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Merge pull request #2363 from yichengq/329

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migrate/starter: fix v2 data dir checking
This commit is contained in:
Yicheng Qin 2015-02-24 22:44:10 -08:00
commit 6648b7e302
2 changed files with 18 additions and 39 deletions
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40
migrate/starter/starter.go
View File

@ -30,11 +30,10 @@ import (
"github.com/coreos/etcd/client"
"github.com/coreos/etcd/etcdmain"
"github.com/coreos/etcd/migrate"
"github.com/coreos/etcd/pkg/fileutil"
"github.com/coreos/etcd/pkg/flags"
"github.com/coreos/etcd/pkg/osutil"
"github.com/coreos/etcd/pkg/types"
etcdversion "github.com/coreos/etcd/version"
"github.com/coreos/etcd/wal"
"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
)
@ -106,17 +105,17 @@ func checkInternalVersion(fs *flag.FlagSet) version {
log.Fatalf("starter: please set --data-dir or ETCD_DATA_DIR for etcd")
}
// check the data directory
dataver, err := checkVersion(dataDir)
dataver, err := wal.DetectVersion(dataDir)
if err != nil {
log.Fatalf("starter: failed to detect etcd version in %v: %v", dataDir, err)
}
log.Printf("starter: detect etcd version %s in %s", dataver, dataDir)
switch dataver {
case v2_0:
case wal.WALv2_0:
return internalV2
case v2_0Proxy:
case wal.WALv2_0Proxy:
return internalV2Proxy
case v0_4:
case wal.WALv0_4:
standbyInfo, err := migrate.DecodeStandbyInfo4FromFile(standbyInfo4(dataDir))
if err != nil && !os.IsNotExist(err) {
log.Fatalf("starter: failed to decode standbyInfo in %v: %v", dataDir, err)
@ -140,7 +139,7 @@ func checkInternalVersion(fs *flag.FlagSet) version {
log.Fatalf("starter: failed to check start version in %v: %v", dataDir, err)
}
return ver
case empty:
case wal.WALNotExist:
discovery := fs.Lookup("discovery").Value.String()
dpeers, err := getPeersFromDiscoveryURL(discovery)
if err != nil {
@ -162,33 +161,6 @@ func checkInternalVersion(fs *flag.FlagSet) version {
return internalUnknown
}
func checkVersion(dataDir string) (version, error) {
names, err := fileutil.ReadDir(dataDir)
if err != nil {
if os.IsNotExist(err) {
err = nil
}
return empty, err
}
if len(names) == 0 {
return empty, nil
}
nameSet := types.NewUnsafeSet(names...)
if nameSet.ContainsAll([]string{"member"}) {
return v2_0, nil
}
if nameSet.ContainsAll([]string{"proxy"}) {
return v2_0Proxy, nil
}
if nameSet.ContainsAll([]string{"snapshot", "conf", "log"}) {
return v0_4, nil
}
if nameSet.ContainsAll([]string{"standby_info"}) {
return v0_4, nil
}
return unknown, fmt.Errorf("failed to check version")
}
func checkInternalVersionByDataDir4(dataDir string) (version, error) {
// check v0.4 snapshot
snap4, err := migrate.DecodeLatestSnapshot4FromDir(snapDir4(dataDir))

17
wal/util.go
View File

@ -28,11 +28,12 @@ import (
type WalVersion string
const (
WALUnknown WalVersion = "Unknown WAL"
WALNotExist WalVersion = "No WAL"
WALv0_4 WalVersion = "0.4.x"
WALv2_0 WalVersion = "2.0.0"
WALv2_0_1 WalVersion = "2.0.1"
WALUnknown WalVersion = "Unknown WAL"
WALNotExist WalVersion = "No WAL"
WALv0_4 WalVersion = "0.4.x"
WALv2_0 WalVersion = "2.0.0"
WALv2_0Proxy WalVersion = "2.0 proxy"
WALv2_0_1 WalVersion = "2.0.1"
)
func DetectVersion(dirpath string) (WalVersion, error) {
@ -65,9 +66,15 @@ func DetectVersion(dirpath string) (WalVersion, error) {
return WALv2_0, nil
}
}
if nameSet.ContainsAll([]string{"proxy"}) {
return WALv2_0Proxy, nil
}
if nameSet.ContainsAll([]string{"snapshot", "conf", "log"}) {
return WALv0_4, nil
}
if nameSet.ContainsAll([]string{"standby_info"}) {
return WALv0_4, nil
}
return WALUnknown, nil
}