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filer.backup: added to replace filer.replicate

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This commit is contained in:
Chris Lu 2021-02-28 16:22:27 -08:00
parent 014a31d11a
commit e52c94640e
5 changed files with 296 additions and 99 deletions
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4
weed/Makefile
View file

@ -33,3 +33,7 @@ debug_webdav:
debug_s3:
go build -gcflags="all=-N -l"
dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 s3
debug_filer_copy:
go build -gcflags="all=-N -l"
dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.backup -filer=localhost:8888 -filerProxy -timeAgo=10h

1
weed/command/command.go
View file

@ -15,6 +15,7 @@ var Commands = []*Command{
cmdDownload,
cmdExport,
cmdFiler,
cmdFilerBackup,
cmdFilerCat,
cmdFilerMetaTail,
cmdFilerReplicate,

158
weed/command/filer_backup.go Normal file
View file

@ -0,0 +1,158 @@
package command
import (
"context"
"fmt"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/replication/source"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/util"
"google.golang.org/grpc"
"io"
"time"
)
type FilerBackupOptions struct {
isActivePassive *bool
filer *string
path *string
debug *bool
proxyByFiler *bool
timeAgo *time.Duration
}
var (
filerBackupOptions FilerBackupOptions
)
func init() {
cmdFilerBackup.Run = runFilerBackup // break init cycle
filerBackupOptions.filer = cmdFilerBackup.Flag.String("filer", "localhost:8888", "filer of one SeaweedFS cluster")
filerBackupOptions.path = cmdFilerBackup.Flag.String("filerPath", "/", "directory to sync on filer")
filerBackupOptions.proxyByFiler = cmdFilerBackup.Flag.Bool("filerProxy", false, "read and write file chunks by filer instead of volume servers")
filerBackupOptions.debug = cmdFilerBackup.Flag.Bool("debug", false, "debug mode to print out received files")
filerBackupOptions.timeAgo = cmdFilerBackup.Flag.Duration("timeAgo", 0, "start time before now. \"300ms\", \"1.5h\" or \"2h45m\". Valid time units are \"ns\", \"us\" (or \"µs\"), \"ms\", \"s\", \"m\", \"h\"")
}
var cmdFilerBackup = &Command{
UsageLine: "filer.backup -filer=<filerHost>:<filerPort> ",
Short: "resume-able continuously replicate files from a SeaweedFS cluster to another location defined in replication.toml",
Long: `resume-able continuously replicate files from a SeaweedFS cluster to another location defined in replication.toml
filer.backup listens on filer notifications. If any file is updated, it will fetch the updated content,
and write to the destination. This is to replace filer.replicate command since additional message queue is not needed.
If restarted and "-timeAgo" is not set, the synchronization will resume from the previous checkpoints, persisted every minute.
A fresh sync will start from the earliest metadata logs. To reset the checkpoints, just set "-timeAgo" to a high value.
`,
}
func runFilerBackup(cmd *Command, args []string) bool {
grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
util.LoadConfiguration("security", false)
util.LoadConfiguration("replication", true)
for {
err := doFilerBackup(grpcDialOption, &filerBackupOptions)
if err != nil {
glog.Errorf("backup from %s: %v", *filerBackupOptions.filer, err)
time.Sleep(1747 * time.Millisecond)
}
}
return true
}
const (
BackupKeyPrefix = "backup."
)
func doFilerBackup(grpcDialOption grpc.DialOption, backupOption *FilerBackupOptions) error {
// find data sink
config := util.GetViper()
dataSink := findSink(config)
if dataSink == nil {
return fmt.Errorf("no data sink configured in replication.toml")
}
sourceFiler := *backupOption.filer
sourcePath := *backupOption.path
timeAgo := *backupOption.timeAgo
targetPath := dataSink.GetSinkToDirectory()
debug := *backupOption.debug
// get start time for the data sink
startFrom := time.Unix(0, 0)
sinkId := util.HashStringToLong(dataSink.GetName() + dataSink.GetSinkToDirectory())
if timeAgo.Milliseconds() == 0 {
lastOffsetTsNs, err := getOffset(grpcDialOption, sourceFiler, BackupKeyPrefix, int32(sinkId))
if err != nil {
glog.V(0).Infof("starting from %v", startFrom)
} else {
startFrom = time.Unix(0, lastOffsetTsNs)
glog.V(0).Infof("resuming from %v", startFrom)
}
} else {
startFrom = time.Now().Add(-timeAgo)
glog.V(0).Infof("start time is set to %v", startFrom)
}
// create filer sink
filerSource := &source.FilerSource{}
filerSource.DoInitialize(sourceFiler, pb.ServerToGrpcAddress(sourceFiler), sourcePath, *backupOption.proxyByFiler)
dataSink.SetSourceFiler(filerSource)
processEventFn := genProcessFunction(sourcePath, targetPath, dataSink, debug)
return pb.WithFilerClient(sourceFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
ClientName: "backup_" + dataSink.GetName(),
PathPrefix: sourcePath,
SinceNs: startFrom.UnixNano(),
})
if err != nil {
return fmt.Errorf("listen: %v", err)
}
var counter int64
var lastWriteTime time.Time
for {
resp, listenErr := stream.Recv()
if listenErr == io.EOF {
return nil
}
if listenErr != nil {
return listenErr
}
if err := processEventFn(resp); err != nil {
return fmt.Errorf("processEventFn: %v", err)
}
counter++
if lastWriteTime.Add(3 * time.Second).Before(time.Now()) {
glog.V(0).Infof("backup %s progressed to %v %0.2f/sec", sourceFiler, time.Unix(0, resp.TsNs), float64(counter)/float64(3))
counter = 0
lastWriteTime = time.Now()
if err := setOffset(grpcDialOption, sourceFiler, BackupKeyPrefix, int32(sinkId), resp.TsNs); err != nil {
return fmt.Errorf("setOffset: %v", err)
}
}
}
})
}

29
weed/command/filer_replication.go
View file

@ -74,18 +74,7 @@ func runFilerReplicate(cmd *Command, args []string) bool {
}
}
var dataSink sink.ReplicationSink
for _, sk := range sink.Sinks {
if config.GetBool("sink." + sk.GetName() + ".enabled") {
if err := sk.Initialize(config, "sink."+sk.GetName()+"."); err != nil {
glog.Fatalf("Failed to initialize sink for %s: %+v",
sk.GetName(), err)
}
glog.V(0).Infof("Configure sink to %s", sk.GetName())
dataSink = sk
break
}
}
dataSink := findSink(config)
if dataSink == nil {
println("no data sink configured in replication.toml:")
@ -135,6 +124,22 @@ func runFilerReplicate(cmd *Command, args []string) bool {
}
func findSink(config *util.ViperProxy) sink.ReplicationSink {
var dataSink sink.ReplicationSink
for _, sk := range sink.Sinks {
if config.GetBool("sink." + sk.GetName() + ".enabled") {
if err := sk.Initialize(config, "sink."+sk.GetName()+"."); err != nil {
glog.Fatalf("Failed to initialize sink for %s: %+v",
sk.GetName(), err)
}
glog.V(0).Infof("Configure sink to %s", sk.GetName())
dataSink = sk
break
}
}
return dataSink
}
func validateOneEnabledInput(config *util.ViperProxy) {
enabledInput := ""
for _, input := range sub.NotificationInputs {

203
weed/command/filer_sync.go
View file

@ -8,6 +8,7 @@ import (
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/replication"
"github.com/chrislusf/seaweedfs/weed/replication/sink"
"github.com/chrislusf/seaweedfs/weed/replication/sink/filersink"
"github.com/chrislusf/seaweedfs/weed/replication/source"
"github.com/chrislusf/seaweedfs/weed/security"
@ -137,7 +138,7 @@ func doSubscribeFilerMetaChanges(grpcDialOption grpc.DialOption, sourceFiler, so
// if first time, start from now
// if has previously synced, resume from that point of time
sourceFilerOffsetTsNs, err := readSyncOffset(grpcDialOption, targetFiler, sourceFilerSignature)
sourceFilerOffsetTsNs, err := getOffset(grpcDialOption, targetFiler, SyncKeyPrefix, sourceFilerSignature)
if err != nil {
return err
}
@ -151,93 +152,17 @@ func doSubscribeFilerMetaChanges(grpcDialOption grpc.DialOption, sourceFiler, so
filerSink.DoInitialize(targetFiler, pb.ServerToGrpcAddress(targetFiler), targetPath, replicationStr, collection, ttlSec, diskType, grpcDialOption, sinkWriteChunkByFiler)
filerSink.SetSourceFiler(filerSource)
persistEventFn := genProcessFunction(sourcePath, targetPath, filerSink, debug)
processEventFn := func(resp *filer_pb.SubscribeMetadataResponse) error {
message := resp.EventNotification
var sourceOldKey, sourceNewKey util.FullPath
if message.OldEntry != nil {
sourceOldKey = util.FullPath(resp.Directory).Child(message.OldEntry.Name)
}
if message.NewEntry != nil {
sourceNewKey = util.FullPath(message.NewParentPath).Child(message.NewEntry.Name)
}
for _, sig := range message.Signatures {
if sig == targetFilerSignature && targetFilerSignature != 0 {
fmt.Printf("%s skipping %s change to %v\n", targetFiler, sourceFiler, message)
return nil
}
}
if debug {
fmt.Printf("%s check %s change %s,%s sig %v, target sig: %v\n", targetFiler, sourceFiler, sourceOldKey, sourceNewKey, message.Signatures, targetFilerSignature)
}
if !strings.HasPrefix(resp.Directory, sourcePath) {
return nil
}
// handle deletions
if message.OldEntry != nil && message.NewEntry == nil {
if !strings.HasPrefix(string(sourceOldKey), sourcePath) {
return nil
}
key := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
return filerSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
}
// handle new entries
if message.OldEntry == nil && message.NewEntry != nil {
if !strings.HasPrefix(string(sourceNewKey), sourcePath) {
return nil
}
key := util.Join(targetPath, string(sourceNewKey)[len(sourcePath):])
return filerSink.CreateEntry(key, message.NewEntry, message.Signatures)
}
// this is something special?
if message.OldEntry == nil && message.NewEntry == nil {
return nil
}
// handle updates
if strings.HasPrefix(string(sourceOldKey), sourcePath) {
// old key is in the watched directory
if strings.HasPrefix(string(sourceNewKey), sourcePath) {
// new key is also in the watched directory
oldKey := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
message.NewParentPath = util.Join(targetPath, message.NewParentPath[len(sourcePath):])
foundExisting, err := filerSink.UpdateEntry(string(oldKey), message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks, message.Signatures)
if foundExisting {
return err
}
// not able to find old entry
if err = filerSink.DeleteEntry(string(oldKey), message.OldEntry.IsDirectory, false, message.Signatures); err != nil {
return fmt.Errorf("delete old entry %v: %v", oldKey, err)
}
// create the new entry
newKey := util.Join(targetPath, string(sourceNewKey)[len(sourcePath):])
return filerSink.CreateEntry(newKey, message.NewEntry, message.Signatures)
} else {
// new key is outside of the watched directory
key := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
return filerSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
}
} else {
// old key is outside of the watched directory
if strings.HasPrefix(string(sourceNewKey), sourcePath) {
// new key is in the watched directory
key := util.Join(targetPath, string(sourceNewKey)[len(sourcePath):])
return filerSink.CreateEntry(key, message.NewEntry, message.Signatures)
} else {
// new key is also outside of the watched directory
// skip
}
}
return nil
return persistEventFn(resp)
}
return pb.WithFilerClient(sourceFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
@ -275,7 +200,7 @@ func doSubscribeFilerMetaChanges(grpcDialOption grpc.DialOption, sourceFiler, so
glog.V(0).Infof("sync %s => %s progressed to %v %0.2f/sec", sourceFiler, targetFiler, time.Unix(0, resp.TsNs), float64(counter)/float64(3))
counter = 0
lastWriteTime = time.Now()
if err := writeSyncOffset(grpcDialOption, targetFiler, sourceFilerSignature, resp.TsNs); err != nil {
if err := setOffset(grpcDialOption, targetFiler, SyncKeyPrefix, sourceFilerSignature, resp.TsNs); err != nil {
return err
}
}
@ -290,11 +215,11 @@ const (
SyncKeyPrefix = "sync."
)
func readSyncOffset(grpcDialOption grpc.DialOption, filer string, filerSignature int32) (lastOffsetTsNs int64, readErr error) {
func getOffset(grpcDialOption grpc.DialOption, filer string, signaturePrefix string, signature int32) (lastOffsetTsNs int64, readErr error) {
readErr = pb.WithFilerClient(filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
syncKey := []byte(SyncKeyPrefix + "____")
util.Uint32toBytes(syncKey[len(SyncKeyPrefix):len(SyncKeyPrefix)+4], uint32(filerSignature))
syncKey := []byte(signaturePrefix + "____")
util.Uint32toBytes(syncKey[len(signaturePrefix):len(signaturePrefix)+4], uint32(signature))
resp, err := client.KvGet(context.Background(), &filer_pb.KvGetRequest{Key: syncKey})
if err != nil {
@ -317,11 +242,11 @@ func readSyncOffset(grpcDialOption grpc.DialOption, filer string, filerSignature
}
func writeSyncOffset(grpcDialOption grpc.DialOption, filer string, filerSignature int32, offsetTsNs int64) error {
func setOffset(grpcDialOption grpc.DialOption, filer string, signaturePrefix string, signature int32, offsetTsNs int64) error {
return pb.WithFilerClient(filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
syncKey := []byte(SyncKeyPrefix + "____")
util.Uint32toBytes(syncKey[len(SyncKeyPrefix):len(SyncKeyPrefix)+4], uint32(filerSignature))
syncKey := []byte(signaturePrefix + "____")
util.Uint32toBytes(syncKey[len(signaturePrefix):len(signaturePrefix)+4], uint32(signature))
valueBuf := make([]byte, 8)
util.Uint64toBytes(valueBuf, uint64(offsetTsNs))
@ -343,3 +268,107 @@ func writeSyncOffset(grpcDialOption grpc.DialOption, filer string, filerSignatur
})
}
func genProcessFunction(sourcePath string, targetPath string, dataSink sink.ReplicationSink, debug bool) func(resp *filer_pb.SubscribeMetadataResponse) error {
// process function
processEventFn := func(resp *filer_pb.SubscribeMetadataResponse) error {
message := resp.EventNotification
var sourceOldKey, sourceNewKey util.FullPath
if message.OldEntry != nil {
sourceOldKey = util.FullPath(resp.Directory).Child(message.OldEntry.Name)
}
if message.NewEntry != nil {
sourceNewKey = util.FullPath(message.NewParentPath).Child(message.NewEntry.Name)
}
if debug {
glog.V(0).Infof("received %v", resp)
}
if !strings.HasPrefix(resp.Directory, sourcePath) {
return nil
}
// handle deletions
if message.OldEntry != nil && message.NewEntry == nil {
if !strings.HasPrefix(string(sourceOldKey), sourcePath) {
return nil
}
key := buildKey(dataSink, message, targetPath, sourceOldKey, sourcePath)
return dataSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
}
// handle new entries
if message.OldEntry == nil && message.NewEntry != nil {
if !strings.HasPrefix(string(sourceNewKey), sourcePath) {
return nil
}
key := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
return dataSink.CreateEntry(key, message.NewEntry, message.Signatures)
}
// this is something special?
if message.OldEntry == nil && message.NewEntry == nil {
return nil
}
// handle updates
if strings.HasPrefix(string(sourceOldKey), sourcePath) {
// old key is in the watched directory
if strings.HasPrefix(string(sourceNewKey), sourcePath) {
// new key is also in the watched directory
if !dataSink.IsIncremental() {
oldKey := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
message.NewParentPath = util.Join(targetPath, message.NewParentPath[len(sourcePath):])
foundExisting, err := dataSink.UpdateEntry(string(oldKey), message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks, message.Signatures)
if foundExisting {
return err
}
// not able to find old entry
if err = dataSink.DeleteEntry(string(oldKey), message.OldEntry.IsDirectory, false, message.Signatures); err != nil {
return fmt.Errorf("delete old entry %v: %v", oldKey, err)
}
}
// create the new entry
newKey := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
return dataSink.CreateEntry(newKey, message.NewEntry, message.Signatures)
} else {
// new key is outside of the watched directory
if !dataSink.IsIncremental() {
key := buildKey(dataSink, message, targetPath, sourceOldKey, sourcePath)
return dataSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
}
}
} else {
// old key is outside of the watched directory
if strings.HasPrefix(string(sourceNewKey), sourcePath) {
// new key is in the watched directory
key := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
return dataSink.CreateEntry(key, message.NewEntry, message.Signatures)
} else {
// new key is also outside of the watched directory
// skip
}
}
return nil
}
return processEventFn
}
func buildKey(dataSink sink.ReplicationSink, message *filer_pb.EventNotification, targetPath string, sourceKey util.FullPath, sourcePath string) string {
if !dataSink.IsIncremental() {
return util.Join(targetPath, string(sourceKey)[len(sourcePath):])
}
var mTime int64
if message.NewEntry != nil {
mTime = message.NewEntry.Attributes.Mtime
} else if message.OldEntry != nil {
mTime = message.OldEntry.Attributes.Mtime
}
dateKey := time.Unix(mTime, 0).Format("2006-01-02")
return util.Join(targetPath, dateKey, string(sourceKey)[len(sourcePath):])
}