PVC Being Deleted Checks in kubelet

Kubelet must not start pods that use PVCs that are being
deleted.

pkg/volume/util/finalizer.go

@@ -0,0 +1,28 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"k8s.io/api/core/v1"
+)
+
+// IsPVCBeingDeleted returns:
+// true: in case PVC is being deleted, i.e. ObjectMeta.DeletionTimestamp is set
+// false: in case PVC is not being deleted, i.e. ObjectMeta.DeletionTimestamp is nil
+func IsPVCBeingDeleted(pvc *v1.PersistentVolumeClaim) bool {
+	return pvc.ObjectMeta.DeletionTimestamp != nil
+}