Upgrade process gets stuck in the etcd operator. Etcd pod crashes with the error "Init:CrashLoopBackOff"

Solution Verified - Updated -

Issue

  • The error manifests once the cluster starts the upgrade from 4.12.z to 4.13.z.
  • Cluster upgrade process doesn't move forward.
  • Etcd pods keep crashing with the Init:CrashLoopBackOff.
  • Either restarting the pod or the node doesn't fix the issue.

Environment

  • Red Hat OpenShift Container Platform (RHOCP) 4.12.
  • Virtualized environments.
  • Baremetal hosts.

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