persistent_volume_migration.md

1. create a new PersistentVolumeClaim
2. create migration Pod

---
apiVersion: v1
kind: Pod
metadata:
  name: migrate
spec:
  containers:
    - name: migrate
      image: centos:7
      volumeMounts:
        - name: from
          mountPath: /from
        - name: to
          mountPath: /to
      command:
        - sleep
        - 2h
  volumes:
    - name: from
      persistentVolumeClaim:
        claimName: <PERSISTENT_VOLUME_MIGRATE_FROM>
    - name: to
      persistentVolumeClaim:
        claimName: <PERSISTENT_VOLUME_MIGRATE_TO>

3. kubectl exec migrate -- cp -r /from /to
4. delete migration Pod
5. configure your Deployment to use new PersistentVolumeClaim
6. check new Deployment is running successfully
7. delete old PersistentVolumeClaim