1 files changed, 105 insertions, 0 deletions
diff --git a/weed/shell/command_volume_configure_replication.go b/weed/shell/command_volume_configure_replication.go
new file mode 100644
index 000000000..6000d0de0
--- /dev/null
+++ b/weed/shell/command_volume_configure_replication.go
@@ -0,0 +1,105 @@
+package shell
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+
+	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+	"github.com/chrislusf/seaweedfs/weed/storage/super_block"
+)
+
+func init() {
+	Commands = append(Commands, &commandVolumeConfigureReplication{})
+}
+
+type commandVolumeConfigureReplication struct {
+}
+
+func (c *commandVolumeConfigureReplication) Name() string {
+	return "volume.configure.replication"
+}
+
+func (c *commandVolumeConfigureReplication) Help() string {
+	return `change volume replication value
+
+	This command changes a volume replication value. It should be followed by volume.fix.replication.
+
+`
+}
+
+func (c *commandVolumeConfigureReplication) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	configureReplicationCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	volumeIdInt := configureReplicationCommand.Int("volumeId", 0, "the volume id")
+	replicationString := configureReplicationCommand.String("replication", "", "the intended replication value")
+	if err = configureReplicationCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	if *replicationString == "" {
+		return fmt.Errorf("empty replication value")
+	}
+
+	replicaPlacement, err := super_block.NewReplicaPlacementFromString(*replicationString)
+	if err != nil {
+		return fmt.Errorf("replication format: %v", err)
+	}
+	replicaPlacementInt32 := uint32(replicaPlacement.Byte())
+
+	var resp *master_pb.VolumeListResponse
+	ctx := context.Background()
+	err = commandEnv.MasterClient.WithClient(ctx, func(client master_pb.SeaweedClient) error {
+		resp, err = client.VolumeList(ctx, &master_pb.VolumeListRequest{})
+		return err
+	})
+	if err != nil {
+		return err
+	}
+
+	vid := needle.VolumeId(*volumeIdInt)
+
+	// find all data nodes with volumes that needs replication change
+	var allLocations []location
+	eachDataNode(resp.TopologyInfo, func(dc string, rack RackId, dn *master_pb.DataNodeInfo) {
+		loc := newLocation(dc, string(rack), dn)
+		for _, v := range dn.VolumeInfos {
+			if v.Id == uint32(vid) && v.ReplicaPlacement != replicaPlacementInt32 {
+				allLocations = append(allLocations, loc)
+				continue
+			}
+		}
+	})
+
+	if len(allLocations) == 0 {
+		return fmt.Errorf("no volume needs change")
+	}
+
+	for _, dst := range allLocations {
+		err := operation.WithVolumeServerClient(dst.dataNode.Id, commandEnv.option.GrpcDialOption, func(ctx context.Context, volumeServerClient volume_server_pb.VolumeServerClient) error {
+			resp, configureErr := volumeServerClient.VolumeConfigure(ctx, &volume_server_pb.VolumeConfigureRequest{
+				VolumeId:    uint32(vid),
+				Replication: replicaPlacement.String(),
+			})
+			if configureErr != nil {
+				return configureErr
+			}
+			if resp.Error != "" {
+				return errors.New(resp.Error)
+			}
+			return nil
+		})
+
+		if err != nil {
+			return err
+		}
+
+	}
+
+	return nil
+}