Persistent Volumes

Claiming Volumes

Here is how to claim RBD volumes for use within a deployment.

1. Create a file claim.json spevifying the volume name and size:

   {
     "kind": "PersistentVolumeClaim",
     "apiVersion": "v1",
     "metadata": {
        "name": "myvol"
     },
     "spec": {
         "accessModes": [
             "ReadWriteOnce"
         ],
         "resources": {
             "requests": {
                "storage": "4Gi"
             }
         },
         "storageClassName": "hdd"
      }
   }
   

   Note the StorageClassName parameter which for our platform is “hdd”.

2. Execute the command:

   $ kubectl create -f claim.json
   

3. Check that the 4GB volume “myvol” has been created:

   $ kubectl get pvc
   NAME       STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
   myvol      Bound     pvc-81c512af-91a9-11e8-b43d-74e6e266c8e1   4Gi        RWO            slow           17s
   

Deleting a Volume

Use this to delete a volume:

$ kubectl delete pvc myvol
persistentvolumeclaim "myvol" deleted