I have it running last Docker version under Kubernetes with NFS as a Persistence Volume. 

The problem becomes when OpenProject mounts the pgdata over already mounted NFS (PVC) /var/openproject

I can see the content of the /var/openproject/pgdata inside the running container but not in the NFS server.

I tried to give full permissions but nothing helped.

My NFS server config (/etc/exports): 

/mnt/storage/openproject 10.10.0.0/24(nohide,rw,sync,no_wdelay,subtree_check)

Otherwiser when I do a "touch /var/openproject/hello.txt" in the Openproject running container the file is save to the NFS Server without problem.

The issue is arround the "/var/openproject/pgdata"

Using "devel" as namespace my yaml:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: openproject
  labels:
    name: openproject
  namespace: devel
spec:
  replicas: 1
  selector:
    matchLabels:
      name: openproject
  template:
    metadata:
      name: openproject
      labels:
        name: openproject
    spec:
      containers:
      - name: openproject
        image: openproject/community:latest
        - name: SECRET_KEY_BASE
          value: "mysecret"
        ports:
        - containerPort: 8080
          name: http
          protocol: TCP
        volumeMounts:
        - name: openproject-data
          mountPath: /var/openproject
      volumes:
      - name: openproject-data
        persistentVolumeClaim:
          claimName: openproject-pvc
---
apiVersion: v1
kind: Service
metadata:
  namespace: devel
  name: openproject
  labels:
    run: openproject
spec:
  ports:
  - name: openproject
    protocol: TCP
    port: 8080
    targetPort: 8080
  selector:
    name: openproject
       
---
kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
  name: openproject
  namespace: devel
spec:
  rules:
  - host: op.mysite.com
    http:
      paths:
      - path: /
        backend:
          serviceName: openproject
          servicePort: 8080

Any idea how to solve it?