Verified with 4.4.0-0.nightly-2020-09-08-111845 change etcd leader by put in a typo in /etc/kubernetes/manifests/etcd-pod.yaml to make etcd pods down, then check event, the warning msg fired: 3m47s Warning EtcdLeaderChangeMetrics deployment/etcd-operator Detected 2.5 leader changes in last 5 minutes on "AWS" disk metrics are: etcd-ip-10-0-148-126.us-east-2.compute.internal=0.001993,etcd-ip-10-0-185-97.us-east-2.compute.internal=0.003454999999999999,etcd-ip-10-0-197-59.us-east-2.compute.internal=0.004200000000000011 2m48s Warning EtcdLeaderChangeMetrics deployment/etcd-operator Detected 2.5 leader changes in last 5 minutes on "AWS" disk metrics are: etcd-ip-10-0-148-126.us-east-2.compute.internal=0.001992999999999999,etcd-ip-10-0-185-97.us-east-2.compute.internal=0.003455000000000009,etcd-ip-10-0-197-59.us-east-2.compute.internal=0.00419999999999997 2m36s Warning ClusterMemberControllerUpdatingStatus deployment/etcd-operator rpc error: code = Unknown desc = OK: HTTP status code 200; transport: missing content-type field 89s Warning UnhealthyEtcdMember deployment/etcd-operator unhealthy members: ip-10-0-197-59.us-east-2.compute.internal,ip-10-0-185-97.us-east-2.compute.internal 89s Warning EtcdLeaderChangeMetrics deployment/etcd-operator Detected 5 leader changes in last 5 minutes on "AWS" disk metrics are: etcd-ip-10-0-148-126.us-east-2.compute.internal=0.001992999999999999,etcd-ip-10-0-185-97.us-east-2.compute.internal=0.003454999999999981,etcd-ip-10-0-197-59.us-east-2.compute.internal=0.004199999999999969 48s Warning EtcdLeaderChangeMetrics deployment/etcd-operator Detected 6.25 leader changes in last 5 minutes on "AWS" disk metrics are: etcd-ip-10-0-148-126.us-east-2.compute.internal=0.0019929999999999995,etcd-ip-10-0-185-97.us-east-2.compute.internal=0.003454999999999998,etcd-ip-10-0-197-59.us-east-2.compute.internal=0.004199999999999979
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (OpenShift Container Platform 4.4.21 bug fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:3605