101 lines
2.9 KiB
Go
101 lines
2.9 KiB
Go
// Copyright 2015 CoreOS, Inc.
|
|
//
|
|
// 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 command
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"path"
|
|
"time"
|
|
|
|
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
|
|
"github.com/coreos/etcd/etcdserver/etcdserverpb"
|
|
"github.com/coreos/etcd/pkg/idutil"
|
|
"github.com/coreos/etcd/pkg/pbutil"
|
|
"github.com/coreos/etcd/snap"
|
|
"github.com/coreos/etcd/wal"
|
|
"github.com/coreos/etcd/wal/walpb"
|
|
)
|
|
|
|
func NewBackupCommand() cli.Command {
|
|
return cli.Command{
|
|
Name: "backup",
|
|
Usage: "backup an etcd directory",
|
|
Flags: []cli.Flag{
|
|
cli.StringFlag{Name: "data-dir", Value: "", Usage: "Path to the etcd data dir"},
|
|
cli.StringFlag{Name: "backup-dir", Value: "", Usage: "Path to the backup dir"},
|
|
},
|
|
Action: handleBackup,
|
|
}
|
|
}
|
|
|
|
// handleBackup handles a request that intends to do a backup.
|
|
func handleBackup(c *cli.Context) {
|
|
srcSnap := path.Join(c.String("data-dir"), "member", "snap")
|
|
destSnap := path.Join(c.String("backup-dir"), "member", "snap")
|
|
srcWAL := path.Join(c.String("data-dir"), "member", "wal")
|
|
destWAL := path.Join(c.String("backup-dir"), "member", "wal")
|
|
|
|
if err := os.MkdirAll(destSnap, 0700); err != nil {
|
|
log.Fatalf("failed creating backup snapshot dir %v: %v", destSnap, err)
|
|
}
|
|
ss := snap.New(srcSnap)
|
|
snapshot, err := ss.Load()
|
|
if err != nil && err != snap.ErrNoSnapshot {
|
|
log.Fatal(err)
|
|
}
|
|
var walsnap walpb.Snapshot
|
|
if snapshot != nil {
|
|
walsnap.Index, walsnap.Term = snapshot.Metadata.Index, snapshot.Metadata.Term
|
|
newss := snap.New(destSnap)
|
|
if err := newss.SaveSnap(*snapshot); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
|
|
w, err := wal.OpenForRead(srcWAL, walsnap)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer w.Close()
|
|
wmetadata, state, ents, err := w.ReadAll()
|
|
switch err {
|
|
case nil:
|
|
case wal.ErrSnapshotNotFound:
|
|
fmt.Printf("Failed to find the match snapshot record %+v in wal %v.", walsnap, srcWAL)
|
|
fmt.Printf("etcdctl will add it back. Start auto fixing...")
|
|
default:
|
|
log.Fatal(err)
|
|
}
|
|
var metadata etcdserverpb.Metadata
|
|
pbutil.MustUnmarshal(&metadata, wmetadata)
|
|
idgen := idutil.NewGenerator(0, time.Now())
|
|
metadata.NodeID = idgen.Next()
|
|
metadata.ClusterID = idgen.Next()
|
|
|
|
neww, err := wal.Create(destWAL, pbutil.MustMarshal(&metadata))
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer neww.Close()
|
|
if err := neww.Save(state, ents); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if err := neww.SaveSnapshot(walsnap); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|