mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-07-01 06:40:45 +02:00
271 lines
8.5 KiB
Go
271 lines
8.5 KiB
Go
package shell
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import (
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"bytes"
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"context"
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"flag"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
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"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
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"io"
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"math"
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"sort"
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)
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func init() {
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Commands = append(Commands, &commandVolumeCheckDisk{})
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}
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type commandVolumeCheckDisk struct {
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env *CommandEnv
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}
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func (c *commandVolumeCheckDisk) Name() string {
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return "volume.check.disk"
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}
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func (c *commandVolumeCheckDisk) Help() string {
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return `check all replicated volumes to find and fix inconsistencies
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How it works:
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find all volumes that are replicated
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for each volume id, if there are more than 2 replicas, find one pair with the largest 2 in file count.
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for the pair volume A and B
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append entries in A and not in B to B
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append entries in B and not in A to A
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`
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}
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func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
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if err = commandEnv.confirmIsLocked(); err != nil {
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return
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}
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fsckCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
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slowMode := fsckCommand.Bool("slow", false, "slow mode checks all replicas even file counts are the same")
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verbose := fsckCommand.Bool("v", false, "verbose mode")
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applyChanges := fsckCommand.Bool("force", false, "apply the fix")
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nonRepairThreshold := fsckCommand.Float64("nonRepairThreshold", 0.3, "repair when missing keys is not more than this limit")
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if err = fsckCommand.Parse(args); err != nil {
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return nil
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}
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c.env = commandEnv
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// collect topology information
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topologyInfo, _, err := collectTopologyInfo(commandEnv)
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if err != nil {
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return err
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}
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volumeReplicas, _ := collectVolumeReplicaLocations(topologyInfo)
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// pick 1 pairs of volume replica
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fileCount := func(replica *VolumeReplica) uint64 {
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return replica.info.FileCount - replica.info.DeleteCount
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}
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aDB, bDB := needle_map.NewMemDb(), needle_map.NewMemDb()
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defer aDB.Close()
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defer bDB.Close()
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for _, replicas := range volumeReplicas {
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sort.Slice(replicas, func(i, j int) bool {
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return fileCount(replicas[i]) > fileCount(replicas[j])
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})
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for len(replicas) >= 2 {
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a, b := replicas[0], replicas[1]
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if !*slowMode {
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if fileCount(a) == fileCount(b) {
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replicas = replicas[1:]
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continue
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}
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}
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if a.info.ReadOnly || b.info.ReadOnly {
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fmt.Fprintf(writer, "skipping readonly volume %d on %s and %s\n", a.info.Id, a.location.dataNode.Id, b.location.dataNode.Id)
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replicas = replicas[1:]
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continue
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}
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if err := c.syncTwoReplicas(aDB, bDB, a, verbose, writer, b, err, applyChanges, nonRepairThreshold); err != nil {
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fmt.Fprintf(writer, "sync volume %d on %s and %s: %v\n", a.info.Id, a.location.dataNode.Id, b.location.dataNode.Id, err)
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}
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replicas = replicas[1:]
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}
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}
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return nil
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}
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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 {
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aHasChanges, bHasChanges := true, true
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for aHasChanges || bHasChanges {
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// reset index db
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aDB.Close()
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bDB.Close()
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aDB, bDB = needle_map.NewMemDb(), needle_map.NewMemDb()
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// read index db
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if err := c.readIndexDatabase(aDB, a.info.Collection, a.info.Id, a.location.dataNode.Id, *verbose, writer); err != nil {
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return err
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}
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if err := c.readIndexDatabase(bDB, b.info.Collection, b.info.Id, b.location.dataNode.Id, *verbose, writer); err != nil {
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return err
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}
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// find and make up the differences
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if aHasChanges, err = c.doVolumeCheckDisk(aDB, bDB, a, b, *verbose, writer, *applyChanges, *nonRepairThreshold); err != nil {
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return err
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}
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if bHasChanges, err = c.doVolumeCheckDisk(bDB, aDB, b, a, *verbose, writer, *applyChanges, *nonRepairThreshold); err != nil {
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return err
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}
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}
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return nil
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}
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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) {
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// find missing keys
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// hash join, can be more efficient
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var missingNeedles []needle_map.NeedleValue
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var counter int
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subtrahend.AscendingVisit(func(value needle_map.NeedleValue) error {
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counter++
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if _, found := minuend.Get(value.Key); !found {
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missingNeedles = append(missingNeedles, value)
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}
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return nil
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})
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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))
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if counter == 0 || len(missingNeedles) == 0 {
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return false, nil
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}
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missingNeedlesFraction := float64(len(missingNeedles)) / float64(counter)
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if missingNeedlesFraction > nonRepairThreshold {
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return false, fmt.Errorf(
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"failed to start repair volume %d, percentage of missing keys is greater than the threshold: %.2f > %.2f",
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source.info.Id, missingNeedlesFraction, nonRepairThreshold)
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}
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for _, needleValue := range missingNeedles {
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needleBlob, err := c.readSourceNeedleBlob(source.location.dataNode.Id, source.info.Id, needleValue)
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if err != nil {
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return hasChanges, err
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}
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if !applyChanges {
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continue
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}
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if verbose {
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fmt.Fprintf(writer, "read %d,%x %s => %s \n", source.info.Id, needleValue.Key, source.location.dataNode.Id, target.location.dataNode.Id)
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}
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hasChanges = true
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if err = c.writeNeedleBlobToTarget(target.location.dataNode.Id, source.info.Id, needleValue, needleBlob); err != nil {
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return hasChanges, err
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}
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}
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return
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}
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func (c *commandVolumeCheckDisk) readSourceNeedleBlob(sourceVolumeServer string, volumeId uint32, needleValue needle_map.NeedleValue) (needleBlob []byte, err error) {
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err = operation.WithVolumeServerClient(sourceVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
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resp, err := client.ReadNeedleBlob(context.Background(), &volume_server_pb.ReadNeedleBlobRequest{
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VolumeId: volumeId,
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NeedleId: uint64(needleValue.Key),
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Offset: needleValue.Offset.ToActualOffset(),
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Size: int32(needleValue.Size),
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})
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if err != nil {
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return err
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}
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needleBlob = resp.NeedleBlob
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return nil
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})
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return
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}
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func (c *commandVolumeCheckDisk) writeNeedleBlobToTarget(targetVolumeServer string, volumeId uint32, needleValue needle_map.NeedleValue, needleBlob []byte) error {
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return operation.WithVolumeServerClient(targetVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
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_, err := client.WriteNeedleBlob(context.Background(), &volume_server_pb.WriteNeedleBlobRequest{
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VolumeId: volumeId,
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NeedleId: uint64(needleValue.Key),
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Size: int32(needleValue.Size),
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NeedleBlob: needleBlob,
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})
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return err
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})
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}
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func (c *commandVolumeCheckDisk) readIndexDatabase(db *needle_map.MemDb, collection string, volumeId uint32, volumeServer string, verbose bool, writer io.Writer) error {
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var buf bytes.Buffer
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if err := c.copyVolumeIndexFile(collection, volumeId, volumeServer, &buf, verbose, writer); err != nil {
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return err
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}
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if verbose {
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fmt.Fprintf(writer, "load collection %s volume %d index size %d from %s ...\n", collection, volumeId, buf.Len(), volumeServer)
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}
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return db.LoadFromReaderAt(bytes.NewReader(buf.Bytes()))
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}
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func (c *commandVolumeCheckDisk) copyVolumeIndexFile(collection string, volumeId uint32, volumeServer string, buf *bytes.Buffer, verbose bool, writer io.Writer) error {
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return operation.WithVolumeServerClient(volumeServer, c.env.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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ext := ".idx"
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copyFileClient, err := volumeServerClient.CopyFile(context.Background(), &volume_server_pb.CopyFileRequest{
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VolumeId: volumeId,
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Ext: ".idx",
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CompactionRevision: math.MaxUint32,
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StopOffset: math.MaxInt64,
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Collection: collection,
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IsEcVolume: false,
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IgnoreSourceFileNotFound: false,
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})
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if err != nil {
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return fmt.Errorf("failed to start copying volume %d%s: %v", volumeId, ext, err)
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}
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err = writeToBuffer(copyFileClient, buf)
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if err != nil {
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return fmt.Errorf("failed to copy %d%s from %s: %v", volumeId, ext, volumeServer, err)
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}
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return nil
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})
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}
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func writeToBuffer(client volume_server_pb.VolumeServer_CopyFileClient, buf *bytes.Buffer) error {
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for {
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resp, receiveErr := client.Recv()
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if receiveErr == io.EOF {
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break
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}
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if receiveErr != nil {
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return fmt.Errorf("receiving: %v", receiveErr)
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}
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buf.Write(resp.FileContent)
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}
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return nil
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}
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