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package shell
import (
"flag"
"fmt"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/storage/types"
"github.com/chrislusf/seaweedfs/weed/wdclient"
"io"
"time"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
)
func init() {
Commands = append(Commands, &commandVolumeTierMove{})
}
type commandVolumeTierMove struct {
}
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 [-collection=""] [-fullPercent=95] [-quietFor=1h]
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) {
if err = commandEnv.confirmIsLocked(); err != nil {
return
}
tierCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
collection := tierCommand.String("collection", "", "the collection name")
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")
applyChange := tierCommand.Bool("force", false, "actually apply the changes")
if err = tierCommand.Parse(args); err != nil {
return nil
}
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)
if err != nil {
return err
}
// collect all volumes that should change
volumeIds, err := collectVolumeIdsForTierChange(commandEnv, topologyInfo, volumeSizeLimitMb, fromDiskType, *collection, *fullPercentage, *quietPeriod)
if err != nil {
return err
}
fmt.Printf("tier move volumes: %v\n", volumeIds)
_, allLocations := collectVolumeReplicaLocations(topologyInfo)
for _, vid := range volumeIds {
if err = doVolumeTierMove(commandEnv, writer, *collection, vid, toDiskType, allLocations, *applyChange); err != nil {
fmt.Printf("tier move volume %d: %v\n", vid, err)
}
}
return nil
}
func isOneOf(server string, locations []wdclient.Location) bool {
for _, loc := range locations {
if server == loc.Url {
return true
}
}
return false
}
func doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, collection string, vid needle.VolumeId, toDiskType types.DiskType, allLocations []location, applyChanges bool) (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
keepDataNodesSorted(allLocations, toDiskType)
fn := capacityByFreeVolumeCount(toDiskType)
for _, dst := range allLocations {
if fn(dst.dataNode) > 0 {
// ask the volume server to replicate the volume
if isOneOf(dst.dataNode.Id, locations) {
continue
}
sourceVolumeServer := ""
for _, loc := range locations {
if loc.Url != dst.dataNode.Id {
sourceVolumeServer = loc.Url
}
}
if sourceVolumeServer == "" {
continue
}
fmt.Fprintf(writer, "moving volume %d from %s to %s with disk type %s ...\n", vid, sourceVolumeServer, dst.dataNode.Id, toDiskType.ReadableString())
hasFoundTarget = true
if !applyChanges {
break
}
// mark all replicas as read only
if err = markVolumeReadonly(commandEnv.option.GrpcDialOption, vid, locations); err != nil {
return fmt.Errorf("mark volume %d as readonly on %s: %v", vid, locations[0].Url, err)
}
if err = LiveMoveVolume(commandEnv.option.GrpcDialOption, vid, sourceVolumeServer, dst.dataNode.Id, 5*time.Second, toDiskType.ReadableString()); err != nil {
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 != sourceVolumeServer {
if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.Url); err != nil {
fmt.Fprintf(writer, "failed to delete volume %d on %s\n", vid, loc.Url)
}
}
}
}
}
if !hasFoundTarget {
fmt.Fprintf(writer, "can not find disk type %s for volume %d\n", toDiskType.ReadableString(), vid)
}
return nil
}
func collectVolumeIdsForTierChange(commandEnv *CommandEnv, topologyInfo *master_pb.TopologyInfo, volumeSizeLimitMb uint64, sourceTier types.DiskType, selectedCollection 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 {
if v.Collection == selectedCollection && 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
}
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