seaweedfs/weed/shell/command_volume_fsck.go

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package shell
import (
"context"
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"flag"
"fmt"
"io"
"io/ioutil"
"math"
"os"
"path/filepath"
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"sync"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
"github.com/chrislusf/seaweedfs/weed/storage/types"
"github.com/chrislusf/seaweedfs/weed/util"
)
func init() {
Commands = append(Commands, &commandVolumeFsck{})
}
type commandVolumeFsck struct {
env *CommandEnv
}
func (c *commandVolumeFsck) Name() string {
return "volume.fsck"
}
func (c *commandVolumeFsck) Help() string {
return `check all volumes to find entries not used by the filer
Important assumption!!!
the system is all used by one filer.
This command works this way:
1. collect all file ids from all volumes, as set A
2. collect all file ids from the filer, as set B
3. find out the set A subtract B
`
}
func (c *commandVolumeFsck) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
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fsckCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
verbose := fsckCommand.Bool("v", false, "verbose mode")
applyPurging := fsckCommand.Bool("reallyDeleteFromVolume", false, "<expert only> delete data not referenced by the filer")
if err = fsckCommand.Parse(args); err != nil {
return nil
}
c.env = commandEnv
// create a temp folder
tempFolder, err := ioutil.TempDir("", "sw_fsck")
if err != nil {
return fmt.Errorf("failed to create temp folder: %v", err)
}
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if *verbose {
fmt.Fprintf(writer, "working directory: %s\n", tempFolder)
}
defer os.RemoveAll(tempFolder)
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// collect all volume id locations
volumeIdToServer, err := c.collectVolumeIds(*verbose, writer)
if err != nil {
return fmt.Errorf("failed to collect all volume locations: %v", err)
}
// collect each volume file ids
for volumeId, vinfo := range volumeIdToServer {
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err = c.collectOneVolumeFileIds(tempFolder, volumeId, vinfo, *verbose, writer)
if err != nil {
return fmt.Errorf("failed to collect file ids from volume %d on %s: %v", volumeId, vinfo.server, err)
}
}
// collect all filer file ids
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if err = c.collectFilerFileIds(tempFolder, volumeIdToServer, *verbose, writer); err != nil {
return fmt.Errorf("failed to collect file ids from filer: %v", err)
}
// volume file ids substract filer file ids
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var totalInUseCount, totalOrphanChunkCount, totalOrphanDataSize uint64
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for volumeId, vinfo := range volumeIdToServer {
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inUseCount, orphanFileIds, orphanDataSize, checkErr := c.oneVolumeFileIdsSubtractFilerFileIds(tempFolder, volumeId, writer, *verbose)
if checkErr != nil {
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return fmt.Errorf("failed to collect file ids from volume %d on %s: %v", volumeId, vinfo.server, checkErr)
}
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totalInUseCount += inUseCount
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totalOrphanChunkCount += uint64(len(orphanFileIds))
totalOrphanDataSize += orphanDataSize
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if *applyPurging && len(orphanFileIds) > 0 {
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if vinfo.isEcVolume {
fmt.Fprintf(writer, "Skip purging for Erasure Coded volumes.\n")
}
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if err = c.purgeFileIdsForOneVolume(volumeId, orphanFileIds, writer); err != nil {
return fmt.Errorf("purge for volume %d: %v\n", volumeId, err)
}
}
}
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if totalOrphanChunkCount == 0 {
fmt.Fprintf(writer, "no orphan data\n")
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return nil
}
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if !*applyPurging {
pct := float64(totalOrphanChunkCount*100) / (float64(totalOrphanChunkCount + totalInUseCount))
fmt.Fprintf(writer, "\nTotal\t\tentries:%d\torphan:%d\t%.2f%%\t%dB\n",
totalOrphanChunkCount+totalInUseCount, totalOrphanChunkCount, pct, totalOrphanDataSize)
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fmt.Fprintf(writer, "This could be normal if multiple filers or no filers are used.\n")
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}
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return nil
}
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func (c *commandVolumeFsck) collectOneVolumeFileIds(tempFolder string, volumeId uint32, vinfo VInfo, verbose bool, writer io.Writer) error {
if verbose {
fmt.Fprintf(writer, "collecting volume %d file ids from %s ...\n", volumeId, vinfo.server)
}
return operation.WithVolumeServerClient(vinfo.server, c.env.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
copyFileClient, err := volumeServerClient.CopyFile(context.Background(), &volume_server_pb.CopyFileRequest{
VolumeId: volumeId,
Ext: ".idx",
CompactionRevision: math.MaxUint32,
StopOffset: math.MaxInt64,
Collection: vinfo.collection,
IsEcVolume: vinfo.isEcVolume,
IgnoreSourceFileNotFound: false,
})
if err != nil {
return fmt.Errorf("failed to start copying volume %d.idx: %v", volumeId, err)
}
err = writeToFile(copyFileClient, getVolumeFileIdFile(tempFolder, volumeId))
if err != nil {
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return fmt.Errorf("failed to copy %d.idx from %s: %v", volumeId, vinfo.server, err)
}
return nil
})
}
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func (c *commandVolumeFsck) collectFilerFileIds(tempFolder string, volumeIdToServer map[uint32]VInfo, verbose bool, writer io.Writer) error {
if verbose {
fmt.Fprintf(writer, "collecting file ids from filer ...\n")
}
files := make(map[uint32]*os.File)
for vid := range volumeIdToServer {
dst, openErr := os.OpenFile(getFilerFileIdFile(tempFolder, vid), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if openErr != nil {
return fmt.Errorf("failed to create file %s: %v", getFilerFileIdFile(tempFolder, vid), openErr)
}
files[vid] = dst
}
defer func() {
for _, f := range files {
f.Close()
}
}()
type Item struct {
vid uint32
fileKey uint64
}
return doTraverseBfsAndSaving(c.env, nil, "/", false, func(outputChan chan interface{}) {
buffer := make([]byte, 8)
for item := range outputChan {
i := item.(*Item)
util.Uint64toBytes(buffer, i.fileKey)
files[i.vid].Write(buffer)
}
}, func(entry *filer_pb.FullEntry, outputChan chan interface{}) (err error) {
for _, chunk := range entry.Entry.Chunks {
outputChan <- &Item{
vid: chunk.Fid.VolumeId,
fileKey: chunk.Fid.FileKey,
}
}
return nil
})
}
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func (c *commandVolumeFsck) oneVolumeFileIdsSubtractFilerFileIds(tempFolder string, volumeId uint32, writer io.Writer, verbose bool) (inUseCount uint64, orphanFileIds []string, orphanDataSize uint64, err error) {
db := needle_map.NewMemDb()
defer db.Close()
if err = db.LoadFromIdx(getVolumeFileIdFile(tempFolder, volumeId)); err != nil {
return
}
filerFileIdsData, err := ioutil.ReadFile(getFilerFileIdFile(tempFolder, volumeId))
if err != nil {
return
}
dataLen := len(filerFileIdsData)
if dataLen%8 != 0 {
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return 0, nil, 0, fmt.Errorf("filer data is corrupted")
}
for i := 0; i < len(filerFileIdsData); i += 8 {
fileKey := util.BytesToUint64(filerFileIdsData[i : i+8])
db.Delete(types.NeedleId(fileKey))
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inUseCount++
}
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var orphanFileCount uint64
db.AscendingVisit(func(n needle_map.NeedleValue) error {
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// fmt.Printf("%d,%x\n", volumeId, n.Key)
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orphanFileIds = append(orphanFileIds, fmt.Sprintf("%d,%s", volumeId, n.Key.String()))
orphanFileCount++
orphanDataSize += uint64(n.Size)
return nil
})
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if orphanFileCount > 0 {
pct := float64(orphanFileCount*100) / (float64(orphanFileCount + inUseCount))
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fmt.Fprintf(writer, "volume:%d\tentries:%d\torphan:%d\t%.2f%%\t%dB\n",
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volumeId, orphanFileCount+inUseCount, orphanFileCount, pct, orphanDataSize)
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}
return
}
type VInfo struct {
server string
collection string
isEcVolume bool
}
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func (c *commandVolumeFsck) collectVolumeIds(verbose bool, writer io.Writer) (volumeIdToServer map[uint32]VInfo, err error) {
if verbose {
fmt.Fprintf(writer, "collecting volume id and locations from master ...\n")
}
volumeIdToServer = make(map[uint32]VInfo)
var resp *master_pb.VolumeListResponse
err = c.env.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
resp, err = client.VolumeList(context.Background(), &master_pb.VolumeListRequest{})
return err
})
if err != nil {
return
}
eachDataNode(resp.TopologyInfo, func(dc string, rack RackId, t *master_pb.DataNodeInfo) {
for _, vi := range t.VolumeInfos {
volumeIdToServer[vi.Id] = VInfo{
server: t.Id,
collection: vi.Collection,
isEcVolume: false,
}
}
for _, ecShardInfo := range t.EcShardInfos {
volumeIdToServer[ecShardInfo.Id] = VInfo{
server: t.Id,
collection: ecShardInfo.Collection,
isEcVolume: true,
}
}
})
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if verbose {
fmt.Fprintf(writer, "collected %d volumes and locations.\n", len(volumeIdToServer))
}
return
}
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func (c *commandVolumeFsck) purgeFileIdsForOneVolume(volumeId uint32, fileIds []string, writer io.Writer) (err error) {
fmt.Fprintf(writer, "purging orphan data for volume %d...\n", volumeId)
locations, found := c.env.MasterClient.GetLocations(volumeId)
if !found {
return fmt.Errorf("failed to find volume %d locations", volumeId)
}
resultChan := make(chan []*volume_server_pb.DeleteResult, len(locations))
var wg sync.WaitGroup
for _, location := range locations {
wg.Add(1)
go func(server string, fidList []string) {
defer wg.Done()
if deleteResults, deleteErr := operation.DeleteFilesAtOneVolumeServer(server, c.env.option.GrpcDialOption, fidList, false); deleteErr != nil {
err = deleteErr
} else if deleteResults != nil {
resultChan <- deleteResults
}
}(location.Url, fileIds)
}
wg.Wait()
close(resultChan)
for results := range resultChan {
for _, result := range results {
if result.Error != "" {
fmt.Fprintf(writer, "purge error: %s\n", result.Error)
}
}
}
return
}
func getVolumeFileIdFile(tempFolder string, vid uint32) string {
return filepath.Join(tempFolder, fmt.Sprintf("%d.idx", vid))
}
func getFilerFileIdFile(tempFolder string, vid uint32) string {
return filepath.Join(tempFolder, fmt.Sprintf("%d.fid", vid))
}
func writeToFile(client volume_server_pb.VolumeServer_CopyFileClient, fileName string) error {
flags := os.O_WRONLY | os.O_CREATE | os.O_TRUNC
dst, err := os.OpenFile(fileName, flags, 0644)
if err != nil {
return nil
}
defer dst.Close()
for {
resp, receiveErr := client.Recv()
if receiveErr == io.EOF {
break
}
if receiveErr != nil {
return fmt.Errorf("receiving %s: %v", fileName, receiveErr)
}
dst.Write(resp.FileContent)
}
return nil
}