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hybrid.go
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hybrid.go
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/*
* Copyright 2020 The Dragonfly Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package hybrid
import (
"encoding/json"
"fmt"
"io"
"os"
"path"
"strings"
"sync"
"time"
cdnerrors "d7y.io/dragonfly/v2/cdnsystem/errors"
"d7y.io/dragonfly/v2/cdnsystem/storedriver"
"d7y.io/dragonfly/v2/cdnsystem/storedriver/local"
"d7y.io/dragonfly/v2/cdnsystem/supervisor"
"d7y.io/dragonfly/v2/cdnsystem/supervisor/cdn/storage"
"d7y.io/dragonfly/v2/cdnsystem/supervisor/gc"
"d7y.io/dragonfly/v2/cdnsystem/types"
logger "d7y.io/dragonfly/v2/internal/dflog"
"d7y.io/dragonfly/v2/pkg/synclock"
"d7y.io/dragonfly/v2/pkg/unit"
"d7y.io/dragonfly/v2/pkg/util/fileutils"
"github.com/pkg/errors"
"go.uber.org/atomic"
)
const StorageMode = storage.HybridStorageMode
const secureLevel = 500 * unit.MB
var _ storage.Manager = (*hybridStorageMgr)(nil)
var _ gc.Executor = (*hybridStorageMgr)(nil)
func init() {
storage.Register(StorageMode, newStorageManager)
}
// NewStorageManager performs initialization for storage manager and return a storage Manager.
func newStorageManager(cfg *storage.Config) (storage.Manager, error) {
if len(cfg.DriverConfigs) != 2 {
return nil, fmt.Errorf("disk storage manager should have two driver, cfg's driver number is wrong : %v", cfg)
}
diskDriver, ok := storedriver.Get(local.DiskDriverName)
if !ok {
return nil, fmt.Errorf("can not find disk driver for hybrid storage manager, config is %v", cfg)
}
memoryDriver, ok := storedriver.Get(local.MemoryDriverName)
if !ok {
return nil, fmt.Errorf("can not find memory driver for hybrid storage manager, config %v", cfg)
}
storageMgr := &hybridStorageMgr{
cfg: cfg,
memoryDriver: memoryDriver,
diskDriver: diskDriver,
hasShm: true,
shmSwitch: newShmSwitch(),
}
gc.Register("hybridStorage", cfg.GCInitialDelay, cfg.GCInterval, storageMgr)
return storageMgr, nil
}
func (h *hybridStorageMgr) Initialize(taskMgr supervisor.SeedTaskMgr) {
h.taskMgr = taskMgr
diskGcConfig := h.cfg.DriverConfigs[local.DiskDriverName].GCConfig
if diskGcConfig == nil {
diskGcConfig = h.getDiskDefaultGcConfig()
logger.GcLogger.With("type", "hybrid").Warnf("disk gc config is nil, use default gcConfig: %v", diskGcConfig)
}
h.diskDriverCleaner, _ = storage.NewStorageCleaner(diskGcConfig, h.diskDriver, h, taskMgr)
memoryGcConfig := h.cfg.DriverConfigs[local.MemoryDriverName].GCConfig
if memoryGcConfig == nil {
memoryGcConfig = h.getMemoryDefaultGcConfig()
logger.GcLogger.With("type", "hybrid").Warnf("memory gc config is nil, use default gcConfig: %v", diskGcConfig)
}
h.memoryDriverCleaner, _ = storage.NewStorageCleaner(memoryGcConfig, h.memoryDriver, h, taskMgr)
logger.GcLogger.With("type", "hybrid").Info("success initialize hybrid cleaners")
}
func (h *hybridStorageMgr) getDiskDefaultGcConfig() *storage.GCConfig {
totalSpace, err := h.diskDriver.GetTotalSpace()
if err != nil {
logger.GcLogger.With("type", "hybrid").Errorf("failed to get total space of disk: %v", err)
}
yongGcThreshold := 200 * unit.GB
if totalSpace > 0 && totalSpace/4 < yongGcThreshold {
yongGcThreshold = totalSpace / 4
}
return &storage.GCConfig{
YoungGCThreshold: yongGcThreshold,
FullGCThreshold: 25 * unit.GB,
IntervalThreshold: 2 * time.Hour,
CleanRatio: 1,
}
}
func (h *hybridStorageMgr) getMemoryDefaultGcConfig() *storage.GCConfig {
// determine whether the shared cache can be used
diff := unit.Bytes(0)
totalSpace, err := h.memoryDriver.GetTotalSpace()
if err != nil {
logger.GcLogger.With("type", "hybrid").Errorf("failed to get total space of memory: %v", err)
}
if totalSpace < 72*unit.GB {
diff = 72*unit.GB - totalSpace
}
if diff >= totalSpace {
h.hasShm = false
}
return &storage.GCConfig{
YoungGCThreshold: 10*unit.GB + diff,
FullGCThreshold: 2*unit.GB + diff,
CleanRatio: 3,
IntervalThreshold: 2 * time.Hour,
}
}
type hybridStorageMgr struct {
cfg *storage.Config
memoryDriver storedriver.Driver
diskDriver storedriver.Driver
diskDriverCleaner *storage.Cleaner
memoryDriverCleaner *storage.Cleaner
taskMgr supervisor.SeedTaskMgr
shmSwitch *shmSwitch
hasShm bool
}
func (h *hybridStorageMgr) GC() error {
logger.GcLogger.With("type", "hybrid").Info("start the hybrid storage gc job")
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
gcTaskIDs, err := h.diskDriverCleaner.GC("hybrid", false)
if err != nil {
logger.GcLogger.With("type", "hybrid").Error("gc disk: failed to get gcTaskIds")
}
realGCCount := h.gcTasks(gcTaskIDs, true)
logger.GcLogger.With("type", "hybrid").Infof("at most %d tasks can be cleaned up from disk, actual gc %d tasks", len(gcTaskIDs), realGCCount)
}()
if h.hasShm {
wg.Add(1)
go func() {
defer wg.Done()
gcTaskIDs, err := h.memoryDriverCleaner.GC("hybrid", false)
logger.GcLogger.With("type", "hybrid").Infof("at most %d tasks can be cleaned up from memory", len(gcTaskIDs))
if err != nil {
logger.GcLogger.With("type", "hybrid").Error("gc memory: failed to get gcTaskIds")
}
h.gcTasks(gcTaskIDs, false)
}()
}
wg.Wait()
return nil
}
func (h *hybridStorageMgr) gcTasks(gcTaskIDs []string, isDisk bool) int {
var realGCCount int
for _, taskID := range gcTaskIDs {
synclock.Lock(taskID, false)
// try to ensure the taskID is not using again
if _, exist := h.taskMgr.Exist(taskID); exist {
synclock.UnLock(taskID, false)
continue
}
realGCCount++
if isDisk {
if err := h.deleteDiskFiles(taskID); err != nil {
logger.GcLogger.With("type", "hybrid").Errorf("gc disk: failed to delete disk files with taskID(%s): %v", taskID, err)
synclock.UnLock(taskID, false)
continue
}
} else {
if err := h.deleteMemoryFiles(taskID); err != nil {
logger.GcLogger.With("type", "hybrid").Errorf("gc memory: failed to delete memory files with taskID(%s): %v", taskID, err)
synclock.UnLock(taskID, false)
continue
}
}
synclock.UnLock(taskID, false)
}
return realGCCount
}
func (h *hybridStorageMgr) WriteDownloadFile(taskID string, offset int64, len int64, data io.Reader) error {
raw := storage.GetDownloadRaw(taskID)
raw.Offset = offset
raw.Length = len
return h.diskDriver.Put(raw, data)
}
func (h *hybridStorageMgr) DeleteTask(taskID string) error {
return h.deleteTaskFiles(taskID, true, true)
}
func (h *hybridStorageMgr) ReadDownloadFile(taskID string) (io.ReadCloser, error) {
return h.diskDriver.Get(storage.GetDownloadRaw(taskID))
}
func (h *hybridStorageMgr) ReadPieceMetaRecords(taskID string) ([]*storage.PieceMetaRecord, error) {
readBytes, err := h.diskDriver.GetBytes(storage.GetPieceMetaDataRaw(taskID))
if err != nil {
return nil, err
}
pieceMetaRecords := strings.Split(strings.TrimSpace(string(readBytes)), "\n")
var result = make([]*storage.PieceMetaRecord, 0, len(pieceMetaRecords))
for _, pieceStr := range pieceMetaRecords {
record, err := storage.ParsePieceMetaRecord(pieceStr)
if err != nil {
return nil, errors.Wrapf(err, "get piece meta record: %v", pieceStr)
}
result = append(result, record)
}
return result, nil
}
func (h *hybridStorageMgr) ReadFileMetaData(taskID string) (*storage.FileMetaData, error) {
readBytes, err := h.diskDriver.GetBytes(storage.GetTaskMetaDataRaw(taskID))
if err != nil {
return nil, errors.Wrapf(err, "get metadata bytes")
}
metaData := &storage.FileMetaData{}
if err := json.Unmarshal(readBytes, metaData); err != nil {
return nil, errors.Wrapf(err, "unmarshal metadata bytes")
}
return metaData, nil
}
func (h *hybridStorageMgr) AppendPieceMetaData(taskID string, record *storage.PieceMetaRecord) error {
return h.diskDriver.PutBytes(storage.GetAppendPieceMetaDataRaw(taskID), []byte(record.String()+"\n"))
}
func (h *hybridStorageMgr) WriteFileMetaData(taskID string, metaData *storage.FileMetaData) error {
data, err := json.Marshal(metaData)
if err != nil {
return errors.Wrapf(err, "marshal metadata")
}
return h.diskDriver.PutBytes(storage.GetTaskMetaDataRaw(taskID), data)
}
func (h *hybridStorageMgr) WritePieceMetaRecords(taskID string, records []*storage.PieceMetaRecord) error {
recordStrings := make([]string, 0, len(records))
for i := range records {
recordStrings = append(recordStrings, records[i].String())
}
return h.diskDriver.PutBytes(storage.GetPieceMetaDataRaw(taskID), []byte(strings.Join(recordStrings, "\n")))
}
func (h *hybridStorageMgr) CreateUploadLink(taskID string) error {
// create a soft link from the upload file to the download file
if err := fileutils.SymbolicLink(h.diskDriver.GetPath(storage.GetDownloadRaw(taskID)),
h.diskDriver.GetPath(storage.GetUploadRaw(taskID))); err != nil {
return err
}
return nil
}
func (h *hybridStorageMgr) ResetRepo(task *types.SeedTask) error {
if err := h.deleteTaskFiles(task.TaskID, false, true); err != nil {
logger.WithTaskID(task.TaskID).Errorf("reset repo: failed to delete task files: %v", err)
}
// 判断是否有足够空间存放
shmPath, err := h.tryShmSpace(task.URL, task.TaskID, task.SourceFileLength)
if err == nil {
return fileutils.SymbolicLink(shmPath, h.diskDriver.GetPath(storage.GetDownloadRaw(task.TaskID)))
}
return nil
}
func (h *hybridStorageMgr) GetDownloadPath(rawFunc *storedriver.Raw) string {
return h.diskDriver.GetPath(rawFunc)
}
func (h *hybridStorageMgr) StatDownloadFile(taskID string) (*storedriver.StorageInfo, error) {
return h.diskDriver.Stat(storage.GetDownloadRaw(taskID))
}
func (h *hybridStorageMgr) TryFreeSpace(fileLength int64) (bool, error) {
diskFreeSpace, err := h.diskDriver.GetFreeSpace()
if err != nil {
return false, err
}
if diskFreeSpace > 500*unit.GB && diskFreeSpace.ToNumber() > fileLength {
return true, nil
}
remainder := atomic.NewInt64(0)
r := &storedriver.Raw{
WalkFn: func(filePath string, info os.FileInfo, err error) error {
if fileutils.IsRegular(filePath) {
taskID := strings.Split(path.Base(filePath), ".")[0]
task, exist := h.taskMgr.Exist(taskID)
if exist {
var totalLen int64 = 0
if task.CdnFileLength > 0 {
totalLen = task.CdnFileLength
} else {
totalLen = task.SourceFileLength
}
if totalLen > 0 {
remainder.Add(totalLen - info.Size())
}
} else {
logger.Warnf("failed to get task: %s", taskID)
}
}
return nil
},
}
h.diskDriver.Walk(r)
enoughSpace := diskFreeSpace.ToNumber()-remainder.Load() > fileLength
if !enoughSpace {
h.diskDriverCleaner.GC("hybrid", true)
remainder.Store(0)
h.diskDriver.Walk(r)
diskFreeSpace, err = h.diskDriver.GetFreeSpace()
if err != nil {
return false, err
}
enoughSpace = diskFreeSpace.ToNumber()-remainder.Load() > fileLength
}
if !enoughSpace {
return false, nil
}
return true, nil
}
func (h *hybridStorageMgr) deleteDiskFiles(taskID string) error {
return h.deleteTaskFiles(taskID, true, true)
}
func (h *hybridStorageMgr) deleteMemoryFiles(taskID string) error {
return h.deleteTaskFiles(taskID, true, false)
}
func (h *hybridStorageMgr) deleteTaskFiles(taskID string, deleteUploadPath bool, deleteHardLink bool) error {
// delete task file data
if err := h.diskDriver.Remove(storage.GetDownloadRaw(taskID)); err != nil && !cdnerrors.IsFileNotExist(err) {
return err
}
// delete memory file
if err := h.memoryDriver.Remove(storage.GetDownloadRaw(taskID)); err != nil && !cdnerrors.IsFileNotExist(err) {
return err
}
if deleteUploadPath {
if err := h.diskDriver.Remove(storage.GetUploadRaw(taskID)); err != nil && !cdnerrors.IsFileNotExist(err) {
return err
}
}
exists := h.diskDriver.Exits(getHardLinkRaw(taskID))
if !deleteHardLink && exists {
if err := h.diskDriver.MoveFile(h.diskDriver.GetPath(getHardLinkRaw(taskID)), h.diskDriver.GetPath(storage.GetDownloadRaw(taskID))); err != nil {
return err
}
} else {
if err := h.diskDriver.Remove(getHardLinkRaw(taskID)); err != nil && !cdnerrors.IsFileNotExist(err) {
return err
}
// deleteTaskFiles delete files associated with taskID
if err := h.diskDriver.Remove(storage.GetTaskMetaDataRaw(taskID)); err != nil && !cdnerrors.IsFileNotExist(err) {
return err
}
// delete piece meta data
if err := h.diskDriver.Remove(storage.GetPieceMetaDataRaw(taskID)); err != nil && !cdnerrors.IsFileNotExist(err) {
return err
}
}
// try to clean the parent bucket
if err := h.diskDriver.Remove(storage.GetParentRaw(taskID)); err != nil &&
!cdnerrors.IsFileNotExist(err) {
logger.WithTaskID(taskID).Warnf("failed to remove parent bucket: %v", err)
}
return nil
}
func (h *hybridStorageMgr) tryShmSpace(url, taskID string, fileLength int64) (string, error) {
if h.shmSwitch.check(url, fileLength) && h.hasShm {
remainder := atomic.NewInt64(0)
h.memoryDriver.Walk(&storedriver.Raw{
WalkFn: func(filePath string, info os.FileInfo, err error) error {
if fileutils.IsRegular(filePath) {
taskID := strings.Split(path.Base(filePath), ".")[0]
task, exist := h.taskMgr.Exist(taskID)
if exist {
var totalLen int64 = 0
if task.CdnFileLength > 0 {
totalLen = task.CdnFileLength
} else {
totalLen = task.SourceFileLength
}
if totalLen > 0 {
remainder.Add(totalLen - info.Size())
}
} else {
logger.Warnf("failed to get task: %s", taskID)
}
}
return nil
},
})
canUseShm := h.getMemoryUsableSpace()-unit.Bytes(remainder.Load())-secureLevel >= unit.Bytes(
fileLength)
if !canUseShm {
// 如果剩余空间过小,则强制执行一次fullgc后在检查是否满足
h.memoryDriverCleaner.GC("hybrid", true)
canUseShm = h.getMemoryUsableSpace()-unit.Bytes(remainder.Load())-secureLevel >= unit.Bytes(
fileLength)
}
if canUseShm { // 创建shm
raw := &storedriver.Raw{
Key: taskID,
}
return h.memoryDriver.GetPath(raw), nil
}
return "", fmt.Errorf("not enough free space left")
}
return "", fmt.Errorf("shared memory is not allowed")
}
func (h *hybridStorageMgr) getMemoryUsableSpace() unit.Bytes {
totalSize, freeSize, err := h.memoryDriver.GetTotalAndFreeSpace()
if err != nil {
logger.GcLogger.With("type", "hybrid").Errorf("failed to get total and free space of memory: %v", err)
return 0
}
// 如果内存总容量大于等于 72G,则返回内存的剩余可用空间
threshold := 72 * unit.GB
if totalSize >= threshold {
return freeSize
}
// 如果总容量小于72G, 如40G容量,则可用空间为 当前可用空间 - 32G: 最大可用空间为8G,50G容量,则可用空间为 当前可用空间 - 22G:最大可用空间为28G
usableSpace := freeSize - (72*unit.GB - totalSize)
if usableSpace > 0 {
return usableSpace
}
return 0
}
func getHardLinkRaw(taskID string) *storedriver.Raw {
raw := storage.GetDownloadRaw(taskID)
raw.Key = raw.Key + ".hard"
return raw
}