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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)
return pb.FollowMetadata(pb.ServerAddress(*option.filerAddress), option.grpcDialOption, "filer.remote.sync", option.clientId,
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
})
}
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