diff --git a/pkg/configpb/configpb.pb.gw.go b/pkg/configpb/configpb.pb.gw.go
index 9b4675b32..c0385b0e4 100644
--- a/pkg/configpb/configpb.pb.gw.go
+++ b/pkg/configpb/configpb.pb.gw.go
@@ -20,7 +20,6 @@ import (
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/status"
 )
 
@@ -31,7 +30,6 @@ var _ status.Status
 var _ = runtime.String
 var _ = utilities.NewDoubleArray
 var _ = descriptor.ForMessage
-var _ = metadata.Join
 
 var (
 	filter_Config_Get_0 = &utilities.DoubleArray{Encoding: map[string]int{}, Base: []int(nil), Check: []int(nil)}
@@ -57,10 +55,7 @@ func local_request_Config_Get_0(ctx context.Context, marshaler runtime.Marshaler
 	var protoReq GetRequest
 	var metadata runtime.ServerMetadata
 
-	if err := req.ParseForm(); err != nil {
-		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
-	}
-	if err := runtime.PopulateQueryParameters(&protoReq, req.Form, filter_Config_Get_0); err != nil {
+	if err := runtime.PopulateQueryParameters(&protoReq, req.URL.Query(), filter_Config_Get_0); err != nil {
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
 	}
 
@@ -127,10 +122,7 @@ func local_request_Config_Delete_0(ctx context.Context, marshaler runtime.Marsha
 	var protoReq DeleteRequest
 	var metadata runtime.ServerMetadata
 
-	if err := req.ParseForm(); err != nil {
-		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
-	}
-	if err := runtime.PopulateQueryParameters(&protoReq, req.Form, filter_Config_Delete_0); err != nil {
+	if err := runtime.PopulateQueryParameters(&protoReq, req.URL.Query(), filter_Config_Delete_0); err != nil {
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
 	}
 
@@ -142,14 +134,11 @@ func local_request_Config_Delete_0(ctx context.Context, marshaler runtime.Marsha
 // RegisterConfigHandlerServer registers the http handlers for service Config to "mux".
 // UnaryRPC     :call ConfigServer directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
-// Note that using this registration option will cause many gRPC library features to stop working. Consider using RegisterConfigHandlerFromEndpoint instead.
 func RegisterConfigHandlerServer(ctx context.Context, mux *runtime.ServeMux, server ConfigServer) error {
 
 	mux.Handle("GET", pattern_Config_Get_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
 		ctx, cancel := context.WithCancel(req.Context())
 		defer cancel()
-		var stream runtime.ServerTransportStream
-		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
 		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
 		rctx, err := runtime.AnnotateIncomingContext(ctx, mux, req)
 		if err != nil {
@@ -157,7 +146,6 @@ func RegisterConfigHandlerServer(ctx context.Context, mux *runtime.ServeMux, ser
 			return
 		}
 		resp, md, err := local_request_Config_Get_0(rctx, inboundMarshaler, server, req, pathParams)
-		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
 		ctx = runtime.NewServerMetadataContext(ctx, md)
 		if err != nil {
 			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
@@ -171,8 +159,6 @@ func RegisterConfigHandlerServer(ctx context.Context, mux *runtime.ServeMux, ser
 	mux.Handle("POST", pattern_Config_Update_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
 		ctx, cancel := context.WithCancel(req.Context())
 		defer cancel()
-		var stream runtime.ServerTransportStream
-		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
 		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
 		rctx, err := runtime.AnnotateIncomingContext(ctx, mux, req)
 		if err != nil {
@@ -180,7 +166,6 @@ func RegisterConfigHandlerServer(ctx context.Context, mux *runtime.ServeMux, ser
 			return
 		}
 		resp, md, err := local_request_Config_Update_0(rctx, inboundMarshaler, server, req, pathParams)
-		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
 		ctx = runtime.NewServerMetadataContext(ctx, md)
 		if err != nil {
 			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
@@ -194,8 +179,6 @@ func RegisterConfigHandlerServer(ctx context.Context, mux *runtime.ServeMux, ser
 	mux.Handle("DELETE", pattern_Config_Delete_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
 		ctx, cancel := context.WithCancel(req.Context())
 		defer cancel()
-		var stream runtime.ServerTransportStream
-		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
 		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
 		rctx, err := runtime.AnnotateIncomingContext(ctx, mux, req)
 		if err != nil {
@@ -203,7 +186,6 @@ func RegisterConfigHandlerServer(ctx context.Context, mux *runtime.ServeMux, ser
 			return
 		}
 		resp, md, err := local_request_Config_Delete_0(rctx, inboundMarshaler, server, req, pathParams)
-		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
 		ctx = runtime.NewServerMetadataContext(ctx, md)
 		if err != nil {
 			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
diff --git a/pkg/metapb/metapb.pb.go b/pkg/metapb/metapb.pb.go
index 7a962f0e8..293d72560 100644
--- a/pkg/metapb/metapb.pb.go
+++ b/pkg/metapb/metapb.pb.go
@@ -637,6 +637,7 @@ type Region struct {
 	IsInFlashback bool `protobuf:"varint,7,opt,name=is_in_flashback,json=isInFlashback,proto3" json:"is_in_flashback,omitempty"`
 	// The start_ts that the current flashback progress is using.
 	FlashbackStartTs     uint64   `protobuf:"varint,8,opt,name=flashback_start_ts,json=flashbackStartTs,proto3" json:"flashback_start_ts,omitempty"`
+	Leader               *Peer    `protobuf:"bytes,9,opt,name=leader,proto3" json:"leader,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -731,6 +732,13 @@ func (m *Region) GetFlashbackStartTs() uint64 {
 	return 0
 }
 
+func (m *Region) GetLeader() *Peer {
+	if m != nil {
+		return m.Leader
+	}
+	return nil
+}
+
 type Peer struct {
 	Id                   uint64   `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
 	StoreId              uint64   `protobuf:"varint,2,opt,name=store_id,json=storeId,proto3" json:"store_id,omitempty"`
@@ -819,69 +827,69 @@ func init() {
 func init() { proto.RegisterFile("metapb.proto", fileDescriptor_77b4d575d5a68dda) }
 
 var fileDescriptor_77b4d575d5a68dda = []byte{
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+	0x2d, 0x64, 0x1e, 0x35, 0xdd, 0x7d, 0xa5, 0xc9, 0x3e, 0x80, 0x0e, 0xbd, 0xbd, 0x2a, 0xa7, 0x45,
+	0x74, 0x68, 0xb1, 0xaf, 0xcb, 0x92, 0x3e, 0x84, 0x9e, 0xbd, 0x71, 0xa5, 0xb7, 0x4e, 0x6d, 0x72,
+	0xea, 0x3a, 0xb4, 0x72, 0xdb, 0x03, 0x7f, 0x26, 0x4c, 0x32, 0xe7, 0x7a, 0x1e, 0xf9, 0xee, 0x92,
+	0x99, 0x30, 0xa7, 0x5c, 0xcf, 0xd9, 0x47, 0xb0, 0xa3, 0x0d, 0x57, 0x26, 0x31, 0x62, 0x89, 0xda,
+	0xf0, 0x65, 0x11, 0x05, 0x03, 0x6f, 0x54, 0x8f, 0x7b, 0x04, 0xbf, 0xac, 0x50, 0xf6, 0x3e, 0x84,
+	0x29, 0x16, 0x99, 0xdc, 0x24, 0x05, 0x37, 0xf3, 0x08, 0x28, 0x0d, 0x38, 0xe8, 0x8c, 0x9b, 0xb9,
+	0xad, 0x25, 0xe3, 0xda, 0x24, 0x73, 0xe4, 0xca, 0x4c, 0x90, 0x9b, 0x28, 0xa4, 0x44, 0x5d, 0x8b,
+	0x9e, 0x56, 0x20, 0xfb, 0x0c, 0x76, 0x8b, 0xf9, 0x46, 0x8b, 0x29, 0xcf, 0xb2, 0x4d, 0x92, 0xa2,
+	0x36, 0x4a, 0x6e, 0x30, 0x8d, 0x3a, 0x03, 0x6f, 0xe4, 0xc7, 0xf7, 0xde, 0x72, 0x4f, 0x2b, 0x8a,
+	0x3d, 0x06, 0xc8, 0x65, 0x8a, 0x89, 0x53, 0xbf, 0x4b, 0xea, 0xdf, 0xad, 0x24, 0xfd, 0x56, 0xa6,
+	0xa5, 0xf8, 0x41, 0x5e, 0x1d, 0x87, 0xc7, 0x10, 0xc6, 0x38, 0x13, 0x32, 0x3f, 0x29, 0xe4, 0x74,
+	0x6e, 0xdf, 0x3f, 0x95, 0xf9, 0x45, 0xb2, 0x46, 0x55, 0x7e, 0xe9, 0xb6, 0xb5, 0x5f, 0xa1, 0xba,
+	0x2a, 0x7f, 0xcd, 0x31, 0xa5, 0x39, 0xfc, 0xcd, 0x83, 0xf0, 0x78, 0x35, 0x5d, 0xa0, 0xb1, 0x39,
+	0x35, 0x7b, 0x0f, 0x40, 0x21, 0x4f, 0x93, 0xc9, 0xc6, 0xa0, 0x8e, 0xbc, 0x41, 0x7d, 0xd4, 0x88,
+	0x03, 0x8b, 0x1c, 0x5b, 0xc0, 0xea, 0xf3, 0x5a, 0x09, 0x83, 0x25, 0x5f, 0x23, 0x1e, 0x08, 0x72,
+	0x0e, 0x7b, 0xe0, 0x53, 0xfc, 0x4f, 0x85, 0x8e, 0xea, 0xc4, 0xb6, 0xad, 0xfd, 0x7d, 0xa1, 0xd9,
+	0x03, 0x08, 0x5c, 0xac, 0xe5, 0x1a, 0xc4, 0xf9, 0x04, 0x94, 0x24, 0xc5, 0x2d, 0x70, 0xa3, 0xa3,
+	0xa6, 0x23, 0x2d, 0xf0, 0x0c, 0x37, 0x54, 0x94, 0x8b, 0x24, 0xb6, 0xe5, 0x8a, 0x22, 0xc4, 0xd2,
+	0xc3, 0x5f, 0x3c, 0x68, 0xbb, 0x37, 0x94, 0x79, 0xac, 0x26, 0xc9, 0xb6, 0xdf, 0x7d, 0x07, 0x8c,
+	0xd3, 0xff, 0x97, 0x81, 0x31, 0x68, 0x50, 0x6e, 0x5b, 0x72, 0x27, 0xa6, 0x33, 0xfb, 0xd8, 0x4d,
+	0x82, 0xad, 0xd5, 0x1b, 0x85, 0x47, 0xf7, 0xaa, 0x6f, 0x71, 0x45, 0x2e, 0x37, 0x0a, 0x9a, 0x0d,
+	0x6c, 0x13, 0x2b, 0x21, 0xd3, 0x44, 0xe4, 0xc9, 0x52, 0x53, 0x8f, 0x37, 0x62, 0x70, 0xd8, 0x38,
+	0x7f, 0xa1, 0x87, 0xff, 0xd6, 0xa0, 0xe5, 0x3e, 0xd6, 0xad, 0x59, 0x7c, 0x00, 0x81, 0x6b, 0x4e,
+	0x3b, 0xd3, 0xb6, 0xae, 0x4e, 0xec, 0x13, 0xf0, 0x0c, 0x37, 0xec, 0x1d, 0x68, 0x63, 0x4e, 0xb2,
+	0xd0, 0x40, 0x76, 0xe2, 0x16, 0xe6, 0x56, 0x14, 0xf6, 0x25, 0x74, 0xca, 0x87, 0xa2, 0xfd, 0xfa,
+	0x37, 0x8b, 0xbc, 0xd2, 0x18, 0x71, 0xa8, 0xae, 0x74, 0xc9, 0x10, 0x9a, 0x76, 0xb6, 0x9c, 0xc8,
+	0xe1, 0x51, 0xa7, 0x0a, 0xb0, 0xbb, 0x26, 0x76, 0x14, 0x3b, 0x81, 0x9d, 0xb7, 0xbb, 0x2e, 0xb1,
+	0x0e, 0x34, 0x96, 0xe1, 0xd1, 0xbb, 0x87, 0xd7, 0x76, 0xe0, 0xc9, 0xd6, 0x78, 0x81, 0x86, 0xc7,
+	0x3d, 0xbc, 0x66, 0xb3, 0x47, 0xb0, 0x23, 0xb4, 0x55, 0xe4, 0x22, 0xe3, 0x7a, 0x3e, 0xe1, 0xd3,
+	0x05, 0x0d, 0xae, 0x1f, 0x77, 0x85, 0x1e, 0xe7, 0xdf, 0x54, 0x20, 0xfb, 0x04, 0xd8, 0xd6, 0x23,
+	0x29, 0xe7, 0x54, 0xd3, 0x08, 0x37, 0xe2, 0xfe, 0x96, 0x39, 0xa7, 0x49, 0xd5, 0xec, 0x21, 0xb4,
+	0x32, 0xe4, 0x29, 0x2a, 0x1a, 0xe1, 0x9b, 0x2f, 0x28, 0xb9, 0xe1, 0x1a, 0x1a, 0xd6, 0xbe, 0x25,
+	0xf6, 0x1e, 0xf8, 0xda, 0xae, 0x27, 0xdb, 0x1e, 0x65, 0x0f, 0x90, 0x3d, 0xb6, 0x9b, 0xb8, 0xa1,
+	0x64, 0x56, 0x2d, 0xbe, 0xfe, 0xb5, 0xb4, 0x32, 0xc3, 0x98, 0x58, 0xdb, 0x8b, 0x42, 0x27, 0xaf,
+	0x85, 0xc9, 0xed, 0x22, 0x6a, 0xd0, 0x7b, 0x02, 0xa1, 0x7f, 0x74, 0xc0, 0xc1, 0xe3, 0x72, 0x51,
+	0xd3, 0x84, 0xb2, 0x16, 0xd4, 0x7e, 0x28, 0xfa, 0x77, 0x58, 0x08, 0xed, 0xef, 0x2e, 0x2e, 0x32,
+	0x91, 0x63, 0xdf, 0x63, 0x5d, 0x08, 0x5e, 0xca, 0xe5, 0x44, 0x1b, 0x99, 0x63, 0xbf, 0x76, 0x70,
+	0x0c, 0xc1, 0x76, 0xba, 0x2d, 0x77, 0xa6, 0xb0, 0xe0, 0x4a, 0xe4, 0x33, 0x17, 0x77, 0x8e, 0x6a,
+	0x6d, 0x0d, 0x8f, 0x75, 0xc0, 0x8f, 0x71, 0x29, 0xc9, 0xaa, 0x59, 0x8a, 0x2c, 0x4c, 0xfb, 0xf5,
+	0x83, 0x53, 0xf0, 0xab, 0x32, 0x59, 0x00, 0xcd, 0x57, 0xd2, 0xa0, 0x72, 0xe1, 0xcf, 0x91, 0xab,
+	0x1c, 0x55, 0xdf, 0x63, 0x77, 0xa1, 0x3b, 0xce, 0xa7, 0x72, 0x29, 0xf2, 0x99, 0xe3, 0x6b, 0x16,
+	0x7a, 0x8a, 0x4b, 0x69, 0xb6, 0x50, 0xfd, 0xf8, 0xd1, 0x9f, 0xbf, 0xfa, 0xde, 0xef, 0x97, 0xfb,
+	0xde, 0x1f, 0x97, 0xfb, 0xde, 0xdf, 0x97, 0xfb, 0xde, 0xcf, 0xff, 0xec, 0xdf, 0x81, 0xbe, 0x54,
+	0xb3, 0x43, 0x23, 0x16, 0xeb, 0xc3, 0xc5, 0x9a, 0xfe, 0xd1, 0x26, 0x2d, 0xfa, 0xf9, 0xfc, 0xbf,
+	0x00, 0x00, 0x00, 0xff, 0xff, 0x3a, 0xbc, 0xf9, 0x64, 0x2b, 0x07, 0x00, 0x00,
 }
 
 func (m *Cluster) Marshal() (dAtA []byte, err error) {
@@ -1339,6 +1347,18 @@ func (m *Region) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
+	if m.Leader != nil {
+		{
+			size, err := m.Leader.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintMetapb(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x4a
+	}
 	if m.FlashbackStartTs != 0 {
 		i = encodeVarintMetapb(dAtA, i, uint64(m.FlashbackStartTs))
 		i--
@@ -1715,6 +1735,10 @@ func (m *Region) Size() (n int) {
 	if m.FlashbackStartTs != 0 {
 		n += 1 + sovMetapb(uint64(m.FlashbackStartTs))
 	}
+	if m.Leader != nil {
+		l = m.Leader.Size()
+		n += 1 + l + sovMetapb(uint64(l))
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -3380,6 +3404,42 @@ func (m *Region) Unmarshal(dAtA []byte) error {
 					break
 				}
 			}
+		case 9:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Leader", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetapb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthMetapb
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthMetapb
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Leader == nil {
+				m.Leader = &Peer{}
+			}
+			if err := m.Leader.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipMetapb(dAtA[iNdEx:])
diff --git a/proto/metapb.proto b/proto/metapb.proto
index ef3c8d45b..38d72865f 100644
--- a/proto/metapb.proto
+++ b/proto/metapb.proto
@@ -127,6 +127,7 @@ message Region {
     bool is_in_flashback  = 7;
     // The start_ts that the current flashback progress is using.
     uint64 flashback_start_ts = 8;
+    Peer leader = 9;
 }
 
 enum PeerRole {
diff --git a/scripts/proto.lock b/scripts/proto.lock
index fd59f9c7f..d3d571f6b 100644
--- a/scripts/proto.lock
+++ b/scripts/proto.lock
@@ -12566,6 +12566,11 @@
                 "id": 8,
                 "name": "flashback_start_ts",
                 "type": "uint64"
+              },
+              {
+                "id": 9,
+                "name": "leader",
+                "type": "Peer"
               }
             ]
           },