diff --git a/vendor/go.etcd.io/etcd/etcdserver/v2_server.go b/vendor/go.etcd.io/etcd/etcdserver/v2_server.go
new file mode 100644
index 0000000..9238b2d
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/etcdserver/v2_server.go
@@ -0,0 +1,165 @@
+// Copyright 2016 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 etcdserver
+
+import (
+	"context"
+	"time"
+
+	"go.etcd.io/etcd/etcdserver/api/v2store"
+	pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
+)
+
+type RequestV2 pb.Request
+
+type RequestV2Handler interface {
+	Post(ctx context.Context, r *RequestV2) (Response, error)
+	Put(ctx context.Context, r *RequestV2) (Response, error)
+	Delete(ctx context.Context, r *RequestV2) (Response, error)
+	QGet(ctx context.Context, r *RequestV2) (Response, error)
+	Get(ctx context.Context, r *RequestV2) (Response, error)
+	Head(ctx context.Context, r *RequestV2) (Response, error)
+}
+
+type reqV2HandlerEtcdServer struct {
+	reqV2HandlerStore
+	s *EtcdServer
+}
+
+type reqV2HandlerStore struct {
+	store   v2store.Store
+	applier ApplierV2
+}
+
+func NewStoreRequestV2Handler(s v2store.Store, applier ApplierV2) RequestV2Handler {
+	return &reqV2HandlerStore{s, applier}
+}
+
+func (a *reqV2HandlerStore) Post(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.applier.Post(r), nil
+}
+
+func (a *reqV2HandlerStore) Put(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.applier.Put(r), nil
+}
+
+func (a *reqV2HandlerStore) Delete(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.applier.Delete(r), nil
+}
+
+func (a *reqV2HandlerStore) QGet(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.applier.QGet(r), nil
+}
+
+func (a *reqV2HandlerStore) Get(ctx context.Context, r *RequestV2) (Response, error) {
+	if r.Wait {
+		wc, err := a.store.Watch(r.Path, r.Recursive, r.Stream, r.Since)
+		return Response{Watcher: wc}, err
+	}
+	ev, err := a.store.Get(r.Path, r.Recursive, r.Sorted)
+	return Response{Event: ev}, err
+}
+
+func (a *reqV2HandlerStore) Head(ctx context.Context, r *RequestV2) (Response, error) {
+	ev, err := a.store.Get(r.Path, r.Recursive, r.Sorted)
+	return Response{Event: ev}, err
+}
+
+func (a *reqV2HandlerEtcdServer) Post(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.processRaftRequest(ctx, r)
+}
+
+func (a *reqV2HandlerEtcdServer) Put(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.processRaftRequest(ctx, r)
+}
+
+func (a *reqV2HandlerEtcdServer) Delete(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.processRaftRequest(ctx, r)
+}
+
+func (a *reqV2HandlerEtcdServer) QGet(ctx context.Context, r *RequestV2) (Response, error) {
+	return a.processRaftRequest(ctx, r)
+}
+
+func (a *reqV2HandlerEtcdServer) processRaftRequest(ctx context.Context, r *RequestV2) (Response, error) {
+	data, err := ((*pb.Request)(r)).Marshal()
+	if err != nil {
+		return Response{}, err
+	}
+	ch := a.s.w.Register(r.ID)
+
+	start := time.Now()
+	a.s.r.Propose(ctx, data)
+	proposalsPending.Inc()
+	defer proposalsPending.Dec()
+
+	select {
+	case x := <-ch:
+		resp := x.(Response)
+		return resp, resp.Err
+	case <-ctx.Done():
+		proposalsFailed.Inc()
+		a.s.w.Trigger(r.ID, nil) // GC wait
+		return Response{}, a.s.parseProposeCtxErr(ctx.Err(), start)
+	case <-a.s.stopping:
+	}
+	return Response{}, ErrStopped
+}
+
+func (s *EtcdServer) Do(ctx context.Context, r pb.Request) (Response, error) {
+	r.ID = s.reqIDGen.Next()
+	h := &reqV2HandlerEtcdServer{
+		reqV2HandlerStore: reqV2HandlerStore{
+			store:   s.v2store,
+			applier: s.applyV2,
+		},
+		s: s,
+	}
+	rp := &r
+	resp, err := ((*RequestV2)(rp)).Handle(ctx, h)
+	resp.Term, resp.Index = s.Term(), s.CommittedIndex()
+	return resp, err
+}
+
+// Handle interprets r and performs an operation on s.store according to r.Method
+// and other fields. If r.Method is "POST", "PUT", "DELETE", or a "GET" with
+// Quorum == true, r will be sent through consensus before performing its
+// respective operation. Do will block until an action is performed or there is
+// an error.
+func (r *RequestV2) Handle(ctx context.Context, v2api RequestV2Handler) (Response, error) {
+	if r.Method == "GET" && r.Quorum {
+		r.Method = "QGET"
+	}
+	switch r.Method {
+	case "POST":
+		return v2api.Post(ctx, r)
+	case "PUT":
+		return v2api.Put(ctx, r)
+	case "DELETE":
+		return v2api.Delete(ctx, r)
+	case "QGET":
+		return v2api.QGet(ctx, r)
+	case "GET":
+		return v2api.Get(ctx, r)
+	case "HEAD":
+		return v2api.Head(ctx, r)
+	}
+	return Response{}, ErrUnknownMethod
+}
+
+func (r *RequestV2) String() string {
+	rpb := pb.Request(*r)
+	return rpb.String()
+}