mirror of
https://github.com/seaweedfs/seaweedfs.git
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274 lines
7.7 KiB
Go
274 lines
7.7 KiB
Go
package topology
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import (
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"errors"
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"fmt"
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"math/rand"
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"sync"
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"time"
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"github.com/chrislusf/raft"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/sequence"
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"github.com/chrislusf/seaweedfs/weed/storage"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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"github.com/chrislusf/seaweedfs/weed/storage/super_block"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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type Topology struct {
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vacuumLockCounter int64
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NodeImpl
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collectionMap *util.ConcurrentReadMap
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ecShardMap map[needle.VolumeId]*EcShardLocations
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ecShardMapLock sync.RWMutex
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pulse int64
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volumeSizeLimit uint64
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replicationAsMin bool
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Sequence sequence.Sequencer
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chanFullVolumes chan storage.VolumeInfo
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Configuration *Configuration
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RaftServer raft.Server
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}
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func NewTopology(id string, seq sequence.Sequencer, volumeSizeLimit uint64, pulse int, replicationAsMin bool) *Topology {
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t := &Topology{}
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t.id = NodeId(id)
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t.nodeType = "Topology"
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t.NodeImpl.value = t
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t.children = make(map[NodeId]Node)
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t.collectionMap = util.NewConcurrentReadMap()
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t.ecShardMap = make(map[needle.VolumeId]*EcShardLocations)
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t.pulse = int64(pulse)
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t.volumeSizeLimit = volumeSizeLimit
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t.replicationAsMin = replicationAsMin
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t.Sequence = seq
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t.chanFullVolumes = make(chan storage.VolumeInfo)
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t.Configuration = &Configuration{}
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return t
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}
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func (t *Topology) IsLeader() bool {
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if t.RaftServer != nil {
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if t.RaftServer.State() == raft.Leader {
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return true
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}
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}
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return false
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}
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func (t *Topology) Leader() (string, error) {
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l := ""
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for count := 0; count < 3; count++ {
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if t.RaftServer != nil {
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l = t.RaftServer.Leader()
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} else {
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return "", errors.New("Raft Server not ready yet!")
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}
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if l != "" {
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break
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} else {
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time.Sleep(time.Duration(5+count) * time.Second)
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}
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}
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return l, nil
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}
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func (t *Topology) Lookup(collection string, vid needle.VolumeId) (dataNodes []*DataNode) {
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// maybe an issue if lots of collections?
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if collection == "" {
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for _, c := range t.collectionMap.Items() {
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if list := c.(*Collection).Lookup(vid); list != nil {
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return list
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}
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}
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} else {
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if c, ok := t.collectionMap.Find(collection); ok {
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return c.(*Collection).Lookup(vid)
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}
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}
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if locations, found := t.LookupEcShards(vid); found {
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for _, loc := range locations.Locations {
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dataNodes = append(dataNodes, loc...)
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}
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return dataNodes
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}
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return nil
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}
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func (t *Topology) NextVolumeId() (needle.VolumeId, error) {
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vid := t.GetMaxVolumeId()
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next := vid.Next()
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if _, err := t.RaftServer.Do(NewMaxVolumeIdCommand(next)); err != nil {
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return 0, err
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}
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return next, nil
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}
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func (t *Topology) HasWritableVolume(option *VolumeGrowOption) bool {
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vl := t.GetVolumeLayout(option.Collection, option.ReplicaPlacement, option.Ttl, option.DiskType)
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return vl.GetActiveVolumeCount(option) > 0
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}
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func (t *Topology) PickForWrite(count uint64, option *VolumeGrowOption) (string, uint64, *DataNode, error) {
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vid, count, datanodes, err := t.GetVolumeLayout(option.Collection, option.ReplicaPlacement, option.Ttl, option.DiskType).PickForWrite(count, option)
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if err != nil {
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return "", 0, nil, fmt.Errorf("failed to find writable volumes for collection:%s replication:%s ttl:%s error: %v", option.Collection, option.ReplicaPlacement.String(), option.Ttl.String(), err)
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}
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if datanodes.Length() == 0 {
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return "", 0, nil, fmt.Errorf("no writable volumes available for collection:%s replication:%s ttl:%s", option.Collection, option.ReplicaPlacement.String(), option.Ttl.String())
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}
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fileId := t.Sequence.NextFileId(count)
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return needle.NewFileId(*vid, fileId, rand.Uint32()).String(), count, datanodes.Head(), nil
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}
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func (t *Topology) GetVolumeLayout(collectionName string, rp *super_block.ReplicaPlacement, ttl *needle.TTL, diskType storage.DiskType) *VolumeLayout {
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return t.collectionMap.Get(collectionName, func() interface{} {
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return NewCollection(collectionName, t.volumeSizeLimit, t.replicationAsMin)
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}).(*Collection).GetOrCreateVolumeLayout(rp, ttl, diskType)
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}
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func (t *Topology) ListCollections(includeNormalVolumes, includeEcVolumes bool) (ret []string) {
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mapOfCollections := make(map[string]bool)
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for _, c := range t.collectionMap.Items() {
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mapOfCollections[c.(*Collection).Name] = true
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}
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if includeEcVolumes {
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t.ecShardMapLock.RLock()
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for _, ecVolumeLocation := range t.ecShardMap {
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mapOfCollections[ecVolumeLocation.Collection] = true
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}
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t.ecShardMapLock.RUnlock()
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}
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for k := range mapOfCollections {
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ret = append(ret, k)
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}
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return ret
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}
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func (t *Topology) FindCollection(collectionName string) (*Collection, bool) {
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c, hasCollection := t.collectionMap.Find(collectionName)
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if !hasCollection {
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return nil, false
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}
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return c.(*Collection), hasCollection
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}
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func (t *Topology) DeleteCollection(collectionName string) {
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t.collectionMap.Delete(collectionName)
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}
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func (t *Topology) DeleteLayout(collectionName string, rp *super_block.ReplicaPlacement, ttl *needle.TTL, diskType storage.DiskType) {
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collection, found := t.FindCollection(collectionName)
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if !found {
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return
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}
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collection.DeleteVolumeLayout(rp, ttl, diskType)
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if len(collection.storageType2VolumeLayout.Items()) == 0 {
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t.DeleteCollection(collectionName)
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}
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}
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func (t *Topology) RegisterVolumeLayout(v storage.VolumeInfo, dn *DataNode) {
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diskType, _ := storage.ToDiskType(v.DiskType)
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vl := t.GetVolumeLayout(v.Collection, v.ReplicaPlacement, v.Ttl, diskType)
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vl.RegisterVolume(&v, dn)
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vl.EnsureCorrectWritables(&v)
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}
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func (t *Topology) UnRegisterVolumeLayout(v storage.VolumeInfo, dn *DataNode) {
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glog.Infof("removing volume info: %+v", v)
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diskType, _ := storage.ToDiskType(v.DiskType)
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volumeLayout := t.GetVolumeLayout(v.Collection, v.ReplicaPlacement, v.Ttl, diskType)
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volumeLayout.UnRegisterVolume(&v, dn)
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if volumeLayout.isEmpty() {
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t.DeleteLayout(v.Collection, v.ReplicaPlacement, v.Ttl, diskType)
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}
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}
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func (t *Topology) GetOrCreateDataCenter(dcName string) *DataCenter {
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for _, c := range t.Children() {
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dc := c.(*DataCenter)
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if string(dc.Id()) == dcName {
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return dc
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}
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}
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dc := NewDataCenter(dcName)
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t.LinkChildNode(dc)
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return dc
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}
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func (t *Topology) SyncDataNodeRegistration(volumes []*master_pb.VolumeInformationMessage, dn *DataNode) (newVolumes, deletedVolumes []storage.VolumeInfo) {
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// convert into in memory struct storage.VolumeInfo
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var volumeInfos []storage.VolumeInfo
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for _, v := range volumes {
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if vi, err := storage.NewVolumeInfo(v); err == nil {
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volumeInfos = append(volumeInfos, vi)
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} else {
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glog.V(0).Infof("Fail to convert joined volume information: %v", err)
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}
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}
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// find out the delta volumes
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var changedVolumes []storage.VolumeInfo
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newVolumes, deletedVolumes, changedVolumes = dn.UpdateVolumes(volumeInfos)
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for _, v := range newVolumes {
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t.RegisterVolumeLayout(v, dn)
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}
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for _, v := range deletedVolumes {
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t.UnRegisterVolumeLayout(v, dn)
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}
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for _, v := range changedVolumes {
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diskType, _ := storage.ToDiskType(v.DiskType)
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vl := t.GetVolumeLayout(v.Collection, v.ReplicaPlacement, v.Ttl, diskType)
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vl.EnsureCorrectWritables(&v)
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}
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return
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}
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func (t *Topology) IncrementalSyncDataNodeRegistration(newVolumes, deletedVolumes []*master_pb.VolumeShortInformationMessage, dn *DataNode) {
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var newVis, oldVis []storage.VolumeInfo
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for _, v := range newVolumes {
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vi, err := storage.NewVolumeInfoFromShort(v)
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if err != nil {
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glog.V(0).Infof("NewVolumeInfoFromShort %v: %v", v, err)
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continue
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}
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newVis = append(newVis, vi)
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}
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for _, v := range deletedVolumes {
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vi, err := storage.NewVolumeInfoFromShort(v)
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if err != nil {
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glog.V(0).Infof("NewVolumeInfoFromShort %v: %v", v, err)
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continue
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}
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oldVis = append(oldVis, vi)
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}
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dn.DeltaUpdateVolumes(newVis, oldVis)
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for _, vi := range newVis {
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t.RegisterVolumeLayout(vi, dn)
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}
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for _, vi := range oldVis {
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t.UnRegisterVolumeLayout(vi, dn)
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}
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return
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}
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