I deleted the my-cluster-secrets (the creation of the secrets is shown in the readme at OperatorHub.io | The registry for Kubernetes Operators) and reinstalled the operator.
After create a new instance I see the same result.
oc -n pxc get pods
NAME READY STATUS RESTARTS AGE
cluster1-haproxy-0 1/2 Running 0 106s
cluster1-pxc-0 2/3 Running 0 106s
percona-xtradb-cluster-operator-669c94886f-g44cs 1/1 Running 0 2m43s
Instance status in PerconaXtraDBClusters is still “State: initializing”.
The pxc-monit container shows again much of those lines:
2021/05/11 10:49:12 lookup cluster1-pxc on 10.30.0.10:53: no such host
So, no changes at all without the my-cluster-secrets secret. 