allocate brokers to serve segments

weed/cluster/cluster.go

@@ -49,15 +49,15 @@ func newClusterNodeGroups() *ClusterNodeGroups {
 	}
 }
 func (g *ClusterNodeGroups) getGroupMembers(filerGroup FilerGroupName, createIfNotFound bool) *GroupMembers {
-	filers, found := g.groupMembers[filerGroup]
+	members, found := g.groupMembers[filerGroup]
 	if !found && createIfNotFound {
-		filers = &GroupMembers{
+		members = &GroupMembers{
 			members: make(map[pb.ServerAddress]*ClusterNode),
 			leaders: &Leaders{},
 		}
-		g.groupMembers[filerGroup] = filers
+		g.groupMembers[filerGroup] = members
 	}
-	return filers
+	return members
 }
 
 func (m *GroupMembers) addMember(dataCenter DataCenter, rack Rack, address pb.ServerAddress, version string) *ClusterNode {
@@ -131,6 +131,16 @@ func (g *ClusterNodeGroups) IsOneLeader(filerGroup FilerGroupName, address pb.Se
 	}
 	return m.leaders.isOneLeader(address)
 }
+func (g *ClusterNodeGroups) ListClusterNodeLeaders(filerGroup FilerGroupName) (nodes []pb.ServerAddress) {
+	g.Lock()
+	defer g.Unlock()
+	m := g.getGroupMembers(filerGroup, false)
+	if m == nil {
+		return nil
+	}
+	return m.leaders.GetLeaders()
+}
+
 func NewCluster() *Cluster {
 	return &Cluster{
 		filerGroups:  newClusterNodeGroups(),
@@ -201,6 +211,17 @@ func (cluster *Cluster) ListClusterNode(filerGroup FilerGroupName, nodeType stri
 	return
 }
 
+func (cluster *Cluster) ListClusterNodeLeaders(filerGroup FilerGroupName, nodeType string) (nodes []pb.ServerAddress) {
+	switch nodeType {
+	case FilerType:
+		return cluster.filerGroups.ListClusterNodeLeaders(filerGroup)
+	case BrokerType:
+		return cluster.brokerGroups.ListClusterNodeLeaders(filerGroup)
+	case MasterType:
+	}
+	return
+}
+
 func (cluster *Cluster) IsOneLeader(filerGroup FilerGroupName, nodeType string, address pb.ServerAddress) bool {
 	switch nodeType {
 	case FilerType:

weed/mq/broker/brokder_grpc_admin.go

@@ -2,9 +2,211 @@ package broker
 
 import (
 	"context"
+	"github.com/chrislusf/seaweedfs/weed/cluster"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/mq"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/mq_pb"
+	"sort"
+	"sync"
 )
 
 func (broker *MessageQueueBroker) FindBrokerLeader(c context.Context, request *mq_pb.FindBrokerLeaderRequest) (*mq_pb.FindBrokerLeaderResponse, error) {
-	panic("implement me")
+	ret := &mq_pb.FindBrokerLeaderResponse{}
+	err := broker.withMasterClient(false, broker.MasterClient.GetMaster(), func(client master_pb.SeaweedClient) error {
+		resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
+			ClientType:   cluster.BrokerType,
+			FilerGroup:   request.FilerGroup,
+			IsLeaderOnly: true,
+		})
+		if err != nil {
+			return err
+		}
+		if len(resp.ClusterNodes) == 0 {
+			return nil
+		}
+		ret.Broker = resp.ClusterNodes[0].Address
+		return nil
+	})
+	return ret, err
+}
+
+func (broker *MessageQueueBroker) CheckSegmentStatus(c context.Context, request *mq_pb.CheckSegmentStatusRequest) (*mq_pb.CheckSegmentStatusResponse, error) {
+	ret := &mq_pb.CheckSegmentStatusResponse{}
+	// TODO add in memory active segment
+	return ret, nil
+}
+
+func (broker *MessageQueueBroker) CheckBrokerLoad(c context.Context, request *mq_pb.CheckBrokerLoadRequest) (*mq_pb.CheckBrokerLoadResponse, error) {
+	ret := &mq_pb.CheckBrokerLoadResponse{}
+	// TODO read broker's load
+	return ret, nil
+}
+
+func (broker *MessageQueueBroker) AssignSegmentBrokers(c context.Context, request *mq_pb.AssignSegmentBrokersRequest) (*mq_pb.AssignSegmentBrokersResponse, error) {
+	ret := &mq_pb.AssignSegmentBrokersResponse{}
+	segment := mq.FromPbSegment(request.Segment)
+
+	// check existing segment locations on filer
+	existingBrokers, err := broker.checkSegmentOnFiler(segment)
+	if err != nil {
+		return ret, err
+	}
+	// good if the segment is still on the brokers
+	isActive, err := broker.checkSegmentsOnBrokers(segment, existingBrokers)
+	if err != nil {
+		return ret, err
+	}
+	if isActive {
+		for _, broker := range existingBrokers {
+			ret.Brokers = append(ret.Brokers, string(broker))
+		}
+		return ret, nil
+	}
+
+	// randomly pick up to 10 brokers, and find the ones with the lightest load
+	selectedBrokers, err := broker.selectBrokers()
+	if err != nil {
+		return ret, err
+	}
+
+	// save the allocated brokers info for this segment on the filer
+	if err := broker.saveSegmentOnFiler(segment, selectedBrokers); err != nil {
+		return ret, err
+	}
+
+	for _, broker := range selectedBrokers {
+		ret.Brokers = append(ret.Brokers, string(broker))
+	}
+	return ret, nil
+}
+
+func (broker *MessageQueueBroker) checkSegmentOnFiler(segment *mq.Segment) (brokers []pb.ServerAddress, err error) {
+	return
+}
+
+func (broker *MessageQueueBroker) checkSegmentsOnBrokers(segment *mq.Segment, brokers []pb.ServerAddress) (active bool, err error) {
+	var wg sync.WaitGroup
+
+	for _, candidate := range brokers {
+		wg.Add(1)
+		go func(candidate pb.ServerAddress) {
+			defer wg.Done()
+			broker.withBrokerClient(false, candidate, func(client mq_pb.SeaweedMessagingClient) error {
+				resp, checkErr := client.CheckSegmentStatus(context.Background(), &mq_pb.CheckSegmentStatusRequest{
+					Segment: &mq_pb.Segment{
+						Namespace: string(segment.Topic.Namespace),
+						Topic:     segment.Topic.Name,
+						Id:        segment.Id,
+					},
+				})
+				if checkErr != nil {
+					err = checkErr
+					glog.V(0).Infof("check segment status on %s: %v", candidate, checkErr)
+					return nil
+				}
+				if resp.IsActive == false {
+					active = false
+				}
+				return nil
+			})
+		}(candidate)
+	}
+	wg.Wait()
+	return
+}
+
+func (broker *MessageQueueBroker) selectBrokers() (brokers []pb.ServerAddress, err error) {
+	candidates, err := broker.selectCandidatesFromMaster(10)
+	if err != nil {
+		return
+	}
+	brokers, err = broker.pickLightestCandidates(candidates, 3)
+	return
+}
+
+func (broker *MessageQueueBroker) selectCandidatesFromMaster(limit int32) (candidates []pb.ServerAddress, err error) {
+	err = broker.withMasterClient(false, broker.MasterClient.GetMaster(), func(client master_pb.SeaweedClient) error {
+		resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
+			ClientType: cluster.BrokerType,
+			FilerGroup: broker.option.FilerGroup,
+			Limit:      limit,
+		})
+		if err != nil {
+			return err
+		}
+		if len(resp.ClusterNodes) == 0 {
+			return nil
+		}
+		for _, node := range resp.ClusterNodes {
+			candidates = append(candidates, pb.ServerAddress(node.Address))
+		}
+		return nil
+	})
+	return
+}
+
+type CandidateStatus struct {
+	address      pb.ServerAddress
+	messageCount int64
+	bytesCount   int64
+	load         int64
+}
+
+func (broker *MessageQueueBroker) pickLightestCandidates(candidates []pb.ServerAddress, limit int) (selected []pb.ServerAddress, err error) {
+
+	if len(candidates) <= limit {
+		return candidates, nil
+	}
+
+	candidateStatuses, err := broker.checkBrokerStatus(candidates)
+	if err != nil {
+		return nil, err
+	}
+
+	sort.Slice(candidateStatuses, func(i, j int) bool {
+		return candidateStatuses[i].load < candidateStatuses[j].load
+	})
+
+	for i, candidate := range candidateStatuses {
+		if i >= limit {
+			break
+		}
+		selected = append(selected, candidate.address)
+	}
+
+	return
+}
+
+func (broker *MessageQueueBroker) checkBrokerStatus(candidates []pb.ServerAddress) (candidateStatuses []*CandidateStatus, err error) {
+
+	candidateStatuses = make([]*CandidateStatus, len(candidates))
+	var wg sync.WaitGroup
+	for i, candidate := range candidates {
+		wg.Add(1)
+		go func(i int, candidate pb.ServerAddress) {
+			defer wg.Done()
+			err = broker.withBrokerClient(false, candidate, func(client mq_pb.SeaweedMessagingClient) error {
+				resp, checkErr := client.CheckBrokerLoad(context.Background(), &mq_pb.CheckBrokerLoadRequest{})
+				if checkErr != nil {
+					err = checkErr
+					return err
+				}
+				candidateStatuses[i] = &CandidateStatus{
+					address:      candidate,
+					messageCount: resp.MessageCount,
+					bytesCount:   resp.BytesCount,
+					load:         resp.MessageCount + resp.BytesCount/(64*1024),
+				}
+				return nil
+			})
+		}(i, candidate)
+	}
+	wg.Wait()
+	return
+}
+
+func (broker *MessageQueueBroker) saveSegmentOnFiler(segment *mq.Segment, brokers []pb.ServerAddress) (err error) {
+	return
 }

weed/mq/broker/broker_server.go

@@ -59,3 +59,11 @@ func (broker *MessageQueueBroker) withMasterClient(streamingMode bool, master pb
 	})
 
 }
+
+func (broker *MessageQueueBroker) withBrokerClient(streamingMode bool, server pb.ServerAddress, fn func(client mq_pb.SeaweedMessagingClient) error) error {
+
+	return pb.WithBrokerClient(streamingMode, server, broker.grpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
+		return fn(client)
+	})
+
+}

weed/mq/topic.go

@@ -1,23 +1,36 @@
 package mq
 
-import "time"
+import (
+	"github.com/chrislusf/seaweedfs/weed/pb/mq_pb"
+	"time"
+)
 
 type Namespace string
 
 type Topic struct {
-	namespace Namespace
-	name      string
+	Namespace Namespace
+	Name      string
 }
 
 type Partition struct {
-	rangeStart int
-	rangeStop  int // exclusive
-	ringSize   int
+	RangeStart int
+	RangeStop  int // exclusive
+	RingSize   int
 }
 
 type Segment struct {
-	topic        Topic
-	id           int32
-	partition    Partition
-	lastModified time.Time
+	Topic        Topic
+	Id           int32
+	Partition    Partition
+	LastModified time.Time
+}
+
+func FromPbSegment(segment *mq_pb.Segment) *Segment {
+	return &Segment{
+		Topic: Topic{
+			Namespace: Namespace(segment.Namespace),
+			Name:      segment.Topic,
+		},
+		Id: segment.Id,
+	}
 }

weed/pb/grpc_client_server.go

@@ -216,6 +216,14 @@ func WithVolumeServerClient(streamingMode bool, volumeServer ServerAddress, grpc
 
 }
 
+func WithBrokerClient(streamingMode bool, broker ServerAddress, grpcDialOption grpc.DialOption, fn func(client mq_pb.SeaweedMessagingClient) error) error {
+	return WithGrpcClient(streamingMode, func(grpcConnection *grpc.ClientConn) error {
+		client := mq_pb.NewSeaweedMessagingClient(grpcConnection)
+		return fn(client)
+	}, broker.ToGrpcAddress(), grpcDialOption)
+
+}
+
 func WithOneOfGrpcMasterClients(streamingMode bool, masterGrpcAddresses map[string]ServerAddress, grpcDialOption grpc.DialOption, fn func(client master_pb.SeaweedClient) error) (err error) {
 
 	for _, masterGrpcAddress := range masterGrpcAddresses {

weed/pb/master.proto

@@ -317,6 +317,8 @@ message GetMasterConfigurationResponse {
 message ListClusterNodesRequest {
   string client_type = 1;
   string filer_group = 2;
+  bool is_leader_only = 3;
+  int32 limit = 4;
 }
 message ListClusterNodesResponse {
   message ClusterNode {

weed/pb/master_pb/master.pb.go

@@ -2634,6 +2634,8 @@ type ListClusterNodesRequest struct {
 
 	ClientType   string `protobuf:"bytes,1,opt,name=client_type,json=clientType,proto3" json:"client_type,omitempty"`
 	FilerGroup   string `protobuf:"bytes,2,opt,name=filer_group,json=filerGroup,proto3" json:"filer_group,omitempty"`
+	IsLeaderOnly bool   `protobuf:"varint,3,opt,name=is_leader_only,json=isLeaderOnly,proto3" json:"is_leader_only,omitempty"`
+	Limit        int32  `protobuf:"varint,4,opt,name=limit,proto3" json:"limit,omitempty"`
 }
 
 func (x *ListClusterNodesRequest) Reset() {
@@ -2682,6 +2684,20 @@ func (x *ListClusterNodesRequest) GetFilerGroup() string {
 	return ""
 }
 
+func (x *ListClusterNodesRequest) GetIsLeaderOnly() bool {
+	if x != nil {
+		return x.IsLeaderOnly
+	}
+	return false
+}
+
+func (x *ListClusterNodesRequest) GetLimit() int32 {
+	if x != nil {
+		return x.Limit
+	}
+	return 0
+}
+
 type ListClusterNodesResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -4165,204 +4181,207 @@ var file_master_proto_rawDesc = []byte{
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+	0x2e, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x52, 0x61, 0x66, 0x74, 0x41,
+	0x64, 0x64, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a,
+	0x20, 0x2e, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x52, 0x61, 0x66, 0x74,
+	0x41, 0x64, 0x64, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73,
+	0x65, 0x22, 0x00, 0x12, 0x5d, 0x0a, 0x10, 0x52, 0x61, 0x66, 0x74, 0x52, 0x65, 0x6d, 0x6f, 0x76,
+	0x65, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x12, 0x22, 0x2e, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72,
+	0x5f, 0x70, 0x62, 0x2e, 0x52, 0x61, 0x66, 0x74, 0x52, 0x65, 0x6d, 0x6f, 0x76, 0x65, 0x53, 0x65,
+	0x72, 0x76, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x23, 0x2e, 0x6d, 0x61,
+	0x73, 0x74, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x52, 0x61, 0x66, 0x74, 0x52, 0x65, 0x6d, 0x6f,
+	0x76, 0x65, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65,
+	0x22, 0x00, 0x42, 0x32, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d,
+	0x2f, 0x63, 0x68, 0x72, 0x69, 0x73, 0x6c, 0x75, 0x73, 0x66, 0x2f, 0x73, 0x65, 0x61, 0x77, 0x65,
+	0x65, 0x64, 0x66, 0x73, 0x2f, 0x77, 0x65, 0x65, 0x64, 0x2f, 0x70, 0x62, 0x2f, 0x6d, 0x61, 0x73,
+	0x74, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

weed/pb/mq.proto

@@ -10,7 +10,13 @@ option java_outer_classname = "MessagQueueProto";
 
 service SeaweedMessaging {
 
-    rpc FindBrokerLeader (FindBrokerLeader) returns (FindBrokerLeaderResponse) {
+    rpc FindBrokerLeader (FindBrokerLeaderRequest) returns (FindBrokerLeaderResponse) {
+    }
+    rpc AssignSegmentBrokers (AssignSegmentBrokersRequest) returns (AssignSegmentBrokersResponse) {
+    }
+    rpc CheckSegmentStatus (CheckSegmentStatusRequest) returns (CheckSegmentStatusResponse) {
+    }
+    rpc CheckBrokerLoad (CheckBrokerLoadRequest) returns (CheckBrokerLoadResponse) {
     }
 
 }
@@ -18,8 +24,47 @@ service SeaweedMessaging {
 //////////////////////////////////////////////////
 
 message FindBrokerLeaderRequest {
+    string filer_group = 1;
 }
 
 message FindBrokerLeaderResponse {
     string broker = 1;
 }
+
+message Partition {
+    int32 ring_size = 1;
+    int32 range_start = 2;
+    int32 range_stop = 3;
+}
+
+message Segment {
+    string namespace = 1;
+    string topic = 2;
+    int32 id = 3;
+    Partition partition = 4;
+}
+
+message AssignSegmentBrokersRequest {
+    Segment segment = 1;
+}
+
+message AssignSegmentBrokersResponse {
+    repeated string brokers = 1;
+}
+
+message CheckSegmentStatusRequest {
+    Segment segment = 1;
+}
+
+message CheckSegmentStatusResponse {
+    bool is_active = 1;
+}
+
+message CheckBrokerLoadRequest {
+}
+
+message CheckBrokerLoadResponse {
+    int64 message_count = 1;
+    int64 bytes_count = 2;
+
+}

weed/pb/mq_pb/mq.pb.go

@@ -24,6 +24,8 @@ type FindBrokerLeaderRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
+
+	FilerGroup string `protobuf:"bytes,1,opt,name=filer_group,json=filerGroup,proto3" json:"filer_group,omitempty"`
 }
 
 func (x *FindBrokerLeaderRequest) Reset() {
@@ -58,6 +60,13 @@ func (*FindBrokerLeaderRequest) Descriptor() ([]byte, []int) {
 	return file_mq_proto_rawDescGZIP(), []int{0}
 }
 
+func (x *FindBrokerLeaderRequest) GetFilerGroup() string {
+	if x != nil {
+		return x.FilerGroup
+	}
+	return ""
+}
+
 type FindBrokerLeaderResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -105,29 +114,506 @@ func (x *FindBrokerLeaderResponse) GetBroker() string {
 	return ""
 }
 
+type Partition struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	RingSize   int32 `protobuf:"varint,1,opt,name=ring_size,json=ringSize,proto3" json:"ring_size,omitempty"`
+	RangeStart int32 `protobuf:"varint,2,opt,name=range_start,json=rangeStart,proto3" json:"range_start,omitempty"`
+	RangeStop  int32 `protobuf:"varint,3,opt,name=range_stop,json=rangeStop,proto3" json:"range_stop,omitempty"`
+}
+
+func (x *Partition) Reset() {
+	*x = Partition{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Partition) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Partition) ProtoMessage() {}
+
+func (x *Partition) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Partition.ProtoReflect.Descriptor instead.
+func (*Partition) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Partition) GetRingSize() int32 {
+	if x != nil {
+		return x.RingSize
+	}
+	return 0
+}
+
+func (x *Partition) GetRangeStart() int32 {
+	if x != nil {
+		return x.RangeStart
+	}
+	return 0
+}
+
+func (x *Partition) GetRangeStop() int32 {
+	if x != nil {
+		return x.RangeStop
+	}
+	return 0
+}
+
+type Segment struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Namespace string     `protobuf:"bytes,1,opt,name=namespace,proto3" json:"namespace,omitempty"`
+	Topic     string     `protobuf:"bytes,2,opt,name=topic,proto3" json:"topic,omitempty"`
+	Id        int32      `protobuf:"varint,3,opt,name=id,proto3" json:"id,omitempty"`
+	Partition *Partition `protobuf:"bytes,4,opt,name=partition,proto3" json:"partition,omitempty"`
+}
+
+func (x *Segment) Reset() {
+	*x = Segment{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Segment) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Segment) ProtoMessage() {}
+
+func (x *Segment) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Segment.ProtoReflect.Descriptor instead.
+func (*Segment) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *Segment) GetNamespace() string {
+	if x != nil {
+		return x.Namespace
+	}
+	return ""
+}
+
+func (x *Segment) GetTopic() string {
+	if x != nil {
+		return x.Topic
+	}
+	return ""
+}
+
+func (x *Segment) GetId() int32 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+func (x *Segment) GetPartition() *Partition {
+	if x != nil {
+		return x.Partition
+	}
+	return nil
+}
+
+type AssignSegmentBrokersRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Segment *Segment `protobuf:"bytes,1,opt,name=segment,proto3" json:"segment,omitempty"`
+}
+
+func (x *AssignSegmentBrokersRequest) Reset() {
+	*x = AssignSegmentBrokersRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AssignSegmentBrokersRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AssignSegmentBrokersRequest) ProtoMessage() {}
+
+func (x *AssignSegmentBrokersRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AssignSegmentBrokersRequest.ProtoReflect.Descriptor instead.
+func (*AssignSegmentBrokersRequest) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *AssignSegmentBrokersRequest) GetSegment() *Segment {
+	if x != nil {
+		return x.Segment
+	}
+	return nil
+}
+
+type AssignSegmentBrokersResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Brokers []string `protobuf:"bytes,1,rep,name=brokers,proto3" json:"brokers,omitempty"`
+}
+
+func (x *AssignSegmentBrokersResponse) Reset() {
+	*x = AssignSegmentBrokersResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AssignSegmentBrokersResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AssignSegmentBrokersResponse) ProtoMessage() {}
+
+func (x *AssignSegmentBrokersResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AssignSegmentBrokersResponse.ProtoReflect.Descriptor instead.
+func (*AssignSegmentBrokersResponse) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *AssignSegmentBrokersResponse) GetBrokers() []string {
+	if x != nil {
+		return x.Brokers
+	}
+	return nil
+}
+
+type CheckSegmentStatusRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Segment *Segment `protobuf:"bytes,1,opt,name=segment,proto3" json:"segment,omitempty"`
+}
+
+func (x *CheckSegmentStatusRequest) Reset() {
+	*x = CheckSegmentStatusRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CheckSegmentStatusRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CheckSegmentStatusRequest) ProtoMessage() {}
+
+func (x *CheckSegmentStatusRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CheckSegmentStatusRequest.ProtoReflect.Descriptor instead.
+func (*CheckSegmentStatusRequest) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *CheckSegmentStatusRequest) GetSegment() *Segment {
+	if x != nil {
+		return x.Segment
+	}
+	return nil
+}
+
+type CheckSegmentStatusResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	IsActive bool `protobuf:"varint,1,opt,name=is_active,json=isActive,proto3" json:"is_active,omitempty"`
+}
+
+func (x *CheckSegmentStatusResponse) Reset() {
+	*x = CheckSegmentStatusResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CheckSegmentStatusResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CheckSegmentStatusResponse) ProtoMessage() {}
+
+func (x *CheckSegmentStatusResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[7]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CheckSegmentStatusResponse.ProtoReflect.Descriptor instead.
+func (*CheckSegmentStatusResponse) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *CheckSegmentStatusResponse) GetIsActive() bool {
+	if x != nil {
+		return x.IsActive
+	}
+	return false
+}
+
+type CheckBrokerLoadRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *CheckBrokerLoadRequest) Reset() {
+	*x = CheckBrokerLoadRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[8]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CheckBrokerLoadRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CheckBrokerLoadRequest) ProtoMessage() {}
+
+func (x *CheckBrokerLoadRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[8]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CheckBrokerLoadRequest.ProtoReflect.Descriptor instead.
+func (*CheckBrokerLoadRequest) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{8}
+}
+
+type CheckBrokerLoadResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	MessageCount int64 `protobuf:"varint,1,opt,name=message_count,json=messageCount,proto3" json:"message_count,omitempty"`
+	BytesCount   int64 `protobuf:"varint,2,opt,name=bytes_count,json=bytesCount,proto3" json:"bytes_count,omitempty"`
+}
+
+func (x *CheckBrokerLoadResponse) Reset() {
+	*x = CheckBrokerLoadResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mq_proto_msgTypes[9]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CheckBrokerLoadResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CheckBrokerLoadResponse) ProtoMessage() {}
+
+func (x *CheckBrokerLoadResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_mq_proto_msgTypes[9]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CheckBrokerLoadResponse.ProtoReflect.Descriptor instead.
+func (*CheckBrokerLoadResponse) Descriptor() ([]byte, []int) {
+	return file_mq_proto_rawDescGZIP(), []int{9}
+}
+
+func (x *CheckBrokerLoadResponse) GetMessageCount() int64 {
+	if x != nil {
+		return x.MessageCount
+	}
+	return 0
+}
+
+func (x *CheckBrokerLoadResponse) GetBytesCount() int64 {
+	if x != nil {
+		return x.BytesCount
+	}
+	return 0
+}
+
 var File_mq_proto protoreflect.FileDescriptor
 
 var file_mq_proto_rawDesc = []byte{
 	0x0a, 0x08, 0x6d, 0x71, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0c, 0x6d, 0x65, 0x73, 0x73,
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+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -142,19 +628,36 @@ func file_mq_proto_rawDescGZIP() []byte {
 	return file_mq_proto_rawDescData
 }
 
-var file_mq_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_mq_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
 var file_mq_proto_goTypes = []interface{}{
 	(*FindBrokerLeaderRequest)(nil),      // 0: messaging_pb.FindBrokerLeaderRequest
 	(*FindBrokerLeaderResponse)(nil),     // 1: messaging_pb.FindBrokerLeaderResponse
+	(*Partition)(nil),                    // 2: messaging_pb.Partition
+	(*Segment)(nil),                      // 3: messaging_pb.Segment
+	(*AssignSegmentBrokersRequest)(nil),  // 4: messaging_pb.AssignSegmentBrokersRequest
+	(*AssignSegmentBrokersResponse)(nil), // 5: messaging_pb.AssignSegmentBrokersResponse
+	(*CheckSegmentStatusRequest)(nil),    // 6: messaging_pb.CheckSegmentStatusRequest
+	(*CheckSegmentStatusResponse)(nil),   // 7: messaging_pb.CheckSegmentStatusResponse
+	(*CheckBrokerLoadRequest)(nil),       // 8: messaging_pb.CheckBrokerLoadRequest
+	(*CheckBrokerLoadResponse)(nil),      // 9: messaging_pb.CheckBrokerLoadResponse
 }
 var file_mq_proto_depIdxs = []int32{
-	0, // 0: messaging_pb.SeaweedMessaging.FindBrokerLeader:input_type -> messaging_pb.FindBrokerLeaderRequest
-	1, // 1: messaging_pb.SeaweedMessaging.FindBrokerLeader:output_type -> messaging_pb.FindBrokerLeaderResponse
-	1, // [1:2] is the sub-list for method output_type
-	0, // [0:1] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	2, // 0: messaging_pb.Segment.partition:type_name -> messaging_pb.Partition
+	3, // 1: messaging_pb.AssignSegmentBrokersRequest.segment:type_name -> messaging_pb.Segment
+	3, // 2: messaging_pb.CheckSegmentStatusRequest.segment:type_name -> messaging_pb.Segment
+	0, // 3: messaging_pb.SeaweedMessaging.FindBrokerLeader:input_type -> messaging_pb.FindBrokerLeaderRequest
+	4, // 4: messaging_pb.SeaweedMessaging.AssignSegmentBrokers:input_type -> messaging_pb.AssignSegmentBrokersRequest
+	6, // 5: messaging_pb.SeaweedMessaging.CheckSegmentStatus:input_type -> messaging_pb.CheckSegmentStatusRequest
+	8, // 6: messaging_pb.SeaweedMessaging.CheckBrokerLoad:input_type -> messaging_pb.CheckBrokerLoadRequest
+	1, // 7: messaging_pb.SeaweedMessaging.FindBrokerLeader:output_type -> messaging_pb.FindBrokerLeaderResponse
+	5, // 8: messaging_pb.SeaweedMessaging.AssignSegmentBrokers:output_type -> messaging_pb.AssignSegmentBrokersResponse
+	7, // 9: messaging_pb.SeaweedMessaging.CheckSegmentStatus:output_type -> messaging_pb.CheckSegmentStatusResponse
+	9, // 10: messaging_pb.SeaweedMessaging.CheckBrokerLoad:output_type -> messaging_pb.CheckBrokerLoadResponse
+	7, // [7:11] is the sub-list for method output_type
+	3, // [3:7] is the sub-list for method input_type
+	3, // [3:3] is the sub-list for extension type_name
+	3, // [3:3] is the sub-list for extension extendee
+	0, // [0:3] is the sub-list for field type_name
 }
 
 func init() { file_mq_proto_init() }
@@ -187,6 +690,102 @@ func file_mq_proto_init() {
 				return nil
 			}
 		}
+		file_mq_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Partition); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_mq_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Segment); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_mq_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*AssignSegmentBrokersRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_mq_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*AssignSegmentBrokersResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_mq_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CheckSegmentStatusRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_mq_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CheckSegmentStatusResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_mq_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CheckBrokerLoadRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_mq_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CheckBrokerLoadResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -194,7 +793,7 @@ func file_mq_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_mq_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   2,
+			NumMessages:   10,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

weed/pb/mq_pb/mq_grpc.pb.go

@@ -19,6 +19,9 @@ const _ = grpc.SupportPackageIsVersion7
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type SeaweedMessagingClient interface {
 	FindBrokerLeader(ctx context.Context, in *FindBrokerLeaderRequest, opts ...grpc.CallOption) (*FindBrokerLeaderResponse, error)
+	AssignSegmentBrokers(ctx context.Context, in *AssignSegmentBrokersRequest, opts ...grpc.CallOption) (*AssignSegmentBrokersResponse, error)
+	CheckSegmentStatus(ctx context.Context, in *CheckSegmentStatusRequest, opts ...grpc.CallOption) (*CheckSegmentStatusResponse, error)
+	CheckBrokerLoad(ctx context.Context, in *CheckBrokerLoadRequest, opts ...grpc.CallOption) (*CheckBrokerLoadResponse, error)
 }
 
 type seaweedMessagingClient struct {
@@ -38,11 +41,41 @@ func (c *seaweedMessagingClient) FindBrokerLeader(ctx context.Context, in *FindB
 	return out, nil
 }
 
+func (c *seaweedMessagingClient) AssignSegmentBrokers(ctx context.Context, in *AssignSegmentBrokersRequest, opts ...grpc.CallOption) (*AssignSegmentBrokersResponse, error) {
+	out := new(AssignSegmentBrokersResponse)
+	err := c.cc.Invoke(ctx, "/messaging_pb.SeaweedMessaging/AssignSegmentBrokers", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *seaweedMessagingClient) CheckSegmentStatus(ctx context.Context, in *CheckSegmentStatusRequest, opts ...grpc.CallOption) (*CheckSegmentStatusResponse, error) {
+	out := new(CheckSegmentStatusResponse)
+	err := c.cc.Invoke(ctx, "/messaging_pb.SeaweedMessaging/CheckSegmentStatus", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *seaweedMessagingClient) CheckBrokerLoad(ctx context.Context, in *CheckBrokerLoadRequest, opts ...grpc.CallOption) (*CheckBrokerLoadResponse, error) {
+	out := new(CheckBrokerLoadResponse)
+	err := c.cc.Invoke(ctx, "/messaging_pb.SeaweedMessaging/CheckBrokerLoad", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // SeaweedMessagingServer is the server API for SeaweedMessaging service.
 // All implementations must embed UnimplementedSeaweedMessagingServer
 // for forward compatibility
 type SeaweedMessagingServer interface {
 	FindBrokerLeader(context.Context, *FindBrokerLeaderRequest) (*FindBrokerLeaderResponse, error)
+	AssignSegmentBrokers(context.Context, *AssignSegmentBrokersRequest) (*AssignSegmentBrokersResponse, error)
+	CheckSegmentStatus(context.Context, *CheckSegmentStatusRequest) (*CheckSegmentStatusResponse, error)
+	CheckBrokerLoad(context.Context, *CheckBrokerLoadRequest) (*CheckBrokerLoadResponse, error)
 	mustEmbedUnimplementedSeaweedMessagingServer()
 }
 
@@ -53,6 +86,15 @@ type UnimplementedSeaweedMessagingServer struct {
 func (UnimplementedSeaweedMessagingServer) FindBrokerLeader(context.Context, *FindBrokerLeaderRequest) (*FindBrokerLeaderResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method FindBrokerLeader not implemented")
 }
+func (UnimplementedSeaweedMessagingServer) AssignSegmentBrokers(context.Context, *AssignSegmentBrokersRequest) (*AssignSegmentBrokersResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method AssignSegmentBrokers not implemented")
+}
+func (UnimplementedSeaweedMessagingServer) CheckSegmentStatus(context.Context, *CheckSegmentStatusRequest) (*CheckSegmentStatusResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckSegmentStatus not implemented")
+}
+func (UnimplementedSeaweedMessagingServer) CheckBrokerLoad(context.Context, *CheckBrokerLoadRequest) (*CheckBrokerLoadResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckBrokerLoad not implemented")
+}
 func (UnimplementedSeaweedMessagingServer) mustEmbedUnimplementedSeaweedMessagingServer() {}
 
 // UnsafeSeaweedMessagingServer may be embedded to opt out of forward compatibility for this service.
@@ -84,6 +126,60 @@ func _SeaweedMessaging_FindBrokerLeader_Handler(srv interface{}, ctx context.Con
 	return interceptor(ctx, in, info, handler)
 }
 
+func _SeaweedMessaging_AssignSegmentBrokers_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(AssignSegmentBrokersRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedMessagingServer).AssignSegmentBrokers(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/messaging_pb.SeaweedMessaging/AssignSegmentBrokers",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedMessagingServer).AssignSegmentBrokers(ctx, req.(*AssignSegmentBrokersRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _SeaweedMessaging_CheckSegmentStatus_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CheckSegmentStatusRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedMessagingServer).CheckSegmentStatus(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/messaging_pb.SeaweedMessaging/CheckSegmentStatus",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedMessagingServer).CheckSegmentStatus(ctx, req.(*CheckSegmentStatusRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _SeaweedMessaging_CheckBrokerLoad_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CheckBrokerLoadRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedMessagingServer).CheckBrokerLoad(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/messaging_pb.SeaweedMessaging/CheckBrokerLoad",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedMessagingServer).CheckBrokerLoad(ctx, req.(*CheckBrokerLoadRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // SeaweedMessaging_ServiceDesc is the grpc.ServiceDesc for SeaweedMessaging service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -95,6 +191,18 @@ var SeaweedMessaging_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "FindBrokerLeader",
 			Handler:    _SeaweedMessaging_FindBrokerLeader_Handler,
 		},
+		{
+			MethodName: "AssignSegmentBrokers",
+			Handler:    _SeaweedMessaging_AssignSegmentBrokers_Handler,
+		},
+		{
+			MethodName: "CheckSegmentStatus",
+			Handler:    _SeaweedMessaging_CheckSegmentStatus_Handler,
+		},
+		{
+			MethodName: "CheckBrokerLoad",
+			Handler:    _SeaweedMessaging_CheckBrokerLoad_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "mq.proto",

weed/server/master_grpc_server_cluster.go

@@ -11,8 +11,18 @@ import (
 func (ms *MasterServer) ListClusterNodes(ctx context.Context, req *master_pb.ListClusterNodesRequest) (*master_pb.ListClusterNodesResponse, error) {
 	resp := &master_pb.ListClusterNodesResponse{}
 	filerGroup := cluster.FilerGroupName(req.FilerGroup)
-	clusterNodes := ms.Cluster.ListClusterNode(filerGroup, req.ClientType)
 
+	if req.IsLeaderOnly {
+		leaders := ms.Cluster.ListClusterNodeLeaders(filerGroup, req.ClientType)
+		for _, node := range leaders {
+			resp.ClusterNodes = append(resp.ClusterNodes, &master_pb.ListClusterNodesResponse_ClusterNode{
+				Address:  string(node),
+				IsLeader: true,
+			})
+		}
+	} else {
+		clusterNodes := ms.Cluster.ListClusterNode(filerGroup, req.ClientType)
+		clusterNodes = limitTo(clusterNodes, req.Limit)
 		for _, node := range clusterNodes {
 			resp.ClusterNodes = append(resp.ClusterNodes, &master_pb.ListClusterNodesResponse_ClusterNode{
 				Address:     string(node.Address),
@@ -23,6 +33,7 @@ func (ms *MasterServer) ListClusterNodes(ctx context.Context, req *master_pb.Lis
 				Rack:        string(node.Rack),
 			})
 		}
+	}
 	return resp, nil
 }
 
@@ -41,3 +52,21 @@ func (ms *MasterServer) GetOneFiler(filerGroup cluster.FilerGroupName) pb.Server
 	}
 	return "localhost:8888"
 }
+
+func limitTo(nodes []*cluster.ClusterNode, limit int32) (selected []*cluster.ClusterNode) {
+	if limit <= 0 || len(nodes) < int(limit) {
+		return nodes
+	}
+	seletedSet := make(map[pb.ServerAddress]*cluster.ClusterNode)
+	for i := 0; i < int(limit)*3; i++ {
+		x := rand.Intn(len(nodes))
+		if _, found := seletedSet[nodes[x].Address]; found {
+			continue
+		}
+		seletedSet[nodes[x].Address] = nodes[x]
+	}
+	for _, node := range seletedSet {
+		selected = append(selected, node)
+	}
+	return
+}

weed/shell/command_cluster_ps.go

@@ -86,6 +86,9 @@ func (c *commandClusterPs) Do(args []string, commandEnv *CommandEnv, writer io.W
 			if node.Rack != "" {
 				fmt.Fprintf(writer, "    Rack: %v\n", node.Rack)
 			}
+			if node.IsLeader {
+				fmt.Fprintf(writer, "    IsLeader: %v\n", true)
+			}
 		}
 	}