I'm using minikube to run kubernetes locally. My local k8s have two pods which one of them is PostgreSQL and another one is my own app. I've mounted a PersistentVolume and PersistentVolumeClaim in order to make a stateful pod for PostgreSQL:

kind: PersistentVolume
apiVersion: v1
metadata:
  name: postgres-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/data/psql"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi

Here is PostgreSQL deployment yaml file:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: postgres
spec:
  replicas: 1
  template:
    metadata:
      labels:
        name: postgres
    spec:
      containers:
      - name: postgres
        imagePullPolicy: Never
        image: postgres:9.6
        ports:
        - name: postgres
          containerPort: 5432
        volumeMounts:
        - mountPath: /var/lib/postgresql
          name: postgres-persistent-storage
      volumes:
      - name: postgres-persistent-storage
        persistentVolumeClaim:
          claimName: postgres-pv-claim

The problem is that PostgreSQL service doesn't start and this error occurs when I run its pod:

Error: /var/lib/postgresql/9.6/main is not accessible; please fix the directory permissions (/var/lib/postgresql/9.6/ should be world readable)
No PostgreSQL clusters exist; see "man pg_createcluster" ... (warning).

I've checked inside of PostgreSQL pod and I found that /var/lib/postgresql is empty, just like /data/psql In minikube host. Can anyone help?