diff --git a/vendor/github.com/coreos/etcd/etcdmain/util.go b/vendor/github.com/coreos/etcd/etcdmain/util.go
new file mode 100644
index 0000000..9657271
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/etcdmain/util.go
@@ -0,0 +1,65 @@
+// Copyright 2017 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 etcdmain
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/coreos/etcd/pkg/srv"
+	"github.com/coreos/etcd/pkg/transport"
+)
+
+func discoverEndpoints(dns string, ca string, insecure bool) (s srv.SRVClients) {
+	if dns == "" {
+		return s
+	}
+	srvs, err := srv.GetClient("etcd-client", dns)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	endpoints := srvs.Endpoints
+	plog.Infof("discovered the cluster %s from %s", endpoints, dns)
+	if insecure {
+		return *srvs
+	}
+	// confirm TLS connections are good
+	tlsInfo := transport.TLSInfo{
+		TrustedCAFile: ca,
+		ServerName:    dns,
+	}
+	plog.Infof("validating discovered endpoints %v", endpoints)
+	endpoints, err = transport.ValidateSecureEndpoints(tlsInfo, endpoints)
+	if err != nil {
+		plog.Warningf("%v", err)
+	}
+	plog.Infof("using discovered endpoints %v", endpoints)
+
+	// map endpoints back to SRVClients struct with SRV data
+	eps := make(map[string]struct{})
+	for _, ep := range endpoints {
+		eps[ep] = struct{}{}
+	}
+	for i := range srvs.Endpoints {
+		if _, ok := eps[srvs.Endpoints[i]]; !ok {
+			continue
+		}
+		s.Endpoints = append(s.Endpoints, srvs.Endpoints[i])
+		s.SRVs = append(s.SRVs, srvs.SRVs[i])
+	}
+
+	return s
+}