mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
414 lines
16 KiB
Go
414 lines
16 KiB
Go
package command
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import (
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"context"
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"errors"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/replication"
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"github.com/chrislusf/seaweedfs/weed/replication/sink"
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"github.com/chrislusf/seaweedfs/weed/replication/sink/filersink"
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"github.com/chrislusf/seaweedfs/weed/replication/source"
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"github.com/chrislusf/seaweedfs/weed/security"
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statsCollect "github.com/chrislusf/seaweedfs/weed/stats"
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"github.com/chrislusf/seaweedfs/weed/util"
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"github.com/chrislusf/seaweedfs/weed/util/grace"
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"google.golang.org/grpc"
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"os"
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"strings"
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"time"
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)
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type SyncOptions struct {
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isActivePassive *bool
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filerA *string
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filerB *string
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aPath *string
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bPath *string
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aReplication *string
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bReplication *string
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aCollection *string
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bCollection *string
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aTtlSec *int
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bTtlSec *int
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aDiskType *string
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bDiskType *string
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aDebug *bool
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bDebug *bool
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aFromTsMs *int64
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bFromTsMs *int64
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aProxyByFiler *bool
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bProxyByFiler *bool
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metricsHttpPort *int
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clientId int32
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clientEpoch int32
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}
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var (
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syncOptions SyncOptions
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syncCpuProfile *string
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syncMemProfile *string
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)
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func init() {
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cmdFilerSynchronize.Run = runFilerSynchronize // break init cycle
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syncOptions.isActivePassive = cmdFilerSynchronize.Flag.Bool("isActivePassive", false, "one directional follow from A to B if true")
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syncOptions.filerA = cmdFilerSynchronize.Flag.String("a", "", "filer A in one SeaweedFS cluster")
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syncOptions.filerB = cmdFilerSynchronize.Flag.String("b", "", "filer B in the other SeaweedFS cluster")
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syncOptions.aPath = cmdFilerSynchronize.Flag.String("a.path", "/", "directory to sync on filer A")
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syncOptions.bPath = cmdFilerSynchronize.Flag.String("b.path", "/", "directory to sync on filer B")
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syncOptions.aReplication = cmdFilerSynchronize.Flag.String("a.replication", "", "replication on filer A")
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syncOptions.bReplication = cmdFilerSynchronize.Flag.String("b.replication", "", "replication on filer B")
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syncOptions.aCollection = cmdFilerSynchronize.Flag.String("a.collection", "", "collection on filer A")
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syncOptions.bCollection = cmdFilerSynchronize.Flag.String("b.collection", "", "collection on filer B")
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syncOptions.aTtlSec = cmdFilerSynchronize.Flag.Int("a.ttlSec", 0, "ttl in seconds on filer A")
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syncOptions.bTtlSec = cmdFilerSynchronize.Flag.Int("b.ttlSec", 0, "ttl in seconds on filer B")
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syncOptions.aDiskType = cmdFilerSynchronize.Flag.String("a.disk", "", "[hdd|ssd|<tag>] hard drive or solid state drive or any tag on filer A")
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syncOptions.bDiskType = cmdFilerSynchronize.Flag.String("b.disk", "", "[hdd|ssd|<tag>] hard drive or solid state drive or any tag on filer B")
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syncOptions.aProxyByFiler = cmdFilerSynchronize.Flag.Bool("a.filerProxy", false, "read and write file chunks by filer A instead of volume servers")
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syncOptions.bProxyByFiler = cmdFilerSynchronize.Flag.Bool("b.filerProxy", false, "read and write file chunks by filer B instead of volume servers")
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syncOptions.aDebug = cmdFilerSynchronize.Flag.Bool("a.debug", false, "debug mode to print out filer A received files")
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syncOptions.bDebug = cmdFilerSynchronize.Flag.Bool("b.debug", false, "debug mode to print out filer B received files")
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syncOptions.aFromTsMs = cmdFilerSynchronize.Flag.Int64("a.fromTsMs", 0, "synchronization from timestamp on filer A. The unit is millisecond")
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syncOptions.bFromTsMs = cmdFilerSynchronize.Flag.Int64("b.fromTsMs", 0, "synchronization from timestamp on filer B. The unit is millisecond")
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syncCpuProfile = cmdFilerSynchronize.Flag.String("cpuprofile", "", "cpu profile output file")
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syncMemProfile = cmdFilerSynchronize.Flag.String("memprofile", "", "memory profile output file")
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syncOptions.metricsHttpPort = cmdFilerSynchronize.Flag.Int("metricsPort", 0, "metrics listen port")
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syncOptions.clientId = util.RandomInt32()
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}
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var cmdFilerSynchronize = &Command{
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UsageLine: "filer.sync -a=<oneFilerHost>:<oneFilerPort> -b=<otherFilerHost>:<otherFilerPort>",
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Short: "resumable continuous synchronization between two active-active or active-passive SeaweedFS clusters",
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Long: `resumable continuous synchronization for file changes between two active-active or active-passive filers
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filer.sync listens on filer notifications. If any file is updated, it will fetch the updated content,
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and write to the other destination. Different from filer.replicate:
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* filer.sync only works between two filers.
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* filer.sync does not need any special message queue setup.
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* filer.sync supports both active-active and active-passive modes.
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If restarted, the synchronization will resume from the previous checkpoints, persisted every minute.
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A fresh sync will start from the earliest metadata logs.
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`,
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}
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func runFilerSynchronize(cmd *Command, args []string) bool {
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util.LoadConfiguration("security", false)
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grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
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grace.SetupProfiling(*syncCpuProfile, *syncMemProfile)
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filerA := pb.ServerAddress(*syncOptions.filerA)
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filerB := pb.ServerAddress(*syncOptions.filerB)
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// start filer.sync metrics server
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go statsCollect.StartMetricsServer(*syncOptions.metricsHttpPort)
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// read a filer signature
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aFilerSignature, aFilerErr := replication.ReadFilerSignature(grpcDialOption, filerA)
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if aFilerErr != nil {
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glog.Errorf("get filer 'a' signature %d error from %s to %s: %v", aFilerSignature, *syncOptions.filerA, *syncOptions.filerB, aFilerErr)
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return true
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}
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// read b filer signature
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bFilerSignature, bFilerErr := replication.ReadFilerSignature(grpcDialOption, filerB)
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if bFilerErr != nil {
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glog.Errorf("get filer 'b' signature %d error from %s to %s: %v", bFilerSignature, *syncOptions.filerA, *syncOptions.filerB, bFilerErr)
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return true
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}
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go func() {
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// a->b
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// set synchronization start timestamp to offset
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initOffsetError := initOffsetFromTsMs(grpcDialOption, filerB, aFilerSignature, *syncOptions.bFromTsMs)
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if initOffsetError != nil {
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glog.Errorf("init offset from timestamp %d error from %s to %s: %v", *syncOptions.bFromTsMs, *syncOptions.filerA, *syncOptions.filerB, initOffsetError)
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os.Exit(2)
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}
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for {
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syncOptions.clientEpoch++
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err := doSubscribeFilerMetaChanges(syncOptions.clientId, syncOptions.clientEpoch, grpcDialOption, filerA, *syncOptions.aPath, *syncOptions.aProxyByFiler, filerB,
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*syncOptions.bPath, *syncOptions.bReplication, *syncOptions.bCollection, *syncOptions.bTtlSec, *syncOptions.bProxyByFiler, *syncOptions.bDiskType,
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*syncOptions.bDebug, aFilerSignature, bFilerSignature)
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if err != nil {
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glog.Errorf("sync from %s to %s: %v", *syncOptions.filerA, *syncOptions.filerB, err)
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time.Sleep(1747 * time.Millisecond)
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}
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}
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}()
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if !*syncOptions.isActivePassive {
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// b->a
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// set synchronization start timestamp to offset
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initOffsetError := initOffsetFromTsMs(grpcDialOption, filerA, bFilerSignature, *syncOptions.aFromTsMs)
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if initOffsetError != nil {
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glog.Errorf("init offset from timestamp %d error from %s to %s: %v", *syncOptions.aFromTsMs, *syncOptions.filerB, *syncOptions.filerA, initOffsetError)
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os.Exit(2)
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}
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go func() {
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for {
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syncOptions.clientEpoch++
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err := doSubscribeFilerMetaChanges(syncOptions.clientId, syncOptions.clientEpoch, grpcDialOption, filerB, *syncOptions.bPath, *syncOptions.bProxyByFiler, filerA,
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*syncOptions.aPath, *syncOptions.aReplication, *syncOptions.aCollection, *syncOptions.aTtlSec, *syncOptions.aProxyByFiler, *syncOptions.aDiskType,
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*syncOptions.aDebug, bFilerSignature, aFilerSignature)
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if err != nil {
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glog.Errorf("sync from %s to %s: %v", *syncOptions.filerB, *syncOptions.filerA, err)
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time.Sleep(2147 * time.Millisecond)
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}
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}
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}()
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}
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select {}
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return true
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}
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// initOffsetFromTsMs Initialize offset
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func initOffsetFromTsMs(grpcDialOption grpc.DialOption, targetFiler pb.ServerAddress, sourceFilerSignature int32, fromTsMs int64) error {
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if fromTsMs <= 0 {
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return nil
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}
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// convert to nanosecond
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fromTsNs := fromTsMs * 1000_000
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// If not successful, exit the program.
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setOffsetErr := setOffset(grpcDialOption, targetFiler, SyncKeyPrefix, sourceFilerSignature, fromTsNs)
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if setOffsetErr != nil {
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return setOffsetErr
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}
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glog.Infof("setOffset from timestamp ms success! start offset: %d from %s to %s", fromTsNs, *syncOptions.filerA, *syncOptions.filerB)
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return nil
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}
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func doSubscribeFilerMetaChanges(clientId int32, clientEpoch int32, grpcDialOption grpc.DialOption, sourceFiler pb.ServerAddress, sourcePath string, sourceReadChunkFromFiler bool, targetFiler pb.ServerAddress, targetPath string,
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replicationStr, collection string, ttlSec int, sinkWriteChunkByFiler bool, diskType string, debug bool, sourceFilerSignature int32, targetFilerSignature int32) error {
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// if first time, start from now
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// if has previously synced, resume from that point of time
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sourceFilerOffsetTsNs, err := getOffset(grpcDialOption, targetFiler, getSignaturePrefixByPath(sourcePath), sourceFilerSignature)
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if err != nil {
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return err
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}
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glog.V(0).Infof("start sync %s(%d) => %s(%d) from %v(%d)", sourceFiler, sourceFilerSignature, targetFiler, targetFilerSignature, time.Unix(0, sourceFilerOffsetTsNs), sourceFilerOffsetTsNs)
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// create filer sink
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filerSource := &source.FilerSource{}
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filerSource.DoInitialize(sourceFiler.ToHttpAddress(), sourceFiler.ToGrpcAddress(), sourcePath, sourceReadChunkFromFiler)
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filerSink := &filersink.FilerSink{}
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filerSink.DoInitialize(targetFiler.ToHttpAddress(), targetFiler.ToGrpcAddress(), targetPath, replicationStr, collection, ttlSec, diskType, grpcDialOption, sinkWriteChunkByFiler)
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filerSink.SetSourceFiler(filerSource)
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persistEventFn := genProcessFunction(sourcePath, targetPath, filerSink, debug)
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processEventFn := func(resp *filer_pb.SubscribeMetadataResponse) error {
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message := resp.EventNotification
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for _, sig := range message.Signatures {
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if sig == targetFilerSignature && targetFilerSignature != 0 {
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fmt.Printf("%s skipping %s change to %v\n", targetFiler, sourceFiler, message)
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return nil
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}
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}
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return persistEventFn(resp)
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}
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var lastLogTsNs = time.Now().UnixNano()
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var clientName = fmt.Sprintf("syncFrom_%s_To_%s", string(sourceFiler), string(targetFiler))
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processEventFnWithOffset := pb.AddOffsetFunc(processEventFn, 3*time.Second, func(counter int64, lastTsNs int64) error {
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now := time.Now().UnixNano()
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glog.V(0).Infof("sync %s to %s progressed to %v %0.2f/sec", sourceFiler, targetFiler, time.Unix(0, lastTsNs), float64(counter)/(float64(now-lastLogTsNs)/1e9))
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lastLogTsNs = now
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// collect synchronous offset
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statsCollect.FilerSyncOffsetGauge.WithLabelValues(sourceFiler.String(), targetFiler.String(), clientName, sourcePath).Set(float64(lastTsNs))
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return setOffset(grpcDialOption, targetFiler, getSignaturePrefixByPath(sourcePath), sourceFilerSignature, lastTsNs)
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})
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return pb.FollowMetadata(sourceFiler, grpcDialOption, clientName, clientId, clientEpoch,
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sourcePath, nil, sourceFilerOffsetTsNs, 0, targetFilerSignature, processEventFnWithOffset, pb.RetryForeverOnError)
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}
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const (
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SyncKeyPrefix = "sync."
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)
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// When each business is distinguished according to path, and offsets need to be maintained separately.
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func getSignaturePrefixByPath(path string) string {
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// compatible historical version
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if path == "/" {
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return SyncKeyPrefix
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} else {
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return SyncKeyPrefix + path
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}
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}
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func getOffset(grpcDialOption grpc.DialOption, filer pb.ServerAddress, signaturePrefix string, signature int32) (lastOffsetTsNs int64, readErr error) {
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readErr = pb.WithFilerClient(false, filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
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syncKey := []byte(signaturePrefix + "____")
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util.Uint32toBytes(syncKey[len(signaturePrefix):len(signaturePrefix)+4], uint32(signature))
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resp, err := client.KvGet(context.Background(), &filer_pb.KvGetRequest{Key: syncKey})
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if err != nil {
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return err
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}
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if len(resp.Error) != 0 {
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return errors.New(resp.Error)
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}
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if len(resp.Value) < 8 {
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return nil
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}
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lastOffsetTsNs = int64(util.BytesToUint64(resp.Value))
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return nil
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})
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return
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}
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func setOffset(grpcDialOption grpc.DialOption, filer pb.ServerAddress, signaturePrefix string, signature int32, offsetTsNs int64) error {
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return pb.WithFilerClient(false, filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
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syncKey := []byte(signaturePrefix + "____")
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util.Uint32toBytes(syncKey[len(signaturePrefix):len(signaturePrefix)+4], uint32(signature))
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valueBuf := make([]byte, 8)
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util.Uint64toBytes(valueBuf, uint64(offsetTsNs))
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resp, err := client.KvPut(context.Background(), &filer_pb.KvPutRequest{
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Key: syncKey,
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Value: valueBuf,
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})
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if err != nil {
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return err
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}
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if len(resp.Error) != 0 {
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return errors.New(resp.Error)
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}
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return nil
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})
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}
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func genProcessFunction(sourcePath string, targetPath string, dataSink sink.ReplicationSink, debug bool) func(resp *filer_pb.SubscribeMetadataResponse) error {
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// process function
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processEventFn := func(resp *filer_pb.SubscribeMetadataResponse) error {
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message := resp.EventNotification
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var sourceOldKey, sourceNewKey util.FullPath
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if message.OldEntry != nil {
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sourceOldKey = util.FullPath(resp.Directory).Child(message.OldEntry.Name)
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}
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if message.NewEntry != nil {
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sourceNewKey = util.FullPath(message.NewParentPath).Child(message.NewEntry.Name)
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}
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if debug {
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glog.V(0).Infof("received %v", resp)
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}
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if !strings.HasPrefix(resp.Directory, sourcePath) {
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return nil
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}
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// handle deletions
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if filer_pb.IsDelete(resp) {
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if !strings.HasPrefix(string(sourceOldKey), sourcePath) {
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return nil
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}
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key := buildKey(dataSink, message, targetPath, sourceOldKey, sourcePath)
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if !dataSink.IsIncremental() {
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return dataSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
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}
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return nil
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}
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// handle new entries
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if filer_pb.IsCreate(resp) {
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if !strings.HasPrefix(string(sourceNewKey), sourcePath) {
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return nil
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}
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key := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
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return dataSink.CreateEntry(key, message.NewEntry, message.Signatures)
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}
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// this is something special?
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if filer_pb.IsEmpty(resp) {
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return nil
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}
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// handle updates
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if strings.HasPrefix(string(sourceOldKey), sourcePath) {
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// old key is in the watched directory
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if strings.HasPrefix(string(sourceNewKey), sourcePath) {
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// new key is also in the watched directory
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if !dataSink.IsIncremental() {
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oldKey := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
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message.NewParentPath = util.Join(targetPath, message.NewParentPath[len(sourcePath):])
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foundExisting, err := dataSink.UpdateEntry(string(oldKey), message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks, message.Signatures)
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if foundExisting {
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return err
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}
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// not able to find old entry
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if err = dataSink.DeleteEntry(string(oldKey), message.OldEntry.IsDirectory, false, message.Signatures); err != nil {
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return fmt.Errorf("delete old entry %v: %v", oldKey, err)
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}
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}
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// create the new entry
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newKey := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
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return dataSink.CreateEntry(newKey, message.NewEntry, message.Signatures)
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} else {
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// new key is outside of the watched directory
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if !dataSink.IsIncremental() {
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key := buildKey(dataSink, message, targetPath, sourceOldKey, sourcePath)
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return dataSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
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}
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}
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} else {
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// old key is outside of the watched directory
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if strings.HasPrefix(string(sourceNewKey), sourcePath) {
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// new key is in the watched directory
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key := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
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return dataSink.CreateEntry(key, message.NewEntry, message.Signatures)
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} else {
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// new key is also outside of the watched directory
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// skip
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}
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}
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return nil
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}
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return processEventFn
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}
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func buildKey(dataSink sink.ReplicationSink, message *filer_pb.EventNotification, targetPath string, sourceKey util.FullPath, sourcePath string) (key string) {
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if !dataSink.IsIncremental() {
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key = util.Join(targetPath, string(sourceKey)[len(sourcePath):])
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} else {
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var mTime int64
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if message.NewEntry != nil {
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mTime = message.NewEntry.Attributes.Mtime
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} else if message.OldEntry != nil {
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mTime = message.OldEntry.Attributes.Mtime
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}
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dateKey := time.Unix(mTime, 0).Format("2006-01-02")
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key = util.Join(targetPath, dateKey, string(sourceKey)[len(sourcePath):])
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}
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return escapeKey(key)
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}
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