1 files changed, 113 insertions, 0 deletions
diff --git a/weed/command/filer_remote_gateway.go b/weed/command/filer_remote_gateway.go
new file mode 100644
index 000000000..ea23daf5e
--- /dev/null
+++ b/weed/command/filer_remote_gateway.go
@@ -0,0 +1,113 @@
+package command
+
+import (
+	"context"
+	"fmt"
+	"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/replication/source"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"google.golang.org/grpc"
+	"os"
+	"time"
+)
+
+type RemoteGatewayOptions struct {
+	filerAddress             *string
+	grpcDialOption           grpc.DialOption
+	readChunkFromFiler       *bool
+	timeAgo                  *time.Duration
+	createBucketAt           *string
+	createBucketRandomSuffix *bool
+
+	mappings    *remote_pb.RemoteStorageMapping
+	remoteConfs map[string]*remote_pb.RemoteConf
+	bucketsDir  string
+}
+
+var _ = filer_pb.FilerClient(&RemoteGatewayOptions{})
+
+func (option *RemoteGatewayOptions) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
+	return pb.WithFilerClient(pb.ServerAddress(*option.filerAddress), option.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		return fn(client)
+	})
+}
+func (option *RemoteGatewayOptions) AdjustedUrl(location *filer_pb.Location) string {
+	return location.Url
+}
+
+var (
+	remoteGatewayOptions RemoteGatewayOptions
+)
+
+func init() {
+	cmdFilerRemoteGateway.Run = runFilerRemoteGateway // break init cycle
+	remoteGatewayOptions.filerAddress = cmdFilerRemoteGateway.Flag.String("filer", "localhost:8888", "filer of the SeaweedFS cluster")
+	remoteGatewayOptions.createBucketAt = cmdFilerRemoteGateway.Flag.String("createBucketAt", "", "one remote storage name to create new buckets in")
+	remoteGatewayOptions.createBucketRandomSuffix = cmdFilerRemoteGateway.Flag.Bool("createBucketWithRandomSuffix", true, "add randomized suffix to bucket name to avoid conflicts")
+	remoteGatewayOptions.readChunkFromFiler = cmdFilerRemoteGateway.Flag.Bool("filerProxy", false, "read file chunks from filer instead of volume servers")
+	remoteGatewayOptions.timeAgo = cmdFilerRemoteGateway.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 cmdFilerRemoteGateway = &Command{
+	UsageLine: "filer.remote.gateway",
+	Short:     "resumable continuously write back bucket creation, deletion, and other local updates to remote storage",
+	Long: `resumable continuously write back bucket creation, deletion, and other local updates to remote storage
+
+	filer.remote.gateway listens on filer local buckets update events. 
+	If any bucket is created, deleted, or updated, it will mirror the changes to remote object store.
+
+		weed filer.remote.sync -createBucketAt=cloud1
+
+`,
+}
+
+func runFilerRemoteGateway(cmd *Command, args []string) bool {
+
+	util.LoadConfiguration("security", false)
+	grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
+	remoteGatewayOptions.grpcDialOption = grpcDialOption
+
+	filerAddress := pb.ServerAddress(*remoteGatewayOptions.filerAddress)
+
+	filerSource := &source.FilerSource{}
+	filerSource.DoInitialize(
+		filerAddress.ToHttpAddress(),
+		filerAddress.ToGrpcAddress(),
+		"/", // does not matter
+		*remoteGatewayOptions.readChunkFromFiler,
+	)
+
+	remoteGatewayOptions.bucketsDir = "/buckets"
+	// check buckets again
+	remoteGatewayOptions.WithFilerClient(func(filerClient filer_pb.SeaweedFilerClient) error {
+		resp, err := filerClient.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
+		if err != nil {
+			return err
+		}
+		remoteGatewayOptions.bucketsDir = resp.DirBuckets
+		return nil
+	})
+
+	// read filer remote storage mount mappings
+	if detectErr := remoteGatewayOptions.collectRemoteStorageConf(); detectErr != nil {
+		fmt.Fprintf(os.Stderr, "read mount info: %v\n", detectErr)
+		return true
+	}
+
+	// synchronize /buckets folder
+	fmt.Printf("synchronize buckets in %s ...\n", remoteGatewayOptions.bucketsDir)
+	util.RetryForever("filer.remote.sync buckets", func() error {
+		return remoteGatewayOptions.followBucketUpdatesAndUploadToRemote(filerSource)
+	}, func(err error) bool {
+		if err != nil {
+			glog.Errorf("synchronize %s: %v", remoteGatewayOptions.bucketsDir, err)
+		}
+		return true
+	})
+	return true
+
+}