The kube-apiserver is restarting unexpectedly due to etcd encryption key rotation in RHOCP 4

Solution Verified - Updated -

Issue

  • Weekly, random restarts of the kube-apiserver Pods are experienced in OpenShift 4 cluster.

  • Control Plane components restart unexpectedly, and the following event can be seen in the logs of the kube-apiserver-operator:

    Event(v1.ObjectReference{Kind:"Deployment", Namespace:"openshift-kube-apiserver-operator", Name:"kube-apiserver-operator", UID:"58d40d83-ca5b-4029-b82a-fce2e96cad40", APIVersion:"apps/v1", ResourceVersion:"", FieldPath:""}): type: 'Normal' reason: 'EncryptionKeyCreated' Secret "encryption-key-openshift-kube-apiserver-7" successfully created: ["rotation-interval-has-passed"]

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4
  • Encrypted etcd
  • kube-apiserver

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