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81 lines
2.5 KiB
81 lines
2.5 KiB
package command
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import (
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/replication"
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"github.com/chrislusf/seaweedfs/weed/server"
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"github.com/spf13/viper"
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"strings"
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)
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func init() {
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cmdFilerReplicate.Run = runFilerReplicate // break init cycle
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}
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var cmdFilerReplicate = &Command{
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UsageLine: "filer.replicate",
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Short: "replicate file changes to another destination",
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Long: `replicate file changes to another destination
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filer.replicate 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.
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Run "weed scaffold -config replication" to generate a replication.toml file and customize the parameters.
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`,
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}
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func runFilerReplicate(cmd *Command, args []string) bool {
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weed_server.LoadConfiguration("replication", true)
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config := viper.GetViper()
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var notificationInput replication.NotificationInput
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for _, input := range replication.NotificationInputs {
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if config.GetBool("notification." + input.GetName() + ".enabled") {
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viperSub := config.Sub("notification." + input.GetName())
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if err := input.Initialize(viperSub); err != nil {
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glog.Fatalf("Failed to initialize notification input for %s: %+v",
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input.GetName(), err)
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}
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glog.V(0).Infof("Configure notification input to %s", input.GetName())
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notificationInput = input
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break
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}
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}
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// avoid recursive replication
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if config.GetBool("notification.source.filer.enabled") && config.GetBool("notification.sink.filer.enabled") {
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sourceConfig, sinkConfig := config.Sub("source.filer"), config.Sub("sink.filer")
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if sourceConfig.GetString("grpcAddress") == sinkConfig.GetString("grpcAddress") {
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fromDir := sourceConfig.GetString("directory")
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toDir := sinkConfig.GetString("directory")
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if strings.HasPrefix(toDir, fromDir) {
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glog.Fatalf("recursive replication! source directory %s includes the sink directory %s", fromDir, toDir)
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}
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}
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}
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replicator := replication.NewReplicator(config.Sub("source.filer"), config.Sub("sink.filer"))
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for {
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key, m, err := notificationInput.ReceiveMessage()
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if err != nil {
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glog.Errorf("receive %s: %+v", key, err)
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continue
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}
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if m.OldEntry != nil && m.NewEntry == nil {
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glog.V(1).Infof("delete: %s", key)
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} else if m.OldEntry == nil && m.NewEntry != nil {
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glog.V(1).Infof(" add: %s", key)
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} else {
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glog.V(1).Infof("modify: %s", key)
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}
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if err = replicator.Replicate(key, m); err != nil {
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glog.Errorf("replicate %s: %+v", key, err)
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}
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}
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return true
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}
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