diff --git a/vendor/go.etcd.io/etcd/etcdserver/api/membership/metrics.go b/vendor/go.etcd.io/etcd/etcdserver/api/membership/metrics.go
new file mode 100644
index 0000000..b3212bc
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/etcdserver/api/membership/metrics.go
@@ -0,0 +1,31 @@
+// Copyright 2018 The etcd 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 membership
+
+import "github.com/prometheus/client_golang/prometheus"
+
+var (
+	ClusterVersionMetrics = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: "etcd",
+		Subsystem: "cluster",
+		Name:      "version",
+		Help:      "Which version is running. 1 for 'cluster_version' label with current cluster version",
+	},
+		[]string{"cluster_version"})
+)
+
+func init() {
+	prometheus.MustRegister(ClusterVersionMetrics)
+}