diff --git a/vendor/github.com/coreos/etcd/compactor/revision.go b/vendor/github.com/coreos/etcd/compactor/revision.go
new file mode 100644
index 0000000..927e41c
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/compactor/revision.go
@@ -0,0 +1,115 @@
+// 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 compactor
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
+	"github.com/coreos/etcd/mvcc"
+
+	"github.com/jonboulle/clockwork"
+)
+
+// Revision compacts the log by purging revisions older than
+// the configured reivison number. Compaction happens every 5 minutes.
+type Revision struct {
+	clock     clockwork.Clock
+	retention int64
+
+	rg RevGetter
+	c  Compactable
+
+	ctx    context.Context
+	cancel context.CancelFunc
+
+	mu     sync.Mutex
+	paused bool
+}
+
+// NewRevision creates a new instance of Revisonal compactor that purges
+// the log older than retention revisions from the current revision.
+func NewRevision(retention int64, rg RevGetter, c Compactable) *Revision {
+	return newRevision(clockwork.NewRealClock(), retention, rg, c)
+}
+
+func newRevision(clock clockwork.Clock, retention int64, rg RevGetter, c Compactable) *Revision {
+	t := &Revision{
+		clock:     clock,
+		retention: retention,
+		rg:        rg,
+		c:         c,
+	}
+	t.ctx, t.cancel = context.WithCancel(context.Background())
+	return t
+}
+
+const revInterval = 5 * time.Minute
+
+// Run runs revision-based compactor.
+func (t *Revision) Run() {
+	prev := int64(0)
+	go func() {
+		for {
+			select {
+			case <-t.ctx.Done():
+				return
+			case <-t.clock.After(revInterval):
+				t.mu.Lock()
+				p := t.paused
+				t.mu.Unlock()
+				if p {
+					continue
+				}
+			}
+
+			rev := t.rg.Rev() - t.retention
+			if rev <= 0 || rev == prev {
+				continue
+			}
+
+			plog.Noticef("Starting auto-compaction at revision %d (retention: %d revisions)", rev, t.retention)
+			_, err := t.c.Compact(t.ctx, &pb.CompactionRequest{Revision: rev})
+			if err == nil || err == mvcc.ErrCompacted {
+				prev = rev
+				plog.Noticef("Finished auto-compaction at revision %d", rev)
+			} else {
+				plog.Noticef("Failed auto-compaction at revision %d (%v)", rev, err)
+				plog.Noticef("Retry after %v", revInterval)
+			}
+		}
+	}()
+}
+
+// Stop stops revision-based compactor.
+func (t *Revision) Stop() {
+	t.cancel()
+}
+
+// Pause pauses revision-based compactor.
+func (t *Revision) Pause() {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	t.paused = true
+}
+
+// Resume resumes revision-based compactor.
+func (t *Revision) Resume() {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	t.paused = false
+}