5.4. Expanding persistent volume claims (PVCs) with a file system

Procedure

1. Edit the PVC and request a new size by editing spec.resources.requests. For example, the following expands the ebs PVC to 8 Gi.

   kind: PersistentVolumeClaim
   apiVersion: v1
   metadata:
     name: ebs
   spec:
     storageClass: "storageClassWithFlagSet"
     accessModes:
       - ReadWriteOnce
     resources:
       requests:
         storage: 8Gi 

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   Updating spec.resources.requests to a larger amount will expand the PVC.

2. After the cloud provider object has finished resizing, the PVC is set to FileSystemResizePending. Check the condition by entering the following command:

   $ oc describe pvc <pvc_name>

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3. When the cloud provider object has finished resizing, the PersistentVolume object reflects the newly requested size in PersistentVolume.Spec.Capacity. At this point, you can create or recreate a new pod from the PVC to finish the file system resizing. Once the pod is running, the newly requested size is available and the FileSystemResizePending condition is removed from the PVC.