Add PV util for extracting referenced secrets

pkg/api/persistentvolume/util.go

@@ -0,0 +1,55 @@
+/*
+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 persistentvolume
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+)
+
+// VisitPVSecretNames invokes the visitor function with the name of every secret
+// referenced by the PV spec. If visitor returns false, visiting is short-circuited.
+// Returns true if visiting completed, false if visiting was short-circuited.
+func VisitPVSecretNames(pv *api.PersistentVolume, visitor func(string) bool) bool {
+	source := &pv.Spec.PersistentVolumeSource
+	switch {
+	case source.AzureFile != nil:
+		if len(source.AzureFile.SecretName) > 0 && !visitor(source.AzureFile.SecretName) {
+			return false
+		}
+	case source.CephFS != nil:
+		if source.CephFS.SecretRef != nil && !visitor(source.CephFS.SecretRef.Name) {
+			return false
+		}
+	case source.FlexVolume != nil:
+		if source.FlexVolume.SecretRef != nil && !visitor(source.FlexVolume.SecretRef.Name) {
+			return false
+		}
+	case source.RBD != nil:
+		if source.RBD.SecretRef != nil && !visitor(source.RBD.SecretRef.Name) {
+			return false
+		}
+	case source.ScaleIO != nil:
+		if source.ScaleIO.SecretRef != nil && !visitor(source.ScaleIO.SecretRef.Name) {
+			return false
+		}
+	case source.ISCSI != nil:
+		if source.ISCSI.SecretRef != nil && !visitor(source.ISCSI.SecretRef.Name) {
+			return false
+		}
+	}
+	return true
+}