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etcdctl: fix snapshot status accidentally modified the db file #8815

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merged 1 commit into from
Nov 8, 2017
Merged

etcdctl: fix snapshot status accidentally modified the db file #8815

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29 changes: 29 additions & 0 deletions e2e/ctl_v3_snapshot_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,35 @@ func snapshotCorruptTest(cx ctlCtx) {
}
}

// This test ensures that the snapshot status does not modify the snapshot file
func TestCtlV3SnapshotStatusBeforeRestore(t *testing.T) { testCtl(t, snapshotStatusBeforeRestoreTest) }

func snapshotStatusBeforeRestoreTest(cx ctlCtx) {
fpath := "test.snapshot"
defer os.RemoveAll(fpath)

if err := ctlV3SnapshotSave(cx, fpath); err != nil {
cx.t.Fatalf("snapshotTest ctlV3SnapshotSave error (%v)", err)
}

// snapshot status on the fresh snapshot file
_, err := getSnapshotStatus(cx, fpath)
if err != nil {
cx.t.Fatalf("snapshotTest getSnapshotStatus error (%v)", err)
}

defer os.RemoveAll("snap.etcd")
serr := spawnWithExpect(
append(cx.PrefixArgs(), "snapshot", "restore",
"--data-dir", "snap.etcd",
fpath),
"added member")

if serr != nil {
cx.t.Fatal(serr)
}
}

func ctlV3SnapshotSave(cx ctlCtx, fpath string) error {
cmdArgs := append(cx.PrefixArgs(), "snapshot", "save", fpath)
return spawnWithExpect(cmdArgs, fmt.Sprintf("Snapshot saved at %s", fpath))
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2 changes: 1 addition & 1 deletion etcdctl/ctlv3/command/snapshot_command.go
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Original file line number Diff line number Diff line change
Expand Up @@ -409,7 +409,7 @@ func dbStatus(p string) dbstatus {

ds := dbstatus{}

db, err := bolt.Open(p, 0400, nil)
db, err := bolt.Open(p, 0400, &bolt.Options{ReadOnly: true})
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we still need the nofsync option. also the file is already opened as readonly (0400), it is strange that we write it somehow...

can you also add an e2e test for the case that you described to prevent any potential regression?

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oh. i looked at the open code in boltdb, it does not try to interpret the fileperm bit anyway...

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only ReadOnly is OK; bbolt will detect if there's a free list or not, which is why it was rebuilding the free list here

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er, i will add a e2e test for the integrity verification with ReadOnly Option soon

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it seems there is no test case for etcdctl ... should i add a new test file for snapshot_command or somewhere else ?

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@zrss

see https://github.com/coreos/etcd/blob/master/e2e/ctl_v3_snapshot_test.go

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@xiang90 PTAL

if err != nil {
ExitWithError(ExitError, err)
}
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