package shell import ( "bytes" "context" "flag" "fmt" "github.com/chrislusf/seaweedfs/weed/operation" "github.com/chrislusf/seaweedfs/weed/pb" "github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb" "github.com/chrislusf/seaweedfs/weed/storage/needle_map" "io" "math" "sort" ) func init() { Commands = append(Commands, &commandVolumeCheckDisk{}) } type commandVolumeCheckDisk struct { env *CommandEnv } func (c *commandVolumeCheckDisk) Name() string { return "volume.check.disk" } func (c *commandVolumeCheckDisk) Help() string { return `check all replicated volumes to find and fix inconsistencies How it works: find all volumes that are replicated for each volume id, if there are more than 2 replicas, find one pair with the largest 2 in file count. for the pair volume A and B append entries in A and not in B to B append entries in B and not in A to A ` } func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) { fsckCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError) slowMode := fsckCommand.Bool("slow", false, "slow mode checks all replicas even file counts are the same") verbose := fsckCommand.Bool("v", false, "verbose mode") applyChanges := fsckCommand.Bool("force", false, "apply the fix") nonRepairThreshold := fsckCommand.Float64("nonRepairThreshold", 0.3, "repair when missing keys is not more than this limit") if err = fsckCommand.Parse(args); err != nil { return nil } if err = commandEnv.confirmIsLocked(); err != nil { return } c.env = commandEnv // collect topology information topologyInfo, _, err := collectTopologyInfo(commandEnv) if err != nil { return err } volumeReplicas, _ := collectVolumeReplicaLocations(topologyInfo) // pick 1 pairs of volume replica fileCount := func(replica *VolumeReplica) uint64 { return replica.info.FileCount - replica.info.DeleteCount } aDB, bDB := needle_map.NewMemDb(), needle_map.NewMemDb() defer aDB.Close() defer bDB.Close() for _, replicas := range volumeReplicas { sort.Slice(replicas, func(i, j int) bool { return fileCount(replicas[i]) > fileCount(replicas[j]) }) for len(replicas) >= 2 { a, b := replicas[0], replicas[1] if !*slowMode { if fileCount(a) == fileCount(b) { replicas = replicas[1:] continue } } if a.info.ReadOnly || b.info.ReadOnly { fmt.Fprintf(writer, "skipping readonly volume %d on %s and %s\n", a.info.Id, a.location.dataNode.Id, b.location.dataNode.Id) replicas = replicas[1:] continue } if err := c.syncTwoReplicas(aDB, bDB, a, verbose, writer, b, err, applyChanges, nonRepairThreshold); err != nil { fmt.Fprintf(writer, "sync volume %d on %s and %s: %v\n", a.info.Id, a.location.dataNode.Id, b.location.dataNode.Id, err) } replicas = replicas[1:] } } return nil } func (c *commandVolumeCheckDisk) syncTwoReplicas(aDB *needle_map.MemDb, bDB *needle_map.MemDb, a *VolumeReplica, verbose *bool, writer io.Writer, b *VolumeReplica, err error, applyChanges *bool, nonRepairThreshold *float64) error { aHasChanges, bHasChanges := true, true for aHasChanges || bHasChanges { // reset index db aDB.Close() bDB.Close() aDB, bDB = needle_map.NewMemDb(), needle_map.NewMemDb() // read index db if err := c.readIndexDatabase(aDB, a.info.Collection, a.info.Id, pb.NewServerAddressFromDataNode(a.location.dataNode), *verbose, writer); err != nil { return err } if err := c.readIndexDatabase(bDB, b.info.Collection, b.info.Id, pb.NewServerAddressFromDataNode(b.location.dataNode), *verbose, writer); err != nil { return err } // find and make up the differences if aHasChanges, err = c.doVolumeCheckDisk(aDB, bDB, a, b, *verbose, writer, *applyChanges, *nonRepairThreshold); err != nil { return err } if bHasChanges, err = c.doVolumeCheckDisk(bDB, aDB, b, a, *verbose, writer, *applyChanges, *nonRepairThreshold); err != nil { return err } } return nil } func (c *commandVolumeCheckDisk) doVolumeCheckDisk(subtrahend, minuend *needle_map.MemDb, source, target *VolumeReplica, verbose bool, writer io.Writer, applyChanges bool, nonRepairThreshold float64) (hasChanges bool, err error) { // find missing keys // hash join, can be more efficient var missingNeedles []needle_map.NeedleValue var counter int subtrahend.AscendingVisit(func(value needle_map.NeedleValue) error { counter++ if _, found := minuend.Get(value.Key); !found { missingNeedles = append(missingNeedles, value) } return nil }) fmt.Fprintf(writer, "volume %d %s has %d entries, %s missed %d entries\n", source.info.Id, source.location.dataNode.Id, counter, target.location.dataNode.Id, len(missingNeedles)) if counter == 0 || len(missingNeedles) == 0 { return false, nil } missingNeedlesFraction := float64(len(missingNeedles)) / float64(counter) if missingNeedlesFraction > nonRepairThreshold { return false, fmt.Errorf( "failed to start repair volume %d, percentage of missing keys is greater than the threshold: %.2f > %.2f", source.info.Id, missingNeedlesFraction, nonRepairThreshold) } for _, needleValue := range missingNeedles { needleBlob, err := c.readSourceNeedleBlob(pb.NewServerAddressFromDataNode(source.location.dataNode), source.info.Id, needleValue) if err != nil { return hasChanges, err } if !applyChanges { continue } if verbose { fmt.Fprintf(writer, "read %d,%x %s => %s \n", source.info.Id, needleValue.Key, source.location.dataNode.Id, target.location.dataNode.Id) } hasChanges = true if err = c.writeNeedleBlobToTarget(pb.NewServerAddressFromDataNode(target.location.dataNode), source.info.Id, needleValue, needleBlob); err != nil { return hasChanges, err } } return } func (c *commandVolumeCheckDisk) readSourceNeedleBlob(sourceVolumeServer pb.ServerAddress, volumeId uint32, needleValue needle_map.NeedleValue) (needleBlob []byte, err error) { err = operation.WithVolumeServerClient(sourceVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error { resp, err := client.ReadNeedleBlob(context.Background(), &volume_server_pb.ReadNeedleBlobRequest{ VolumeId: volumeId, NeedleId: uint64(needleValue.Key), Offset: needleValue.Offset.ToActualOffset(), Size: int32(needleValue.Size), }) if err != nil { return err } needleBlob = resp.NeedleBlob return nil }) return } func (c *commandVolumeCheckDisk) writeNeedleBlobToTarget(targetVolumeServer pb.ServerAddress, volumeId uint32, needleValue needle_map.NeedleValue, needleBlob []byte) error { return operation.WithVolumeServerClient(targetVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error { _, err := client.WriteNeedleBlob(context.Background(), &volume_server_pb.WriteNeedleBlobRequest{ VolumeId: volumeId, NeedleId: uint64(needleValue.Key), Size: int32(needleValue.Size), NeedleBlob: needleBlob, }) return err }) } func (c *commandVolumeCheckDisk) readIndexDatabase(db *needle_map.MemDb, collection string, volumeId uint32, volumeServer pb.ServerAddress, verbose bool, writer io.Writer) error { var buf bytes.Buffer if err := c.copyVolumeIndexFile(collection, volumeId, volumeServer, &buf, verbose, writer); err != nil { return err } if verbose { fmt.Fprintf(writer, "load collection %s volume %d index size %d from %s ...\n", collection, volumeId, buf.Len(), volumeServer) } return db.LoadFromReaderAt(bytes.NewReader(buf.Bytes())) } func (c *commandVolumeCheckDisk) copyVolumeIndexFile(collection string, volumeId uint32, volumeServer pb.ServerAddress, buf *bytes.Buffer, verbose bool, writer io.Writer) error { return operation.WithVolumeServerClient(volumeServer, c.env.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error { ext := ".idx" copyFileClient, err := volumeServerClient.CopyFile(context.Background(), &volume_server_pb.CopyFileRequest{ VolumeId: volumeId, Ext: ".idx", CompactionRevision: math.MaxUint32, StopOffset: math.MaxInt64, Collection: collection, IsEcVolume: false, IgnoreSourceFileNotFound: false, }) if err != nil { return fmt.Errorf("failed to start copying volume %d%s: %v", volumeId, ext, err) } err = writeToBuffer(copyFileClient, buf) if err != nil { return fmt.Errorf("failed to copy %d%s from %s: %v", volumeId, ext, volumeServer, err) } return nil }) } func writeToBuffer(client volume_server_pb.VolumeServer_CopyFileClient, buf *bytes.Buffer) error { for { resp, receiveErr := client.Recv() if receiveErr == io.EOF { break } if receiveErr != nil { return fmt.Errorf("receiving: %v", receiveErr) } buf.Write(resp.FileContent) } return nil }