diff --git a/vendor/github.com/coreos/etcd/rafthttp/peer_status.go b/vendor/github.com/coreos/etcd/rafthttp/peer_status.go
new file mode 100644
index 0000000..69cbd38
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/rafthttp/peer_status.go
@@ -0,0 +1,77 @@
+// 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 rafthttp
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/coreos/etcd/pkg/types"
+)
+
+type failureType struct {
+	source string
+	action string
+}
+
+type peerStatus struct {
+	id     types.ID
+	mu     sync.Mutex // protect variables below
+	active bool
+	since  time.Time
+}
+
+func newPeerStatus(id types.ID) *peerStatus {
+	return &peerStatus{
+		id: id,
+	}
+}
+
+func (s *peerStatus) activate() {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if !s.active {
+		plog.Infof("peer %s became active", s.id)
+		s.active = true
+		s.since = time.Now()
+	}
+}
+
+func (s *peerStatus) deactivate(failure failureType, reason string) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	msg := fmt.Sprintf("failed to %s %s on %s (%s)", failure.action, s.id, failure.source, reason)
+	if s.active {
+		plog.Errorf(msg)
+		plog.Infof("peer %s became inactive (message send to peer failed)", s.id)
+		s.active = false
+		s.since = time.Time{}
+		return
+	}
+	plog.Debugf(msg)
+}
+
+func (s *peerStatus) isActive() bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.active
+}
+
+func (s *peerStatus) activeSince() time.Time {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.since
+}