package storage import ( "fmt" "io/ioutil" "os" "path/filepath" "strings" "sync" "time" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/stats" "github.com/chrislusf/seaweedfs/weed/storage/erasure_coding" "github.com/chrislusf/seaweedfs/weed/storage/needle" "github.com/chrislusf/seaweedfs/weed/util" ) type DiskLocation struct { Directory string IdxDirectory string MaxVolumeCount int OriginalMaxVolumeCount int MinFreeSpacePercent float32 volumes map[needle.VolumeId]*Volume volumesLock sync.RWMutex // erasure coding ecVolumes map[needle.VolumeId]*erasure_coding.EcVolume ecVolumesLock sync.RWMutex isDiskSpaceLow bool } func NewDiskLocation(dir string, maxVolumeCount int, minFreeSpacePercent float32, idxDir string) *DiskLocation { dir = util.ResolvePath(dir) if idxDir == "" { idxDir = dir } else { idxDir = util.ResolvePath(idxDir) } location := &DiskLocation{ Directory: dir, IdxDirectory: idxDir, MaxVolumeCount: maxVolumeCount, OriginalMaxVolumeCount: maxVolumeCount, MinFreeSpacePercent: minFreeSpacePercent, } location.volumes = make(map[needle.VolumeId]*Volume) location.ecVolumes = make(map[needle.VolumeId]*erasure_coding.EcVolume) go location.CheckDiskSpace() return location } func volumeIdFromFileName(filename string) (needle.VolumeId, string, error) { if isValidVolume(filename) { base := filename[:len(filename)-4] collection, volumeId, err := parseCollectionVolumeId(base) return volumeId, collection, err } return 0, "", fmt.Errorf("file is not a volume: %s", filename) } func parseCollectionVolumeId(base string) (collection string, vid needle.VolumeId, err error) { i := strings.LastIndex(base, "_") if i > 0 { collection, base = base[0:i], base[i+1:] } vol, err := needle.NewVolumeId(base) return collection, vol, err } func isValidVolume(basename string) bool { return strings.HasSuffix(basename, ".idx") || strings.HasSuffix(basename, ".vif") } func getValidVolumeName(basename string) string { if isValidVolume(basename) { return basename[:len(basename)-4] } return "" } func (l *DiskLocation) loadExistingVolume(fileInfo os.FileInfo, needleMapKind NeedleMapKind) bool { basename := fileInfo.Name() if fileInfo.IsDir() { return false } volumeName := getValidVolumeName(basename) if volumeName == "" { return false } // check for incomplete volume noteFile := l.Directory + "/" + volumeName + ".note" if util.FileExists(noteFile) { note, _ := ioutil.ReadFile(noteFile) glog.Warningf("volume %s was not completed: %s", volumeName, string(note)) removeVolumeFiles(l.Directory + "/" + volumeName) removeVolumeFiles(l.IdxDirectory + "/" + volumeName) return false } // parse out collection, volume id vid, collection, err := volumeIdFromFileName(basename) if err != nil { glog.Warningf("get volume id failed, %s, err : %s", volumeName, err) return false } // avoid loading one volume more than once l.volumesLock.RLock() _, found := l.volumes[vid] l.volumesLock.RUnlock() if found { glog.V(1).Infof("loaded volume, %v", vid) return true } // load the volume v, e := NewVolume(l.Directory, l.IdxDirectory, collection, vid, needleMapKind, nil, nil, 0, 0) if e != nil { glog.V(0).Infof("new volume %s error %s", volumeName, e) return false } l.SetVolume(vid, v) size, _, _ := v.FileStat() glog.V(0).Infof("data file %s, replicaPlacement=%s v=%d size=%d ttl=%s", l.Directory+"/"+volumeName+".dat", v.ReplicaPlacement, v.Version(), size, v.Ttl.String()) return true } func (l *DiskLocation) concurrentLoadingVolumes(needleMapKind NeedleMapKind, concurrency int) { task_queue := make(chan os.FileInfo, 10*concurrency) go func() { foundVolumeNames := make(map[string]bool) if fileInfos, err := ioutil.ReadDir(l.Directory); err == nil { for _, fi := range fileInfos { volumeName := getValidVolumeName(fi.Name()) if volumeName == "" { continue } if _, found := foundVolumeNames[volumeName]; !found { foundVolumeNames[volumeName] = true task_queue <- fi } } } close(task_queue) }() var wg sync.WaitGroup for workerNum := 0; workerNum < concurrency; workerNum++ { wg.Add(1) go func() { defer wg.Done() for fi := range task_queue { _ = l.loadExistingVolume(fi, needleMapKind) } }() } wg.Wait() } func (l *DiskLocation) loadExistingVolumes(needleMapKind NeedleMapKind) { l.concurrentLoadingVolumes(needleMapKind, 10) glog.V(0).Infof("Store started on dir: %s with %d volumes max %d", l.Directory, len(l.volumes), l.MaxVolumeCount) l.loadAllEcShards() glog.V(0).Infof("Store started on dir: %s with %d ec shards", l.Directory, len(l.ecVolumes)) } func (l *DiskLocation) DeleteCollectionFromDiskLocation(collection string) (e error) { l.volumesLock.Lock() delVolsMap := l.unmountVolumeByCollection(collection) l.volumesLock.Unlock() l.ecVolumesLock.Lock() delEcVolsMap := l.unmountEcVolumeByCollection(collection) l.ecVolumesLock.Unlock() errChain := make(chan error, 2) var wg sync.WaitGroup wg.Add(2) go func() { for _, v := range delVolsMap { if err := v.Destroy(); err != nil { errChain <- err } } wg.Done() }() go func() { for _, v := range delEcVolsMap { v.Destroy() } wg.Done() }() go func() { wg.Wait() close(errChain) }() errBuilder := strings.Builder{} for err := range errChain { errBuilder.WriteString(err.Error()) errBuilder.WriteString("; ") } if errBuilder.Len() > 0 { e = fmt.Errorf(errBuilder.String()) } return } func (l *DiskLocation) deleteVolumeById(vid needle.VolumeId) (found bool, e error) { v, ok := l.volumes[vid] if !ok { return } e = v.Destroy() if e != nil { return } found = true delete(l.volumes, vid) return } func (l *DiskLocation) LoadVolume(vid needle.VolumeId, needleMapKind NeedleMapKind) bool { if fileInfo, found := l.LocateVolume(vid); found { return l.loadExistingVolume(fileInfo, needleMapKind) } return false } func (l *DiskLocation) DeleteVolume(vid needle.VolumeId) error { l.volumesLock.Lock() defer l.volumesLock.Unlock() _, ok := l.volumes[vid] if !ok { return fmt.Errorf("Volume not found, VolumeId: %d", vid) } _, err := l.deleteVolumeById(vid) return err } func (l *DiskLocation) UnloadVolume(vid needle.VolumeId) error { l.volumesLock.Lock() defer l.volumesLock.Unlock() v, ok := l.volumes[vid] if !ok { return fmt.Errorf("Volume not loaded, VolumeId: %d", vid) } v.Close() delete(l.volumes, vid) return nil } func (l *DiskLocation) unmountVolumeByCollection(collectionName string) map[needle.VolumeId]*Volume { deltaVols := make(map[needle.VolumeId]*Volume, 0) for k, v := range l.volumes { if v.Collection == collectionName && !v.isCompacting { deltaVols[k] = v } } for k := range deltaVols { delete(l.volumes, k) } return deltaVols } func (l *DiskLocation) SetVolume(vid needle.VolumeId, volume *Volume) { l.volumesLock.Lock() defer l.volumesLock.Unlock() l.volumes[vid] = volume volume.location = l } func (l *DiskLocation) FindVolume(vid needle.VolumeId) (*Volume, bool) { l.volumesLock.RLock() defer l.volumesLock.RUnlock() v, ok := l.volumes[vid] return v, ok } func (l *DiskLocation) VolumesLen() int { l.volumesLock.RLock() defer l.volumesLock.RUnlock() return len(l.volumes) } func (l *DiskLocation) Close() { l.volumesLock.Lock() for _, v := range l.volumes { v.Close() } l.volumesLock.Unlock() l.ecVolumesLock.Lock() for _, ecVolume := range l.ecVolumes { ecVolume.Close() } l.ecVolumesLock.Unlock() return } func (l *DiskLocation) LocateVolume(vid needle.VolumeId) (os.FileInfo, bool) { if fileInfos, err := ioutil.ReadDir(l.Directory); err == nil { for _, fileInfo := range fileInfos { volId, _, err := volumeIdFromFileName(fileInfo.Name()) if vid == volId && err == nil { return fileInfo, true } } } return nil, false } func (l *DiskLocation) UnUsedSpace(volumeSizeLimit uint64) (unUsedSpace uint64) { l.volumesLock.RLock() defer l.volumesLock.RUnlock() for _, vol := range l.volumes { if vol.IsReadOnly() { continue } datSize, idxSize, _ := vol.FileStat() unUsedSpace += volumeSizeLimit - (datSize + idxSize) } return } func (l *DiskLocation) CheckDiskSpace() { for { if dir, e := filepath.Abs(l.Directory); e == nil { s := stats.NewDiskStatus(dir) stats.VolumeServerResourceGauge.WithLabelValues(l.Directory, "all").Set(float64(s.All)) stats.VolumeServerResourceGauge.WithLabelValues(l.Directory, "used").Set(float64(s.Used)) stats.VolumeServerResourceGauge.WithLabelValues(l.Directory, "free").Set(float64(s.Free)) if (s.PercentFree < l.MinFreeSpacePercent) != l.isDiskSpaceLow { l.isDiskSpaceLow = !l.isDiskSpaceLow } if l.isDiskSpaceLow { glog.V(0).Infof("dir %s freePercent %.2f%% < min %.2f%%, isLowDiskSpace: %v", dir, s.PercentFree, l.MinFreeSpacePercent, l.isDiskSpaceLow) } else { glog.V(4).Infof("dir %s freePercent %.2f%% < min %.2f%%, isLowDiskSpace: %v", dir, s.PercentFree, l.MinFreeSpacePercent, l.isDiskSpaceLow) } } time.Sleep(time.Minute) } }