Red Hat SummitDieser Inhalt ist in der von Ihnen ausgewählten Sprache nicht verfügbar.
Chapter 21. 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
ClusterLoggingand theClusterLogForwardercustom 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.
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}