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snap: fix write snap

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Do not use writeFile since it does not sync file before closing.
This can lead to slient file corruption when disk is full.
This commit is contained in:
Xiang Li 2016-06-02 07:35:24 -07:00
parent 29d2caf14a
commit ab0ccdc4df
1 changed files with 7 additions and 1 deletions
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8
snap/snapshotter.go
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@ -26,6 +26,7 @@ import (
"strings"
"time"
pioutil "github.com/coreos/etcd/pkg/ioutil"
"github.com/coreos/etcd/pkg/pbutil"
"github.com/coreos/etcd/raft"
"github.com/coreos/etcd/raft/raftpb"
@ -83,9 +84,14 @@ func (s *Snapshotter) save(snapshot *raftpb.Snapshot) error {
marshallingDurations.Observe(float64(time.Since(start)) / float64(time.Second))
}
err = ioutil.WriteFile(path.Join(s.dir, fname), d, 0666)
err = pioutil.WriteAndSyncFile(path.Join(s.dir, fname), d, 0666)
if err == nil {
saveDurations.Observe(float64(time.Since(start)) / float64(time.Second))
} else {
err1 := os.Remove(path.Join(s.dir, fname))
if err1 != nil {
plog.Errorf("failed to remove broken snapshot file %s", path.Join(s.dir, fname))
}
}
return err
}