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@modern-television-79263 Forgot to say, I am trying offline volume expansion. The volume is not mounted on any pod. From all the docs I’ve seen, offline expansion is supported on 6.7, while online is only supported on 7+

Ah! Then I’m out of ideas. :(

Have you checked the CSI pod logs?

Yes, can’t find anything unusal, no errors, no warnings.

Is this PV mounted to a Windows node?

No, all nodes are Ubuntu 20.04 LTS

So I assume you're trying to expand it by directly modifying the PVC object with a new size?

Yes, exactly

I assume you're doing something like

kubectl patch pvc test2 -p '{"spec": {"resources": {"requests": {"storage": "6Gi"}}}}'

or similar?

Yes, that’s exactly how I’m doing it

can you do a kubectl get pv <name> -o yaml, please?

Here it is

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pvc-9db54cee-126d-4123-b835-8747bc266692
  uid: 60fc2638-abd9-4201-9ec2-0f8e91f1b6d1
  resourceVersion: '249642158'
  creationTimestamp: '2022-06-22T08:42:51Z'
  annotations:
    <http://pv.kubernetes.io/provisioned-by|pv.kubernetes.io/provisioned-by>: <http://csi.vsphere.vmware.com|csi.vsphere.vmware.com>
  finalizers:
    - <http://kubernetes.io/pv-protection|kubernetes.io/pv-protection>
    - external-attacher/csi-vsphere-vmware-com
status:
  phase: Bound
spec:
  capacity:
    storage: 5Gi
  csi:
    driver: <http://csi.vsphere.vmware.com|csi.vsphere.vmware.com>
    volumeHandle: f327a6e2-42e2-423c-bc18-2c1c3bbca11c
    fsType: ext4
    volumeAttributes:
      <http://storage.kubernetes.io/csiProvisionerIdentity|storage.kubernetes.io/csiProvisionerIdentity>: <http://1655887279217-8081-csi.vsphere.vmware.com|1655887279217-8081-csi.vsphere.vmware.com>
      type: vSphere CNS Block Volume
  accessModes:
    - ReadWriteOnce
  claimRef:
    kind: PersistentVolumeClaim
    namespace: test
    name: test2
    uid: 9db54cee-126d-4123-b835-8747bc266692
    apiVersion: v1
    resourceVersion: '249639843'
  persistentVolumeReclaimPolicy: Retain
  storageClassName: vsphere
  volumeMode: Filesystem

Hmm, and the PV isn't bound to anything at the moment?

If by bound you mean mounted on a pod, no, it’s not

Interesting, that's all you need from what I've gathered from the docs. Does a resizer pod spin up when you try and expand the volume?

No, it doesn’t. Wasn’t even aware of such a thing 😅

That might be specific to 7.0 tbh

Ok, I figured out the issue. I needed to set

csiController.csiResizer.enabled=true

on the CSI Helm chart, default is disabled and missed the setting on first installed.

And you reran the expansion and it works?

Yeah, didn’t even have to reran it, after the resizer was enabled it picked the PVC as needing to resize and resized it.

I provided no help, you sorted it all out by yourself 😄

Good news all around. :)