I am new to kubernetes and stuff. I was going through the tutorials, I encountered a error while using the pstgres database and persistent volume claim. I am pretty sure that all the permissions are being given to the user but still the error suggest that the folder has wrong ownership.

Here are my configuration files

This is the persistent volume claim file

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: database-persistent-volume-claim
spec:
  accessModes: 
    - ReadWriteOnce
  resources:
    requests:
      storage: 2Gi

Here is my postgres deployment file

apiVersion: apps/v1
kind: Deployment
metadata: 
  name: postgres-deployment
spec:
  replicas: 1
  selector:
    matchLabels: 
      component: postgres
  template: 
     metadata:
       labels:
         component: postgres
     spec:
       volumes:
        - name: postgres-storage
          persistentVolumeClaim:
            claimName: database-persistent-volume-claim
       containers:
         - name: postgres
           image: postgres
           ports:
             - containerPort: 5432
           volumeMounts:
             - name: postgres-storage
               mountPath: /var/lib/postgresql/data
               subPath: postgres
           env:
             - name: POSTGRES_HOST_AUTH_METHOD
               value: "trust"
             - name: PGPASSWORD
               valueFrom:
                 secretKeyRef:
                   name: pgpassword
                   key: PGPASSWORD

Here is the error message 
2020-04-12 01:57:11.986 UTC [82] FATAL:  data directory "/var/lib/postgresql/data" has wrong ownership
2020-04-12 01:57:11.986 UTC [82] HINT:  The server must be started by the user that owns the data directory.
child process exited with exit code 1
initdb: removing contents of data directory "/var/lib/postgresql/data"

Any help is appreciated?