etcd cannot start

[alochym01]

i use vitess-operator. there is problem with etcd from logs

Events:
  Type     Reason     Age               From               Message
  ----     ------     ----              ----               -------
  Normal   Scheduled  29s               default-scheduler  Successfully assigned default/example-etcd-faf13de3-1 to elastic-01
  Normal   Pulled     30s               kubelet            Container image "quay.io/coreos/etcd:v3.3.13" already present on machine
  Normal   Created    29s               kubelet            Created container etcd
  Normal   Started    29s               kubelet            Started container etcd
  Warning  Unhealthy  5s (x4 over 20s)  kubelet            Readiness probe failed: 127.0.0.1:2379 is unhealthy: failed to commit proposal: context deadline exceeded
Error: unhealthy cluster

how to fix it,
thank you