Provision a Static Persistent Volume in a TKG Service Cluster

You can statically create a block volume in a TKG Service cluster using an unused persistent volume claim (PVC) from Supervisor.

The PVC must satisfy the following conditions:

• The PVC is present in the same namespace where the TKG cluster resides.
• The PVC is not already attached to a pod in any TKG cluster or to a vSphere Pod in Supervisor.

Using static provisioning, you can also reuse in a new TKG cluster a PVC that is no longer needed by another TKG cluster. To do this, change the Reclaim policy of the persistent volume (PV) in the original TKG cluster to Retain, and then delete the corresponding PVC.

Follow these steps to statically create a PVC in a new TKG cluster using the information from the leftover underlying volume.

Procedure

1. Note the name of the original PVC in the Supervisor.
   If you are reusing the PVC from an old TKG cluster, you can retrieve the PVC name from the volumeHandle of the old PV object in the TKG cluster.
2. Create a PV.
   In the YAML file, specify the values of the following items:
   • For storageClassName, you can enter the storage class name that is used by your PVC in the Supervisor.
   • For volumeHandle, enter the PVC name that you obtained.
   If you are reusing a volume from another TKG cluster, delete the PVC and PV objects from the old TKG cluster before creating a PV in the new TKG cluster.
   Use the following YAML manifest as an example.

   apiVersion: v1
      kind: PersistentVolume
      metadata:
        name: static-tkg-block-pv
        annotations:
          pv.kubernetes.io/provisioned-by: csi.vsphere.vmware.com
      spec:
        storageClassName: gc-storage-profile
        capacity:
          storage: 2Gi
        accessModes:
          - ReadWriteOnce
        persistentVolumeReclaimPolicy: Delete
        claimRef:
          namespace: default
          name: static-tkg-block-pvc
        csi:
          driver: "csi.vsphere.vmware.com"
          volumeAttributes:
            type: "vSphere CNS Block Volume"
          volumeHandle: "supervisor-block-pvc-name"  # Enter the PVC name from the Supervisor.

3. Create a PVC to match the PV object you created.
   Set the storageClassName to the same value as in the PV.

      kind: PersistentVolumeClaim
      apiVersion: v1
      metadata:
        name: static-tkg-block-pvc
      spec:
        accessModes:
          - ReadWriteOnce
        resources:
          requests:
            storage: 2Gi
        storageClassName: gc-storage-profile
        volumeName: static-tkg-block-pv

4. Verify that the PVC is bound to the PV that you created.

   $ kubectl get pv,pvc
    NAME                                    CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                          STORAGECLASS         REASON   AGE
    persistentvolume/static-tkg-block-pv    2Gi        RWO            Delete           Bound    default/static-tkg-block-pvc   gc-storage-profile            10s
   
    NAME                                         STATUS   VOLUME                CAPACITY   ACCESS MODES   STORAGECLASS         AGE
    persistentvolumeclaim/static-tkg-block-pvc   Bound    static-tkg-block-pv   2Gi        RWO            gc-storage-profile   10s