apply workaround for kubernetes/kubernetes#44737

README.md

@@ -40,3 +40,7 @@ this may be overridden via the kubelet `--hostname-override` parameter
 `example.yaml`, located in the root of this project, contains an example
 configuration that attaches a resource named `r0` to the container under the path
 `/data`
+
+Please note that the physical volume name and the resource name associated
+**must** match in order for the volume to be detached from the kublet due to
+https://github.com/kubernetes/kubernetes/issues/44737

example.yaml

@@ -7,12 +7,12 @@ spec:
     command: [/bin/bash]
     args: ["-c", "while true; do sleep 10; done"]
     volumeMounts:
-    - name: test
+    - name: r0
       mountPath: /data
     ports:
     - containerPort: 80
   volumes:
-  - name: test
+  - name: r0
     flexVolume:
       driver: "linbit/drbd"
       fsType: "ext4"

pkg/api/api.go

@@ -83,7 +83,7 @@ func (api FlexVolumeApi) Call(s []string) (string, int) {
 	if len(s) < 1 {
 		res, _ := json.Marshal(response{
 			Status:  "Failure",
-			Message: "No driver action! Valid actions are: init, attach, detach, mountdevice, unmountdevice, getvolumename, isattached",
+			Message: "No driver action! Valid actions are: init, attach, detach, mountdevice, unmountdevice, isattached",
 		})
 		return string(res), EXITBADAPICALL
 	}
@@ -102,8 +102,6 @@ func (api FlexVolumeApi) Call(s []string) (string, int) {
 		return api.unmountDevice(s)
 	case "unmount":
 		return api.unmount(s)
-	case "getvolumename":
-		return api.getVolumeName(s)
 	case "isattached":
 		return api.isAttached(s)
 	default: