filer.remote.sync can work now

weed/Makefile

@@ -37,3 +37,7 @@ debug_s3:
 debug_filer_copy:
 	go build -gcflags="all=-N -l"
 	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.backup -filer=localhost:8888 -filerProxy -timeAgo=10h
+
+debug_filer_remote_sync:
+	go build -gcflags="all=-N -l"
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.remote.sync -filer="localhost:8888" -dir=/buckets/b2 -timeAgo=10000h

weed/command/command.go

@@ -21,6 +21,7 @@ var Commands = []*Command{
 	cmdFilerCopy,
 	cmdFilerMetaBackup,
 	cmdFilerMetaTail,
+	cmdFilerRemoteSynchronize,
 	cmdFilerReplicate,
 	cmdFilerSynchronize,
 	cmdFix,

weed/command/filer.go

@@ -3,7 +3,6 @@ package command
 import (
 	"fmt"
 	"net/http"
-	_ "net/http/pprof"
 	"os"
 	"strconv"
 	"strings"

weed/command/filer_remote_sync.go

@@ -0,0 +1,219 @@
+package command
+
+import (
+	"fmt"
+	"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/remote_storage"
+	"github.com/chrislusf/seaweedfs/weed/replication/source"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc"
+	"strings"
+	"time"
+)
+
+type RemoteSyncOptions struct {
+	filerAddress       *string
+	grpcDialOption     grpc.DialOption
+	readChunkFromFiler *bool
+	debug              *bool
+	timeAgo            *time.Duration
+	dir                *string
+}
+
+const (
+	RemoteSyncKeyPrefix = "remote.sync."
+)
+
+var _ = filer_pb.FilerClient(&RemoteSyncOptions{})
+
+func (option *RemoteSyncOptions) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
+	return pb.WithFilerClient(*option.filerAddress, option.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		return fn(client)
+	})
+}
+func (option *RemoteSyncOptions) AdjustedUrl(location *filer_pb.Location) string {
+	return location.Url
+}
+
+var (
+	remoteSyncOptions RemoteSyncOptions
+)
+
+func init() {
+	cmdFilerRemoteSynchronize.Run = runFilerRemoteSynchronize // break init cycle
+	remoteSyncOptions.filerAddress = cmdFilerRemoteSynchronize.Flag.String("filer", "localhost:8888", "filer of the SeaweedFS cluster")
+	remoteSyncOptions.dir = cmdFilerRemoteSynchronize.Flag.String("dir", "/", "a mounted directory on filer")
+	remoteSyncOptions.readChunkFromFiler = cmdFilerRemoteSynchronize.Flag.Bool("filerProxy", false, "read file chunks from filer instead of volume servers")
+	remoteSyncOptions.debug = cmdFilerRemoteSynchronize.Flag.Bool("debug", false, "debug mode to print out filer updated remote files")
+	remoteSyncOptions.timeAgo = cmdFilerRemoteSynchronize.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 cmdFilerRemoteSynchronize = &Command{
+	UsageLine: "filer.remote.sync -filer=<filerHost>:<filerPort> -dir=/mount/s3_on_cloud",
+	Short:     "resumeable continuously write back updates to remote storage if the directory is mounted to the remote storage",
+	Long: `resumeable continuously write back updates to remote storage if the directory is mounted to the remote storage
+
+	filer.remote.sync listens on filer update events. 
+	If any mounted remote file is updated, it will fetch the updated content,
+	and write to the remote storage.
+`,
+}
+
+func runFilerRemoteSynchronize(cmd *Command, args []string) bool {
+
+	util.LoadConfiguration("security", false)
+	grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
+	remoteSyncOptions.grpcDialOption = grpcDialOption
+
+	// read filer remote storage mount mappings
+	mappings, readErr := filer.ReadMountMappings(grpcDialOption, *remoteSyncOptions.filerAddress)
+	if readErr != nil {
+		fmt.Printf("read mount mapping: %v", readErr)
+		return false
+	}
+
+	filerSource := &source.FilerSource{}
+	filerSource.DoInitialize(
+		*remoteSyncOptions.filerAddress,
+		pb.ServerToGrpcAddress(*remoteSyncOptions.filerAddress),
+		"/", // does not matter
+		*remoteSyncOptions.readChunkFromFiler,
+	)
+
+	var found bool
+	for dir, remoteStorageMountLocation := range mappings.Mappings {
+		if *remoteSyncOptions.dir == dir {
+			found = true
+			storageConf, readErr := filer.ReadRemoteStorageConf(grpcDialOption, *remoteSyncOptions.filerAddress, remoteStorageMountLocation.Name)
+			if readErr != nil {
+				fmt.Printf("read remote storage configuration for %s: %v", dir, readErr)
+				continue
+			}
+			fmt.Printf("synchronize %s to remote storage...\n", *remoteSyncOptions.dir)
+			if err := util.Retry("filer.remote.sync "+dir, func() error {
+				return followUpdatesAndUploadToRemote(&remoteSyncOptions, filerSource, dir, storageConf, remoteStorageMountLocation)
+			}); err != nil {
+				fmt.Printf("synchronize %s: %v\n", *remoteSyncOptions.dir, err)
+			}
+			break
+		}
+	}
+	if !found {
+		fmt.Printf("directory %s is not mounted to any remote storage\n", *remoteSyncOptions.dir)
+		return false
+	}
+
+	return true
+}
+
+func followUpdatesAndUploadToRemote(option *RemoteSyncOptions, filerSource *source.FilerSource, mountedDir string, remoteStorage *filer_pb.RemoteConf, remoteStorageMountLocation *filer_pb.RemoteStorageLocation) error {
+
+	dirHash := util.HashStringToLong(mountedDir)
+
+	// 1. specified by timeAgo
+	// 2. last offset timestamp for this directory
+	// 3. directory creation time
+	var lastOffsetTs time.Time
+	if *option.timeAgo == 0 {
+		mountedDirEntry, err := filer_pb.GetEntry(option, util.FullPath(mountedDir))
+		if err != nil {
+			return fmt.Errorf("lookup %s: %v", mountedDir, err)
+		}
+
+		lastOffsetTsNs, err := getOffset(option.grpcDialOption, *option.filerAddress, RemoteSyncKeyPrefix, int32(dirHash))
+		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().Add(-*option.timeAgo)
+	}
+
+	client, err := remote_storage.GetRemoteStorage(remoteStorage)
+	if err != nil {
+		return err
+	}
+
+	eachEntryFunc := func(resp *filer_pb.SubscribeMetadataResponse) error {
+		message := resp.EventNotification
+		if message.OldEntry == nil && message.NewEntry == nil {
+			return nil
+		}
+		if message.OldEntry == nil && message.NewEntry != nil {
+			if len(message.NewEntry.Chunks) == 0 {
+				return nil
+			}
+			fmt.Printf("create: %+v\n", resp)
+			dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(message.NewParentPath, message.NewEntry.Name), remoteStorageMountLocation)
+			reader := filer.NewChunkStreamReader(filerSource, message.NewEntry.Chunks)
+			return client.WriteFile(dest, message.NewEntry, reader)
+		}
+		if message.OldEntry != nil && message.NewEntry == nil {
+			fmt.Printf("delete: %+v\n", resp)
+			dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(resp.Directory, message.OldEntry.Name), remoteStorageMountLocation)
+			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 resp.Directory == message.NewParentPath && message.OldEntry.Name == message.NewEntry.Name {
+				if isSameChunks(message.OldEntry.Chunks, message.NewEntry.Chunks) {
+					fmt.Printf("update meta: %+v\n", resp)
+					return client.UpdateFileMetadata(dest, message.NewEntry)
+				}
+			}
+			fmt.Printf("update: %+v\n", resp)
+			if err := client.DeleteFile(oldDest); err != nil {
+				return err
+			}
+			reader := filer.NewChunkStreamReader(filerSource, message.NewEntry.Chunks)
+			return client.WriteFile(dest, message.NewEntry, reader)
+		}
+
+		return nil
+	}
+
+	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 setOffset(option.grpcDialOption, *option.filerAddress, RemoteSyncKeyPrefix, int32(dirHash), lastTsNs)
+	})
+
+	return pb.FollowMetadata(*option.filerAddress, option.grpcDialOption,
+		"filer.remote.sync", mountedDir, lastOffsetTs.UnixNano(), 0, processEventFnWithOffset, false)
+}
+
+func toRemoteStorageLocation(mountDir, sourcePath util.FullPath, remoteMountLocation *filer_pb.RemoteStorageLocation) *filer_pb.RemoteStorageLocation {
+	var dest string
+	source := string(sourcePath[len(mountDir):])
+	if strings.HasSuffix(remoteMountLocation.Path, "/") {
+		dest = remoteMountLocation.Path + source[1:]
+	} else {
+		dest = remoteMountLocation.Path + source
+	}
+	return &filer_pb.RemoteStorageLocation{
+		Name:   remoteMountLocation.Name,
+		Bucket: remoteMountLocation.Bucket,
+		Path:   dest,
+	}
+}
+
+func isSameChunks(a, b []*filer_pb.FileChunk) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := 0; i < len(a); i++ {
+		x, y := a[i], b[i]
+		if !proto.Equal(x, y) {
+			return false
+		}
+	}
+	return true
+}

weed/command/filer_replication.go

@@ -7,12 +7,6 @@ import (
 	"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/localsink"
-	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/s3sink"
 	"github.com/chrislusf/seaweedfs/weed/replication/sub"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )

weed/command/imports.go

@@ -0,0 +1,31 @@
+package command
+
+import (
+	_ "net/http/pprof"
+
+	_ "github.com/chrislusf/seaweedfs/weed/remote_storage/s3"
+
+	_ "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/localsink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/s3sink"
+
+	_ "github.com/chrislusf/seaweedfs/weed/filer/cassandra"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/elastic/v7"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/etcd"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/hbase"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb3"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mongodb"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mysql"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mysql2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/sqlite"
+
+)

weed/filer/filer_remote_storage.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/remote_storage"
-	_ "github.com/chrislusf/seaweedfs/weed/remote_storage/s3"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/golang/protobuf/proto"
 	"google.golang.org/grpc"

weed/filer/stream.go

@@ -91,6 +91,7 @@ func ReadAll(masterClient *wdclient.MasterClient, chunks []*filer_pb.FileChunk)
 type ChunkStreamReader struct {
 	chunkViews         []*ChunkView
 	totalSize          int64
+	logicOffset        int64
 	buffer             []byte
 	bufferOffset       int64
 	bufferPos          int
@@ -137,8 +138,7 @@ func NewChunkStreamReader(filerClient filer_pb.FilerClient, chunks []*filer_pb.F
 }
 
 func (c *ChunkStreamReader) ReadAt(p []byte, off int64) (n int, err error) {
-	_, err = c.Seek(off, io.SeekStart)
-	if err != nil {
+	if err = c.prepareBufferFor(c.logicOffset); err != nil {
 		return
 	}
 	return c.Read(p)
@@ -151,12 +151,15 @@ func (c *ChunkStreamReader) Read(p []byte) (n int, err error) {
 				return n, io.EOF
 			}
 			chunkView := c.chunkViews[c.nextChunkViewIndex]
-			c.fetchChunkToBuffer(chunkView)
+			if err = c.fetchChunkToBuffer(chunkView); err != nil {
+				return
+			}
 			c.nextChunkViewIndex++
 		}
 		t := copy(p[n:], c.buffer[c.bufferPos:])
 		c.bufferPos += t
 		n += t
+		c.logicOffset += int64(t)
 	}
 	return
 }
@@ -171,19 +174,26 @@ func (c *ChunkStreamReader) Seek(offset int64, whence int) (int64, error) {
 	switch whence {
 	case io.SeekStart:
 	case io.SeekCurrent:
-		offset += c.bufferOffset + int64(c.bufferPos)
+		offset += c.logicOffset
 	case io.SeekEnd:
 		offset = c.totalSize + offset
 	}
 	if offset > c.totalSize {
 		err = io.ErrUnexpectedEOF
+	} else {
+		c.logicOffset = offset
 	}
 
+	return offset, err
+
+}
+
+func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
 	// stay in the same chunk
 	if !c.isBufferEmpty() {
 		if c.bufferOffset <= offset && offset < c.bufferOffset+int64(len(c.buffer)) {
 			c.bufferPos = int(offset - c.bufferOffset)
-			return offset, nil
+			return nil
 		}
 	}
 
@@ -192,23 +202,21 @@ func (c *ChunkStreamReader) Seek(offset int64, whence int) (int64, error) {
 		return c.chunkViews[i].LogicOffset <= offset
 	})
 	if currentChunkIndex == len(c.chunkViews) {
-		return 0, io.EOF
+		return io.EOF
 	}
 
 	// positioning within the new chunk
 	chunk := c.chunkViews[currentChunkIndex]
 	if chunk.LogicOffset <= offset && offset < chunk.LogicOffset+int64(chunk.Size) {
 		if c.isBufferEmpty() || c.bufferOffset != chunk.LogicOffset {
-			c.fetchChunkToBuffer(chunk)
+			if err = c.fetchChunkToBuffer(chunk); err != nil {
+				return
+			}
 			c.nextChunkViewIndex = currentChunkIndex + 1
 		}
 		c.bufferPos = int(offset - c.bufferOffset)
-	} else {
-		return 0, io.ErrUnexpectedEOF
 	}
-
-	return offset, err
-
+	return
 }
 
 func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {

weed/remote_storage/remote_storage.go

@@ -3,6 +3,7 @@ package remote_storage
 import (
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"io"
 	"strings"
 	"sync"
 )
@@ -30,7 +31,10 @@ type VisitFunc func(dir string, name string, isDirectory bool, remoteEntry *file
 
 type RemoteStorageClient interface {
 	Traverse(loc *filer_pb.RemoteStorageLocation, visitFn VisitFunc) error
-	ReadFile(loc *filer_pb.RemoteStorageLocation, offset int64, size int64) (data[]byte, err error)
+	ReadFile(loc *filer_pb.RemoteStorageLocation, offset int64, size int64) (data []byte, err error)
+	WriteFile(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry, reader io.Reader) (err error)
+	UpdateFileMetadata(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry) (err error)
+	DeleteFile(loc *filer_pb.RemoteStorageLocation) (err error)
 }
 
 type RemoteStorageClientMaker interface {

weed/remote_storage/s3/s3_storage_client.go

@@ -8,9 +8,11 @@ import (
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/aws/aws-sdk-go/service/s3/s3iface"
 	"github.com/aws/aws-sdk-go/service/s3/s3manager"
+	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/remote_storage"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"io"
 )
 
 func init() {
@@ -45,7 +47,9 @@ type s3RemoteStorageClient struct {
 	conn s3iface.S3API
 }
 
-func (s s3RemoteStorageClient) Traverse(remote *filer_pb.RemoteStorageLocation, visitFn remote_storage.VisitFunc) (err error) {
+var _ = remote_storage.RemoteStorageClient(&s3RemoteStorageClient{})
+
+func (s *s3RemoteStorageClient) Traverse(remote *filer_pb.RemoteStorageLocation, visitFn remote_storage.VisitFunc) (err error) {
 
 	pathKey := remote.Path[1:]
 
@@ -91,19 +95,19 @@ func (s s3RemoteStorageClient) Traverse(remote *filer_pb.RemoteStorageLocation,
 	}
 	return
 }
-func (s s3RemoteStorageClient) ReadFile(loc *filer_pb.RemoteStorageLocation, offset int64, size int64) (data[]byte, err error) {
+func (s *s3RemoteStorageClient) ReadFile(loc *filer_pb.RemoteStorageLocation, offset int64, size int64) (data []byte, err error) {
 	downloader := s3manager.NewDownloaderWithClient(s.conn, func(u *s3manager.Downloader) {
 		u.PartSize = int64(4 * 1024 * 1024)
 		u.Concurrency = 1
 	})
-	
+
 	dataSlice := make([]byte, int(size))
 	writerAt := aws.NewWriteAtBuffer(dataSlice)
 
 	_, err = downloader.Download(writerAt, &s3.GetObjectInput{
-		Bucket:                     aws.String(loc.Bucket),
-		Key:                        aws.String(loc.Path[1:]),
-		Range:                      aws.String(fmt.Sprintf("bytes=%d-%d", offset, offset+size-1)),
+		Bucket: aws.String(loc.Bucket),
+		Key:    aws.String(loc.Path[1:]),
+		Range:  aws.String(fmt.Sprintf("bytes=%d-%d", offset, offset+size-1)),
 	})
 	if err != nil {
 		return nil, fmt.Errorf("failed to download file %s%s: %v", loc.Bucket, loc.Path, err)
@@ -111,3 +115,81 @@ func (s s3RemoteStorageClient) ReadFile(loc *filer_pb.RemoteStorageLocation, off
 
 	return writerAt.Bytes(), nil
 }
+
+func (s *s3RemoteStorageClient) WriteFile(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry, reader io.Reader) (err error) {
+
+	fileSize := int64(filer.FileSize(entry))
+
+	partSize := int64(8 * 1024 * 1024) // The minimum/default allowed part size is 5MB
+	for partSize*1000 < fileSize {
+		partSize *= 4
+	}
+
+	// Create an uploader with the session and custom options
+	uploader := s3manager.NewUploaderWithClient(s.conn, func(u *s3manager.Uploader) {
+		u.PartSize = partSize
+		u.Concurrency = 5
+	})
+
+	// process tagging
+	tags := ""
+	for k, v := range entry.Extended {
+		if len(tags) > 0 {
+			tags = tags + "&"
+		}
+		tags = tags + k + "=" + string(v)
+	}
+
+	// Upload the file to S3.
+	_, err = uploader.Upload(&s3manager.UploadInput{
+		Bucket:               aws.String(loc.Bucket),
+		Key:                  aws.String(loc.Path[1:]),
+		Body:                 reader,
+		ACL:                  aws.String("private"),
+		ServerSideEncryption: aws.String("AES256"),
+		StorageClass:         aws.String("STANDARD_IA"),
+		Tagging:              aws.String(tags),
+	})
+
+	//in case it fails to upload
+	if err != nil {
+		return fmt.Errorf("upload to s3 %s/%s%s: %v", loc.Name, loc.Bucket, loc.Path, err)
+	}
+
+	return nil
+}
+
+func toTagging(attributes map[string][]byte) *s3.Tagging {
+	tagging := &s3.Tagging{}
+	for k, v := range attributes {
+		tagging.TagSet = append(tagging.TagSet, &s3.Tag{
+			Key:   aws.String(k),
+			Value: aws.String(string(v)),
+		})
+	}
+	return tagging
+}
+
+func (s *s3RemoteStorageClient) UpdateFileMetadata(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry) (err error) {
+	tagging := toTagging(entry.Extended)
+	if len(tagging.TagSet) > 0 {
+		_, err = s.conn.PutObjectTagging(&s3.PutObjectTaggingInput{
+			Bucket:  aws.String(loc.Bucket),
+			Key:     aws.String(loc.Path[1:]),
+			Tagging: toTagging(entry.Extended),
+		})
+	} else {
+		_, err = s.conn.DeleteObjectTagging(&s3.DeleteObjectTaggingInput{
+			Bucket:  aws.String(loc.Bucket),
+			Key:     aws.String(loc.Path[1:]),
+		})
+	}
+	return
+}
+func (s *s3RemoteStorageClient) DeleteFile(loc *filer_pb.RemoteStorageLocation) (err error) {
+	_, err = s.conn.DeleteObject(&s3.DeleteObjectInput{
+		Bucket: aws.String(loc.Bucket),
+		Key:    aws.String(loc.Path[1:]),
+	})
+	return
+}

weed/shell/command_remote_configure.go

@@ -7,6 +7,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
 	"io"
 	"regexp"
@@ -96,9 +97,15 @@ func (c *commandRemoteConfigure) listExistingRemoteStorages(commandEnv *CommandE
 
 		conf.S3SecretKey = ""
 
-		fmt.Fprintf(writer, "%+v\n", conf)
+		m := jsonpb.Marshaler{
+			EmitDefaults: false,
+			Indent:       "  ",
+		}
 
-		return nil
+		err := m.Marshal(writer, conf)
+		fmt.Fprintln(writer)
+
+		return err
 	})
 
 }

weed/shell/command_remote_mount.go

@@ -88,7 +88,10 @@ func (c *commandRemoteMount) listExistingRemoteStorageMounts(commandEnv *Command
 		Indent:       "  ",
 	}
 
-	return m.Marshal(writer, mappings)
+	err = m.Marshal(writer, mappings)
+	fmt.Fprintln(writer)
+
+	return
 
 }