Retrieving Alertmanager status failed: retrieving stateful set failed: statefulsets.apps "alertmanager-main" not found

Solution Verified - Updated -

Issue

  • monitoring operator is in Degraded state with error:
Failed to rollout the stack. Error: running task Updating Alertmanager
      failed: waiting for Alertmanager object changes failed: waiting for Alertmanager
      openshift-monitoring/main: retrieving Alertmanager status failed: retrieving
      stateful set failed: statefulsets.apps "alertmanager-main" not found'
  • Tried to restart the monitoring operator but still failing and seeing:
"openshift-monitoring/cluster-monitoring-config" failed: running task Updating Alertmanager failed: waiting for Alertmanager object changes failed: waiting for Alertmanager openshift-monitoring/main: retrieving Alertmanager status failed: retrieving stateful set failed: statefulsets.apps "alertmanager-main" not found

Environment

  • Red Hat OpenShift Container Platform
    • 4.8.9

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