package command import ( "context" "strings" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/replication" "github.com/chrislusf/seaweedfs/weed/replication/sink" _ "github.com/chrislusf/seaweedfs/weed/replication/sink/azuresink" _ "github.com/chrislusf/seaweedfs/weed/replication/sink/b2sink" _ "github.com/chrislusf/seaweedfs/weed/replication/sink/filersink" _ "github.com/chrislusf/seaweedfs/weed/replication/sink/gcssink" _ "github.com/chrislusf/seaweedfs/weed/replication/sink/s3sink" "github.com/chrislusf/seaweedfs/weed/replication/sub" "github.com/chrislusf/seaweedfs/weed/util" ) func init() { cmdFilerReplicate.Run = runFilerReplicate // break init cycle } var cmdFilerReplicate = &Command{ UsageLine: "filer.replicate", Short: "replicate file changes to another destination", Long: `replicate file changes to another destination filer.replicate listens on filer notifications. If any file is updated, it will fetch the updated content, and write to the other destination. Run "weed scaffold -config=replication" to generate a replication.toml file and customize the parameters. `, } func runFilerReplicate(cmd *Command, args []string) bool { util.LoadConfiguration("security", false) util.LoadConfiguration("replication", true) util.LoadConfiguration("notification", true) config := util.GetViper() var notificationInput sub.NotificationInput validateOneEnabledInput(config) for _, input := range sub.NotificationInputs { if config.GetBool("notification." + input.GetName() + ".enabled") { if err := input.Initialize(config, "notification."+input.GetName()+"."); err != nil { glog.Fatalf("Failed to initialize notification input for %s: %+v", input.GetName(), err) } glog.V(0).Infof("Configure notification input to %s", input.GetName()) notificationInput = input break } } if notificationInput == nil { println("No notification is defined in notification.toml file.") println("Please follow 'weed scaffold -config=notification' to see example notification configurations.") return true } // avoid recursive replication if config.GetBool("notification.source.filer.enabled") && config.GetBool("notification.sink.filer.enabled") { if config.GetString("source.filer.grpcAddress") == config.GetString("sink.filer.grpcAddress") { fromDir := config.GetString("source.filer.directory") toDir := config.GetString("sink.filer.directory") if strings.HasPrefix(toDir, fromDir) { glog.Fatalf("recursive replication! source directory %s includes the sink directory %s", fromDir, toDir) } } } 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 } } if dataSink == nil { println("no data sink configured in replication.toml:") for _, sk := range sink.Sinks { println(" " + sk.GetName()) } return true } replicator := replication.NewReplicator(config, "source.filer.", dataSink) for { key, m, err := notificationInput.ReceiveMessage() if err != nil { glog.Errorf("receive %s: %+v", key, err) continue } if key == "" { // long poll received no messages continue } if m.OldEntry != nil && m.NewEntry == nil { glog.V(1).Infof("delete: %s", key) } else if m.OldEntry == nil && m.NewEntry != nil { glog.V(1).Infof(" add: %s", key) } else { glog.V(1).Infof("modify: %s", key) } if err = replicator.Replicate(context.Background(), key, m); err != nil { glog.Errorf("replicate %s: %+v", key, err) } else { glog.V(1).Infof("replicated %s", key) } } } func validateOneEnabledInput(config *util.ViperProxy) { enabledInput := "" for _, input := range sub.NotificationInputs { if config.GetBool("notification." + input.GetName() + ".enabled") { if enabledInput == "" { enabledInput = input.GetName() } else { glog.Fatalf("Notification input is enabled for both %s and %s", enabledInput, input.GetName()) } } } }