[feature request] CSI SMB Volume Expansion

[san360]

Tried to expand allocated PVC by editing capacity:

Update the PVC and underlying PV:

Create a PVC via YAML and redeploy the PVC after updating the capacity:

Environment:

• CSI Driver version: 1.20
• Kubernetes version (use kubectl version): 1.20
• OS (e.g. from /etc/os-release): Linux, Ubuntu

[andyzhangx]

it's not supported yet, implement a dummy volume expansion may solve this issue. This SMB driver actually does not manage volume capacity actually, does a dummy volume expansion work for you?

[gavin-ellis]

What steps can be taken to expand the volume?
Is the spec.storage.capacity value not enforced?
Does increasing the capacity in the PVC work?

[andyzhangx]

What steps can be taken to expand the volume? Is the spec.storage.capacity value not enforced? Does increasing the capacity in the PVC work?

@gavin-ellis it's not supported

[winromulus]

@andyzhangx what do you mean by a dummy expansion and how would that be achieved?

[andyzhangx]

@andyzhangx what do you mean by a dummy expansion and how would that be achieved?

@andyzhangx this driver could not expand the real volume size, if you input a larger volume size, this driver would just return success, that's called dummy expansion, not sure whether it's reasonable for such behavior.

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@k8s-triage-robot: Closing this issue.

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[joymon]

Does this mean if I give 100 Gi capacity in PV and 10Gi PVC storage, I can store more than that if the underlying SMB server has storage?
Below is the way we are giving the storage size.
storage: 100Gi

Is this setting required to use the driver or just leave it empty to have all the storage on SMB server be used?

[andyzhangx]

Does this mean if I give 100 Gi capacity in PV and 10Gi PVC storage, I can store more than that if the underlying SMB server has storage? Below is the way we are giving the storage size. storage: 100Gi

Is this setting required to use the driver or just leave it empty to have all the storage on SMB server be used?

@joymon the pvc capacity does not enforce the actual data size, it's only for pv/pvc matching.

[andyzhangx]

fixed by #881