package command import ( "context" "fmt" "os" "strings" "time" "github.com/chrislusf/seaweedfs/weed/filer" "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/pb/remote_pb" "github.com/chrislusf/seaweedfs/weed/remote_storage" "github.com/chrislusf/seaweedfs/weed/replication/source" "github.com/chrislusf/seaweedfs/weed/util" "github.com/golang/protobuf/proto" "google.golang.org/grpc" ) func followUpdatesAndUploadToRemote(option *RemoteSyncOptions, filerSource *source.FilerSource, mountedDir string) error { // read filer remote storage mount mappings _, _, remoteStorageMountLocation, remoteStorage, detectErr := filer.DetectMountInfo(option.grpcDialOption, pb.ServerAddress(*option.filerAddress), mountedDir) if detectErr != nil { return fmt.Errorf("read mount info: %v", detectErr) } eachEntryFunc, err := makeEventProcessor(remoteStorage, mountedDir, remoteStorageMountLocation, filerSource) if err != nil { return err } processEventFnWithOffset := pb.AddOffsetFunc(eachEntryFunc, 3*time.Second, func(counter int64, lastTsNs int64) error { lastTime := time.Unix(0, lastTsNs) glog.V(0).Infof("remote sync %s progressed to %v %0.2f/sec", *option.filerAddress, lastTime, float64(counter)/float64(3)) return remote_storage.SetSyncOffset(option.grpcDialOption, pb.ServerAddress(*option.filerAddress), mountedDir, lastTsNs) }) lastOffsetTs := collectLastSyncOffset(option, option.grpcDialOption, pb.ServerAddress(*option.filerAddress), mountedDir, *option.timeAgo) option.clientEpoch++ return pb.FollowMetadata(pb.ServerAddress(*option.filerAddress), option.grpcDialOption, "filer.remote.sync", option.clientId, option.clientEpoch, mountedDir, []string{filer.DirectoryEtcRemote}, lastOffsetTs.UnixNano(), 0, 0, processEventFnWithOffset, pb.TrivialOnError) } func makeEventProcessor(remoteStorage *remote_pb.RemoteConf, mountedDir string, remoteStorageMountLocation *remote_pb.RemoteStorageLocation, filerSource *source.FilerSource) (pb.ProcessMetadataFunc, error) { client, err := remote_storage.GetRemoteStorage(remoteStorage) if err != nil { return nil, err } handleEtcRemoteChanges := func(resp *filer_pb.SubscribeMetadataResponse) error { message := resp.EventNotification if message.NewEntry == nil { return nil } if message.NewEntry.Name == filer.REMOTE_STORAGE_MOUNT_FILE { mappings, readErr := filer.UnmarshalRemoteStorageMappings(message.NewEntry.Content) if readErr != nil { return fmt.Errorf("unmarshal mappings: %v", readErr) } if remoteLoc, found := mappings.Mappings[mountedDir]; found { if remoteStorageMountLocation.Bucket != remoteLoc.Bucket || remoteStorageMountLocation.Path != remoteLoc.Path { glog.Fatalf("Unexpected mount changes %+v => %+v", remoteStorageMountLocation, remoteLoc) } } else { glog.V(0).Infof("unmounted %s exiting ...", mountedDir) os.Exit(0) } } if message.NewEntry.Name == remoteStorage.Name+filer.REMOTE_STORAGE_CONF_SUFFIX { conf := &remote_pb.RemoteConf{} if err := proto.Unmarshal(message.NewEntry.Content, conf); err != nil { return fmt.Errorf("unmarshal %s/%s: %v", filer.DirectoryEtcRemote, message.NewEntry.Name, err) } remoteStorage = conf if newClient, err := remote_storage.GetRemoteStorage(remoteStorage); err == nil { client = newClient } else { return err } } return nil } eachEntryFunc := func(resp *filer_pb.SubscribeMetadataResponse) error { message := resp.EventNotification if strings.HasPrefix(resp.Directory, filer.DirectoryEtcRemote) { return handleEtcRemoteChanges(resp) } if filer_pb.IsEmpty(resp) { return nil } if filer_pb.IsCreate(resp) { if !filer.HasData(message.NewEntry) { return nil } glog.V(2).Infof("create: %+v", resp) if !shouldSendToRemote(message.NewEntry) { glog.V(2).Infof("skipping creating: %+v", resp) return nil } dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(message.NewParentPath, message.NewEntry.Name), remoteStorageMountLocation) if message.NewEntry.IsDirectory { glog.V(0).Infof("mkdir %s", remote_storage.FormatLocation(dest)) return client.WriteDirectory(dest, message.NewEntry) } glog.V(0).Infof("create %s", remote_storage.FormatLocation(dest)) remoteEntry, writeErr := retriedWriteFile(client, filerSource, message.NewEntry, dest) if writeErr != nil { return writeErr } return updateLocalEntry(&remoteSyncOptions, message.NewParentPath, message.NewEntry, remoteEntry) } if filer_pb.IsDelete(resp) { glog.V(2).Infof("delete: %+v", resp) dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(resp.Directory, message.OldEntry.Name), remoteStorageMountLocation) if message.OldEntry.IsDirectory { glog.V(0).Infof("rmdir %s", remote_storage.FormatLocation(dest)) return client.RemoveDirectory(dest) } glog.V(0).Infof("delete %s", remote_storage.FormatLocation(dest)) return client.DeleteFile(dest) } if message.OldEntry != nil && message.NewEntry != nil { oldDest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(resp.Directory, message.OldEntry.Name), remoteStorageMountLocation) dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(message.NewParentPath, message.NewEntry.Name), remoteStorageMountLocation) if !shouldSendToRemote(message.NewEntry) { glog.V(2).Infof("skipping updating: %+v", resp) return nil } if message.NewEntry.IsDirectory { return client.WriteDirectory(dest, message.NewEntry) } if resp.Directory == message.NewParentPath && message.OldEntry.Name == message.NewEntry.Name { if filer.IsSameData(message.OldEntry, message.NewEntry) { glog.V(2).Infof("update meta: %+v", resp) return client.UpdateFileMetadata(dest, message.OldEntry, message.NewEntry) } } glog.V(2).Infof("update: %+v", resp) glog.V(0).Infof("delete %s", remote_storage.FormatLocation(oldDest)) if err := client.DeleteFile(oldDest); err != nil { return err } remoteEntry, writeErr := retriedWriteFile(client, filerSource, message.NewEntry, dest) if writeErr != nil { return writeErr } return updateLocalEntry(&remoteSyncOptions, message.NewParentPath, message.NewEntry, remoteEntry) } return nil } return eachEntryFunc, nil } func retriedWriteFile(client remote_storage.RemoteStorageClient, filerSource *source.FilerSource, newEntry *filer_pb.Entry, dest *remote_pb.RemoteStorageLocation) (remoteEntry *filer_pb.RemoteEntry, err error) { var writeErr error err = util.Retry("writeFile", func() error { reader := filer.NewFileReader(filerSource, newEntry) glog.V(0).Infof("create %s", remote_storage.FormatLocation(dest)) remoteEntry, writeErr = client.WriteFile(dest, newEntry, reader) if writeErr != nil { return writeErr } return nil }) if err != nil { glog.Errorf("write to %s: %v", dest, err) } return } func collectLastSyncOffset(filerClient filer_pb.FilerClient, grpcDialOption grpc.DialOption, filerAddress pb.ServerAddress, mountedDir string, timeAgo time.Duration) time.Time { // 1. specified by timeAgo // 2. last offset timestamp for this directory // 3. directory creation time var lastOffsetTs time.Time if timeAgo == 0 { mountedDirEntry, err := filer_pb.GetEntry(filerClient, util.FullPath(mountedDir)) if err != nil { glog.V(0).Infof("get mounted directory %s: %v", mountedDir, err) return time.Now() } lastOffsetTsNs, err := remote_storage.GetSyncOffset(grpcDialOption, filerAddress, mountedDir) if mountedDirEntry != nil { if err == nil && mountedDirEntry.Attributes.Crtime < lastOffsetTsNs/1000000 { lastOffsetTs = time.Unix(0, lastOffsetTsNs) glog.V(0).Infof("resume from %v", lastOffsetTs) } else { lastOffsetTs = time.Unix(mountedDirEntry.Attributes.Crtime, 0) } } else { lastOffsetTs = time.Now() } } else { lastOffsetTs = time.Now().Add(-timeAgo) } return lastOffsetTs } func toRemoteStorageLocation(mountDir, sourcePath util.FullPath, remoteMountLocation *remote_pb.RemoteStorageLocation) *remote_pb.RemoteStorageLocation { source := string(sourcePath[len(mountDir):]) dest := util.FullPath(remoteMountLocation.Path).Child(source) return &remote_pb.RemoteStorageLocation{ Name: remoteMountLocation.Name, Bucket: remoteMountLocation.Bucket, Path: string(dest), } } func shouldSendToRemote(entry *filer_pb.Entry) bool { if entry.RemoteEntry == nil { return true } if entry.RemoteEntry.RemoteMtime < entry.Attributes.Mtime { return true } return false } func updateLocalEntry(filerClient filer_pb.FilerClient, dir string, entry *filer_pb.Entry, remoteEntry *filer_pb.RemoteEntry) error { remoteEntry.LastLocalSyncTsNs = time.Now().UnixNano() entry.RemoteEntry = remoteEntry return filerClient.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error { _, err := client.UpdateEntry(context.Background(), &filer_pb.UpdateEntryRequest{ Directory: dir, Entry: entry, }) return err }) }