Several 4.18 clusters across different z-streams have a degraded {{monitoring-plugin}} consoleplugin object in OSD/ROSA. The error reported in the console is:

    Failed to get a valid plugin manifest from /api/plugins/monitoring-plugin/

The {{cluster-monitoring-config}} configmap only contains scheduling configs for the component: 

$ oc get cm -n openshift-monitoring cluster-monitoring-config -o yaml | yq '.data["config.yaml"]' | yq '.monitoringPlugin'
nodeSelector:
  node-role.kubernetes.io/infra: ''
tolerations:
  - effect: NoSchedule
    key: node-role.kubernetes.io/infra
    operator: Exists


As a result of this degraded consoleplugin, the Observability tab never gets populated in the console sidebar, preventing access to the prometheus metrics and dashboard pages.
    

4.18.z
    

Very - found by default in every 4.18 cluster checked so far
    

    1. Deploy OSD/ROSA (possibly OCP, as well) 4.18 cluster
    2. {{monitoring-plugin}} will be degraded with "Failed to get a valid plugin manifest from /api/plugins/monitoring-plugin/"
    3. Observability tab will never appear on the console sidebar
    

No access to Observability tab
    

Can access the Observability tab