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Chapter 4. Network Observability Operator in OpenShift Container Platform
Network Observability is an OpenShift operator that deploys a monitoring pipeline to collect and enrich network traffic flows that are produced by the Network Observability eBPF agent.
4.1. Viewing statuses
The Network Observability Operator provides the Flow Collector API. When a Flow Collector resource is created, it deploys pods and services to create and store network flows in the Loki log store, as well as to display dashboards, metrics, and flows in the OpenShift Container Platform web console.
Procedure
Run the following command to view the state of
FlowCollector:$ oc get flowcollector/cluster
Example output
NAME AGENT SAMPLING (EBPF) DEPLOYMENT MODEL STATUS cluster EBPF 50 DIRECT Ready
Check the status of pods running in the
netobservnamespace by entering the following command:$ oc get pods -n netobserv
Example output
NAME READY STATUS RESTARTS AGE flowlogs-pipeline-56hbp 1/1 Running 0 147m flowlogs-pipeline-9plvv 1/1 Running 0 147m flowlogs-pipeline-h5gkb 1/1 Running 0 147m flowlogs-pipeline-hh6kf 1/1 Running 0 147m flowlogs-pipeline-w7vv5 1/1 Running 0 147m netobserv-plugin-cdd7dc6c-j8ggp 1/1 Running 0 147m
flowlogs-pipeline pods collect flows, enriches the collected flows, then send flows to the Loki storage. netobserv-plugin pods create a visualization plugin for the OpenShift Container Platform Console.
Check the status of pods running in the namespace
netobserv-privilegedby entering the following command:$ oc get pods -n netobserv-privileged
Example output
NAME READY STATUS RESTARTS AGE netobserv-ebpf-agent-4lpp6 1/1 Running 0 151m netobserv-ebpf-agent-6gbrk 1/1 Running 0 151m netobserv-ebpf-agent-klpl9 1/1 Running 0 151m netobserv-ebpf-agent-vrcnf 1/1 Running 0 151m netobserv-ebpf-agent-xf5jh 1/1 Running 0 151m
netobserv-ebpf-agent pods monitor network interfaces of the nodes to get flows and send them to flowlogs-pipeline pods.
If you are using the Loki Operator, check the status of pods running in the
openshift-operators-redhatnamespace by entering the following command:$ oc get pods -n openshift-operators-redhat
Example output
NAME READY STATUS RESTARTS AGE loki-operator-controller-manager-5f6cff4f9d-jq25h 2/2 Running 0 18h lokistack-compactor-0 1/1 Running 0 18h lokistack-distributor-654f87c5bc-qhkhv 1/1 Running 0 18h lokistack-distributor-654f87c5bc-skxgm 1/1 Running 0 18h lokistack-gateway-796dc6ff7-c54gz 2/2 Running 0 18h lokistack-index-gateway-0 1/1 Running 0 18h lokistack-index-gateway-1 1/1 Running 0 18h lokistack-ingester-0 1/1 Running 0 18h lokistack-ingester-1 1/1 Running 0 18h lokistack-ingester-2 1/1 Running 0 18h lokistack-querier-66747dc666-6vh5x 1/1 Running 0 18h lokistack-querier-66747dc666-cjr45 1/1 Running 0 18h lokistack-querier-66747dc666-xh8rq 1/1 Running 0 18h lokistack-query-frontend-85c6db4fbd-b2xfb 1/1 Running 0 18h lokistack-query-frontend-85c6db4fbd-jm94f 1/1 Running 0 18h
4.2. Network Observablity Operator architecture
The Network Observability Operator provides the FlowCollector API, which is instantiated at installation and configured to reconcile the eBPF agent, the flowlogs-pipeline, and the netobserv-plugin components. Only a single FlowCollector per cluster is supported.
The eBPF agent runs on each cluster node with some privileges to collect network flows. The flowlogs-pipeline receives the network flows data and enriches the data with Kubernetes identifiers. If you choose to use Loki, the flowlogs-pipeline sends flow logs data to Loki for storing and indexing. The netobserv-plugin, which is a dynamic OpenShift Container Platform web console plugin, queries Loki to fetch network flows data. Cluster-admins can view the data in the web console.
If you do not use Loki, you can generate metrics with Prometheus. Those metrics and their related dashboards are accessible in the web console. For more information, see "Network Observability without Loki".
If you are using the Kafka option, the eBPF agent sends the network flow data to Kafka, and the flowlogs-pipeline reads from the Kafka topic before sending to Loki, as shown in the following diagram.
Additional resources
4.3. Viewing Network Observability Operator status and configuration
You can inspect the status and view the details of the FlowCollector using the oc describe command.
Procedure
Run the following command to view the status and configuration of the Network Observability Operator:
$ oc describe flowcollector/cluster
