vendor: Update vendor logic

vendor/k8s.io/apiserver/pkg/storage/etcd3/healthcheck.go

@@ -0,0 +1,40 @@
+/*
+Copyright 2015 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 etcd3
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// etcdHealth encodes data returned from etcd /healthz handler.
+type etcdHealth struct {
+	// Note this has to be public so the json library can modify it.
+	Health string `json:"health"`
+}
+
+// EtcdHealthCheck decodes data returned from etcd /healthz handler.
+func EtcdHealthCheck(data []byte) error {
+	obj := etcdHealth{}
+	if err := json.Unmarshal(data, &obj); err != nil {
+		return err
+	}
+	if obj.Health != "true" {
+		return fmt.Errorf("Unhealthy status: %s", obj.Health)
+	}
+	return nil
+}