[BUG]: Unable to mount ReadOnlyMany PVC using CSI driver for PowerFlex

rishabhatdell commented 1 week ago

Bug Description

Unable to mount ReadOnlyMany PVC using CSI-PowerFlex

Error message

time="2024-10-21T09:51:06Z" level=info msg="mount command" args="-t ext4 -o ro /dev/scinib /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/2b6e15c75b2ff90f-7ed828f900000025" cmd=mount
time="2024-10-21T09:51:06Z" level=error msg="mount Failed" args="-t ext4 -o ro /dev/scinib /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/2b6e15c75b2ff90f-7ed828f900000025" cmd=mount error="exit status 32" output="mount: /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/2b6e15c75b2ff90f-7ed828f900000025: wrong fs type, bad option, bad superblock on /dev/scinib, missing codepage or helper program, or other error.\n"

Logs

time="2024-11-04T11:07:43Z" level=info msg="attempting mount to private area" CSIRequestID=31 device=/dev/scinia id=6689fba68522eb0f-7840b2f70000001f privateMount=/var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f target="/var/lib/kubelet/pods/1e913e9d-6a8b-495d-8337-130b59a76d97/volumes/kubernetes.io~csi/k8s-891444da0e/mount" volumePath=/dev/scinia
time="2024-11-04T11:07:43Z" level=warning msg="Unable to check stat of file: /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f with error: stat /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f: no such file or directory"
time="2024-11-04T11:07:43Z" level=debug msg="created directory" path=/var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f
time="2024-11-04T11:07:43Z" level=info msg="mount command" args="-t ext4 -o ro /dev/scinia /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f" cmd=mount
time="2024-11-04T11:07:43Z" level=error msg="mount Failed" args="-t ext4 -o ro /dev/scinia /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f" cmd=mount error="exit status 32" output="mount: /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f: wrong fs type, bad option, bad superblock on /dev/scinia, missing codepage or helper program, or other error.\n"
time="2024-11-04T11:07:43Z" level=info msg="Cleaning up private target" CSIRequestID=31 privTgt=/var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f
time="2024-11-04T11:07:43Z" level=info msg="/csi.v1.Node/NodePublishVolume: REP 0031: rpc error: code = Internal desc = error performing private mount: mount failed: exit status 32"
time="2024-11-04T11:07:43Z" level=info msg="mounting arguments: -t ext4 -o ro /dev/scinia /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f"
time="2024-11-04T11:07:43Z" level=info msg="output: mount: /var/lib/kubelet/plugins/vxflexos.emc.dell.com/disks/6689fba68522eb0f-7840b2f70000001f: wrong fs type, bad option, bad superblock on /dev/scinia, missing codepage or helper program, or other error."

Screenshots

No response

Additional Environment Information

No response

Steps to Reproduce

Create Storage Class

Create ReadOnlyMany PVC

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: pvol
spec:
accessModes:
  - ReadOnlyMany
volumeMode: Filesystem
resources:
    requests:
        storage: 3Gi
storageClassName: vxflexos

Create Pod to Consume PVC

apiVersion: v1
kind: Pod
metadata:
name: test-pod
spec:
containers:
  - name: test
    image: docker.io/centos:latest
    command: [ "/bin/sleep", "3600" ]
    volumeMounts:
      - mountPath: "/data0"
        name: pvol
volumes:
  - name: pvol
    persistentVolumeClaim:
        claimName: pvol

Expected Behavior

Volume should successfully mount to pod and pod should be running state

CSM Driver(s)

CSI-PowerFlex

Installation Type

Helm/Operator

Container Storage Modules Enabled

No response

Container Orchestrator

OCP/K8s

Operating System

RHEL

rishabhatdell commented 1 week ago

link: 29684

rishabhatdell commented 4 days ago

Closing this issue because its expected for driver not to mount an empty read-only volume because ReadOnlyMany is intended for volumes with pre-existing data. It only makes sense to read from a volume containing data, so creating an empty read-only volume would simply waste storage space.

shanmydell commented 4 days ago

Clearing milestone as this is expected behavior and no-change to the code

dell / csm