https://docs.openshift.com/container-platform/4.8/backup_and_restore/replacing-unhealthy-etcd-member.html#restore-replace-stopped-etcd-member_replacing-unhealthy-etcd-member

oc get etcd -o=jsonpath='{range .items[0].status.conditions[?(@.type=="EtcdMembersAvailable")]}{.message}{"\n"}'

oc get machines -A -ojsonpath='{range .items[*]}{@.status.nodeRef.name}{"\t"}{@.status.providerStatus.instanceState}{"\n"}' | grep -v running

oc get nodes -o jsonpath='{range .items[]}{"\n"}{.metadata.name}{"\t"}{range .spec.taints[]}{.key}{" "}' | grep unreachable

oc get pods -n openshift-etcd | grep -v etcd-quorum-guard | grep etcd

oc rsh -n openshift-etcd etcd-ocp-8wcjz-master-1

etcdctl member list -w table

+------------------+---------+--------------------+---------------------------+---------------------------+------------+ | ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER | +------------------+---------+--------------------+---------------------------+---------------------------+------------+ | 1ce6b972a3e5d2cc | started | ocp-8wcjz-master-0 | https://172.27.4.206:2380 | https://172.27.4.206:2379 | false |

oc get secrets -n openshift-etcd | grep ip-10-0-131-183.ec2.internal

delete all associated secrets

oc get machine clustername-8qw5l-master-0 -n openshift-machine-api -o yaml > new-master-machine.yaml

clean new-master-machine.yaml