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336 lines
10 KiB
336 lines
10 KiB
package shell
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import (
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"context"
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"fmt"
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"math"
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"sort"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
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"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
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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 moveMountedShardToEcNode(ctx context.Context, commandEnv *CommandEnv, existingLocation *EcNode, collection string, vid needle.VolumeId, shardId erasure_coding.ShardId, destinationEcNode *EcNode, applyBalancing bool) (err error) {
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copiedShardIds := []uint32{uint32(shardId)}
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if applyBalancing {
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// ask destination node to copy shard and the ecx file from source node, and mount it
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copiedShardIds, err = oneServerCopyAndMountEcShardsFromSource(ctx, commandEnv.option.GrpcDialOption, destinationEcNode, uint32(shardId), 1, vid, collection, existingLocation.info.Id)
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if err != nil {
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return err
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}
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// unmount the to be deleted shards
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err = unmountEcShards(ctx, commandEnv.option.GrpcDialOption, vid, existingLocation.info.Id, copiedShardIds)
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if err != nil {
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return err
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}
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// ask source node to delete the shard, and maybe the ecx file
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err = sourceServerDeleteEcShards(ctx, commandEnv.option.GrpcDialOption, collection, vid, existingLocation.info.Id, copiedShardIds)
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if err != nil {
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return err
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}
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fmt.Printf("moved ec shard %d.%d %s => %s\n", vid, shardId, existingLocation.info.Id, destinationEcNode.info.Id)
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}
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destinationEcNode.addEcVolumeShards(vid, collection, copiedShardIds)
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existingLocation.deleteEcVolumeShards(vid, copiedShardIds)
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return nil
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}
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func oneServerCopyAndMountEcShardsFromSource(ctx context.Context, grpcDialOption grpc.DialOption,
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targetServer *EcNode, startFromShardId uint32, shardCount int,
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volumeId needle.VolumeId, collection string, existingLocation string) (copiedShardIds []uint32, err error) {
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var shardIdsToCopy []uint32
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for shardId := startFromShardId; shardId < startFromShardId+uint32(shardCount); shardId++ {
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shardIdsToCopy = append(shardIdsToCopy, shardId)
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}
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fmt.Printf("allocate %d.%v %s => %s\n", volumeId, shardIdsToCopy, existingLocation, targetServer.info.Id)
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err = operation.WithVolumeServerClient(targetServer.info.Id, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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if targetServer.info.Id != existingLocation {
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fmt.Printf("copy %d.%v %s => %s\n", volumeId, shardIdsToCopy, existingLocation, targetServer.info.Id)
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_, copyErr := volumeServerClient.VolumeEcShardsCopy(ctx, &volume_server_pb.VolumeEcShardsCopyRequest{
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VolumeId: uint32(volumeId),
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Collection: collection,
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ShardIds: shardIdsToCopy,
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CopyEcxFile: true,
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SourceDataNode: existingLocation,
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})
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if copyErr != nil {
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return fmt.Errorf("copy %d.%v %s => %s : %v\n", volumeId, shardIdsToCopy, existingLocation, targetServer.info.Id, copyErr)
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}
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}
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fmt.Printf("mount %d.%v on %s\n", volumeId, shardIdsToCopy, targetServer.info.Id)
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_, mountErr := volumeServerClient.VolumeEcShardsMount(ctx, &volume_server_pb.VolumeEcShardsMountRequest{
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VolumeId: uint32(volumeId),
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Collection: collection,
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ShardIds: shardIdsToCopy,
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})
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if mountErr != nil {
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return fmt.Errorf("mount %d.%v on %s : %v\n", volumeId, shardIdsToCopy, targetServer.info.Id, mountErr)
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}
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if targetServer.info.Id != existingLocation {
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copiedShardIds = shardIdsToCopy
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glog.V(0).Infof("%s ec volume %d deletes shards %+v", existingLocation, volumeId, copiedShardIds)
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}
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return nil
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})
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if err != nil {
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return
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}
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return
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}
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func eachDataNode(topo *master_pb.TopologyInfo, fn func(dc string, rack RackId, dn *master_pb.DataNodeInfo)) {
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for _, dc := range topo.DataCenterInfos {
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for _, rack := range dc.RackInfos {
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for _, dn := range rack.DataNodeInfos {
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fn(dc.Id, RackId(rack.Id), dn)
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}
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}
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}
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}
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func sortEcNodes(ecNodes []*EcNode) {
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sort.Slice(ecNodes, func(i, j int) bool {
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return ecNodes[i].freeEcSlot > ecNodes[j].freeEcSlot
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})
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}
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type CandidateEcNode struct {
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ecNode *EcNode
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shardCount int
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}
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// if the index node changed the freeEcSlot, need to keep every EcNode still sorted
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func ensureSortedEcNodes(data []*CandidateEcNode, index int, lessThan func(i, j int) bool) {
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for i := index - 1; i >= 0; i-- {
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if lessThan(i+1, i) {
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swap(data, i, i+1)
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} else {
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break
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}
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}
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for i := index + 1; i < len(data); i++ {
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if lessThan(i, i-1) {
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swap(data, i, i-1)
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} else {
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break
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}
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}
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}
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func swap(data []*CandidateEcNode, i, j int) {
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t := data[i]
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data[i] = data[j]
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data[j] = t
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}
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func countShards(ecShardInfos []*master_pb.VolumeEcShardInformationMessage) (count int) {
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for _, ecShardInfo := range ecShardInfos {
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shardBits := erasure_coding.ShardBits(ecShardInfo.EcIndexBits)
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count += shardBits.ShardIdCount()
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}
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return
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}
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func countFreeShardSlots(dn *master_pb.DataNodeInfo) (count int) {
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return int(dn.FreeVolumeCount)*erasure_coding.DataShardsCount - countShards(dn.EcShardInfos)
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}
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type RackId string
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type EcNodeId string
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type EcNode struct {
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info *master_pb.DataNodeInfo
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dc string
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rack RackId
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freeEcSlot int
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}
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type EcRack struct {
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ecNodes map[EcNodeId]*EcNode
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freeEcSlot int
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}
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func collectEcNodes(ctx context.Context, commandEnv *CommandEnv, selectedDataCenter string) (ecNodes []*EcNode, totalFreeEcSlots int, err error) {
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// list all possible locations
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var resp *master_pb.VolumeListResponse
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err = commandEnv.MasterClient.WithClient(ctx, func(client master_pb.SeaweedClient) error {
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resp, err = client.VolumeList(ctx, &master_pb.VolumeListRequest{})
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return err
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})
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if err != nil {
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return nil, 0, err
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}
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// find out all volume servers with one slot left.
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eachDataNode(resp.TopologyInfo, func(dc string, rack RackId, dn *master_pb.DataNodeInfo) {
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if selectedDataCenter != "" && selectedDataCenter != dc {
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return
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}
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if freeEcSlots := countFreeShardSlots(dn); freeEcSlots > 0 {
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ecNodes = append(ecNodes, &EcNode{
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info: dn,
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dc: dc,
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rack: rack,
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freeEcSlot: int(freeEcSlots),
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})
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totalFreeEcSlots += freeEcSlots
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}
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})
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sortEcNodes(ecNodes)
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return
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}
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func sourceServerDeleteEcShards(ctx context.Context, grpcDialOption grpc.DialOption,
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collection string, volumeId needle.VolumeId, sourceLocation string, toBeDeletedShardIds []uint32) error {
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fmt.Printf("delete %d.%v from %s\n", volumeId, toBeDeletedShardIds, sourceLocation)
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return operation.WithVolumeServerClient(sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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_, deleteErr := volumeServerClient.VolumeEcShardsDelete(ctx, &volume_server_pb.VolumeEcShardsDeleteRequest{
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VolumeId: uint32(volumeId),
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Collection: collection,
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ShardIds: toBeDeletedShardIds,
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})
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return deleteErr
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})
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}
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func unmountEcShards(ctx context.Context, grpcDialOption grpc.DialOption,
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volumeId needle.VolumeId, sourceLocation string, toBeUnmountedhardIds []uint32) error {
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fmt.Printf("unmount %d.%v from %s\n", volumeId, toBeUnmountedhardIds, sourceLocation)
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return operation.WithVolumeServerClient(sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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_, deleteErr := volumeServerClient.VolumeEcShardsUnmount(ctx, &volume_server_pb.VolumeEcShardsUnmountRequest{
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VolumeId: uint32(volumeId),
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ShardIds: toBeUnmountedhardIds,
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})
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return deleteErr
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})
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}
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func mountEcShards(ctx context.Context, grpcDialOption grpc.DialOption,
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collection string, volumeId needle.VolumeId, sourceLocation string, toBeMountedhardIds []uint32) error {
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fmt.Printf("mount %d.%v on %s\n", volumeId, toBeMountedhardIds, sourceLocation)
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return operation.WithVolumeServerClient(sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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_, mountErr := volumeServerClient.VolumeEcShardsMount(ctx, &volume_server_pb.VolumeEcShardsMountRequest{
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VolumeId: uint32(volumeId),
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Collection: collection,
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ShardIds: toBeMountedhardIds,
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})
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return mountErr
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})
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}
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func ceilDivide(total, n int) int {
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return int(math.Ceil(float64(total) / float64(n)))
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}
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func findEcVolumeShards(ecNode *EcNode, vid needle.VolumeId) erasure_coding.ShardBits {
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for _, shardInfo := range ecNode.info.EcShardInfos {
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if needle.VolumeId(shardInfo.Id) == vid {
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return erasure_coding.ShardBits(shardInfo.EcIndexBits)
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}
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}
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return 0
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}
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func (ecNode *EcNode) addEcVolumeShards(vid needle.VolumeId, collection string, shardIds []uint32) *EcNode {
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foundVolume := false
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for _, shardInfo := range ecNode.info.EcShardInfos {
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if needle.VolumeId(shardInfo.Id) == vid {
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oldShardBits := erasure_coding.ShardBits(shardInfo.EcIndexBits)
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newShardBits := oldShardBits
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for _, shardId := range shardIds {
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newShardBits = newShardBits.AddShardId(erasure_coding.ShardId(shardId))
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}
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shardInfo.EcIndexBits = uint32(newShardBits)
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ecNode.freeEcSlot -= newShardBits.ShardIdCount() - oldShardBits.ShardIdCount()
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foundVolume = true
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break
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}
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}
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if !foundVolume {
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var newShardBits erasure_coding.ShardBits
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for _, shardId := range shardIds {
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newShardBits = newShardBits.AddShardId(erasure_coding.ShardId(shardId))
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}
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ecNode.info.EcShardInfos = append(ecNode.info.EcShardInfos, &master_pb.VolumeEcShardInformationMessage{
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Id: uint32(vid),
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Collection: collection,
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EcIndexBits: uint32(newShardBits),
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})
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ecNode.freeEcSlot -= len(shardIds)
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}
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return ecNode
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}
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func (ecNode *EcNode) deleteEcVolumeShards(vid needle.VolumeId, shardIds []uint32) *EcNode {
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for _, shardInfo := range ecNode.info.EcShardInfos {
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if needle.VolumeId(shardInfo.Id) == vid {
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oldShardBits := erasure_coding.ShardBits(shardInfo.EcIndexBits)
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newShardBits := oldShardBits
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for _, shardId := range shardIds {
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newShardBits = newShardBits.RemoveShardId(erasure_coding.ShardId(shardId))
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}
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shardInfo.EcIndexBits = uint32(newShardBits)
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ecNode.freeEcSlot -= newShardBits.ShardIdCount() - oldShardBits.ShardIdCount()
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}
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}
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return ecNode
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}
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func groupByCount(data []*EcNode, identifierFn func(*EcNode) (id string, count int)) map[string]int {
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countMap := make(map[string]int)
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for _, d := range data {
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id, count := identifierFn(d)
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countMap[id] += count
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}
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return countMap
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}
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func groupBy(data []*EcNode, identifierFn func(*EcNode) (id string)) map[string][]*EcNode {
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groupMap := make(map[string][]*EcNode)
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for _, d := range data {
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id := identifierFn(d)
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groupMap[id] = append(groupMap[id], d)
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}
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return groupMap
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}
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