Error :no available volume zone in Kubernetes

Symptom:

   When we create deployment/statefulset/pod in OKE (Oracle Kubernete Engine), somehow we hit below error:
Warning  FailedScheduling  3s (x7 over 3m)   default-scheduler  0/3 nodes are available: 1 node(s) didn't match node selector, 2 node(s) had no available volume zone.

Solution:

   One of the reasons is the we use OKE auto provision for our block volume storage. It has a constraint that block volume need to be the same AD (availability zone) as VM. In that case the block volume is created in different AD, the pod can't access the block volume
To fix that, we just need to adjust the label to let pod be created in the same AD as block volume.