package shell import ( "flag" "fmt" "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/pb" "github.com/seaweedfs/seaweedfs/weed/pb/master_pb" "github.com/seaweedfs/seaweedfs/weed/storage/types" "github.com/seaweedfs/seaweedfs/weed/wdclient" "io" "path/filepath" "sync" "time" "github.com/seaweedfs/seaweedfs/weed/storage/needle" ) func init() { Commands = append(Commands, &commandVolumeTierMove{}) } type volumeTierMoveJob struct { src pb.ServerAddress vid needle.VolumeId } type commandVolumeTierMove struct { activeServers sync.Map queues map[pb.ServerAddress]chan volumeTierMoveJob //activeServers map[pb.ServerAddress]struct{} //activeServersLock sync.Mutex //activeServersCond *sync.Cond } func (c *commandVolumeTierMove) Name() string { return "volume.tier.move" } func (c *commandVolumeTierMove) Help() string { return `change a volume from one disk type to another volume.tier.move -fromDiskType=hdd -toDiskType=ssd [-collectionPattern=""] [-fullPercent=95] [-quietFor=1h] [-parallelLimit=4] Even if the volume is replicated, only one replica will be changed and the rest replicas will be dropped. So "volume.fix.replication" and "volume.balance" should be followed. ` } func (c *commandVolumeTierMove) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) { tierCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError) collectionPattern := tierCommand.String("collectionPattern", "", "match with wildcard characters '*' and '?'") fullPercentage := tierCommand.Float64("fullPercent", 95, "the volume reaches the percentage of max volume size") quietPeriod := tierCommand.Duration("quietFor", 24*time.Hour, "select volumes without no writes for this period") source := tierCommand.String("fromDiskType", "", "the source disk type") target := tierCommand.String("toDiskType", "", "the target disk type") parallelLimit := tierCommand.Int("parallelLimit", 0, "limit the number of parallel copying jobs") applyChange := tierCommand.Bool("force", false, "actually apply the changes") if err = tierCommand.Parse(args); err != nil { return nil } infoAboutSimulationMode(writer, *applyChange, "-force") if err = commandEnv.confirmIsLocked(args); err != nil { return } fromDiskType := types.ToDiskType(*source) toDiskType := types.ToDiskType(*target) if fromDiskType == toDiskType { return fmt.Errorf("source tier %s is the same as target tier %s", fromDiskType, toDiskType) } // collect topology information topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv, 0) if err != nil { return err } // collect all volumes that should change volumeIds, err := collectVolumeIdsForTierChange(commandEnv, topologyInfo, volumeSizeLimitMb, fromDiskType, *collectionPattern, *fullPercentage, *quietPeriod) if err != nil { return err } fmt.Printf("tier move volumes: %v\n", volumeIds) _, allLocations := collectVolumeReplicaLocations(topologyInfo) allLocations = filterLocationsByDiskType(allLocations, toDiskType) keepDataNodesSorted(allLocations, toDiskType) if len(allLocations) > 0 && *parallelLimit > 0 && *parallelLimit < len(allLocations) { allLocations = allLocations[:*parallelLimit] } wg := sync.WaitGroup{} bufferLen := len(allLocations) c.queues = make(map[pb.ServerAddress]chan volumeTierMoveJob) for _, dst := range allLocations { destServerAddress := pb.NewServerAddressFromDataNode(dst.dataNode) c.queues[destServerAddress] = make(chan volumeTierMoveJob, bufferLen) wg.Add(1) go func(dst location, jobs <-chan volumeTierMoveJob, applyChanges bool) { defer wg.Done() for job := range jobs { fmt.Fprintf(writer, "moving volume %d from %s to %s with disk type %s ...\n", job.vid, job.src, dst.dataNode.Id, toDiskType.ReadableString()) locations, found := commandEnv.MasterClient.GetLocations(uint32(job.vid)) if !found { fmt.Printf("volume %d not found", job.vid) continue } unlock := c.Lock(job.src) if applyChanges { if err := c.doMoveOneVolume(commandEnv, writer, job.vid, toDiskType, locations, job.src, dst); err != nil { fmt.Fprintf(writer, "move volume %d %s => %s: %v\n", job.vid, job.src, dst.dataNode.Id, err) } } unlock() } }(dst, c.queues[destServerAddress], *applyChange) } for _, vid := range volumeIds { if err = c.doVolumeTierMove(commandEnv, writer, vid, toDiskType, allLocations); err != nil { fmt.Printf("tier move volume %d: %v\n", vid, err) } allLocations = rotateDataNodes(allLocations) } for key, _ := range c.queues { close(c.queues[key]) } wg.Wait() return nil } func (c *commandVolumeTierMove) Lock(key pb.ServerAddress) func() { value, _ := c.activeServers.LoadOrStore(key, &sync.Mutex{}) mtx := value.(*sync.Mutex) mtx.Lock() return func() { mtx.Unlock() } } func filterLocationsByDiskType(dataNodes []location, diskType types.DiskType) (ret []location) { for _, loc := range dataNodes { _, found := loc.dataNode.DiskInfos[string(diskType)] if found { ret = append(ret, loc) } } return } func rotateDataNodes(dataNodes []location) []location { if len(dataNodes) > 0 { return append(dataNodes[1:], dataNodes[0]) } else { return dataNodes } } func isOneOf(server string, locations []wdclient.Location) bool { for _, loc := range locations { if server == loc.Url { return true } } return false } func (c *commandVolumeTierMove) doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, allLocations []location) (err error) { // find volume location locations, found := commandEnv.MasterClient.GetLocations(uint32(vid)) if !found { return fmt.Errorf("volume %d not found", vid) } // find one server with the most empty volume slots with target disk type hasFoundTarget := false fn := capacityByFreeVolumeCount(toDiskType) for _, dst := range allLocations { if fn(dst.dataNode) > 0 && !hasFoundTarget { // ask the volume server to replicate the volume if isOneOf(dst.dataNode.Id, locations) { continue } var sourceVolumeServer pb.ServerAddress for _, loc := range locations { if loc.Url != dst.dataNode.Id { sourceVolumeServer = loc.ServerAddress() } } if sourceVolumeServer == "" { continue } hasFoundTarget = true // adjust volume count dst.dataNode.DiskInfos[string(toDiskType)].VolumeCount++ destServerAddress := pb.NewServerAddressFromDataNode(dst.dataNode) c.queues[destServerAddress] <- volumeTierMoveJob{sourceVolumeServer, vid} } } if !hasFoundTarget { fmt.Fprintf(writer, "can not find disk type %s for volume %d\n", toDiskType.ReadableString(), vid) } return nil } func (c *commandVolumeTierMove) doMoveOneVolume(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, locations []wdclient.Location, sourceVolumeServer pb.ServerAddress, dst location) (err error) { // mark all replicas as read only if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, false); err != nil { return fmt.Errorf("mark volume %d as readonly on %s: %v", vid, locations[0].Url, err) } if err = LiveMoveVolume(commandEnv.option.GrpcDialOption, writer, vid, sourceVolumeServer, pb.NewServerAddressFromDataNode(dst.dataNode), 5*time.Second, toDiskType.ReadableString(), true); err != nil { // mark all replicas as writable if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, true); err != nil { glog.Errorf("mark volume %d as writable on %s: %v", vid, locations[0].Url, err) } return fmt.Errorf("move volume %d %s => %s : %v", vid, locations[0].Url, dst.dataNode.Id, err) } // remove the remaining replicas for _, loc := range locations { if loc.Url != dst.dataNode.Id && loc.ServerAddress() != sourceVolumeServer { if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.ServerAddress()); err != nil { fmt.Fprintf(writer, "failed to delete volume %d on %s: %v\n", vid, loc.Url, err) } // reduce volume count? Not really necessary since they are "more" full and will not be a candidate to move to } } return nil } func collectVolumeIdsForTierChange(commandEnv *CommandEnv, topologyInfo *master_pb.TopologyInfo, volumeSizeLimitMb uint64, sourceTier types.DiskType, collectionPattern string, fullPercentage float64, quietPeriod time.Duration) (vids []needle.VolumeId, err error) { quietSeconds := int64(quietPeriod / time.Second) nowUnixSeconds := time.Now().Unix() fmt.Printf("collect %s volumes quiet for: %d seconds\n", sourceTier, quietSeconds) vidMap := make(map[uint32]bool) eachDataNode(topologyInfo, func(dc string, rack RackId, dn *master_pb.DataNodeInfo) { for _, diskInfo := range dn.DiskInfos { for _, v := range diskInfo.VolumeInfos { // check collection name pattern if collectionPattern != "" { matched, err := filepath.Match(collectionPattern, v.Collection) if err != nil { return } if !matched { continue } } if v.ModifiedAtSecond+quietSeconds < nowUnixSeconds && types.ToDiskType(v.DiskType) == sourceTier { if float64(v.Size) > fullPercentage/100*float64(volumeSizeLimitMb)*1024*1024 { vidMap[v.Id] = true } } } } }) for vid := range vidMap { vids = append(vids, needle.VolumeId(vid)) } return }