mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
354 lines
10 KiB
Go
354 lines
10 KiB
Go
package storage
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import (
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"encoding/json"
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"errors"
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"fmt"
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"math/rand"
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"strconv"
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"strings"
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"github.com/chrislusf/seaweedfs/go/glog"
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"github.com/chrislusf/seaweedfs/go/operation"
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"github.com/chrislusf/seaweedfs/go/security"
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"github.com/chrislusf/seaweedfs/go/util"
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"github.com/golang/protobuf/proto"
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)
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const (
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MAX_TTL_VOLUME_REMOVAL_DELAY = 10 // 10 minutes
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)
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type MasterNodes struct {
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nodes []string
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lastNode int
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}
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func (mn *MasterNodes) String() string {
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return fmt.Sprintf("nodes:%v, lastNode:%d", mn.nodes, mn.lastNode)
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}
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func NewMasterNodes(bootstrapNode string) (mn *MasterNodes) {
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mn = &MasterNodes{nodes: []string{bootstrapNode}, lastNode: -1}
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return
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}
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func (mn *MasterNodes) reset() {
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glog.V(4).Infof("Resetting master nodes: %v", mn)
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if len(mn.nodes) > 1 && mn.lastNode >= 0 {
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glog.V(0).Infof("Reset master %s from: %v", mn.nodes[mn.lastNode], mn.nodes)
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mn.lastNode = -mn.lastNode - 1
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}
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}
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func (mn *MasterNodes) findMaster() (string, error) {
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if len(mn.nodes) == 0 {
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return "", errors.New("No master node found!")
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}
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if mn.lastNode < 0 {
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for _, m := range mn.nodes {
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glog.V(4).Infof("Listing masters on %s", m)
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if masters, e := operation.ListMasters(m); e == nil {
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if len(masters) == 0 {
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continue
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}
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mn.nodes = append(masters, m)
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mn.lastNode = rand.Intn(len(mn.nodes))
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glog.V(2).Infof("current master nodes is %v", mn)
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break
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} else {
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glog.V(4).Infof("Failed listing masters on %s: %v", m, e)
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}
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}
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}
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if mn.lastNode < 0 {
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return "", errors.New("No master node available!")
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}
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return mn.nodes[mn.lastNode], nil
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}
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/*
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* A VolumeServer contains one Store
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*/
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type Store struct {
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Ip string
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Port int
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PublicUrl string
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Locations []*DiskLocation
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dataCenter string //optional informaton, overwriting master setting if exists
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rack string //optional information, overwriting master setting if exists
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connected bool
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volumeSizeLimit uint64 //read from the master
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masterNodes *MasterNodes
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}
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func (s *Store) String() (str string) {
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str = fmt.Sprintf("Ip:%s, Port:%d, PublicUrl:%s, dataCenter:%s, rack:%s, connected:%v, volumeSizeLimit:%d, masterNodes:%s", s.Ip, s.Port, s.PublicUrl, s.dataCenter, s.rack, s.connected, s.volumeSizeLimit, s.masterNodes)
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return
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}
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func NewStore(port int, ip, publicUrl string, dirnames []string, maxVolumeCounts []int, needleMapKind NeedleMapType) (s *Store) {
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s = &Store{Port: port, Ip: ip, PublicUrl: publicUrl}
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s.Locations = make([]*DiskLocation, 0)
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for i := 0; i < len(dirnames); i++ {
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location := &DiskLocation{Directory: dirnames[i], MaxVolumeCount: maxVolumeCounts[i]}
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location.volumes = make(map[VolumeId]*Volume)
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location.loadExistingVolumes(needleMapKind)
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s.Locations = append(s.Locations, location)
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}
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return
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}
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func (s *Store) AddVolume(volumeListString string, collection string, needleMapKind NeedleMapType, replicaPlacement string, ttlString string) error {
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rt, e := NewReplicaPlacementFromString(replicaPlacement)
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if e != nil {
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return e
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}
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ttl, e := ReadTTL(ttlString)
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if e != nil {
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return e
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}
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for _, range_string := range strings.Split(volumeListString, ",") {
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if strings.Index(range_string, "-") < 0 {
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id_string := range_string
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id, err := NewVolumeId(id_string)
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if err != nil {
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return fmt.Errorf("Volume Id %s is not a valid unsigned integer!", id_string)
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}
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e = s.addVolume(VolumeId(id), collection, needleMapKind, rt, ttl)
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} else {
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pair := strings.Split(range_string, "-")
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start, start_err := strconv.ParseUint(pair[0], 10, 64)
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if start_err != nil {
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return fmt.Errorf("Volume Start Id %s is not a valid unsigned integer!", pair[0])
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}
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end, end_err := strconv.ParseUint(pair[1], 10, 64)
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if end_err != nil {
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return fmt.Errorf("Volume End Id %s is not a valid unsigned integer!", pair[1])
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}
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for id := start; id <= end; id++ {
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if err := s.addVolume(VolumeId(id), collection, needleMapKind, rt, ttl); err != nil {
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e = err
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}
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}
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}
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}
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return e
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}
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func (s *Store) DeleteCollection(collection string) (e error) {
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for _, location := range s.Locations {
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for k, v := range location.volumes {
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if v.Collection == collection {
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e = v.Destroy()
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if e != nil {
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return
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}
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delete(location.volumes, k)
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}
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}
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}
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return
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}
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func (s *Store) DeleteVolume(volumes map[VolumeId]*Volume, v *Volume) (e error) {
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e = v.Destroy()
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if e != nil {
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return
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}
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delete(volumes, v.Id)
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return
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}
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func (s *Store) findVolume(vid VolumeId) *Volume {
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for _, location := range s.Locations {
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if v, found := location.volumes[vid]; found {
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return v
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}
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}
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return nil
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}
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func (s *Store) findFreeLocation() (ret *DiskLocation) {
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max := 0
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for _, location := range s.Locations {
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currentFreeCount := location.MaxVolumeCount - len(location.volumes)
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if currentFreeCount > max {
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max = currentFreeCount
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ret = location
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}
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}
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return ret
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}
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func (s *Store) addVolume(vid VolumeId, collection string, needleMapKind NeedleMapType, replicaPlacement *ReplicaPlacement, ttl *TTL) error {
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if s.findVolume(vid) != nil {
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return fmt.Errorf("Volume Id %d already exists!", vid)
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}
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if location := s.findFreeLocation(); location != nil {
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glog.V(0).Infof("In dir %s adds volume:%v collection:%s replicaPlacement:%v ttl:%v",
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location.Directory, vid, collection, replicaPlacement, ttl)
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if volume, err := NewVolume(location.Directory, collection, vid, needleMapKind, replicaPlacement, ttl); err == nil {
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location.volumes[vid] = volume
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return nil
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} else {
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return err
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}
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}
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return fmt.Errorf("No more free space left")
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}
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func (s *Store) Status() []*VolumeInfo {
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var stats []*VolumeInfo
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for _, location := range s.Locations {
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for k, v := range location.volumes {
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s := &VolumeInfo{
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Id: VolumeId(k),
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Size: v.ContentSize(),
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Collection: v.Collection,
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ReplicaPlacement: v.ReplicaPlacement,
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Version: v.Version(),
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FileCount: v.nm.FileCount(),
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DeleteCount: v.nm.DeletedCount(),
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DeletedByteCount: v.nm.DeletedSize(),
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ReadOnly: v.readOnly,
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Ttl: v.Ttl}
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stats = append(stats, s)
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}
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}
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sortVolumeInfos(stats)
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return stats
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}
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func (s *Store) SetDataCenter(dataCenter string) {
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s.dataCenter = dataCenter
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}
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func (s *Store) SetRack(rack string) {
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s.rack = rack
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}
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func (s *Store) SetBootstrapMaster(bootstrapMaster string) {
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s.masterNodes = NewMasterNodes(bootstrapMaster)
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}
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func (s *Store) SendHeartbeatToMaster() (masterNode string, secretKey security.Secret, e error) {
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masterNode, e = s.masterNodes.findMaster()
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if e != nil {
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return
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}
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var volumeMessages []*operation.VolumeInformationMessage
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maxVolumeCount := 0
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var maxFileKey uint64
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for _, location := range s.Locations {
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maxVolumeCount = maxVolumeCount + location.MaxVolumeCount
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for k, v := range location.volumes {
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if maxFileKey < v.nm.MaxFileKey() {
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maxFileKey = v.nm.MaxFileKey()
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}
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if !v.expired(s.volumeSizeLimit) {
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volumeMessage := &operation.VolumeInformationMessage{
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Id: proto.Uint32(uint32(k)),
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Size: proto.Uint64(uint64(v.Size())),
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Collection: proto.String(v.Collection),
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FileCount: proto.Uint64(uint64(v.nm.FileCount())),
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DeleteCount: proto.Uint64(uint64(v.nm.DeletedCount())),
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DeletedByteCount: proto.Uint64(v.nm.DeletedSize()),
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ReadOnly: proto.Bool(v.readOnly),
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ReplicaPlacement: proto.Uint32(uint32(v.ReplicaPlacement.Byte())),
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Version: proto.Uint32(uint32(v.Version())),
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Ttl: proto.Uint32(v.Ttl.ToUint32()),
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}
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volumeMessages = append(volumeMessages, volumeMessage)
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} else {
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if v.exiredLongEnough(MAX_TTL_VOLUME_REMOVAL_DELAY) {
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s.DeleteVolume(location.volumes, v)
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glog.V(0).Infoln("volume", v.Id, "is deleted.")
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} else {
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glog.V(0).Infoln("volume", v.Id, "is expired.")
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}
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}
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}
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}
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joinMessage := &operation.JoinMessage{
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IsInit: proto.Bool(!s.connected),
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Ip: proto.String(s.Ip),
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Port: proto.Uint32(uint32(s.Port)),
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PublicUrl: proto.String(s.PublicUrl),
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MaxVolumeCount: proto.Uint32(uint32(maxVolumeCount)),
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MaxFileKey: proto.Uint64(maxFileKey),
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DataCenter: proto.String(s.dataCenter),
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Rack: proto.String(s.rack),
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Volumes: volumeMessages,
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}
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data, err := proto.Marshal(joinMessage)
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if err != nil {
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return "", "", err
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}
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joinUrl := "http://" + masterNode + "/dir/join"
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glog.V(4).Infof("Connecting to %s ...", joinUrl)
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jsonBlob, err := util.PostBytes(joinUrl, data)
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if err != nil {
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s.masterNodes.reset()
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return "", "", err
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}
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var ret operation.JoinResult
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if err := json.Unmarshal(jsonBlob, &ret); err != nil {
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glog.V(0).Infof("Failed to join %s with response: %s", joinUrl, string(jsonBlob))
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s.masterNodes.reset()
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return masterNode, "", err
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}
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if ret.Error != "" {
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s.masterNodes.reset()
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return masterNode, "", errors.New(ret.Error)
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}
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s.volumeSizeLimit = ret.VolumeSizeLimit
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secretKey = security.Secret(ret.SecretKey)
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s.connected = true
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return
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}
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func (s *Store) Close() {
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for _, location := range s.Locations {
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for _, v := range location.volumes {
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v.Close()
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}
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}
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}
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func (s *Store) Write(i VolumeId, n *Needle) (size uint32, err error) {
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if v := s.findVolume(i); v != nil {
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if v.readOnly {
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err = fmt.Errorf("Volume %d is read only", i)
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return
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}
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if MaxPossibleVolumeSize >= v.ContentSize()+uint64(size) {
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size, err = v.write(n)
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} else {
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err = fmt.Errorf("Volume Size Limit %d Exceeded! Current size is %d", s.volumeSizeLimit, v.ContentSize())
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}
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if s.volumeSizeLimit < v.ContentSize()+3*uint64(size) {
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glog.V(0).Infoln("volume", i, "size", v.ContentSize(), "will exceed limit", s.volumeSizeLimit)
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if _, _, e := s.SendHeartbeatToMaster(); e != nil {
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glog.V(0).Infoln("error when reporting size:", e)
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}
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}
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return
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}
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glog.V(0).Infoln("volume", i, "not found!")
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err = fmt.Errorf("Volume %d not found!", i)
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return
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}
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func (s *Store) Delete(i VolumeId, n *Needle) (uint32, error) {
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if v := s.findVolume(i); v != nil && !v.readOnly {
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return v.delete(n)
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}
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return 0, nil
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}
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func (s *Store) ReadVolumeNeedle(i VolumeId, n *Needle) (int, error) {
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if v := s.findVolume(i); v != nil {
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return v.readNeedle(n)
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}
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return 0, fmt.Errorf("Volume %v not found!", i)
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}
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func (s *Store) GetVolume(i VolumeId) *Volume {
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return s.findVolume(i)
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}
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func (s *Store) HasVolume(i VolumeId) bool {
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v := s.findVolume(i)
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return v != nil
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}
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