all Red Hat trademarks.

Portions adapted from https://github.com/kubernetes-incubator/service-catalog/ with modifications by Red Hat.

Red Hat, Red Hat Enterprise Linux, the Red Hat logo, the Shadowman logo, JBoss, OpenShift, Fedora, the Infinity logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries.

Linux® is the registered trademark of Linus Torvalds in the United States and other countries.

Java® is a registered trademark of Oracle and/or its affiliates.

XFS® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries.

MySQL® is a registered trademark of MySQL AB in the United States, the European Union and other countries.

Node.js® is an official trademark of Joyent. Red Hat Software Collections is not formally related to or endorsed by the official Joyent Node.js open source or commercial project.

The OpenStack® Word Mark and OpenStack logo are either registered trademarks/service marks or trademarks/service marks of the OpenStack Foundation, in the United States and other countries and are used with the OpenStack Foundation’s permission. We are not affiliated with, endorsed or sponsored by the OpenStack Foundation, or the OpenStack community.

All other trademarks are the property of their respective owners.

Logging

Configuring and using logging in OpenShift Container Platform

Chapter 1. Release notes

1.1. Logging 5.9

1.1.1. Logging 5.9.9

1.1.1.1. Bug fixes

1.1.1.2. CVEs

1.1.2. Logging 5.9.8

1.1.2.1. Bug fixes

1.1.2.2. CVEs

1.1.3. Logging 5.9.7

1.1.3.1. Bug fixes

1.1.3.2. CVEs

1.1.4. Logging 5.9.6

1.1.4.1. Bug fixes

1.1.4.2. CVEs

1.1.5. Logging 5.9.5

1.1.5.1. Bug Fixes

1.1.5.2. CVEs

1.1.6. Logging 5.9.4

1.1.6.1. Bug Fixes

1.1.6.2. CVEs

1.1.7. Logging 5.9.3

1.1.7.1. Bug Fixes

1.1.7.2. CVEs

1.1.8. Logging 5.9.2

1.1.8.1. Bug Fixes

1.1.8.2. CVEs

1.1.9. Logging 5.9.1

1.1.9.1. Enhancements

1.1.9.2. Bug Fixes

1.1.9.3. CVEs

1.1.10. Logging 5.9.0

1.1.10.1. Removal notice

1.1.10.2. Deprecation notice

1.1.10.3. Enhancements

1.1.10.3.1. Log Collection

1.1.10.3.2. Log Storage

1.1.10.4. Bug Fixes

1.1.10.5. Known Issues

1.1.10.6. CVEs

Chapter 2. Logging 6.0

2.1. Release notes

2.1.1. Logging 6.0.2

2.1.1.1. Bug fixes

2.1.1.2. CVEs

2.1.2. Logging 6.0.1

2.1.2.1. Bug fixes

2.1.2.2. CVEs

2.1.3. Logging 6.0.0

2.1.4. Removal notice

2.1.5. New features and enhancements

2.1.6. Technology Preview features

2.1.7. Bug fixes

2.1.8. CVEs

2.2. Logging 6.0

2.2.1. Inputs and Outputs

2.2.2. Receiver Input Type

2.2.3. Pipelines and Filters

2.2.4. Operator Behavior

2.2.5. Validation

2.2.5.1. Quick Start

2.3. Upgrading to Logging 6.0

2.3.1. Using the oc explain command

2.3.1.1. Resource Descriptions

2.3.1.2. Hierarchical Structure

2.3.1.3. Type Information

2.3.1.4. Default Values

2.3.2. Log Storage

2.3.3. Log Visualization

2.3.4. Log Collection and Forwarding

2.3.5. Management, Resource Allocation, and Workload Scheduling

2.3.6. Input Specifications

2.3.6.1. Application Inputs

2.3.6.2. Input Receivers

2.3.7. Output Specifications

2.3.8. Secrets and TLS Configuration

2.3.9. Red Hat Managed Elasticsearch

2.3.10. Red Hat Managed LokiStack

2.3.11. Filters and Pipeline Configuration

2.3.1. Using the `oc explain` command