K
Q

How do I change the storage class of existing persistent volumes?

4/13/2020

I have a bunch of standard PVs bound to PVCs in Kubernetes running in Google Kubernetes Engine. I want to change their storage class to SSD. How do I achieve that?

-- Souvik Dey
google-kubernetes-engine
kubernetes
persistent-volume-claims
persistent-volumes

Similar Questions

Validatingwebhookconfigurations caBundle value reference from Azure secret mounted in kubernetes
Kubernetes Configure Job To Fail on Certain Exit Codes
Cannot access Load Banalcer IP from Google Cloud Shell after creating GKE Cluster
Istio ServiceEntry ignored in kiali

2 Answers

4/13/2020

No it's not possible to change the storage class of an existing PVC.You will have to create a new PVC with desired storage class and then delete the existing one.

-- Arghya Sadhu
Source: StackOverflow
4/14/2020

If I understood you correctly, you would like to change a type for your PVs, and the question is not "if" but "where".

The relations between PVC, PV and StorageClass is very simple.

PVC is just request for a storage of particular type (specified under storageClassName ) and size (that is listed in PV) .

kind: PersistentVolumeClaim
spec:
...
  resources:
    requests:
      storage: 8Gi
  storageClassName: slow

PV has storageClassName in spec: .

kind: PersistentVolume
...
spec:
  capacity:
    storage: 10Gi
...
  storageClassName: slow

The storageClass has type .

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: slow
provisioner: kubernetes.io/gce-pd
parameters:
  type: pd-standard
  fstype: ext4
  replication-type: none

# type: pd-standard or pd-ssd. Default: pd-standard

Is it the info you've been looking for?

-- Nick
Source: StackOverflow