change cluster schema (#2026)

* change cluster schema

* change cluster schema

vendor/sigs.k8s.io/kubefed/pkg/kubefedctl/util/yaml_writer.go

@@ -0,0 +1,50 @@
+/*
+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 (
+	"io"
+
+	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+)
+
+func WriteUnstructuredToYaml(unstructuredObj *unstructured.Unstructured, w io.Writer) error {
+	// If status is included in the yaml, attempting to create it in a
+	// kube API will cause an error.
+	obj := unstructuredObj.DeepCopy()
+	unstructured.RemoveNestedField(obj.Object, "status")
+	unstructured.RemoveNestedField(obj.Object, "metadata", "creationTimestamp")
+
+	errMsg := "Error encoding unstructured object to yaml"
+	objJSON, err := obj.MarshalJSON()
+	if err != nil {
+		return errors.Wrap(err, errMsg)
+	}
+
+	data, err := yaml.JSONToYAML(objJSON)
+	if err != nil {
+		return errors.Wrap(err, errMsg)
+	}
+	_, err = w.Write(data)
+	if err != nil {
+		return errors.Wrap(err, errMsg)
+	}
+	return nil
+}