[cinder-csi-plugin] Tag volume with optional metadata

the external-csi provisioner optionally injects metadata in the CreateVolume that we now preserve as tags on the volume.

kubernetes-csi/external-provisioner#399

pkg/csi/cinder/controllerserver.go

@@ -103,6 +103,14 @@ func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
 
 	// Volume Create
 	properties := map[string]string{"cinder.csi.openstack.org/cluster": cs.Driver.cluster}
+	//Tag volume with metadata if present: https://github.com/kubernetes-csi/external-provisioner/pull/399
+	for k, v := range req.Parameters {
+		for _, mKey := range []string{"csi.storage.k8s.io/pvc/name", "csi.storage.k8s.io/pvc/namespace", "csi.storage.k8s.io/pv/name"} {
+			if k == mKey {
+				properties[k] = v
+			}
+		}
+	}
 	content := req.GetVolumeContentSource()
 	var snapshotID string
 	var sourcevolID string