Kubernetes - CrashLoopBackOff ao subir database postgres Google Cloud Platform

Estou recebendo este retorno ao executar os comando no GCP mas utilizando o Minikube localmente a aplicação sobe sem problemas.

kubectl get pods:

statefulset-postgres-0                 0/1       CrashLoopBackOff   6          7m

kubectl logs statefulset-postgres-0

initdb: directory "/var/lib/postgresql/data" exists but is not empty
It contains a lost+found directory, perhaps due to it being a mount point.
Using a mount point directly as the data directory is not recommended.
Create a subdirectory under the mount point.
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.utf8".
The default database encoding has accordingly been set to "UTF8".
The default text search configuration will be set to "english".

Data page checksums are disabled.

kubectl describe pods statefulset-postgres-0

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Events:
  Type     Reason                 Age                From                                                     Message
  ----     ------                 ----               ----                                                     -------
  Normal   Scheduled              13m                default-scheduler                                        Successfully assigned statefulset-postgres-0 to gke-cluster-make4me-default-pool-6c521a68-7bjx
  Normal   SuccessfulMountVolume  13m                kubelet, gke-cluster-make4me-default-pool-6c521a68-7bjx  MountVolume.SetUp succeeded for volume "default-token-clff8"
  Normal   SuccessfulMountVolume  12m                kubelet, gke-cluster-make4me-default-pool-6c521a68-7bjx  MountVolume.SetUp succeeded for volume "pvc-4f2e138b-22f9-11e8-841f-42010a800fdb"
  Normal   Pulled                 12m (x4 over 12m)  kubelet, gke-cluster-make4me-default-pool-6c521a68-7bjx  Container image "postgres:9.6.7" already present on machine
  Normal   Created                12m (x4 over 12m)  kubelet, gke-cluster-make4me-default-pool-6c521a68-7bjx  Created container
  Normal   Started                12m (x4 over 12m)  kubelet, gke-cluster-make4me-default-pool-6c521a68-7bjx  Started container
  Warning  BackOff                12m (x5 over 12m)  kubelet, gke-cluster-make4me-default-pool-6c521a68-7bjx  Back-off restarting failed container
  Warning  FailedSync             2m (x45 over 12m)  kubelet, gke-cluster-make4me-default-pool-6c521a68-7bjx  Error syncing pod

Arquivos de configurações

statefulset.yaml

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: statefulset-postgres
spec:
  serviceName: database
  template:
    metadata:
        labels:
            name: postgress
    spec:
        containers:
          - name: container-postgres
            image: postgres:9.6.7
            ports:
                - containerPort: 5432
            env:
                - name: POSTGRES_USER
                  value: postgres
                - name: POSTGRES_PASSWORD
                  value: XXXXXXXXXXXx
            volumeMounts:
                - name: volume-postgres
                  mountPath: /var/lib/postgresql/data
        volumes:
            - name: volume-postgres
              persistentVolumeClaim:
                  claimName: config-postgres

database-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: database-service
spec:
  type: ClusterIP
  ports:
    - port: 5432
  selector:
    name: postgress