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=: ", 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 { util.LoadConfiguration("security", false) util.LoadConfiguration("replication", true) grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client") 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) } } } }) }