diff --git a/vendor/github.com/coreos/etcd/etcdmain/etcd.go b/vendor/github.com/coreos/etcd/etcdmain/etcd.go
new file mode 100644
index 0000000..87e9b25
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/etcdmain/etcd.go
@@ -0,0 +1,399 @@
+// Copyright 2015 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 (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path/filepath"
+	"reflect"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/coreos/etcd/discovery"
+	"github.com/coreos/etcd/embed"
+	"github.com/coreos/etcd/etcdserver"
+	"github.com/coreos/etcd/etcdserver/api/etcdhttp"
+	"github.com/coreos/etcd/pkg/cors"
+	"github.com/coreos/etcd/pkg/fileutil"
+	pkgioutil "github.com/coreos/etcd/pkg/ioutil"
+	"github.com/coreos/etcd/pkg/osutil"
+	"github.com/coreos/etcd/pkg/transport"
+	"github.com/coreos/etcd/pkg/types"
+	"github.com/coreos/etcd/proxy/httpproxy"
+	"github.com/coreos/etcd/version"
+
+	"github.com/coreos/pkg/capnslog"
+	"google.golang.org/grpc"
+)
+
+type dirType string
+
+var plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "etcdmain")
+
+var (
+	dirMember = dirType("member")
+	dirProxy  = dirType("proxy")
+	dirEmpty  = dirType("empty")
+)
+
+func startEtcdOrProxyV2() {
+	grpc.EnableTracing = false
+
+	cfg := newConfig()
+	defaultInitialCluster := cfg.ec.InitialCluster
+
+	err := cfg.parse(os.Args[1:])
+	if err != nil {
+		plog.Errorf("error verifying flags, %v. See 'etcd --help'.", err)
+		switch err {
+		case embed.ErrUnsetAdvertiseClientURLsFlag:
+			plog.Errorf("When listening on specific address(es), this etcd process must advertise accessible url(s) to each connected client.")
+		}
+		os.Exit(1)
+	}
+	cfg.ec.SetupLogging()
+
+	var stopped <-chan struct{}
+	var errc <-chan error
+
+	plog.Infof("etcd Version: %s\n", version.Version)
+	plog.Infof("Git SHA: %s\n", version.GitSHA)
+	plog.Infof("Go Version: %s\n", runtime.Version())
+	plog.Infof("Go OS/Arch: %s/%s\n", runtime.GOOS, runtime.GOARCH)
+
+	GoMaxProcs := runtime.GOMAXPROCS(0)
+	plog.Infof("setting maximum number of CPUs to %d, total number of available CPUs is %d", GoMaxProcs, runtime.NumCPU())
+
+	defaultHost, dhErr := (&cfg.ec).UpdateDefaultClusterFromName(defaultInitialCluster)
+	if defaultHost != "" {
+		plog.Infof("advertising using detected default host %q", defaultHost)
+	}
+	if dhErr != nil {
+		plog.Noticef("failed to detect default host (%v)", dhErr)
+	}
+
+	if cfg.ec.Dir == "" {
+		cfg.ec.Dir = fmt.Sprintf("%v.etcd", cfg.ec.Name)
+		plog.Warningf("no data-dir provided, using default data-dir ./%s", cfg.ec.Dir)
+	}
+
+	which := identifyDataDirOrDie(cfg.ec.Dir)
+	if which != dirEmpty {
+		plog.Noticef("the server is already initialized as %v before, starting as etcd %v...", which, which)
+		switch which {
+		case dirMember:
+			stopped, errc, err = startEtcd(&cfg.ec)
+		case dirProxy:
+			err = startProxy(cfg)
+		default:
+			plog.Panicf("unhandled dir type %v", which)
+		}
+	} else {
+		shouldProxy := cfg.isProxy()
+		if !shouldProxy {
+			stopped, errc, err = startEtcd(&cfg.ec)
+			if derr, ok := err.(*etcdserver.DiscoveryError); ok && derr.Err == discovery.ErrFullCluster {
+				if cfg.shouldFallbackToProxy() {
+					plog.Noticef("discovery cluster full, falling back to %s", fallbackFlagProxy)
+					shouldProxy = true
+				}
+			}
+		}
+		if shouldProxy {
+			err = startProxy(cfg)
+		}
+	}
+
+	if err != nil {
+		if derr, ok := err.(*etcdserver.DiscoveryError); ok {
+			switch derr.Err {
+			case discovery.ErrDuplicateID:
+				plog.Errorf("member %q has previously registered with discovery service token (%s).", cfg.ec.Name, cfg.ec.Durl)
+				plog.Errorf("But etcd could not find valid cluster configuration in the given data dir (%s).", cfg.ec.Dir)
+				plog.Infof("Please check the given data dir path if the previous bootstrap succeeded")
+				plog.Infof("or use a new discovery token if the previous bootstrap failed.")
+			case discovery.ErrDuplicateName:
+				plog.Errorf("member with duplicated name has registered with discovery service token(%s).", cfg.ec.Durl)
+				plog.Errorf("please check (cURL) the discovery token for more information.")
+				plog.Errorf("please do not reuse the discovery token and generate a new one to bootstrap the cluster.")
+			default:
+				plog.Errorf("%v", err)
+				plog.Infof("discovery token %s was used, but failed to bootstrap the cluster.", cfg.ec.Durl)
+				plog.Infof("please generate a new discovery token and try to bootstrap again.")
+			}
+			os.Exit(1)
+		}
+
+		if strings.Contains(err.Error(), "include") && strings.Contains(err.Error(), "--initial-cluster") {
+			plog.Infof("%v", err)
+			if cfg.ec.InitialCluster == cfg.ec.InitialClusterFromName(cfg.ec.Name) {
+				plog.Infof("forgot to set --initial-cluster flag?")
+			}
+			if types.URLs(cfg.ec.APUrls).String() == embed.DefaultInitialAdvertisePeerURLs {
+				plog.Infof("forgot to set --initial-advertise-peer-urls flag?")
+			}
+			if cfg.ec.InitialCluster == cfg.ec.InitialClusterFromName(cfg.ec.Name) && len(cfg.ec.Durl) == 0 {
+				plog.Infof("if you want to use discovery service, please set --discovery flag.")
+			}
+			os.Exit(1)
+		}
+		plog.Fatalf("%v", err)
+	}
+
+	osutil.HandleInterrupts()
+
+	// At this point, the initialization of etcd is done.
+	// The listeners are listening on the TCP ports and ready
+	// for accepting connections. The etcd instance should be
+	// joined with the cluster and ready to serve incoming
+	// connections.
+	notifySystemd()
+
+	select {
+	case lerr := <-errc:
+		// fatal out on listener errors
+		plog.Fatal(lerr)
+	case <-stopped:
+	}
+
+	osutil.Exit(0)
+}
+
+// startEtcd runs StartEtcd in addition to hooks needed for standalone etcd.
+func startEtcd(cfg *embed.Config) (<-chan struct{}, <-chan error, error) {
+	e, err := embed.StartEtcd(cfg)
+	if err != nil {
+		return nil, nil, err
+	}
+	osutil.RegisterInterruptHandler(e.Close)
+	select {
+	case <-e.Server.ReadyNotify(): // wait for e.Server to join the cluster
+	case <-e.Server.StopNotify(): // publish aborted from 'ErrStopped'
+	}
+	return e.Server.StopNotify(), e.Err(), nil
+}
+
+// startProxy launches an HTTP proxy for client communication which proxies to other etcd nodes.
+func startProxy(cfg *config) error {
+	plog.Notice("proxy: this proxy supports v2 API only!")
+
+	clientTLSInfo := cfg.ec.ClientTLSInfo
+	if clientTLSInfo.Empty() {
+		// Support old proxy behavior of defaulting to PeerTLSInfo
+		// for both client and peer connections.
+		clientTLSInfo = cfg.ec.PeerTLSInfo
+	}
+	clientTLSInfo.InsecureSkipVerify = cfg.ec.ClientAutoTLS
+	cfg.ec.PeerTLSInfo.InsecureSkipVerify = cfg.ec.PeerAutoTLS
+
+	pt, err := transport.NewTimeoutTransport(clientTLSInfo, time.Duration(cfg.cp.ProxyDialTimeoutMs)*time.Millisecond, time.Duration(cfg.cp.ProxyReadTimeoutMs)*time.Millisecond, time.Duration(cfg.cp.ProxyWriteTimeoutMs)*time.Millisecond)
+	if err != nil {
+		return err
+	}
+	pt.MaxIdleConnsPerHost = httpproxy.DefaultMaxIdleConnsPerHost
+
+	if err = cfg.ec.PeerSelfCert(); err != nil {
+		plog.Fatalf("could not get certs (%v)", err)
+	}
+	tr, err := transport.NewTimeoutTransport(cfg.ec.PeerTLSInfo, time.Duration(cfg.cp.ProxyDialTimeoutMs)*time.Millisecond, time.Duration(cfg.cp.ProxyReadTimeoutMs)*time.Millisecond, time.Duration(cfg.cp.ProxyWriteTimeoutMs)*time.Millisecond)
+	if err != nil {
+		return err
+	}
+
+	cfg.ec.Dir = filepath.Join(cfg.ec.Dir, "proxy")
+	err = os.MkdirAll(cfg.ec.Dir, fileutil.PrivateDirMode)
+	if err != nil {
+		return err
+	}
+
+	var peerURLs []string
+	clusterfile := filepath.Join(cfg.ec.Dir, "cluster")
+
+	b, err := ioutil.ReadFile(clusterfile)
+	switch {
+	case err == nil:
+		if cfg.ec.Durl != "" {
+			plog.Warningf("discovery token ignored since the proxy has already been initialized. Valid cluster file found at %q", clusterfile)
+		}
+		if cfg.ec.DNSCluster != "" {
+			plog.Warningf("DNS SRV discovery ignored since the proxy has already been initialized. Valid cluster file found at %q", clusterfile)
+		}
+		urls := struct{ PeerURLs []string }{}
+		err = json.Unmarshal(b, &urls)
+		if err != nil {
+			return err
+		}
+		peerURLs = urls.PeerURLs
+		plog.Infof("proxy: using peer urls %v from cluster file %q", peerURLs, clusterfile)
+	case os.IsNotExist(err):
+		var urlsmap types.URLsMap
+		urlsmap, _, err = cfg.ec.PeerURLsMapAndToken("proxy")
+		if err != nil {
+			return fmt.Errorf("error setting up initial cluster: %v", err)
+		}
+
+		if cfg.ec.Durl != "" {
+			var s string
+			s, err = discovery.GetCluster(cfg.ec.Durl, cfg.ec.Dproxy)
+			if err != nil {
+				return err
+			}
+			if urlsmap, err = types.NewURLsMap(s); err != nil {
+				return err
+			}
+		}
+		peerURLs = urlsmap.URLs()
+		plog.Infof("proxy: using peer urls %v ", peerURLs)
+	default:
+		return err
+	}
+
+	clientURLs := []string{}
+	uf := func() []string {
+		gcls, gerr := etcdserver.GetClusterFromRemotePeers(peerURLs, tr)
+
+		if gerr != nil {
+			plog.Warningf("proxy: %v", gerr)
+			return []string{}
+		}
+
+		clientURLs = gcls.ClientURLs()
+
+		urls := struct{ PeerURLs []string }{gcls.PeerURLs()}
+		b, jerr := json.Marshal(urls)
+		if jerr != nil {
+			plog.Warningf("proxy: error on marshal peer urls %s", jerr)
+			return clientURLs
+		}
+
+		err = pkgioutil.WriteAndSyncFile(clusterfile+".bak", b, 0600)
+		if err != nil {
+			plog.Warningf("proxy: error on writing urls %s", err)
+			return clientURLs
+		}
+		err = os.Rename(clusterfile+".bak", clusterfile)
+		if err != nil {
+			plog.Warningf("proxy: error on updating clusterfile %s", err)
+			return clientURLs
+		}
+		if !reflect.DeepEqual(gcls.PeerURLs(), peerURLs) {
+			plog.Noticef("proxy: updated peer urls in cluster file from %v to %v", peerURLs, gcls.PeerURLs())
+		}
+		peerURLs = gcls.PeerURLs()
+
+		return clientURLs
+	}
+	ph := httpproxy.NewHandler(pt, uf, time.Duration(cfg.cp.ProxyFailureWaitMs)*time.Millisecond, time.Duration(cfg.cp.ProxyRefreshIntervalMs)*time.Millisecond)
+	ph = &cors.CORSHandler{
+		Handler: ph,
+		Info:    cfg.ec.CorsInfo,
+	}
+
+	if cfg.isReadonlyProxy() {
+		ph = httpproxy.NewReadonlyHandler(ph)
+	}
+
+	// setup self signed certs when serving https
+	cHosts, cTLS := []string{}, false
+	for _, u := range cfg.ec.LCUrls {
+		cHosts = append(cHosts, u.Host)
+		cTLS = cTLS || u.Scheme == "https"
+	}
+	for _, u := range cfg.ec.ACUrls {
+		cHosts = append(cHosts, u.Host)
+		cTLS = cTLS || u.Scheme == "https"
+	}
+	listenerTLS := cfg.ec.ClientTLSInfo
+	if cfg.ec.ClientAutoTLS && cTLS {
+		listenerTLS, err = transport.SelfCert(filepath.Join(cfg.ec.Dir, "clientCerts"), cHosts)
+		if err != nil {
+			plog.Fatalf("proxy: could not initialize self-signed client certs (%v)", err)
+		}
+	}
+
+	// Start a proxy server goroutine for each listen address
+	for _, u := range cfg.ec.LCUrls {
+		l, err := transport.NewListener(u.Host, u.Scheme, &listenerTLS)
+		if err != nil {
+			return err
+		}
+
+		host := u.String()
+		go func() {
+			plog.Info("proxy: listening for client requests on ", host)
+			mux := http.NewServeMux()
+			etcdhttp.HandlePrometheus(mux) // v2 proxy just uses the same port
+			mux.Handle("/", ph)
+			plog.Fatal(http.Serve(l, mux))
+		}()
+	}
+	return nil
+}
+
+// identifyDataDirOrDie returns the type of the data dir.
+// Dies if the datadir is invalid.
+func identifyDataDirOrDie(dir string) dirType {
+	names, err := fileutil.ReadDir(dir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return dirEmpty
+		}
+		plog.Fatalf("error listing data dir: %s", dir)
+	}
+
+	var m, p bool
+	for _, name := range names {
+		switch dirType(name) {
+		case dirMember:
+			m = true
+		case dirProxy:
+			p = true
+		default:
+			plog.Warningf("found invalid file/dir %s under data dir %s (Ignore this if you are upgrading etcd)", name, dir)
+		}
+	}
+
+	if m && p {
+		plog.Fatal("invalid datadir. Both member and proxy directories exist.")
+	}
+	if m {
+		return dirMember
+	}
+	if p {
+		return dirProxy
+	}
+	return dirEmpty
+}
+
+func checkSupportArch() {
+	// TODO qualify arm64
+	if runtime.GOARCH == "amd64" || runtime.GOARCH == "ppc64le" {
+		return
+	}
+	// unsupported arch only configured via environment variable
+	// so unset here to not parse through flag
+	defer os.Unsetenv("ETCD_UNSUPPORTED_ARCH")
+	if env, ok := os.LookupEnv("ETCD_UNSUPPORTED_ARCH"); ok && env == runtime.GOARCH {
+		plog.Warningf("running etcd on unsupported architecture %q since ETCD_UNSUPPORTED_ARCH is set", env)
+		return
+	}
+	plog.Errorf("etcd on unsupported platform without ETCD_UNSUPPORTED_ARCH=%s set.", runtime.GOARCH)
+	os.Exit(1)
+}