Fluentd, Kibana & Elasticsearch deprecation warning on web console in RHOCP4

Solution Verified - Updated

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4
  • Red Hat OpenShift Logging (RHOL)
    • 5
  • Fluentd
  • Elasticsearch
  • Kibana

Issue

  • After upgrading the RHOL version to 5.9, There is a warning on RHOCP web console regarding the deprecation of Fluentd, Kibana & Elasticsearch.

    Warning

Resolution

Important note: Elasticsearch operator in OpenShift 4.16 is not supported for the Logging stack, and it is only supported for ServiceMesh, Tracing and Kiali. Refer to Missing the Red Hat Elasticsearch operator in OpenShift 4.16 for additional information.

The EFK stack is now deprecated in OpenShift 4, and it is recommended to migrate the LogStore from Elasticsearch to Loki, and switch the Collector from Fluentd to Vector. That is required if upgrading OpenShift to version 4.16. Refer to the following documents for the migration:

Note: As explained in does Red Hat support version drift between OpenShift Elasticsearch Operator and OpenShift Logging Operator starting from RHOL v5.9 in RHOCP 4: "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".

Root Cause

These are warnings that Fluentd, Kibana & Elasticsearch are deprecated and will be removed in a future version.

Diagnostic Steps

Verify the logStore, collection and visualization fields defined in the ClusterLogging instance:

$ oc get cl instance -o yaml -n openshift-logging
[...]
spec:
  collection:
    type: fluentd  --> fluentd is defined as Collector
  logStore:
    elasticsearch:  --> elasticsearch is defined as Logstore
      nodeCount: 1
      redundancyPolicy: ZeroRedundancy
      resources:
        requests:
          memory: 2Gi
    retentionPolicy:
      application:
        maxAge: 1h
    type: elasticsearch
  managementState: Managed
  visualization:
    kibana: --> Kibana is used for Visualizer.
      replicas: 1
    type: kibana
[...]
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