mirror of
https://github.com/seaweedfs/seaweedfs.git
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205 lines
8.4 KiB
Go
205 lines
8.4 KiB
Go
package shell
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import (
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"context"
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"flag"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/pb"
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"github.com/chrislusf/seaweedfs/weed/wdclient"
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"io"
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"log"
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"time"
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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"
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"google.golang.org/grpc"
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)
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func init() {
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Commands = append(Commands, &commandVolumeMove{})
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}
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type commandVolumeMove struct {
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}
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func (c *commandVolumeMove) Name() string {
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return "volume.move"
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}
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func (c *commandVolumeMove) Help() string {
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return `move a live volume from one volume server to another volume server
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volume.move -source <source volume server host:port> -target <target volume server host:port> -volumeId <volume id>
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volume.move -source <source volume server host:port> -target <target volume server host:port> -volumeId <volume id> -disk [hdd|ssd|<tag>]
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This command move a live volume from one volume server to another volume server. Here are the steps:
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1. This command asks the target volume server to copy the source volume from source volume server, remember the last entry's timestamp.
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2. This command asks the target volume server to mount the new volume
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Now the master will mark this volume id as readonly.
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3. This command asks the target volume server to tail the source volume for updates after the timestamp, for 1 minutes to drain the requests.
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4. This command asks the source volume server to unmount the source volume
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Now the master will mark this volume id as writable.
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5. This command asks the source volume server to delete the source volume
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The option "-disk [hdd|ssd|<tag>]" can be used to change the volume disk type.
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`
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}
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func (c *commandVolumeMove) 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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volMoveCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
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volumeIdInt := volMoveCommand.Int("volumeId", 0, "the volume id")
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sourceNodeStr := volMoveCommand.String("source", "", "the source volume server <host>:<port>")
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targetNodeStr := volMoveCommand.String("target", "", "the target volume server <host>:<port>")
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diskTypeStr := volMoveCommand.String("disk", "", "[hdd|ssd|<tag>] hard drive or solid state drive or any tag")
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if err = volMoveCommand.Parse(args); err != nil {
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return nil
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}
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sourceVolumeServer, targetVolumeServer := pb.ServerAddress(*sourceNodeStr), pb.ServerAddress(*targetNodeStr)
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volumeId := needle.VolumeId(*volumeIdInt)
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if sourceVolumeServer == targetVolumeServer {
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return fmt.Errorf("source and target volume servers are the same!")
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}
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return LiveMoveVolume(commandEnv.option.GrpcDialOption, writer, volumeId, sourceVolumeServer, targetVolumeServer, 5*time.Second, *diskTypeStr, false)
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}
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// LiveMoveVolume moves one volume from one source volume server to one target volume server, with idleTimeout to drain the incoming requests.
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func LiveMoveVolume(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer pb.ServerAddress, idleTimeout time.Duration, diskType string, skipTailError bool) (err error) {
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log.Printf("copying volume %d from %s to %s", volumeId, sourceVolumeServer, targetVolumeServer)
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lastAppendAtNs, err := copyVolume(grpcDialOption, volumeId, sourceVolumeServer, targetVolumeServer, diskType)
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if err != nil {
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return fmt.Errorf("copy volume %d from %s to %s: %v", volumeId, sourceVolumeServer, targetVolumeServer, err)
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}
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log.Printf("tailing volume %d from %s to %s", volumeId, sourceVolumeServer, targetVolumeServer)
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if err = tailVolume(grpcDialOption, volumeId, sourceVolumeServer, targetVolumeServer, lastAppendAtNs, idleTimeout); err != nil {
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if skipTailError {
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fmt.Fprintf(writer, "tail volume %d from %s to %s: %v\n", volumeId, sourceVolumeServer, targetVolumeServer, err)
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} else {
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return fmt.Errorf("tail volume %d from %s to %s: %v", volumeId, sourceVolumeServer, targetVolumeServer, err)
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}
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}
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log.Printf("deleting volume %d from %s", volumeId, sourceVolumeServer)
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if err = deleteVolume(grpcDialOption, volumeId, sourceVolumeServer); err != nil {
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return fmt.Errorf("delete volume %d from %s: %v", volumeId, sourceVolumeServer, err)
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}
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log.Printf("moved volume %d from %s to %s", volumeId, sourceVolumeServer, targetVolumeServer)
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return nil
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}
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func copyVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer pb.ServerAddress, diskType string) (lastAppendAtNs uint64, err error) {
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// check to see if the volume is already read-only and if its not then we need
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// to mark it as read-only and then before we return we need to undo what we
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// did
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var shouldMarkWritable bool
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defer func() {
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if !shouldMarkWritable {
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return
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}
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clientErr := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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_, writableErr := volumeServerClient.VolumeMarkWritable(context.Background(), &volume_server_pb.VolumeMarkWritableRequest{
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VolumeId: uint32(volumeId),
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})
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return writableErr
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})
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if clientErr != nil {
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log.Printf("failed to mark volume %d as writable after copy from %s: %v", volumeId, sourceVolumeServer, clientErr)
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}
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}()
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err = operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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resp, statusErr := volumeServerClient.VolumeStatus(context.Background(), &volume_server_pb.VolumeStatusRequest{
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VolumeId: uint32(volumeId),
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})
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if statusErr == nil && !resp.IsReadOnly {
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shouldMarkWritable = true
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_, readonlyErr := volumeServerClient.VolumeMarkReadonly(context.Background(), &volume_server_pb.VolumeMarkReadonlyRequest{
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VolumeId: uint32(volumeId),
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})
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return readonlyErr
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}
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return statusErr
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})
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if err != nil {
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return
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}
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err = operation.WithVolumeServerClient(targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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resp, replicateErr := volumeServerClient.VolumeCopy(context.Background(), &volume_server_pb.VolumeCopyRequest{
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VolumeId: uint32(volumeId),
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SourceDataNode: string(sourceVolumeServer),
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DiskType: diskType,
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})
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if replicateErr == nil {
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lastAppendAtNs = resp.LastAppendAtNs
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}
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return replicateErr
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})
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return
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}
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func tailVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer pb.ServerAddress, lastAppendAtNs uint64, idleTimeout time.Duration) (err error) {
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return operation.WithVolumeServerClient(targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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_, replicateErr := volumeServerClient.VolumeTailReceiver(context.Background(), &volume_server_pb.VolumeTailReceiverRequest{
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VolumeId: uint32(volumeId),
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SinceNs: lastAppendAtNs,
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IdleTimeoutSeconds: uint32(idleTimeout.Seconds()),
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SourceVolumeServer: string(sourceVolumeServer),
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})
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return replicateErr
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})
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}
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func deleteVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer pb.ServerAddress) (err error) {
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return operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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_, deleteErr := volumeServerClient.VolumeDelete(context.Background(), &volume_server_pb.VolumeDeleteRequest{
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VolumeId: uint32(volumeId),
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})
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return deleteErr
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})
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}
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func markVolumeWritable(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer pb.ServerAddress, writable bool) (err error) {
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return operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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if writable {
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_, err = volumeServerClient.VolumeMarkWritable(context.Background(), &volume_server_pb.VolumeMarkWritableRequest{
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VolumeId: uint32(volumeId),
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})
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} else {
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_, err = volumeServerClient.VolumeMarkReadonly(context.Background(), &volume_server_pb.VolumeMarkReadonlyRequest{
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VolumeId: uint32(volumeId),
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})
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}
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return err
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})
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}
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func markVolumeReplicasWritable(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, locations []wdclient.Location, writable bool) error {
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for _, location := range locations {
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fmt.Printf("markVolumeReadonly %d on %s ...\n", volumeId, location.Url)
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if err := markVolumeWritable(grpcDialOption, volumeId, location.ServerAddress(), writable); 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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