// UpgradeWAL converts an older version of the EtcdServer data to the newest version.
// It must ensure that, after upgrading, the most recent version is present.
func UpgradeWAL(cfg *ServerConfig, ver wal.WalVersion) error {
if ver == wal.WALv0_4 {
log.Print("Converting v0.4 log to v0.5")
err := migrate.Migrate4To5(cfg.DataDir, cfg.Name)
if err != nil {
log.Fatalf("Failed migrating data-dir: %v", err)
return err
}
}
return nil
}
func main() {
from := flag.String("data-dir", "", "etcd v0.4 data-dir")
name := flag.String("name", "", "etcd node name")
flag.Parse()
if *from == "" {
log.Fatal("Must provide -data-dir flag")
}
err := migrate.Migrate4To5(*from, *name)
if err != nil {
log.Fatalf("Failed migrating data-dir: %v", err)
}
}