Update status on PVC when allowVolumeExpansion true?

[Steven Miller]

Summary

For our use case, we are testing a stateful workload in kubernetes-in-docker, which uses this storage provisioner.

We do not need the enforcement of requests, but it would be nice to be able to update the status field of the pvc.

I would like to suggest the local path provisioner to update the status field, despite nothing actually happening to increase the volume size.

Reproduce

 kind create cluster

Creating cluster "kind" ...
 ✓ Ensuring node image (kindest/node:v1.25.3) 🖼

 kubectl patch storageclass standard -p '{"allowVolumeExpansion": true}'

storageclass.storage.k8s.io/standard patched

apply this

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-pvc-claim
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
---

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
  - name: ubuntu
    image: ubuntu
    command: ["/bin/sleep"]
    args: ["3000"]
    volumeMounts:
      - name: my-pvc
        mountPath: /data
  volumes:
    - name: my-pvc
      persistentVolumeClaim:
        claimName: my-pvc-claim

check pvc

k get pvc
NAME           STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
my-pvc-claim   Bound    pvc-3bd61984-4b64-4543-93b6-58dbaec5827e   1Gi        RWO            standard       38s

Then delete the pod:

kubectl delete pods --all

Increase pvc request to 2Gi, recreate pod. Check on pvc:

  spec:
    accessModes:
    - ReadWriteOnce
    resources:
      requests:
        storage: 2Gi
    storageClassName: standard
    volumeMode: Filesystem
    volumeName: pvc-3bd61984-4b64-4543-93b6-58dbaec5827e
  status:
    accessModes:
    - ReadWriteOnce
    capacity:
      storage: 1Gi
    phase: Bound
    

[thoot-235]

+1

[Steven Miller]

I no longer care about this issue