change cluster schema (#2026)

* change cluster schema

* change cluster schema

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

@@ -0,0 +1,69 @@
+/*
+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 (
+	ManagedByKubeFedLabelKey     = "kubefed.io/managed"
+	ManagedByKubeFedLabelValue   = "true"
+	UnmanagedByKubeFedLabelValue = "false"
+)
+
+// HasManagedLabel indicates whether the given object has the managed
+// label.
+func HasManagedLabel(obj *unstructured.Unstructured) bool {
+	labels := obj.GetLabels()
+	if labels == nil {
+		return false
+	}
+	return labels[ManagedByKubeFedLabelKey] == ManagedByKubeFedLabelValue
+}
+
+// IsExplicitlyUnmanaged indicates whether the given object has the managed
+// label with value false.
+func IsExplicitlyUnmanaged(obj *unstructured.Unstructured) bool {
+	labels := obj.GetLabels()
+	if labels == nil {
+		return false
+	}
+	return labels[ManagedByKubeFedLabelKey] == UnmanagedByKubeFedLabelValue
+}
+
+// AddManagedLabel ensures that the given object has the managed
+// label.
+func AddManagedLabel(obj *unstructured.Unstructured) {
+	labels := obj.GetLabels()
+	if labels == nil {
+		labels = make(map[string]string)
+	}
+	labels[ManagedByKubeFedLabelKey] = ManagedByKubeFedLabelValue
+	obj.SetLabels(labels)
+}
+
+// RemoveManagedLabel ensures that the given object does not have the
+// managed label.
+func RemoveManagedLabel(obj *unstructured.Unstructured) {
+	labels := obj.GetLabels()
+	if labels == nil || labels[ManagedByKubeFedLabelKey] != ManagedByKubeFedLabelValue {
+		return
+	}
+	delete(labels, ManagedByKubeFedLabelKey)
+	obj.SetLabels(labels)
+}