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*: do not backup files still in use

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This commit is contained in:
Xiang Li 2014-12-12 14:38:18 -08:00
parent ea94d19147
commit f538cba272
2 changed files with 16 additions and 2 deletions
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2
etcdctl/command/backup_command.go
View File

@ -67,7 +67,7 @@ func handleBackup(c *cli.Context) {
} }
} }
w, err := wal.OpenAtIndex(srcWAL, index) w, err := wal.OpenAtIndexUntilUsing(srcWAL, index)
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)
} }

14
wal/wal.go
View File

@ -21,6 +21,7 @@ import (
"fmt" "fmt"
"hash/crc32" "hash/crc32"
"io" "io"
"log"
"os" "os"
"path" "path"
"reflect" "reflect"
@ -123,6 +124,14 @@ func Create(dirpath string, metadata []byte) (*WAL, error) {
// index. The WAL cannot be appended to before reading out all of its // index. The WAL cannot be appended to before reading out all of its
// previous records. // previous records.
func OpenAtIndex(dirpath string, index uint64) (*WAL, error) { func OpenAtIndex(dirpath string, index uint64) (*WAL, error) {
return openAtIndex(dirpath, index, true)
}
func OpenAtIndexUntilUsing(dirpath string, index uint64) (*WAL, error) {
return openAtIndex(dirpath, index, false)
}
func openAtIndex(dirpath string, index uint64, all bool) (*WAL, error) {
names, err := fileutil.ReadDir(dirpath) names, err := fileutil.ReadDir(dirpath)
if err != nil { if err != nil {
return nil, err return nil, err
@ -153,7 +162,12 @@ func OpenAtIndex(dirpath string, index uint64) (*WAL, error) {
} }
err = l.TryLock() err = l.TryLock()
if err != nil { if err != nil {
if all {
return nil, err return nil, err
} else {
log.Printf("wal: opened all the files until %s, since it is still in use by an etcd server", name)
break
}
} }
rcs = append(rcs, f) rcs = append(rcs, f)
ls = append(ls, l) ls = append(ls, l)