Modifying a StorageClass

Kubernetes allows only the allowVolumeExpansion field of a StorageClass to be modified. The modification method is as follows:

1. Run the following command to check whether the StorageClass can be expanded:

   kubectl get sc mysc
   

   If the command output is displayed as the following example, the StorageClass mysc cannot be expanded:

   NAME   PROVISIONER      RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
   mysc   csi.huawei.com   Delete          Immediate           false                  8s
   

2. Run the following command to enable capacity expansion for the StorageClass:

   kubectl patch sc mysc --patch '{"allowVolumeExpansion":true}'
   

3. Check the StorageClass again and ensure that the modification is successful.

   NAME   PROVISIONER      RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
   mysc   csi.huawei.com   Delete          Immediate           true                   8s