change cluster schema (#2026)

* change cluster schema

* change cluster schema

vendor/sigs.k8s.io/kubefed/pkg/controller/util/orphaninganotation.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2019 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/apimachinery/pkg/apis/meta/v1/unstructured"
+
+const (
+	// If this annotation is present on a federated resource, resources in the
+	// member clusters managed by the federated resource should be orphaned.
+	// If the annotation is not present (the default), resources in member
+	// clusters will be deleted before the federated resource is deleted.
+	OrphanManagedResourcesAnnotation = "kubefed.io/orphan"
+	OrphanedManagedResourcesValue    = "true"
+)
+
+// IsOrphaningEnabled checks status of "orphaning enable" (OrphanManagedResources: OrphanedManagedResourceslValue')
+// annotation on a resource.
+func IsOrphaningEnabled(obj *unstructured.Unstructured) bool {
+	annotations := obj.GetAnnotations()
+	if annotations == nil {
+		return false
+	}
+	return annotations[OrphanManagedResourcesAnnotation] == OrphanedManagedResourcesValue
+}
+
+// Enables the orphaning mode
+func EnableOrphaning(obj *unstructured.Unstructured) {
+	annotations := obj.GetAnnotations()
+	if annotations == nil {
+		annotations = make(map[string]string)
+	}
+	annotations[OrphanManagedResourcesAnnotation] = OrphanedManagedResourcesValue
+	obj.SetAnnotations(annotations)
+}
+
+// Disables the orphaning mode
+func DisableOrphaning(obj *unstructured.Unstructured) {
+	annotations := obj.GetAnnotations()
+	if annotations == nil {
+		return
+	}
+	delete(annotations, OrphanManagedResourcesAnnotation)
+	obj.SetAnnotations(annotations)
+}