add PVName as volume

This relates to issue kubernetes-sigs#149 and allows to use the PVName in the path pattern.

README.md

@@ -119,7 +119,7 @@ To disable leader election, define an env variable named ENABLE_LEADER_ELECTION
 | --------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------: |
 | onDelete        | If it exists and has a delete value, delete the directory, if it exists and has a retain value, save the directory.                                                          | will be archived with name on the share: `archived-<volume.Name>` |
 | archiveOnDelete | If it exists and has a false value, delete the directory. if `onDelete` exists, `archiveOnDelete` will be ignored.                                                           | will be archived with name on the share: `archived-<volume.Name>` |
-| pathPattern     | Specifies a template for creating a directory path via PVC metadata's such as labels, annotations, name or namespace. To specify metadata use `${.PVC.<metadata>}`. Example: If folder should be named like `<pvc-namespace>-<pvc-name>`, use `${.PVC.namespace}-${.PVC.name}` as pathPattern. |                               n/a                                |
+| pathPattern     | Specifies a template for creating a directory path via PVC metadata's such as labels, annotations, name or namespace. To specify metadata use `${.PVC.<metadata>}`. Example: If folder should be named like `<pvc-namespace>-<pvc-name>`, use `${.PVC.namespace}-${.PVC.name}` as pathPattern. To use the default name use `${.PVC.namespace}-${.PVC.name}-${.PVC.volume}` as pathPattern. |                               n/a                                |
 
 This is `deploy/class.yaml` which defines the NFS subdir external provisioner's Kubernetes Storage Class:
 

cmd/nfs-subdir-external-provisioner/provisioner.go

@@ -93,6 +93,7 @@ func (p *nfsProvisioner) Provision(ctx context.Context, options controller.Provi
 		data: map[string]string{
 			"name":      pvcName,
 			"namespace": pvcNamespace,
+			"volume":    options.PVName,
 		},
 		labels:      options.PVC.Labels,
 		annotations: options.PVC.Annotations,