NFS PV mountOptions does not work when Volume SubPath option is set

[skanakal]

What happened?

Setting the Volume subpath option at deployment with an NFS PV with a mount option (e.g. nosuid) does not mount accordingly. If no SubPath is set and the NFS PV is set to the /nfs_share/directory the mount works with the nosuid.

What did you expect to happen?

should be mounted with correct mountoptions

How can we reproduce it (as minimally and precisely as possible)?

• create KIND cluster and install nfs client packages
• create a PV and PVC with below options:

spec:
  accessModes:
    - ReadWriteOnce
    - ReadOnlyMany
    - ReadWriteMany
  capacity:
    storage: 10Gi
  claimRef:
    apiVersion: v1
    kind: PersistentVolumeClaim
    name: pvc01
    namespace: default
    resourceVersion: '53505'
    uid: 0b3736ac-bbb6-4539-95c1-854ddcb36114
  mountOptions:
    - nfsvers=4.2
    - sec=sys
    - nosuid
  nfs:
    path: /nfs
    server: 172.31.40.82
  persistentVolumeReclaimPolicy: Retain
  volumeMode: Filesystem  

• Update the deployment with the volume and mount information:

          volumeMounts:
            - mountPath: /data
              name: vol-oirnd
              subPath: share01

      volumes:
        - name: vol-oirnd
          persistentVolumeClaim:
            claimName: pvc01
          __newPvc:
            type: persistentvolumeclaim
            metadata:
              namespace: default
            spec:
              storageClassName: ''
              volumeName: ''
              resources:
                requests: {} 

Anything else we need to know?

**Not using SubPath**

root@kind-2-control-plane:/# mount | grep nfs
192.168.100.217:/nfs on /var/lib/kubelet/pods/c29b33d8-3709-4082-892c-def5efbba86f/volumes/kubernetes.io~nfs/pv type nfs4 (rw,nosuid,relatime,vers=4.2,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.18.0.2,local_lock=none,addr=192.168.100.217)

**When not using SubPath**


192.168.100.217:/nfs/hello/world on /var/lib/kubelet/pods/c29b33d8-3709-4082-892c-def5efbba86f/volume-subpaths/pv/httpd/0 type nfs4 (rw,relatime,vers=4.2,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.18.0.2,local_lock=none,addr=192.168.100.217)
root@kind-2-control-plane:/# 

root@kind-2-control-plane:/# kubectl get nodes
NAME                   STATUS   ROLES           AGE   VERSION
kind-2-control-plane   Ready    control-plane   49m   v1.29.2
root@kind-2-control-plane:/# 

Kubernetes version

$ kubectl version
 v1.29.2

Cloud provider

OS version

# On Linux:
$ cat /etc/os-release
# paste output here
$ uname -a
Ubuntu

# On Windows:
C:\> wmic os get Caption, Version, BuildNumber, OSArchitecture
# paste output here

Install tools

Container runtime (CRI) and version (if applicable)

Related plugins (CNI, CSI, ...) and versions (if applicable)

[carlory]

/sig storage

[xing-yang]

/triage accepted