feat: add segment,pipeline, replica and resourcegroup api for WebUI (#37344)

issue: #36621

Signed-off-by: jaime <yun.zhang@zilliz.com>

internal/datacoord/channel_manager.go

@@ -25,6 +25,7 @@ import (
 	"github.com/cockroachdb/errors"
 	"github.com/samber/lo"
 	"go.uber.org/zap"
+	"google.golang.org/protobuf/proto"
 
 	"github.com/milvus-io/milvus/internal/allocator"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
@@ -53,6 +54,8 @@ type ChannelManager interface {
 	GetNodeChannelsByCollectionID(collectionID int64) map[int64][]string
 	GetChannelsByCollectionID(collectionID int64) []RWChannel
 	GetChannelNamesByCollectionID(collectionID int64) []string
+
+	GetChannelWatchInfos() map[int64]map[string]*datapb.ChannelWatchInfo
 }
 
 // An interface sessionManager implments
@@ -739,6 +742,22 @@ func (m *ChannelManagerImpl) fillChannelWatchInfo(op *ChannelOp) error {
 	return nil
 }
 
+func (m *ChannelManagerImpl) GetChannelWatchInfos() map[int64]map[string]*datapb.ChannelWatchInfo {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+	infos := make(map[int64]map[string]*datapb.ChannelWatchInfo)
+	for _, nc := range m.store.GetNodesChannels() {
+		for _, ch := range nc.Channels {
+			watchInfo := proto.Clone(ch.GetWatchInfo()).(*datapb.ChannelWatchInfo)
+			if _, ok := infos[nc.NodeID]; !ok {
+				infos[nc.NodeID] = make(map[string]*datapb.ChannelWatchInfo)
+			}
+			infos[nc.NodeID][watchInfo.Vchan.ChannelName] = watchInfo
+		}
+	}
+	return infos
+}
+
 func inferStateByOpType(opType ChannelOpType) datapb.ChannelWatchState {
 	switch opType {
 	case Watch:

internal/datacoord/channel_manager_test.go

@@ -805,3 +805,51 @@ func (s *ChannelManagerSuite) TestStartupRootCoordFailed() {
 
 func (s *ChannelManagerSuite) TestCheckLoop() {}
 func (s *ChannelManagerSuite) TestGet()       {}
+
+func (s *ChannelManagerSuite) TestGetChannelWatchInfos() {
+	store := NewMockRWChannelStore(s.T())
+	store.EXPECT().GetNodesChannels().Return([]*NodeChannelInfo{
+		{
+			NodeID: 1,
+			Channels: map[string]RWChannel{
+				"ch1": &channelMeta{
+					WatchInfo: &datapb.ChannelWatchInfo{
+						Vchan: &datapb.VchannelInfo{
+							ChannelName: "ch1",
+						},
+						StartTs: 100,
+						State:   datapb.ChannelWatchState_ToWatch,
+						OpID:    1,
+					},
+				},
+			},
+		},
+		{
+			NodeID: 2,
+			Channels: map[string]RWChannel{
+				"ch2": &channelMeta{
+					WatchInfo: &datapb.ChannelWatchInfo{
+						Vchan: &datapb.VchannelInfo{
+							ChannelName: "ch2",
+						},
+						StartTs: 10,
+						State:   datapb.ChannelWatchState_WatchSuccess,
+						OpID:    1,
+					},
+				},
+			},
+		},
+	})
+
+	cm := &ChannelManagerImpl{store: store}
+	infos := cm.GetChannelWatchInfos()
+	s.Equal(2, len(infos))
+	s.Equal("ch1", infos[1]["ch1"].GetVchan().ChannelName)
+	s.Equal("ch2", infos[2]["ch2"].GetVchan().ChannelName)
+
+	// test empty value
+	store.EXPECT().GetNodesChannels().Unset()
+	store.EXPECT().GetNodesChannels().Return([]*NodeChannelInfo{})
+	infos = cm.GetChannelWatchInfos()
+	s.Equal(0, len(infos))
+}

internal/datacoord/index_meta.go

@@ -25,11 +25,11 @@ import (
 	"sync"
 	"time"
 
-	"github.com/golang/protobuf/proto"
 	"github.com/hashicorp/golang-lru/v2/expirable"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/samber/lo"
 	"go.uber.org/zap"
+	"google.golang.org/protobuf/proto"
 
 	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"

internal/datacoord/meta.go

@@ -2025,3 +2025,28 @@ func (m *meta) SaveStatsResultSegment(oldSegmentID int64, result *workerpb.Stats
 
 	return metricMutation, nil
 }
+
+func (m *meta) getSegmentsMetrics() []*metricsinfo.Segment {
+	m.RLock()
+	defer m.RUnlock()
+
+	segments := make([]*metricsinfo.Segment, 0, len(m.segments.segments))
+	for _, s := range m.segments.segments {
+		segments = append(segments, &metricsinfo.Segment{
+			SegmentID:    s.ID,
+			CollectionID: s.CollectionID,
+			PartitionID:  s.PartitionID,
+			Channel:      s.InsertChannel,
+			NumOfRows:    s.NumOfRows,
+			State:        s.State.String(),
+			MemSize:      s.size.Load(),
+			Level:        s.Level.String(),
+			IsImporting:  s.IsImporting,
+			Compacted:    s.Compacted,
+			IsSorted:     s.IsSorted,
+			NodeID:       paramtable.GetNodeID(),
+		})
+	}
+
+	return segments
+}

internal/datacoord/meta_test.go

@@ -26,6 +26,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/suite"
+	"golang.org/x/exp/slices"
 	"google.golang.org/protobuf/proto"
 
 	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
@@ -43,6 +44,7 @@ import (
 	"github.com/milvus-io/milvus/pkg/metrics"
 	"github.com/milvus-io/milvus/pkg/util"
 	"github.com/milvus-io/milvus/pkg/util/merr"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/testutils"
 )
@@ -1319,3 +1321,62 @@ func Test_meta_ReloadCollectionsFromRootcoords(t *testing.T) {
 		assert.NotNil(t, c)
 	})
 }
+
+func TestMeta_GetSegmentsJSON(t *testing.T) {
+	// Create a mock meta object
+	m := &meta{
+		segments: &SegmentsInfo{
+			segments: map[int64]*SegmentInfo{
+				1: {
+					SegmentInfo: &datapb.SegmentInfo{
+						ID:            1,
+						CollectionID:  1,
+						PartitionID:   1,
+						InsertChannel: "channel1",
+						NumOfRows:     100,
+						State:         commonpb.SegmentState_Growing,
+						MaxRowNum:     1000,
+						Compacted:     false,
+					},
+				},
+				2: {
+					SegmentInfo: &datapb.SegmentInfo{
+						ID:            2,
+						CollectionID:  2,
+						PartitionID:   2,
+						InsertChannel: "channel2",
+						NumOfRows:     200,
+						State:         commonpb.SegmentState_Sealed,
+						MaxRowNum:     2000,
+						Compacted:     true,
+					},
+				},
+			},
+		},
+	}
+
+	segments := m.getSegmentsMetrics()
+
+	// Check the length of the segments
+	assert.Equal(t, 2, len(segments))
+
+	slices.SortFunc(segments, func(i, j *metricsinfo.Segment) int { return int(i.SegmentID - j.SegmentID) })
+
+	// Check the first segment
+	assert.Equal(t, int64(1), segments[0].SegmentID)
+	assert.Equal(t, int64(1), segments[0].CollectionID)
+	assert.Equal(t, int64(1), segments[0].PartitionID)
+	assert.Equal(t, "channel1", segments[0].Channel)
+	assert.Equal(t, int64(100), segments[0].NumOfRows)
+	assert.Equal(t, "Growing", segments[0].State)
+	assert.False(t, segments[0].Compacted)
+
+	// Check the second segment
+	assert.Equal(t, int64(2), segments[1].SegmentID)
+	assert.Equal(t, int64(2), segments[1].CollectionID)
+	assert.Equal(t, int64(2), segments[1].PartitionID)
+	assert.Equal(t, "channel2", segments[1].Channel)
+	assert.Equal(t, int64(200), segments[1].NumOfRows)
+	assert.Equal(t, "Sealed", segments[1].State)
+	assert.True(t, segments[1].Compacted)
+}

internal/datacoord/metrics_info.go

@@ -19,6 +19,7 @@ package datacoord
 import (
 	"context"
 	"encoding/json"
+	"sync"
 
 	"github.com/cockroachdb/errors"
 	"go.uber.org/zap"
@@ -27,8 +28,10 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
 	"github.com/milvus-io/milvus/internal/datacoord/session"
+	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/indexpb"
 	"github.com/milvus-io/milvus/internal/types"
+	"github.com/milvus-io/milvus/internal/util/metrics"
 	"github.com/milvus-io/milvus/pkg/log"
 	"github.com/milvus-io/milvus/pkg/util/hardware"
 	"github.com/milvus-io/milvus/pkg/util/merr"
@@ -82,74 +85,90 @@ func (s *Server) getCollectionMetrics(ctx context.Context) *metricsinfo.DataCoor
 	return ret
 }
 
-// GetSyncTaskMetrics retrieves and aggregates the sync task metrics of the datanode.
+func (s *Server) getChannelsJSON(ctx context.Context, req *milvuspb.GetMetricsRequest) (string, error) {
-func (s *Server) GetSyncTaskMetrics(
+	channels, err := getMetrics[*metricsinfo.Channel](s, ctx, req)
-	ctx context.Context,
+	// fill checkpoint timestamp
-	req *milvuspb.GetMetricsRequest,
+	channel2Checkpoints := s.meta.GetChannelCheckpoints()
-) (string, error) {
+	for _, channel := range channels {
-	resp, err := s.requestDataNodeGetMetrics(ctx, req)
+		if cp, ok := channel2Checkpoints[channel.Name]; ok {
-	if err != nil {
+			channel.CheckpointTS = typeutil.TimestampToString(cp.GetTimestamp())
-		return "", err
+		} else {
+			log.Warn("channel not found in meta cache", zap.String("channel", channel.Name))
 		}
-
-	tasks := make(map[string][]*metricsinfo.SyncTask, resp.Len())
-	resp.Range(func(key string, value *milvuspb.GetMetricsResponse) bool {
-		if value.Response != "" {
-			var sts []*metricsinfo.SyncTask
-			if err1 := json.Unmarshal([]byte(value.Response), &sts); err1 != nil {
-				log.Warn("failed to unmarshal sync task metrics")
-				err = err1
-				return false
 	}
-			tasks[key] = sts
+	return metricsinfo.MarshalGetMetricsValues(channels, err)
-		}
-		return true
-	})
-
-	if err != nil {
-		return "", err
-	}
-
-	if len(tasks) == 0 {
-		return "", nil
-	}
-
-	bs, err := json.Marshal(tasks)
-	if err != nil {
-		return "", err
-	}
-	return (string)(bs), nil
 }
 
-func (s *Server) requestDataNodeGetMetrics(
+// mergeChannels merges the channel metrics from data nodes and channel watch infos from channel manager
-	ctx context.Context,
+// dnChannels: a slice of Channel metrics from data nodes
-	req *milvuspb.GetMetricsRequest,
+// dcChannels: a map of channel watch infos from the channel manager, keyed by node ID and channel name
-) (*typeutil.ConcurrentMap[string, *milvuspb.GetMetricsResponse], error) {
+func mergeChannels(dnChannels []*metricsinfo.Channel, dcChannels map[int64]map[string]*datapb.ChannelWatchInfo) []*metricsinfo.Channel {
-	nodes := s.cluster.GetSessions()
+	mergedChannels := make([]*metricsinfo.Channel, 0)
 
-	rets := typeutil.NewConcurrentMap[string, *milvuspb.GetMetricsResponse]()
+	// Add or update channels from data nodes
-	wg, ctx := errgroup.WithContext(ctx)
+	for _, dnChannel := range dnChannels {
-	for _, node := range nodes {
+		if dcChannelMap, ok := dcChannels[dnChannel.NodeID]; ok {
-		wg.Go(func() error {
+			if dcChannel, ok := dcChannelMap[dnChannel.Name]; ok {
-			cli, err := node.GetOrCreateClient(ctx)
+				dnChannel.WatchState = dcChannel.State.String()
-			if err != nil {
+				delete(dcChannelMap, dnChannel.Name)
-				return err
 			}
-			ret, err := cli.GetMetrics(ctx, req)
-			if err != nil {
-				return err
 		}
-			key := metricsinfo.ConstructComponentName(typeutil.DataNodeRole, node.NodeID())
+		mergedChannels = append(mergedChannels, dnChannel)
-			rets.Insert(key, ret)
+	}
-			return nil
+
+	// Add remaining channels from channel manager
+	for nodeID, dcChannelMap := range dcChannels {
+		for _, dcChannel := range dcChannelMap {
+			mergedChannels = append(mergedChannels, &metricsinfo.Channel{
+				Name:         dcChannel.Vchan.ChannelName,
+				CollectionID: dcChannel.Vchan.CollectionID,
+				WatchState:   dcChannel.State.String(),
+				NodeID:       nodeID,
 			})
 		}
-
-	err := wg.Wait()
-	if err != nil {
-		return nil, err
 	}
-	return rets, nil
+
+	return mergedChannels
+}
+
+func (s *Server) getDistJSON(ctx context.Context, req *milvuspb.GetMetricsRequest) string {
+	segments := s.meta.getSegmentsMetrics()
+	var channels []*metricsinfo.DmChannel
+	for nodeID, ch := range s.channelManager.GetChannelWatchInfos() {
+		for _, chInfo := range ch {
+			dmChannel := metrics.NewDMChannelFrom(chInfo.GetVchan())
+			dmChannel.NodeID = nodeID
+			dmChannel.WatchState = chInfo.State.String()
+			dmChannel.StartWatchTS = chInfo.GetStartTs()
+			channels = append(channels, dmChannel)
+		}
+	}
+
+	if len(segments) == 0 && len(channels) == 0 {
+		return ""
+	}
+
+	dist := &metricsinfo.DataCoordDist{
+		Segments:   segments,
+		DMChannels: channels,
+	}
+
+	bs, err := json.Marshal(dist)
+	if err != nil {
+		log.Warn("marshal dist value failed", zap.String("err", err.Error()))
+		return ""
+	}
+	return string(bs)
+}
+
+func (s *Server) getSegmentsJSON(ctx context.Context, req *milvuspb.GetMetricsRequest) (string, error) {
+	ret, err := getMetrics[*metricsinfo.Segment](s, ctx, req)
+	return metricsinfo.MarshalGetMetricsValues(ret, err)
+}
+
+func (s *Server) getSyncTaskJSON(ctx context.Context, req *milvuspb.GetMetricsRequest) (string, error) {
+	ret, err := getMetrics[*metricsinfo.SyncTask](s, ctx, req)
+	return metricsinfo.MarshalGetMetricsValues(ret, err)
 }
 
 // getSystemInfoMetrics composes data cluster metrics
@@ -322,3 +341,44 @@ func (s *Server) getIndexNodeMetrics(ctx context.Context, req *milvuspb.GetMetri
 	infos.BaseComponentInfos.HasError = false
 	return infos, nil
 }
+
+// getMetrics retrieves and aggregates the metrics of the datanode to a slice
+func getMetrics[T any](s *Server, ctx context.Context, req *milvuspb.GetMetricsRequest) ([]T, error) {
+	var metrics []T
+	var mu sync.Mutex
+	errorGroup, ctx := errgroup.WithContext(ctx)
+
+	nodes := s.cluster.GetSessions()
+	for _, node := range nodes {
+		errorGroup.Go(func() error {
+			cli, err := node.GetOrCreateClient(ctx)
+			if err != nil {
+				return err
+			}
+			resp, err := cli.GetMetrics(ctx, req)
+			if err != nil {
+				log.Warn("failed to get metric from DataNode", zap.Int64("nodeID", node.NodeID()))
+				return err
+			}
+
+			if resp.Response == "" {
+				return nil
+			}
+
+			var infos []T
+			err = json.Unmarshal([]byte(resp.Response), &infos)
+			if err != nil {
+				log.Warn("invalid metrics of data node was found", zap.Error(err))
+				return err
+			}
+
+			mu.Lock()
+			metrics = append(metrics, infos...)
+			mu.Unlock()
+			return nil
+		})
+	}
+
+	err := errorGroup.Wait()
+	return metrics, err
+}

internal/datacoord/metrics_info_test.go

@@ -18,17 +18,22 @@ package datacoord
 
 import (
 	"context"
+	"encoding/json"
 	"testing"
 
 	"github.com/cockroachdb/errors"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/grpc"
 
+	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
+	"github.com/milvus-io/milvus-proto/go-api/v2/msgpb"
 	"github.com/milvus-io/milvus/internal/datacoord/session"
+	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/types"
 	"github.com/milvus-io/milvus/pkg/util/merr"
 	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
+	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -206,10 +211,25 @@ func TestGetSyncTaskMetrics(t *testing.T) {
 		req := &milvuspb.GetMetricsRequest{}
 		ctx := context.Background()
 
-		task := `[{"segment_id": 1, "batch_rows": 100, "segment_level": "L0", "ts_from": 1000, "ts_to": 2000,"delta_row_count": 10, "flush_size": 1024, "running_time": 2000000000}]`
+		tasks := []metricsinfo.SyncTask{
+			{
+				SegmentID:     1,
+				BatchRows:     100,
+				SegmentLevel:  "L0",
+				TSFrom:        1000,
+				TSTo:          2000,
+				DeltaRowCount: 10,
+				FlushSize:     1024,
+				RunningTime:   "2h",
+			},
+		}
+		tasksBytes, err := json.Marshal(tasks)
+		assert.NoError(t, err)
+		expectedJSON := string(tasksBytes)
+
 		mockResp := &milvuspb.GetMetricsResponse{
 			Status:   merr.Success(),
-			Response: task,
+			Response: expectedJSON,
 		}
 
 		mockClient := &mockMetricDataNodeClient{
@@ -226,9 +246,8 @@ func TestGetSyncTaskMetrics(t *testing.T) {
 		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
 		svr.cluster = mockCluster
 
-		actualJSON, err := svr.GetSyncTaskMetrics(ctx, req)
+		actualJSON, err := svr.getSyncTaskJSON(ctx, req)
 		assert.NoError(t, err)
-		expectedJSON := `{"datanode1":[{"segment_id":1,"batch_rows":100,"segment_level":"L0","ts_from":1000,"ts_to":2000,"delta_row_count":10,"flush_size":1024,"running_time":2000000000}]}`
 		assert.Equal(t, expectedJSON, actualJSON)
 	})
 
@@ -250,7 +269,7 @@ func TestGetSyncTaskMetrics(t *testing.T) {
 		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
 		svr.cluster = mockCluster
 
-		actualJSON, err := svr.GetSyncTaskMetrics(ctx, req)
+		actualJSON, err := svr.getSyncTaskJSON(ctx, req)
 		assert.Error(t, err)
 		assert.Equal(t, "", actualJSON)
 	})
@@ -278,7 +297,7 @@ func TestGetSyncTaskMetrics(t *testing.T) {
 		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
 		svr.cluster = mockCluster
 
-		actualJSON, err := svr.GetSyncTaskMetrics(ctx, req)
+		actualJSON, err := svr.getSyncTaskJSON(ctx, req)
 		assert.Error(t, err)
 		assert.Equal(t, "", actualJSON)
 	})
@@ -307,8 +326,360 @@ func TestGetSyncTaskMetrics(t *testing.T) {
 		svr.cluster = mockCluster
 
 		expectedJSON := ""
-		actualJSON, err := svr.GetSyncTaskMetrics(ctx, req)
+		actualJSON, err := svr.getSyncTaskJSON(ctx, req)
 		assert.NoError(t, err)
 		assert.Equal(t, expectedJSON, actualJSON)
 	})
 }
+
+func TestGetSegmentsJSON(t *testing.T) {
+	svr := Server{}
+	t.Run("ReturnsCorrectJSON", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		segments := []*metricsinfo.Segment{
+			{
+				SegmentID:    1,
+				CollectionID: 100,
+				PartitionID:  10,
+				NumOfRows:    1000,
+				State:        "Flushed",
+			},
+		}
+		segmentsBytes, err := json.Marshal(segments)
+		assert.NoError(t, err)
+		expectedJSON := string(segmentsBytes)
+
+		mockResp := &milvuspb.GetMetricsResponse{
+			Status:   merr.Success(),
+			Response: expectedJSON,
+		}
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return mockResp, nil
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+
+		actualJSON, err := svr.getSegmentsJSON(ctx, req)
+		assert.NoError(t, err)
+		assert.Equal(t, expectedJSON, actualJSON)
+	})
+
+	t.Run("ReturnsErrorOnRequestFailure", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return nil, errors.New("request failed")
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+
+		actualJSON, err := svr.getSegmentsJSON(ctx, req)
+		assert.Error(t, err)
+		assert.Equal(t, "", actualJSON)
+	})
+
+	t.Run("ReturnsErrorOnUnmarshalFailure", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		mockResp := &milvuspb.GetMetricsResponse{
+			Status:   merr.Success(),
+			Response: `invalid json`,
+		}
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return mockResp, nil
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+
+		actualJSON, err := svr.getSegmentsJSON(ctx, req)
+		assert.Error(t, err)
+		assert.Equal(t, "", actualJSON)
+	})
+
+	t.Run("ReturnsEmptyJSONWhenNoSegments", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		mockResp := &milvuspb.GetMetricsResponse{
+			Status:   merr.Success(),
+			Response: "",
+		}
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return mockResp, nil
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+
+		expectedJSON := ""
+		actualJSON, err := svr.getSegmentsJSON(ctx, req)
+		assert.NoError(t, err)
+		assert.Equal(t, expectedJSON, actualJSON)
+	})
+}
+
+func TestGetChannelsJSON(t *testing.T) {
+	svr := Server{}
+	t.Run("ReturnsCorrectJSON", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+
+		channels := []*metricsinfo.Channel{
+			{
+				Name:         "channel1",
+				CollectionID: 100,
+				NodeID:       1,
+			},
+		}
+		channelsBytes, err := json.Marshal(channels)
+		assert.NoError(t, err)
+		channelJSON := string(channelsBytes)
+
+		mockResp := &milvuspb.GetMetricsResponse{
+			Status:   merr.Success(),
+			Response: channelJSON,
+		}
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return mockResp, nil
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+
+		svr.meta = &meta{channelCPs: newChannelCps()}
+		svr.meta.channelCPs.checkpoints["channel1"] = &msgpb.MsgPosition{Timestamp: 1000}
+
+		actualJSON, err := svr.getChannelsJSON(context.TODO(), req)
+		assert.NoError(t, err)
+
+		channels = []*metricsinfo.Channel{
+			{
+				Name:         "channel1",
+				CollectionID: 100,
+				NodeID:       1,
+				CheckpointTS: typeutil.TimestampToString(1000),
+			},
+		}
+		channelsBytes, err = json.Marshal(channels)
+		assert.NoError(t, err)
+		expectedJSON := string(channelsBytes)
+
+		assert.Equal(t, expectedJSON, actualJSON)
+	})
+
+	t.Run("ReturnsErrorOnRequestFailure", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return nil, errors.New("request failed")
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+
+		svr.meta = &meta{channelCPs: newChannelCps()}
+
+		actualJSON, err := svr.getChannelsJSON(ctx, req)
+		assert.Error(t, err)
+		assert.Equal(t, "", actualJSON)
+	})
+
+	t.Run("ReturnsErrorOnUnmarshalFailure", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		mockResp := &milvuspb.GetMetricsResponse{
+			Status:   merr.Success(),
+			Response: `invalid json`,
+		}
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return mockResp, nil
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+
+		svr.meta = &meta{channelCPs: newChannelCps()}
+
+		actualJSON, err := svr.getChannelsJSON(ctx, req)
+		assert.Error(t, err)
+		assert.Equal(t, "", actualJSON)
+	})
+
+	t.Run("ReturnsEmptyJSONWhenNoChannels", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		mockResp := &milvuspb.GetMetricsResponse{
+			Status:   merr.Success(),
+			Response: "",
+		}
+
+		mockClient := &mockMetricDataNodeClient{
+			mock: func() (*milvuspb.GetMetricsResponse, error) {
+				return mockResp, nil
+			},
+		}
+
+		dataNodeCreator := func(ctx context.Context, addr string, nodeID int64) (types.DataNodeClient, error) {
+			return mockClient, nil
+		}
+
+		mockCluster := NewMockCluster(t)
+		mockCluster.EXPECT().GetSessions().Return([]*session.Session{session.NewSession(&session.NodeInfo{NodeID: 1}, dataNodeCreator)})
+		svr.cluster = mockCluster
+		svr.meta = &meta{channelCPs: newChannelCps()}
+
+		expectedJSON := ""
+		actualJSON, err := svr.getChannelsJSON(ctx, req)
+		assert.NoError(t, err)
+		assert.Equal(t, expectedJSON, actualJSON)
+	})
+}
+
+func TestGetDistJSON(t *testing.T) {
+	svr := Server{}
+	nodeID := paramtable.GetNodeID()
+	paramtable.SetNodeID(1)
+	defer paramtable.SetNodeID(nodeID)
+
+	t.Run("ReturnsCorrectJSON", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		svr.meta = &meta{
+			segments: &SegmentsInfo{
+				segments: map[int64]*SegmentInfo{
+					1: {
+						SegmentInfo: &datapb.SegmentInfo{
+							ID:            1,
+							CollectionID:  1,
+							PartitionID:   1,
+							InsertChannel: "channel1",
+							Level:         datapb.SegmentLevel_L1,
+							State:         commonpb.SegmentState_Flushed,
+						},
+					},
+				},
+			},
+		}
+
+		cm := NewMockChannelManager(t)
+		cm.EXPECT().GetChannelWatchInfos().Return(map[int64]map[string]*datapb.ChannelWatchInfo{
+			1: {
+				"channel1": {
+					State: datapb.ChannelWatchState_ToWatch,
+					Vchan: &datapb.VchannelInfo{
+						ChannelName: "channel1",
+					},
+				},
+			},
+		})
+
+		svr.channelManager = cm
+
+		segments := []*metricsinfo.Segment{
+			{
+				SegmentID:    1,
+				State:        commonpb.SegmentState_Flushed.String(),
+				CollectionID: 1,
+				PartitionID:  1,
+				Channel:      "channel1",
+				Level:        datapb.SegmentLevel_L1.String(),
+				NodeID:       1,
+			},
+		}
+		channels := []*metricsinfo.DmChannel{
+			{
+				ChannelName: "channel1",
+				NodeID:      1,
+				WatchState:  datapb.ChannelWatchState_ToWatch.String(),
+			},
+		}
+		dist := &metricsinfo.DataCoordDist{
+			Segments:   segments,
+			DMChannels: channels,
+		}
+		distBytes, err := json.Marshal(dist)
+		assert.NoError(t, err)
+		expectedJSON := string(distBytes)
+
+		actualJSON := svr.getDistJSON(ctx, req)
+		assert.Equal(t, expectedJSON, actualJSON)
+	})
+
+	t.Run("ReturnsEmptyJSONWhenNoDist", func(t *testing.T) {
+		req := &milvuspb.GetMetricsRequest{}
+		ctx := context.Background()
+
+		svr.meta = &meta{segments: &SegmentsInfo{segments: map[int64]*SegmentInfo{}}}
+		cm := NewMockChannelManager(t)
+		cm.EXPECT().GetChannelWatchInfos().Return(map[int64]map[string]*datapb.ChannelWatchInfo{})
+
+		svr.channelManager = cm
+		expectedJSON := ""
+		actualJSON := svr.getDistJSON(ctx, req)
+		assert.Equal(t, expectedJSON, actualJSON)
+	})
+}

internal/datacoord/mock_channelmanager.go

@@ -5,6 +5,7 @@ package datacoord
 import (
 	context "context"
 
+	datapb "github.com/milvus-io/milvus/internal/proto/datapb"
 	mock "github.com/stretchr/testify/mock"
 )
 
@@ -308,6 +309,53 @@ func (_c *MockChannelManager_GetChannelNamesByCollectionID_Call) RunAndReturn(ru
 	return _c
 }
 
+// GetChannelWatchInfos provides a mock function with given fields:
+func (_m *MockChannelManager) GetChannelWatchInfos() map[int64]map[string]*datapb.ChannelWatchInfo {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for GetChannelWatchInfos")
+	}
+
+	var r0 map[int64]map[string]*datapb.ChannelWatchInfo
+	if rf, ok := ret.Get(0).(func() map[int64]map[string]*datapb.ChannelWatchInfo); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(map[int64]map[string]*datapb.ChannelWatchInfo)
+		}
+	}
+
+	return r0
+}
+
+// MockChannelManager_GetChannelWatchInfos_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetChannelWatchInfos'
+type MockChannelManager_GetChannelWatchInfos_Call struct {
+	*mock.Call
+}
+
+// GetChannelWatchInfos is a helper method to define mock.On call
+func (_e *MockChannelManager_Expecter) GetChannelWatchInfos() *MockChannelManager_GetChannelWatchInfos_Call {
+	return &MockChannelManager_GetChannelWatchInfos_Call{Call: _e.mock.On("GetChannelWatchInfos")}
+}
+
+func (_c *MockChannelManager_GetChannelWatchInfos_Call) Run(run func()) *MockChannelManager_GetChannelWatchInfos_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockChannelManager_GetChannelWatchInfos_Call) Return(_a0 map[int64]map[string]*datapb.ChannelWatchInfo) *MockChannelManager_GetChannelWatchInfos_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+func (_c *MockChannelManager_GetChannelWatchInfos_Call) RunAndReturn(run func() map[int64]map[string]*datapb.ChannelWatchInfo) *MockChannelManager_GetChannelWatchInfos_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
 // GetChannelsByCollectionID provides a mock function with given fields: collectionID
 func (_m *MockChannelManager) GetChannelsByCollectionID(collectionID int64) []RWChannel {
 	ret := _m.Called(collectionID)

internal/datacoord/server.go

@@ -1141,6 +1141,11 @@ func (s *Server) registerMetricsRequest() {
 			return s.getSystemInfoMetrics(ctx, req)
 		})
 
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.DataDist,
+		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+			return s.getDistJSON(ctx, req), nil
+		})
+
 	s.metricsRequest.RegisterMetricsRequest(metricsinfo.ImportTasks,
 		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
 			return s.importMeta.TaskStatsJSON(), nil
@@ -1158,8 +1163,19 @@ func (s *Server) registerMetricsRequest() {
 
 	s.metricsRequest.RegisterMetricsRequest(metricsinfo.SyncTasks,
 		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
-			return s.GetSyncTaskMetrics(ctx, req)
+			return s.getSyncTaskJSON(ctx, req)
 		})
+
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.DataSegments,
+		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+			return s.getSegmentsJSON(ctx, req)
+		})
+
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.DataChannels,
+		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+			return s.getChannelsJSON(ctx, req)
+		})
+
 	log.Info("register metrics actions finished")
 }
 

internal/datacoord/stats_task_meta.go

@@ -22,8 +22,8 @@ import (
 	"strconv"
 	"sync"
 
-	"github.com/golang/protobuf/proto"
 	"go.uber.org/zap"
+	"google.golang.org/protobuf/proto"
 
 	"github.com/milvus-io/milvus/internal/metastore"
 	"github.com/milvus-io/milvus/internal/proto/indexpb"

internal/datanode/data_node.go

@@ -284,10 +284,21 @@ func (node *DataNode) registerMetricsRequest() {
 		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
 			return node.getSystemInfoMetrics(ctx, req)
 		})
+
 	node.metricsRequest.RegisterMetricsRequest(metricsinfo.SyncTasks,
 		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
 			return node.syncMgr.TaskStatsJSON(), nil
 		})
+
+	node.metricsRequest.RegisterMetricsRequest(metricsinfo.DataSegments,
+		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+			return node.flowgraphManager.GetSegmentsJSON(), nil
+		})
+
+	node.metricsRequest.RegisterMetricsRequest(metricsinfo.DataChannels,
+		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+			return node.flowgraphManager.GetChannelsJSON(), nil
+		})
 	log.Info("register metrics actions finished")
 }
 

internal/flushcommon/metacache/segment.go

@@ -87,6 +87,14 @@ func (s *SegmentInfo) Level() datapb.SegmentLevel {
 	return s.level
 }
 
+func (s *SegmentInfo) BufferRows() int64 {
+	return s.bufferRows
+}
+
+func (s *SegmentInfo) SyncingRows() int64 {
+	return s.syncingRows
+}
+
 func (s *SegmentInfo) Clone() *SegmentInfo {
 	return &SegmentInfo{
 		segmentID:        s.segmentID,

internal/flushcommon/pipeline/flow_graph_manager.go

@@ -18,6 +18,7 @@ package pipeline
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 
 	"go.uber.org/zap"
@@ -25,6 +26,7 @@ import (
 	"github.com/milvus-io/milvus/internal/flushcommon/util"
 	"github.com/milvus-io/milvus/pkg/log"
 	"github.com/milvus-io/milvus/pkg/metrics"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
@@ -40,6 +42,8 @@ type FlowgraphManager interface {
 	GetFlowgraphCount() int
 	GetCollectionIDs() []int64
 
+	GetChannelsJSON() string
+	GetSegmentsJSON() string
 	Close()
 }
 
@@ -115,6 +119,59 @@ func (fm *fgManagerImpl) GetCollectionIDs() []int64 {
 	return collectionSet.Collect()
 }
 
+// GetChannelsJSON  returns all channels in json format.
+func (fm *fgManagerImpl) GetChannelsJSON() string {
+	var channels []*metricsinfo.Channel
+	fm.flowgraphs.Range(func(ch string, ds *DataSyncService) bool {
+		latestTimeTick := ds.timetickSender.GetLatestTimestamp(ch)
+		channels = append(channels, &metricsinfo.Channel{
+			Name:           ch,
+			WatchState:     ds.fg.Status(),
+			LatestTimeTick: typeutil.TimestampToString(latestTimeTick),
+			NodeID:         paramtable.GetNodeID(),
+			CollectionID:   ds.metacache.Collection(),
+		})
+		return true
+	})
+
+	ret, err := json.Marshal(channels)
+	if err != nil {
+		log.Warn("failed to marshal channels", zap.Error(err))
+		return ""
+	}
+	return string(ret)
+}
+
+func (fm *fgManagerImpl) GetSegmentsJSON() string {
+	var segments []*metricsinfo.Segment
+	fm.flowgraphs.Range(func(ch string, ds *DataSyncService) bool {
+		meta := ds.metacache
+		for _, segment := range meta.GetSegmentsBy() {
+			segments = append(segments, &metricsinfo.Segment{
+				SegmentID:      segment.SegmentID(),
+				CollectionID:   meta.Collection(),
+				PartitionID:    segment.PartitionID(),
+				Channel:        ch,
+				State:          segment.State().String(),
+				Level:          segment.Level().String(),
+				NodeID:         paramtable.GetNodeID(),
+				NumOfRows:      segment.NumOfRows(),
+				FlushedRows:    segment.FlushedRows(),
+				SyncBufferRows: segment.BufferRows(),
+				SyncingRows:    segment.SyncingRows(),
+			})
+		}
+		return true
+	})
+
+	ret, err := json.Marshal(segments)
+	if err != nil {
+		log.Warn("failed to marshal segments", zap.Error(err))
+		return ""
+	}
+	return string(ret)
+}
+
 func (fm *fgManagerImpl) Close() {
 	fm.cancelFunc()
 }

internal/flushcommon/pipeline/flow_graph_manager_test.go

@@ -18,8 +18,8 @@ package pipeline
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
-	"math/rand"
 	"os"
 	"testing"
 
@@ -30,15 +30,20 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
 	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/flushcommon/broker"
+	"github.com/milvus-io/milvus/internal/flushcommon/metacache"
+	"github.com/milvus-io/milvus/internal/flushcommon/metacache/pkoracle"
 	"github.com/milvus-io/milvus/internal/flushcommon/syncmgr"
 	"github.com/milvus-io/milvus/internal/flushcommon/util"
 	"github.com/milvus-io/milvus/internal/flushcommon/writebuffer"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
+	"github.com/milvus-io/milvus/internal/util/metrics"
 	"github.com/milvus-io/milvus/internal/util/sessionutil"
 	"github.com/milvus-io/milvus/pkg/common"
 	"github.com/milvus-io/milvus/pkg/mq/msgdispatcher"
 	"github.com/milvus-io/milvus/pkg/mq/msgstream"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
+	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
 func TestMain(t *testing.M) {
@@ -98,7 +103,7 @@ func TestFlowGraphManager(t *testing.T) {
 }
 
 func generateChannelWatchInfo() *datapb.ChannelWatchInfo {
-	collectionID := int64(rand.Uint32())
+	collectionID := int64(1)
 	dmChannelName := fmt.Sprintf("%s_%d", "fake-ch-", collectionID)
 	schema := &schemapb.CollectionSchema{
 		Name: fmt.Sprintf("%s_%d", "collection_", collectionID),
@@ -124,3 +129,105 @@ func generateChannelWatchInfo() *datapb.ChannelWatchInfo {
 		Schema: schema,
 	}
 }
+
+type mockTimeSender struct{}
+
+func (m *mockTimeSender) Update(channel string, ts typeutil.Timestamp, stats []*commonpb.SegmentStats) {
+	panic("implement me")
+}
+
+func (m *mockTimeSender) GetLatestTimestamp(channel string) typeutil.Timestamp {
+	return 0
+}
+
+func newFlowGraphManager(t *testing.T) (string, FlowgraphManager) {
+	mockBroker := broker.NewMockBroker(t)
+	mockBroker.EXPECT().ReportTimeTick(mock.Anything, mock.Anything).Return(nil).Maybe()
+	mockBroker.EXPECT().SaveBinlogPaths(mock.Anything, mock.Anything).Return(nil).Maybe()
+	mockBroker.EXPECT().GetSegmentInfo(mock.Anything, mock.Anything).Return([]*datapb.SegmentInfo{}, nil).Maybe()
+
+	wbm := writebuffer.NewMockBufferManager(t)
+	wbm.EXPECT().Register(mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return(nil)
+
+	dispClient := msgdispatcher.NewMockClient(t)
+	dispClient.EXPECT().Register(mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return(make(chan *msgstream.MsgPack), nil)
+
+	pipelineParams := &util.PipelineParams{
+		Ctx:                context.TODO(),
+		Session:            &sessionutil.Session{SessionRaw: sessionutil.SessionRaw{ServerID: 0}},
+		Broker:             mockBroker,
+		TimeTickSender:     &mockTimeSender{},
+		DispClient:         dispClient,
+		WriteBufferManager: wbm,
+	}
+
+	chanWatchInfo := generateChannelWatchInfo()
+	ds, err := NewDataSyncService(
+		context.TODO(),
+		pipelineParams,
+		chanWatchInfo,
+		util.NewTickler(),
+	)
+	assert.NoError(t, err)
+
+	fm := NewFlowgraphManager()
+	fm.AddFlowgraph(ds)
+	return ds.vchannelName, fm
+}
+
+func TestGetChannelsJSON(t *testing.T) {
+	paramtable.SetNodeID(1)
+	_, fm := newFlowGraphManager(t)
+	obj := []*metricsinfo.Channel{
+		{
+			Name:           "fake-ch-_1",
+			WatchState:     "Healthy",
+			LatestTimeTick: typeutil.TimestampToString(0),
+			NodeID:         paramtable.GetNodeID(),
+			CollectionID:   1,
+		},
+	}
+
+	expectedBytes, err := json.Marshal(obj)
+	assert.NoError(t, err)
+	expectedJSON := string(expectedBytes)
+
+	jsonResult := fm.GetChannelsJSON()
+	assert.JSONEq(t, expectedJSON, jsonResult)
+}
+
+func TestGetSegmentJSON(t *testing.T) {
+	ch, fm := newFlowGraphManager(t)
+	ds, ok := fm.GetFlowgraphService(ch)
+	assert.True(t, ok)
+
+	nodeID := paramtable.GetNodeID()
+	paramtable.SetNodeID(1)
+	defer paramtable.SetNodeID(nodeID)
+
+	pkStatsFactory := func(*datapb.SegmentInfo) pkoracle.PkStat {
+		return pkoracle.NewBloomFilterSet()
+	}
+	segment := &datapb.SegmentInfo{
+		ID:           1,
+		PartitionID:  10,
+		State:        commonpb.SegmentState_Flushed,
+		Level:        datapb.SegmentLevel_L1,
+		NumOfRows:    10240,
+		CollectionID: 1,
+	}
+
+	s := metrics.NewSegmentFrom(segment)
+	s.NodeID = 1
+	s.Channel = "fake-ch-_1"
+	s.FlushedRows = 10240
+
+	expectedBytes, err := json.Marshal([]*metricsinfo.Segment{s})
+	assert.NoError(t, err)
+	expectedJSON := string(expectedBytes)
+
+	ds.metacache.AddSegment(segment, pkStatsFactory, metacache.NoneBm25StatsFactory)
+	jsonResult := fm.GetSegmentsJSON()
+	fmt.Println(jsonResult)
+	assert.JSONEq(t, expectedJSON, jsonResult)
+}

internal/flushcommon/pipeline/mock_fgmanager.go

@@ -1,4 +1,4 @@
-// Code generated by mockery v2.32.4. DO NOT EDIT.
+// Code generated by mockery v2.46.0. DO NOT EDIT.
 
 package pipeline
 
@@ -114,10 +114,59 @@ func (_c *MockFlowgraphManager_Close_Call) RunAndReturn(run func()) *MockFlowgra
 	return _c
 }
 
+// GetChannelsJSON provides a mock function with given fields:
+func (_m *MockFlowgraphManager) GetChannelsJSON() string {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for GetChannelsJSON")
+	}
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func() string); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	return r0
+}
+
+// MockFlowgraphManager_GetChannelsJSON_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetChannelsJSON'
+type MockFlowgraphManager_GetChannelsJSON_Call struct {
+	*mock.Call
+}
+
+// GetChannelsJSON is a helper method to define mock.On call
+func (_e *MockFlowgraphManager_Expecter) GetChannelsJSON() *MockFlowgraphManager_GetChannelsJSON_Call {
+	return &MockFlowgraphManager_GetChannelsJSON_Call{Call: _e.mock.On("GetChannelsJSON")}
+}
+
+func (_c *MockFlowgraphManager_GetChannelsJSON_Call) Run(run func()) *MockFlowgraphManager_GetChannelsJSON_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockFlowgraphManager_GetChannelsJSON_Call) Return(_a0 string) *MockFlowgraphManager_GetChannelsJSON_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+func (_c *MockFlowgraphManager_GetChannelsJSON_Call) RunAndReturn(run func() string) *MockFlowgraphManager_GetChannelsJSON_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
 // GetCollectionIDs provides a mock function with given fields:
 func (_m *MockFlowgraphManager) GetCollectionIDs() []int64 {
 	ret := _m.Called()
 
+	if len(ret) == 0 {
+		panic("no return value specified for GetCollectionIDs")
+	}
+
 	var r0 []int64
 	if rf, ok := ret.Get(0).(func() []int64); ok {
 		r0 = rf()
@@ -161,6 +210,10 @@ func (_c *MockFlowgraphManager_GetCollectionIDs_Call) RunAndReturn(run func() []
 func (_m *MockFlowgraphManager) GetFlowgraphCount() int {
 	ret := _m.Called()
 
+	if len(ret) == 0 {
+		panic("no return value specified for GetFlowgraphCount")
+	}
+
 	var r0 int
 	if rf, ok := ret.Get(0).(func() int); ok {
 		r0 = rf()
@@ -202,6 +255,10 @@ func (_c *MockFlowgraphManager_GetFlowgraphCount_Call) RunAndReturn(run func() i
 func (_m *MockFlowgraphManager) GetFlowgraphService(channel string) (*DataSyncService, bool) {
 	ret := _m.Called(channel)
 
+	if len(ret) == 0 {
+		panic("no return value specified for GetFlowgraphService")
+	}
+
 	var r0 *DataSyncService
 	var r1 bool
 	if rf, ok := ret.Get(0).(func(string) (*DataSyncService, bool)); ok {
@@ -252,10 +309,59 @@ func (_c *MockFlowgraphManager_GetFlowgraphService_Call) RunAndReturn(run func(s
 	return _c
 }
 
+// GetSegmentsJSON provides a mock function with given fields:
+func (_m *MockFlowgraphManager) GetSegmentsJSON() string {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for GetSegmentsJSON")
+	}
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func() string); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	return r0
+}
+
+// MockFlowgraphManager_GetSegmentsJSON_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetSegmentsJSON'
+type MockFlowgraphManager_GetSegmentsJSON_Call struct {
+	*mock.Call
+}
+
+// GetSegmentsJSON is a helper method to define mock.On call
+func (_e *MockFlowgraphManager_Expecter) GetSegmentsJSON() *MockFlowgraphManager_GetSegmentsJSON_Call {
+	return &MockFlowgraphManager_GetSegmentsJSON_Call{Call: _e.mock.On("GetSegmentsJSON")}
+}
+
+func (_c *MockFlowgraphManager_GetSegmentsJSON_Call) Run(run func()) *MockFlowgraphManager_GetSegmentsJSON_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockFlowgraphManager_GetSegmentsJSON_Call) Return(_a0 string) *MockFlowgraphManager_GetSegmentsJSON_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+func (_c *MockFlowgraphManager_GetSegmentsJSON_Call) RunAndReturn(run func() string) *MockFlowgraphManager_GetSegmentsJSON_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
 // HasFlowgraph provides a mock function with given fields: channel
 func (_m *MockFlowgraphManager) HasFlowgraph(channel string) bool {
 	ret := _m.Called(channel)
 
+	if len(ret) == 0 {
+		panic("no return value specified for HasFlowgraph")
+	}
+
 	var r0 bool
 	if rf, ok := ret.Get(0).(func(string) bool); ok {
 		r0 = rf(channel)
@@ -298,6 +404,10 @@ func (_c *MockFlowgraphManager_HasFlowgraph_Call) RunAndReturn(run func(string)
 func (_m *MockFlowgraphManager) HasFlowgraphWithOpID(channel string, opID int64) bool {
 	ret := _m.Called(channel, opID)
 
+	if len(ret) == 0 {
+		panic("no return value specified for HasFlowgraphWithOpID")
+	}
+
 	var r0 bool
 	if rf, ok := ret.Get(0).(func(string, int64) bool); ok {
 		r0 = rf(channel, opID)

internal/flushcommon/syncmgr/task.go

@@ -422,10 +422,11 @@ func (t *SyncTask) MarshalJSON() ([]byte, error) {
 		SegmentID:     t.segmentID,
 		BatchRows:     t.batchRows,
 		SegmentLevel:  t.level.String(),
-		TsFrom:        t.tsFrom,
+		TSFrom:        t.tsFrom,
-		TsTo:          t.tsTo,
+		TSTo:          t.tsTo,
 		DeltaRowCount: t.deltaRowCount,
 		FlushSize:     t.flushedSize,
-		RunningTime:   t.execTime,
+		RunningTime:   t.execTime.String(),
+		NodeID:        paramtable.GetNodeID(),
 	})
 }

internal/flushcommon/syncmgr/task_test.go

@@ -35,10 +35,12 @@ import (
 	"github.com/milvus-io/milvus/internal/flushcommon/broker"
 	"github.com/milvus-io/milvus/internal/flushcommon/metacache"
 	"github.com/milvus-io/milvus/internal/flushcommon/metacache/pkoracle"
+	"github.com/milvus-io/milvus/internal/json"
 	"github.com/milvus-io/milvus/internal/mocks"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/storage"
 	"github.com/milvus-io/milvus/pkg/common"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/retry"
 	"github.com/milvus-io/milvus/pkg/util/tsoutil"
@@ -383,7 +385,7 @@ func (s *SyncTaskSuite) TestNextID() {
 }
 
 func (s *SyncTaskSuite) TestSyncTask_MarshalJSON() {
-	task := &SyncTask{
+	t := &SyncTask{
 		segmentID:     12345,
 		batchRows:     100,
 		level:         datapb.SegmentLevel_L0,
@@ -394,18 +396,22 @@ func (s *SyncTaskSuite) TestSyncTask_MarshalJSON() {
 		execTime:      2 * time.Second,
 	}
 
-	expectedJSON := `{
+	tm := &metricsinfo.SyncTask{
-        "segment_id": 12345,
+		SegmentID:     t.segmentID,
-        "batch_rows": 100,
+		BatchRows:     t.batchRows,
-        "segment_level": "L0",
+		SegmentLevel:  t.level.String(),
-        "ts_from": 1000,
+		TSFrom:        t.tsFrom,
-        "ts_to": 2000,
+		TSTo:          t.tsTo,
-        "delta_row_count": 10,
+		DeltaRowCount: t.deltaRowCount,
-        "flush_size": 1024,
+		FlushSize:     t.flushedSize,
-        "running_time": 2000000000
+		RunningTime:   t.execTime.String(),
-    }`
+		NodeID:        paramtable.GetNodeID(),
+	}
+	expectedBytes, err := json.Marshal(tm)
+	s.NoError(err)
+	expectedJSON := string(expectedBytes)
 
-	data, err := task.MarshalJSON()
+	data, err := t.MarshalJSON()
 	s.NoError(err)
 	s.JSONEq(expectedJSON, string(data))
 }

internal/flushcommon/util/timetick_sender.go

@@ -36,6 +36,7 @@ import (
 
 type StatsUpdater interface {
 	Update(channel string, ts typeutil.Timestamp, stats []*commonpb.SegmentStats)
+	GetLatestTimestamp(channel string) typeutil.Timestamp
 }
 
 // TimeTickSender is to merge channel states updated by flow graph node and send to datacoord periodically
@@ -126,6 +127,17 @@ func (m *TimeTickSender) Update(channelName string, timestamp uint64, segStats [
 	m.statsCache[channelName].lastTs = timestamp
 }
 
+func (m *TimeTickSender) GetLatestTimestamp(channel string) typeutil.Timestamp {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+	chStats, ok := m.statsCache[channel]
+	if !ok {
+		log.Warn("channel not found in TimeTickSender", zap.String("channel", channel))
+		return 0
+	}
+	return chStats.lastTs
+}
+
 func (m *TimeTickSender) assembleDatanodeTtMsg() ([]*msgpb.DataNodeTtMsg, map[string]uint64) {
 	m.mu.RLock()
 	defer m.mu.RUnlock()

internal/http/router.go

@@ -65,19 +65,46 @@ const (
 
 // for WebUI restful api root path
 const (
+	// ClusterInfoPath is the path to get cluster information.
 	ClusterInfoPath = "/_cluster/info"
+	// ClusterConfigsPath is the path to get cluster configurations.
 	ClusterConfigsPath = "/_cluster/configs"
+	// ClusterClientsPath is the path to get connected clients.
 	ClusterClientsPath = "/_cluster/clients"
+	// ClusterDependenciesPath is the path to get cluster dependencies.
 	ClusterDependenciesPath = "/_cluster/dependencies"
+	// HookConfigsPath is the path to get hook configurations.
 	HookConfigsPath = "/_hook/configs"
-	QCoordSegmentsPath      = "/_qcoord/segments"
-	QCoordChannelsPath      = "/_qcoord/channels"
-	QCoordAllTasksPath      = "/_qcoord/tasks/all"
 
-	DCoordAllTasksPath        = "/_dcoord/tasks/all"
+	// QCDistPath is the path to get QueryCoord distribution.
-	DCoordImportTasksPath     = "/_dcoord/tasks/import"
+	QCDistPath = "/_qc/dist"
-	DCoordCompactionTasksPath = "/_dcoord/tasks/compaction"
+	// QCTargetPath is the path to get QueryCoord target.
-	DCoordBuildIndexTasksPath = "/_dcoord/tasks/build_index"
+	QCTargetPath = "/_qc/target"
+	// QCReplicaPath is the path to get QueryCoord replica.
+	QCReplicaPath = "/_qc/replica"
+	// QCResourceGroupPath is the path to get QueryCoord resource group.
+	QCResourceGroupPath = "/_qc/resource_group"
+	// QCAllTasksPath is the path to get all tasks in QueryCoord.
+	QCAllTasksPath = "/_qc/tasks"
 
-	DNodeSyncTasksPath = "/_dnode/tasks/sync"
+	// QNSegmentsPath is the path to get segments in QueryNode.
+	QNSegmentsPath = "/_qn/segments"
+	// QNChannelsPath is the path to get channels in QueryNode.
+	QNChannelsPath = "/_qn/channels"
+
+	// DCDistPath is the path to get all segments and channels distribution in DataCoord.
+	DCDistPath = "/_dc/dist"
+	// DCImportTasksPath is the path to get import tasks in DataCoord.
+	DCImportTasksPath = "/_dc/tasks/import"
+	// DCCompactionTasksPath is the path to get compaction tasks in DataCoord.
+	DCCompactionTasksPath = "/_dc/tasks/compaction"
+	// DCBuildIndexTasksPath is the path to get build index tasks in DataCoord.
+	DCBuildIndexTasksPath = "/_dc/tasks/build_index"
+
+	// DNSyncTasksPath is the path to get sync tasks in DataNode.
+	DNSyncTasksPath = "/_dn/tasks/sync"
+	// DNSegmentsPath is the path to get segments in DataNode.
+	DNSegmentsPath = "/_dn/segments"
+	// DNChannelsPath is the path to get channels in DataNode.
+	DNChannelsPath = "/_dn/channels"
 )

internal/http/webui/header.html

@@ -7,9 +7,6 @@
             </button> <a class="navbar-brand active" href="index.html">Home</a>
             <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                 <ul class="navbar-nav">
-                    <li class="nav-item">
-                        <a class="nav-link" href="nodes.html">Nodes</a>
-                    </li>
                     <li class="nav-item">
                         <a class="nav-link" href="collections.html">Collections</a>
                     </li>

internal/http/webui/index.html

@@ -30,7 +30,29 @@
       <h2>
         Component Information
       </h2>
-      <table id="components" class="table table-hover"></table>
+
+      <!-- Navigation Tabs -->
+      <ul class="nav nav-tabs" id="componentTabs" role="tablist">
+        <li class="nav-item">
+          <a class="nav-link active" id="base-stats-tab" data-toggle="tab" href="#base-stats" role="tab" aria-controls="base-stats" aria-selected="true">Base Stats</a>
+        </li>
+        <li class="nav-item">
+          <a class="nav-link" id="runtime-metrics-tab" data-toggle="tab" href="#runtime-metrics" role="tab" aria-controls="runtime-metrics" aria-selected="false">Runtime Metrics</a>
+        </li>
+      </ul>
+
+      <!-- Tab Content -->
+      <div class="tab-content" id="componentTabsContent">
+        <!-- Components Table (Base Stats) -->
+        <div class="tab-pane fade show active" id="base-stats" role="tabpanel" aria-labelledby="base-stats-tab">
+          <table id="components" class="table table-hover mt-3"></table>
+        </div>
+
+        <!-- Node Metrics Table (Runtime Metrics) -->
+        <div class="tab-pane fade" id="runtime-metrics" role="tabpanel" aria-labelledby="runtime-metrics-tab">
+          <table id="nodeMetrics" class="table table-hover mt-3"></table>
+        </div>
+      </div>
 
       <h2>
         Connected Clients
@@ -58,6 +80,7 @@
             .then(data => {
               renderSysInfo(data);
               renderComponentInfo(data);
+              renderNodesMetrics(data)
             })
             .catch(error => {
               handleError(error);

internal/http/webui/nodes.html

@@ -1,62 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8">
-    <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>Milvus WebUI - Nodes</title>
-    <meta name="description" content="Milvus Management WebUI">
-    <link href="./static/css/bootstrap.min.css" rel="stylesheet">
-    <link href="./static/css/style.css" rel="stylesheet">
-    <script src="./static/js/jquery.min.js"></script>
-    <script src="./static/js/bootstrap.min.js"></script>
-    <script src="./static/js/bootstrap.bundle.min.js"></script>
-    <script src="./static/js/render.js"></script>
-    <script src="./static/js/common.js"></script>
-    <script src="./static/js/mockdata.js"></script>
-</head>
-<body>
-<div class="container-fluid">
-    <div id="header"></div>
-    <div class="row">
-        <div class="col-md-2"></div>
-        <div class="col-md-8">
-            <h2>
-                Activity Metrics
-            </h2>
-            <table id="nodeMetrics" class="table table-hover"></table>
-
-            <h2>
-                Replica
-            </h2>
-            <table id="replica" class="table table-hover"></table>
-
-            <h2>
-                Resource Group
-            </h2>
-            <table id="rg" class="table table-hover"></table>
-        </div>
-        <div class="col-md-2"></div>
-    <div id="footer"></div>
-    </div>
-</div>
-
-<script>
-    $(document).ready(function(){
-        $('#header').load("header.html");
-        $('#footer').load("footer.html");
-    });
-
-    // load nodes information data
-    document.addEventListener("DOMContentLoaded", function() {
-        fetchData(MILVUS_URI + "/_cluster/info", sysmetrics)
-            .then(data => {
-                renderNodesMetrics(data)
-            })
-            .catch(error => {
-                handleError(error);
-            });
-    });
-</script>
-</body>
-</html>

internal/http/webui/static/js/mockdata.js

@@ -412,6 +412,179 @@ var mconfigs = `
 }
 `;
 
+var qcTargets = `
+[
+  {
+    "collection_id": 1,
+    "segments": [
+      {
+        "segment_id": 1,
+        "collection_id": 1,
+        "partition_id": 1,
+        "channel": "channel1",
+        "num_of_rows": 1000,
+        "state": "Sealed",
+        "is_importing": false,
+        "compacted": false,
+        "level": "L0",
+        "is_sorted": true,
+        "node_id": 1,
+        "is_invisible": false,
+        "loaded_timestamp": 1633072800,
+        "index": [
+          {
+            "field_id": 1,
+            "index_id": 1,
+            "build_id": 1,
+            "index_size": 1024,
+            "is_loaded": true
+          }
+        ],
+        "resource_group": "rg1",
+        "loaded_insert_row_count": 1000,
+        "mem_size": 2048,
+      }
+    ],
+    "dm_channels": [
+      {
+        "node_id": 1,
+        "version": 1,
+        "collection_id": 1,
+        "channel_name": "channel1",
+        "unflushed_segment_ids": [1],
+        "flushed_segment_ids": [2],
+        "dropped_segment_ids": [3],
+        "level_zero_segment_ids": [4],
+        "partition_stats_versions": {
+          "1": 1
+        }
+      }
+    ]
+  }
+]
+`
+
+var qcDist =`
+{
+  "segments": [
+    {
+      "segment_id": 1,
+      "collection_id": 1,
+      "partition_id": 1,
+      "channel": "channel1",
+      "num_of_rows": 1000,
+      "state": "Sealed",
+      "is_importing": false,
+      "compacted": false,
+      "level": "L0",
+      "is_sorted": true,
+      "node_id": 1,
+      "is_invisible": false,
+      "loaded_timestamp": 1633072800,
+      "index": [
+        {
+          "field_id": 1,
+          "index_id": 1,
+          "build_id": 1,
+          "index_size": 1024,
+          "is_loaded": true
+        }
+      ],
+      "resource_group": "rg1",
+      "loaded_insert_row_count": 1000,
+      "mem_size": 2048,
+    }
+  ],
+  "dm_channels": [
+    {
+      "node_id": 1,
+      "version": 1,
+      "collection_id": 1,
+      "channel_name": "channel1",
+      "unflushed_segment_ids": [1],
+      "flushed_segment_ids": [2],
+      "dropped_segment_ids": [3],
+      "level_zero_segment_ids": [4],
+      "partition_stats_versions": {
+        "1": 1
+      }
+    }
+  ],
+  "leader_views": [
+    {
+      "node_id": 1,
+      "collection_id": 1,
+      "channel_name": "channel1",
+      "segments": [
+        {
+          "segment_id": 1,
+          "partition_id": 1,
+          "num_of_rows": 1000,
+          "state": "Sealed",
+          "is_importing": false,
+          "compacted": false,
+          "level": "L0",
+          "is_sorted": true,
+          "node_id": 1,
+          "is_invisible": false,
+          "loaded_timestamp": 1633072800,
+          "index": [
+            {
+              "field_id": 1,
+              "index_id": 1,
+              "build_id": 1,
+              "index_size": 1024,
+              "is_loaded": true
+            }
+          ],
+          "resource_group": "rg1",
+          "loaded_insert_row_count": 1000,
+          "mem_size": 2048,
+        }
+      ]
+    }
+  ]
+}
+`
+
+var qcReplica = `
+[
+  {
+    "ID": 1,
+    "CollectionID": 1,
+    "RWNodes": [1, 2],
+    "ResourceGroup": "rg1",
+    "RONodes": [3],
+    "ChannelToRWNodes": {
+      "channel1": [1, 2]
+    }
+  },
+  {
+    "ID": 2,
+    "CollectionID": 2,
+    "RWNodes": [4, 5],
+    "ResourceGroup": "rg2",
+    "RONodes": [6],
+    "ChannelToRWNodes": {
+      "channel2": [4, 5]
+    }
+  }
+]
+`
+
+var qcResourceGroup = `
+[
+  {
+    "Name": "rg1",
+    "Nodes": [1, 2]
+  },
+  {
+    "Name": "rg2",
+    "Nodes": [3, 4]
+  }
+]
+`
+
 var qcTasks = `
 [
   {
@@ -456,6 +629,119 @@ var qcTasks = `
 ]
 `
 
+var qn_segments = `
+[
+  {
+    "segment_id": 1,
+    "collection_id": 1,
+    "partition_id": 1,
+    "channel": "channel1",
+    "num_of_rows": 1000,
+    "state": "Sealed",
+    "is_importing": false,
+    "compacted": false,
+    "level": "L1",
+    "is_sorted": true,
+    "node_id": 1,
+    "is_invisible": false,
+    "loaded_timestamp": 1620000000,
+    "index": [
+      {
+        "field_id": 1,
+        "index_id": 1,
+        "build_id": 1,
+        "index_size": 1024,
+        "is_loaded": true
+      }
+    ],
+    "resource_group": "rg1",
+    "loaded_insert_row_count": 1000,
+    "mem_size": 2048,
+  },
+  {
+    "segment_id": 2,
+    "collection_id": 2,
+    "partition_id": 2,
+    "channel": "channel2",
+    "num_of_rows": 2000,
+    "state": "Sealed",
+    "is_importing": false,
+    "compacted": false,
+    "level": "L2",
+    "is_sorted": true,
+    "node_id": 2,
+    "is_invisible": false,
+    "loaded_timestamp": 1620000001,
+    "index": [
+      {
+        "field_id": 2,
+        "index_id": 2,
+        "build_id": 2,
+        "index_size": 2048,
+        "is_loaded": true
+      }
+    ],
+    "resource_group": "rg2",
+    "loaded_insert_row_count": 2000,
+    "mem_size": 4096,
+  }
+]
+`
+
+var qn_channels = `
+[
+  {
+    "name": "channel1",
+    "watch_state": "Healthy",
+    "assign_state": "assigned",
+    "latest_time_tick": "2023-10-01 12:00:00",
+    "node_id": 1,
+    "collection_id": 1,
+  },
+  {
+    "name": "channel2",
+    "watch_state": "Healthy",
+    "assign_state": "assigned",
+    "latest_time_tick": "2023-10-01 12:05:00",
+    "node_id": 2,
+    "collection_id": 2,
+  }
+]
+`
+
+var dc_dist = `
+{
+  "segments": [
+    {
+      "segment_id": 1,
+      "collection_id": 100,
+      "partition_id": 10,
+      "channel": "channel1",
+      "num_of_rows": 1000,
+      "state": "flushed",
+      "is_importing": false,
+      "compacted": false,
+      "level": "L1",
+      "is_sorted": true,
+      "node_id": 1
+    }
+  ],
+  "dm_channels": [
+    {
+      "node_id": 1,
+      "version": 1,
+      "collection_id": 100,
+      "channel_name": "channel1",
+      "unflushed_segment_ids": [1, 2, 3],
+      "flushed_segment_ids": [4, 5, 6],
+      "dropped_segment_ids": [7, 8, 9],
+      "watch_state": "success",
+      "start_watch_ts": 123456789
+    }
+  ]
+}
+`
+
 var dc_build_index_task = `
 [
   {
@@ -485,30 +771,31 @@ var dc_compaction_task = `
 [
   {
     "plan_id": 1,
-    "collection_id": 1001,
+    "collection_id": 1,
     "type": "Merge",
     "state": "Completed",
-    "start_time": 1633036800,
+    "fail_reason": "",
-    "end_time": 1633040400,
+    "start_time": 1620000000,
-    "total_rows": 100000,
+    "end_time": 1620003600,
+    "total_rows": 10000,
     "input_segments": [1, 2, 3],
     "result_segments": [4]
   },
   {
     "plan_id": 2,
-    "collection_id": 1002,
+    "collection_id": 2,
     "type": "Merge",
     "state": "Failed",
     "fail_reason": "Disk full",
-    "start_time": 1633123200,
+    "start_time": 1620007200,
-    "end_time": 1633126800,
+    "end_time": 1620010800,
-    "total_rows": 200000,
+    "total_rows": 20000,
     "input_segments": [5, 6, 7],
-    "result_segments": [8]
+    "result_segments": []
   }
 ]`
 
-var dc_sync_task = `
+var dn_sync_task = `
 [
   {
     "segment_id": 1,
@@ -518,7 +805,8 @@ var dc_sync_task = `
     "ts_to": 1633040400,
     "delta_row_count": 10,
     "flush_size": 1024,
-    "running_time": 100000000
+    "running_time": "100000000",
+    "node_id": 1
   },
   {
     "segment_id": 2,
@@ -528,7 +816,8 @@ var dc_sync_task = `
     "ts_to": 1633126800,
     "delta_row_count": 20,
     "flush_size": 2048,
-    "running_time": 200000000
+    "running_time": "200000000",
+    "node_id": 2
   }
 ]
 `
@@ -570,3 +859,63 @@ var dc_import_task = `
   }
 ]
 `
+
+var dn_segments = `
+[
+  {
+    "segment_id": 1,
+    "collection_id": 1,
+    "partition_id": 1,
+    "channel": "channel1",
+    "num_of_rows": 1000,
+    "state": "active",
+    "is_importing": false,
+    "compacted": false,
+    "level": "L1",
+    "is_sorted": true,
+    "node_id": 1,
+    "flushed_rows": 1000,
+    "sync_buffer_rows": 0,
+    "syncing_rows": 0
+  },
+  {
+    "segment_id": 2,
+    "collection_id": 2,
+    "partition_id": 2,
+    "channel": "channel2",
+    "num_of_rows": 2000,
+    "state": "inactive",
+    "is_importing": true,
+    "compacted": true,
+    "level": "L2",
+    "is_sorted": false,
+    "node_id": 2,
+    "flushed_rows": 2000,
+    "sync_buffer_rows": 100,
+    "syncing_rows": 50
+  }
+]
+`
+
+var dn_channels = `
+[
+  {
+    "name": "channel1",
+    "watch_state": "Healthy",
+    "assign_state": "assigned",
+    "latest_time_tick": "2023-10-01 12:00:00",
+    "node_id": 1,
+    "collection_id": 1,
+    "check_point_ts": "2023-10-01 12:00:00"
+  },
+  {
+    "name": "channel2",
+    "watch_state": "Healthy",
+    "assign_state": "assigned",
+    "latest_time_tick": "2023-10-01 12:05:00",
+    "node_id": 2,
+    "collection_id": 2,
+    "check_point_ts": "2023-10-01 12:05:00"
+  }
+]
+`

internal/proxy/impl.go

@@ -6503,26 +6503,34 @@ func DeregisterSubLabel(subLabel string) {
 
 // RegisterRestRouter registers the router for the proxy
 func (node *Proxy) RegisterRestRouter(router gin.IRouter) {
-	// Cluster request
+	// Cluster request that executed by proxy
 	router.GET(http.ClusterInfoPath, getClusterInfo(node))
 	router.GET(http.ClusterConfigsPath, getConfigs(paramtable.Get().GetAll()))
 	router.GET(http.ClusterClientsPath, getConnectedClients)
 	router.GET(http.ClusterDependenciesPath, getDependencies)
 
-	// Hook request
+	// Hook request that executed by proxy
 	router.GET(http.HookConfigsPath, getConfigs(paramtable.GetHookParams().GetAll()))
 
-	// QueryCoord request
+	// QueryCoord requests that are forwarded from proxy
-	router.GET(http.QCoordSegmentsPath, getQueryComponentMetrics(node, metricsinfo.QuerySegmentDist))
+	router.GET(http.QCTargetPath, getQueryComponentMetrics(node, metricsinfo.QueryTarget))
-	router.GET(http.QCoordChannelsPath, getQueryComponentMetrics(node, metricsinfo.QueryChannelDist))
+	router.GET(http.QCDistPath, getQueryComponentMetrics(node, metricsinfo.QueryDist))
-	router.GET(http.QCoordAllTasksPath, getQueryComponentMetrics(node, metricsinfo.QueryCoordAllTasks))
+	router.GET(http.QCReplicaPath, getQueryComponentMetrics(node, metricsinfo.QueryReplicas))
+	router.GET(http.QCResourceGroupPath, getQueryComponentMetrics(node, metricsinfo.QueryResourceGroups))
+	router.GET(http.QCAllTasksPath, getQueryComponentMetrics(node, metricsinfo.QueryCoordAllTasks))
 
-	// DataCoord request
+	// QueryNode requests that are forwarded from querycoord
-	router.GET(http.DCoordAllTasksPath, getDataComponentMetrics(node, metricsinfo.DataCoordAllTasks))
+	router.GET(http.QNSegmentsPath, getQueryComponentMetrics(node, metricsinfo.QuerySegments))
-	router.GET(http.DCoordCompactionTasksPath, getDataComponentMetrics(node, metricsinfo.CompactionTasks))
+	router.GET(http.QNChannelsPath, getQueryComponentMetrics(node, metricsinfo.QueryChannels))
-	router.GET(http.DCoordImportTasksPath, getDataComponentMetrics(node, metricsinfo.ImportTasks))
-	router.GET(http.DCoordBuildIndexTasksPath, getDataComponentMetrics(node, metricsinfo.BuildIndexTasks))
 
-	// Datanode request
+	// DataCoord requests that are forwarded from proxy
-	router.GET(http.DNodeSyncTasksPath, getDataComponentMetrics(node, metricsinfo.SyncTasks))
+	router.GET(http.DCDistPath, getDataComponentMetrics(node, metricsinfo.DataDist))
+	router.GET(http.DCCompactionTasksPath, getDataComponentMetrics(node, metricsinfo.CompactionTasks))
+	router.GET(http.DCImportTasksPath, getDataComponentMetrics(node, metricsinfo.ImportTasks))
+	router.GET(http.DCBuildIndexTasksPath, getDataComponentMetrics(node, metricsinfo.BuildIndexTasks))
+
+	// Datanode requests that are forwarded from datacoord
+	router.GET(http.DNSyncTasksPath, getDataComponentMetrics(node, metricsinfo.SyncTasks))
+	router.GET(http.DNSegmentsPath, getDataComponentMetrics(node, metricsinfo.DataSegments))
+	router.GET(http.DNChannelsPath, getDataComponentMetrics(node, metricsinfo.DataChannels))
 }

internal/proxy/impl_test.go

@@ -1880,14 +1880,14 @@ func TestRegisterRestRouter(t *testing.T) {
 		path       string
 		statusCode int
 	}{
-		{path: mhttp.QCoordSegmentsPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.QCTargetPath, statusCode: http.StatusInternalServerError},
-		{path: mhttp.QCoordChannelsPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.QCDistPath, statusCode: http.StatusInternalServerError},
-		{path: mhttp.QCoordAllTasksPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.QCAllTasksPath, statusCode: http.StatusInternalServerError},
-		{path: mhttp.DNodeSyncTasksPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.DNSyncTasksPath, statusCode: http.StatusInternalServerError},
-		{path: mhttp.DCoordCompactionTasksPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.DCCompactionTasksPath, statusCode: http.StatusInternalServerError},
-		{path: mhttp.DCoordImportTasksPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.DCImportTasksPath, statusCode: http.StatusInternalServerError},
-		{path: mhttp.DCoordBuildIndexTasksPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.DCBuildIndexTasksPath, statusCode: http.StatusInternalServerError},
-		{path: mhttp.DNodeSyncTasksPath, statusCode: http.StatusInternalServerError},
+		{path: mhttp.DNSyncTasksPath, statusCode: http.StatusInternalServerError},
 	}
 
 	for _, tt := range tests {

internal/querycoordv2/handlers.go

@@ -18,12 +18,14 @@ package querycoordv2
 
 import (
 	"context"
+	"encoding/json"
 	"sync"
 	"time"
 
 	"github.com/cockroachdb/errors"
 	"github.com/samber/lo"
 	"go.uber.org/zap"
+	"golang.org/x/sync/errgroup"
 
 	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
@@ -34,6 +36,7 @@ import (
 	"github.com/milvus-io/milvus/internal/querycoordv2/utils"
 	"github.com/milvus-io/milvus/pkg/log"
 	"github.com/milvus-io/milvus/pkg/util/hardware"
+	"github.com/milvus-io/milvus/pkg/util/merr"
 	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
@@ -242,6 +245,52 @@ func (s *Server) balanceChannels(ctx context.Context,
 	return nil
 }
 
+func getMetrics[T any](ctx context.Context, s *Server, req *milvuspb.GetMetricsRequest) ([]T, error) {
+	var metrics []T
+	var mu sync.Mutex
+	errorGroup, ctx := errgroup.WithContext(ctx)
+
+	for _, node := range s.nodeMgr.GetAll() {
+		node := node
+		errorGroup.Go(func() error {
+			resp, err := s.cluster.GetMetrics(ctx, node.ID(), req)
+			if err := merr.CheckRPCCall(resp, err); err != nil {
+				log.Warn("failed to get metric from QueryNode", zap.Int64("nodeID", node.ID()))
+				return err
+			}
+
+			if resp.Response == "" {
+				return nil
+			}
+
+			infos := make([]T, 0)
+			err = json.Unmarshal([]byte(resp.Response), &infos)
+			if err != nil {
+				log.Warn("invalid metrics of query node was found", zap.Error(err))
+				return err
+			}
+
+			mu.Lock()
+			metrics = append(metrics, infos...)
+			mu.Unlock()
+			return nil
+		})
+	}
+	err := errorGroup.Wait()
+
+	return metrics, err
+}
+
+func (s *Server) getChannelsFromQueryNode(ctx context.Context, req *milvuspb.GetMetricsRequest) (string, error) {
+	channels, err := getMetrics[*metricsinfo.Channel](ctx, s, req)
+	return metricsinfo.MarshalGetMetricsValues(channels, err)
+}
+
+func (s *Server) getSegmentsFromQueryNode(ctx context.Context, req *milvuspb.GetMetricsRequest) (string, error) {
+	segments, err := getMetrics[*metricsinfo.Segment](ctx, s, req)
+	return metricsinfo.MarshalGetMetricsValues(segments, err)
+}
+
 // TODO(dragondriver): add more detail metrics
 func (s *Server) getSystemInfoMetrics(
 	ctx context.Context,

internal/querycoordv2/handlers_test.go

@@ -0,0 +1,108 @@
+// Licensed to the LF AI & Data foundation under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package querycoordv2
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+
+	"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
+	"github.com/milvus-io/milvus/internal/querycoordv2/session"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
+)
+
+func TestGetChannelsFromQueryNode(t *testing.T) {
+	mockCluster := session.NewMockCluster(t)
+	nodeManager := session.NewNodeManager()
+	nodeManager.Add(session.NewNodeInfo(session.ImmutableNodeInfo{NodeID: 1}))
+	server := &Server{cluster: mockCluster, nodeMgr: nodeManager}
+	req := &milvuspb.GetMetricsRequest{}
+	expectedChannels := []*metricsinfo.Channel{
+		{
+			Name:           "channel1",
+			WatchState:     "Healthy",
+			LatestTimeTick: "1",
+			NodeID:         int64(1),
+			CollectionID:   int64(100),
+		},
+		{
+			Name:           "channel2",
+			WatchState:     "Healthy",
+			LatestTimeTick: "2",
+			NodeID:         int64(2),
+			CollectionID:   int64(200),
+		},
+	}
+	resp := &milvuspb.GetMetricsResponse{
+		Response: func() string {
+			data, _ := json.Marshal(expectedChannels)
+			return string(data)
+		}(),
+	}
+	mockCluster.EXPECT().GetMetrics(mock.Anything, mock.Anything, req).Return(resp, nil)
+	result, err := server.getChannelsFromQueryNode(context.Background(), req)
+	assert.NoError(t, err)
+
+	var actualChannels []*metricsinfo.Channel
+	err = json.Unmarshal([]byte(result), &actualChannels)
+	assert.NoError(t, err)
+	assert.Equal(t, expectedChannels, actualChannels)
+}
+
+func TestGetSegmentsFromQueryNode(t *testing.T) {
+	mockCluster := session.NewMockCluster(t)
+	nodeManager := session.NewNodeManager()
+	nodeManager.Add(session.NewNodeInfo(session.ImmutableNodeInfo{NodeID: 1}))
+	server := &Server{cluster: mockCluster, nodeMgr: nodeManager}
+	expectedSegments := []*metricsinfo.Segment{
+		{
+			SegmentID:            1,
+			PartitionID:          1,
+			Channel:              "channel1",
+			ResourceGroup:        "default",
+			MemSize:              int64(1024),
+			LoadedInsertRowCount: 100,
+		},
+		{
+			SegmentID:            2,
+			PartitionID:          1,
+			Channel:              "channel2",
+			ResourceGroup:        "default",
+			MemSize:              int64(1024),
+			LoadedInsertRowCount: 200,
+		},
+	}
+	resp := &milvuspb.GetMetricsResponse{
+		Response: func() string {
+			data, _ := json.Marshal(expectedSegments)
+			return string(data)
+		}(),
+	}
+	req := &milvuspb.GetMetricsRequest{}
+	mockCluster.EXPECT().GetMetrics(mock.Anything, mock.Anything, req).Return(resp, nil)
+
+	result, err := server.getSegmentsFromQueryNode(context.Background(), req)
+	assert.NoError(t, err)
+
+	var actualSegments []*metricsinfo.Segment
+	err = json.Unmarshal([]byte(result), &actualSegments)
+	assert.NoError(t, err)
+	assert.Equal(t, expectedSegments, actualSegments)
+}

internal/querycoordv2/meta/channel_dist_manager.go

@@ -23,6 +23,8 @@ import (
 	"google.golang.org/protobuf/proto"
 
 	"github.com/milvus-io/milvus/internal/proto/datapb"
+	"github.com/milvus-io/milvus/internal/util/metrics"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -130,6 +132,13 @@ func (channel *DmChannel) Clone() *DmChannel {
 	}
 }
 
+func newDmChannelMetricsFrom(channel *DmChannel) *metricsinfo.DmChannel {
+	dmChannel := metrics.NewDMChannelFrom(channel.VchannelInfo)
+	dmChannel.NodeID = channel.Node
+	dmChannel.Version = channel.Version
+	return dmChannel
+}
+
 type nodeChannels struct {
 	channels []*DmChannel
 	// collection id => channels
@@ -290,3 +299,16 @@ func (m *ChannelDistManager) updateCollectionIndex() {
 		}
 	}
 }
+
+func (m *ChannelDistManager) GetChannelDist() []*metricsinfo.DmChannel {
+	m.rwmutex.RLock()
+	defer m.rwmutex.RUnlock()
+
+	var channels []*metricsinfo.DmChannel
+	for _, nodeChannels := range m.channels {
+		for _, channel := range nodeChannels.channels {
+			channels = append(channels, newDmChannelMetricsFrom(channel))
+		}
+	}
+	return channels
+}

internal/querycoordv2/meta/channel_dist_manager_test.go

@@ -19,10 +19,12 @@ package meta
 import (
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
 
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -185,3 +187,42 @@ func (suite *ChannelDistManagerSuite) AssertCollection(channels []*DmChannel, co
 func TestChannelDistManager(t *testing.T) {
 	suite.Run(t, new(ChannelDistManagerSuite))
 }
+
+func TestGetChannelDistJSON(t *testing.T) {
+	manager := NewChannelDistManager()
+	channel1 := DmChannelFromVChannel(&datapb.VchannelInfo{
+		CollectionID: 100,
+		ChannelName:  "channel-1",
+	})
+	channel1.Node = 1
+	channel1.Version = 1
+
+	channel2 := DmChannelFromVChannel(&datapb.VchannelInfo{
+		CollectionID: 200,
+		ChannelName:  "channel-2",
+	})
+	channel2.Node = 2
+	channel2.Version = 1
+
+	manager.Update(1, channel1)
+	manager.Update(2, channel2)
+
+	channels := manager.GetChannelDist()
+	assert.Equal(t, 2, len(channels))
+
+	checkResult := func(channel *metricsinfo.DmChannel) {
+		if channel.NodeID == 1 {
+			assert.Equal(t, "channel-1", channel.ChannelName)
+			assert.Equal(t, int64(100), channel.CollectionID)
+		} else if channel.NodeID == 2 {
+			assert.Equal(t, "channel-2", channel.ChannelName)
+			assert.Equal(t, int64(200), channel.CollectionID)
+		} else {
+			assert.Failf(t, "unexpected node id", "unexpected node id %d", channel.NodeID)
+		}
+	}
+
+	for _, channel := range channels {
+		checkResult(channel)
+	}
+}

internal/querycoordv2/meta/dist_manager.go

@@ -16,6 +16,15 @@
 
 package meta
 
+import (
+	"encoding/json"
+
+	"go.uber.org/zap"
+
+	"github.com/milvus-io/milvus/pkg/log"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
+)
+
 type DistributionManager struct {
 	*SegmentDistManager
 	*ChannelDistManager
@@ -29,3 +38,30 @@ func NewDistributionManager() *DistributionManager {
 		LeaderViewManager:  NewLeaderViewManager(),
 	}
 }
+
+// GetDistributionJSON returns a JSON representation of the current distribution state.
+// It includes segments, DM channels, and leader views.
+// If there are no segments, channels, or leader views, it returns an empty string.
+// In case of an error during JSON marshaling, it returns the error.
+func (dm *DistributionManager) GetDistributionJSON() string {
+	segments := dm.GetSegmentDist()
+	channels := dm.GetChannelDist()
+	leaderView := dm.GetLeaderView()
+
+	if len(segments) == 0 && len(channels) == 0 && len(leaderView) == 0 {
+		return ""
+	}
+
+	dist := &metricsinfo.QueryCoordDist{
+		Segments:    segments,
+		DMChannels:  channels,
+		LeaderViews: leaderView,
+	}
+
+	v, err := json.Marshal(dist)
+	if err != nil {
+		log.Warn("failed to marshal dist", zap.Error(err))
+		return ""
+	}
+	return string(v)
+}

internal/querycoordv2/meta/dist_manager_test.go

@@ -0,0 +1,94 @@
+package meta
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
+	"github.com/milvus-io/milvus/internal/proto/datapb"
+	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
+)
+
+func TestGetDistributionJSON(t *testing.T) {
+	// Initialize DistributionManager
+	manager := NewDistributionManager()
+
+	// Add some segments to the SegmentDistManager
+	segment1 := SegmentFromInfo(&datapb.SegmentInfo{
+		ID:            1,
+		CollectionID:  100,
+		PartitionID:   10,
+		InsertChannel: "channel-1",
+		NumOfRows:     1000,
+		State:         commonpb.SegmentState_Flushed,
+	})
+	segment1.Node = 1
+	segment1.Version = 1
+
+	segment2 := SegmentFromInfo(&datapb.SegmentInfo{
+		ID:            2,
+		CollectionID:  200,
+		PartitionID:   20,
+		InsertChannel: "channel-2",
+		NumOfRows:     2000,
+		State:         commonpb.SegmentState_Flushed,
+	})
+	segment2.Node = 2
+	segment2.Version = 1
+
+	manager.SegmentDistManager.Update(1, segment1)
+	manager.SegmentDistManager.Update(2, segment2)
+
+	// Add some channels to the ChannelDistManager
+	channel1 := DmChannelFromVChannel(&datapb.VchannelInfo{
+		CollectionID: 100,
+		ChannelName:  "channel-1",
+	})
+	channel1.Node = 1
+	channel1.Version = 1
+
+	channel2 := DmChannelFromVChannel(&datapb.VchannelInfo{
+		CollectionID: 200,
+		ChannelName:  "channel-2",
+	})
+	channel2.Node = 2
+	channel2.Version = 1
+
+	manager.ChannelDistManager.Update(1, channel1)
+	manager.ChannelDistManager.Update(2, channel2)
+
+	// Add some leader views to the LeaderViewManager
+	leaderView1 := &LeaderView{
+		ID:           1,
+		CollectionID: 100,
+		Channel:      "channel-1",
+		Version:      1,
+		Segments:     map[int64]*querypb.SegmentDist{1: {NodeID: 1}},
+	}
+
+	leaderView2 := &LeaderView{
+		ID:           2,
+		CollectionID: 200,
+		Channel:      "channel-2",
+		Version:      1,
+		Segments:     map[int64]*querypb.SegmentDist{2: {NodeID: 2}},
+	}
+
+	manager.LeaderViewManager.Update(1, leaderView1)
+	manager.LeaderViewManager.Update(2, leaderView2)
+
+	// Call GetDistributionJSON
+	jsonOutput := manager.GetDistributionJSON()
+
+	// Verify JSON output
+	var dist metricsinfo.QueryCoordDist
+	err := json.Unmarshal([]byte(jsonOutput), &dist)
+	assert.NoError(t, err)
+
+	assert.Len(t, dist.Segments, 2)
+	assert.Len(t, dist.DMChannels, 2)
+	assert.Len(t, dist.LeaderViews, 2)
+}

internal/querycoordv2/meta/leader_view_manager.go

@@ -22,6 +22,7 @@ import (
 	"github.com/samber/lo"
 
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -314,3 +315,46 @@ func (mgr *LeaderViewManager) GetLatestShardLeaderByFilter(filters ...LeaderView
 		return v1.Version > v2.Version
 	})
 }
+
+// GetLeaderView returns a slice of LeaderView objects, each representing the state of a leader node.
+// It traverses the views map, converts each LeaderView to a metricsinfo.LeaderView, and collects them into a slice.
+// The method locks the views map for reading to ensure thread safety.
+func (mgr *LeaderViewManager) GetLeaderView() []*metricsinfo.LeaderView {
+	mgr.rwmutex.RLock()
+	defer mgr.rwmutex.RUnlock()
+
+	var leaderViews []*metricsinfo.LeaderView
+	for _, nodeViews := range mgr.views {
+		for _, lv := range nodeViews.views {
+			errString := ""
+			if lv.UnServiceableError != nil {
+				errString = lv.UnServiceableError.Error()
+			}
+			leaderView := &metricsinfo.LeaderView{
+				LeaderID:           lv.ID,
+				CollectionID:       lv.CollectionID,
+				Channel:            lv.Channel,
+				Version:            lv.Version,
+				SealedSegments:     make([]*metricsinfo.Segment, 0, len(lv.Segments)),
+				GrowingSegments:    make([]*metricsinfo.Segment, 0, len(lv.GrowingSegments)),
+				TargetVersion:      lv.TargetVersion,
+				NumOfGrowingRows:   lv.NumOfGrowingRows,
+				UnServiceableError: errString,
+			}
+
+			for segID, seg := range lv.Segments {
+				leaderView.SealedSegments = append(leaderView.SealedSegments, &metricsinfo.Segment{
+					SegmentID: segID,
+					NodeID:    seg.NodeID,
+				})
+			}
+
+			for _, seg := range lv.GrowingSegments {
+				leaderView.GrowingSegments = append(leaderView.GrowingSegments, newSegmentMetricsFrom(seg))
+			}
+
+			leaderViews = append(leaderViews, leaderView)
+		}
+	}
+	return leaderViews
+}

internal/querycoordv2/meta/leader_view_manager_test.go

@@ -17,13 +17,20 @@
 package meta
 
 import (
+	"encoding/json"
 	"testing"
 
 	"github.com/cockroachdb/errors"
 	"github.com/samber/lo"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
+	"go.uber.org/zap"
 
+	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
+	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/pkg/log"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -317,3 +324,74 @@ func (suite *LeaderViewManagerSuite) TestNotifyDelegatorChanges() {
 func TestLeaderViewManager(t *testing.T) {
 	suite.Run(t, new(LeaderViewManagerSuite))
 }
+
+func TestGetLeaderView(t *testing.T) {
+	manager := NewLeaderViewManager()
+	leaderView1 := &LeaderView{
+		ID:           1,
+		CollectionID: 100,
+		Channel:      "channel-1",
+		Version:      1,
+		Segments:     map[int64]*querypb.SegmentDist{1: {NodeID: 1}},
+		GrowingSegments: map[int64]*Segment{
+			1: {SegmentInfo: &datapb.SegmentInfo{ID: 1, CollectionID: 100, PartitionID: 10, InsertChannel: "channel-1", NumOfRows: 1000, State: commonpb.SegmentState_Growing}, Node: 1},
+		},
+		TargetVersion:      1,
+		NumOfGrowingRows:   1000,
+		UnServiceableError: nil,
+	}
+
+	leaderView2 := &LeaderView{
+		ID:           2,
+		CollectionID: 200,
+		Channel:      "channel-2",
+		Version:      1,
+		Segments:     map[int64]*querypb.SegmentDist{2: {NodeID: 2}},
+		GrowingSegments: map[int64]*Segment{
+			2: {SegmentInfo: &datapb.SegmentInfo{ID: 2, CollectionID: 200, PartitionID: 20, InsertChannel: "channel-2", NumOfRows: 2000, State: commonpb.SegmentState_Growing}, Node: 2},
+		},
+		TargetVersion:      1,
+		NumOfGrowingRows:   2000,
+		UnServiceableError: nil,
+	}
+
+	manager.Update(1, leaderView1)
+	manager.Update(2, leaderView2)
+
+	// Call GetLeaderView
+	leaderViews := manager.GetLeaderView()
+	jsonOutput, err := json.Marshal(leaderViews)
+	assert.NoError(t, err)
+
+	var result []*metricsinfo.LeaderView
+	err = json.Unmarshal(jsonOutput, &result)
+	assert.NoError(t, err)
+	assert.Len(t, result, 2)
+
+	log.Info("====", zap.Any("result", result))
+	checkResult := func(lv *metricsinfo.LeaderView) {
+		if lv.LeaderID == 1 {
+			assert.Equal(t, int64(100), lv.CollectionID)
+			assert.Equal(t, "channel-1", lv.Channel)
+			assert.Equal(t, int64(1), lv.Version)
+			assert.Len(t, lv.SealedSegments, 1)
+			assert.Len(t, lv.GrowingSegments, 1)
+			assert.Equal(t, int64(1), lv.SealedSegments[0].SegmentID)
+			assert.Equal(t, int64(1), lv.GrowingSegments[0].SegmentID)
+		} else if lv.LeaderID == 2 {
+			assert.Equal(t, int64(200), lv.CollectionID)
+			assert.Equal(t, "channel-2", lv.Channel)
+			assert.Equal(t, int64(1), lv.Version)
+			assert.Len(t, lv.SealedSegments, 1)
+			assert.Len(t, lv.GrowingSegments, 1)
+			assert.Equal(t, int64(2), lv.SealedSegments[0].SegmentID)
+			assert.Equal(t, int64(2), lv.GrowingSegments[0].SegmentID)
+		} else {
+			assert.Failf(t, "unexpected leader id", "unexpected leader id %d", lv.LeaderID)
+		}
+	}
+
+	for _, lv := range result {
+		checkResult(lv)
+	}
+}

internal/querycoordv2/meta/mock_target_manager.go

@@ -565,6 +565,52 @@ func (_c *MockTargetManager_GetSealedSegmentsByPartition_Call) RunAndReturn(run
 	return _c
 }
 
+// GetTargetJSON provides a mock function with given fields: scope
+func (_m *MockTargetManager) GetTargetJSON(scope int32) string {
+	ret := _m.Called(scope)
+
+	if len(ret) == 0 {
+		panic("no return value specified for GetTargetJSON")
+	}
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func(int32) string); ok {
+		r0 = rf(scope)
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	return r0
+}
+
+// MockTargetManager_GetTargetJSON_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetTargetJSON'
+type MockTargetManager_GetTargetJSON_Call struct {
+	*mock.Call
+}
+
+// GetTargetJSON is a helper method to define mock.On call
+//   - scope int32
+func (_e *MockTargetManager_Expecter) GetTargetJSON(scope interface{}) *MockTargetManager_GetTargetJSON_Call {
+	return &MockTargetManager_GetTargetJSON_Call{Call: _e.mock.On("GetTargetJSON", scope)}
+}
+
+func (_c *MockTargetManager_GetTargetJSON_Call) Run(run func(scope int32)) *MockTargetManager_GetTargetJSON_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(int32))
+	})
+	return _c
+}
+
+func (_c *MockTargetManager_GetTargetJSON_Call) Return(_a0 string) *MockTargetManager_GetTargetJSON_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+func (_c *MockTargetManager_GetTargetJSON_Call) RunAndReturn(run func(int32) string) *MockTargetManager_GetTargetJSON_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
 // IsCurrentTargetExist provides a mock function with given fields: collectionID, partitionID
 func (_m *MockTargetManager) IsCurrentTargetExist(collectionID int64, partitionID int64) bool {
 	ret := _m.Called(collectionID, partitionID)

internal/querycoordv2/meta/replica_manager.go

@@ -17,6 +17,7 @@
 package meta
 
 import (
+	"encoding/json"
 	"fmt"
 	"sync"
 
@@ -28,6 +29,7 @@ import (
 	"github.com/milvus-io/milvus/internal/proto/querypb"
 	"github.com/milvus-io/milvus/pkg/log"
 	"github.com/milvus-io/milvus/pkg/util/merr"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
@@ -466,3 +468,33 @@ func (m *ReplicaManager) GetResourceGroupByCollection(collection typeutil.Unique
 	ret := typeutil.NewSet(lo.Map(replicas, func(r *Replica, _ int) string { return r.GetResourceGroup() })...)
 	return ret
 }
+
+// GetReplicasJSON returns a JSON representation of all replicas managed by the ReplicaManager.
+// It locks the ReplicaManager for reading, converts the replicas to their protobuf representation,
+// marshals them into a JSON string, and returns the result.
+// If an error occurs during marshaling, it logs a warning and returns an empty string.
+func (m *ReplicaManager) GetReplicasJSON() string {
+	m.rwmutex.RLock()
+	defer m.rwmutex.RUnlock()
+
+	replicas := lo.MapToSlice(m.replicas, func(i typeutil.UniqueID, r *Replica) *metricsinfo.Replica {
+		channelTowRWNodes := make(map[string][]int64)
+		for k, v := range r.replicaPB.GetChannelNodeInfos() {
+			channelTowRWNodes[k] = v.GetRwNodes()
+		}
+		return &metricsinfo.Replica{
+			ID:               r.GetID(),
+			CollectionID:     r.GetCollectionID(),
+			RWNodes:          r.GetNodes(),
+			ResourceGroup:    r.GetResourceGroup(),
+			RONodes:          r.GetRONodes(),
+			ChannelToRWNodes: channelTowRWNodes,
+		}
+	})
+	ret, err := json.Marshal(replicas)
+	if err != nil {
+		log.Warn("failed to marshal replicas", zap.Error(err))
+		return ""
+	}
+	return string(ret)
+}

internal/querycoordv2/meta/replica_manager_test.go

@@ -17,9 +17,12 @@
 package meta
 
 import (
+	"encoding/json"
 	"testing"
 
 	"github.com/samber/lo"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/suite"
 	"google.golang.org/protobuf/proto"
 
@@ -27,10 +30,12 @@ import (
 	etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
 	"github.com/milvus-io/milvus/internal/metastore"
 	"github.com/milvus-io/milvus/internal/metastore/kv/querycoord"
+	"github.com/milvus-io/milvus/internal/metastore/mocks"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
 	. "github.com/milvus-io/milvus/internal/querycoordv2/params"
 	"github.com/milvus-io/milvus/pkg/kv"
 	"github.com/milvus-io/milvus/pkg/util/etcd"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
@@ -494,3 +499,54 @@ func TestReplicaManager(t *testing.T) {
 	suite.Run(t, new(ReplicaManagerSuite))
 	suite.Run(t, new(ReplicaManagerV2Suite))
 }
+
+func TestGetReplicasJSON(t *testing.T) {
+	catalog := mocks.NewQueryCoordCatalog(t)
+	catalog.EXPECT().SaveReplica(mock.Anything).Return(nil)
+	idAllocator := RandomIncrementIDAllocator()
+	replicaManager := NewReplicaManager(idAllocator, catalog)
+
+	// Add some replicas to the ReplicaManager
+	replica1 := newReplica(&querypb.Replica{
+		ID:            1,
+		CollectionID:  100,
+		ResourceGroup: "rg1",
+		Nodes:         []int64{1, 2, 3},
+	})
+	replica2 := newReplica(&querypb.Replica{
+		ID:            2,
+		CollectionID:  200,
+		ResourceGroup: "rg2",
+		Nodes:         []int64{4, 5, 6},
+	})
+
+	err := replicaManager.put(replica1)
+	assert.NoError(t, err)
+
+	err = replicaManager.put(replica2)
+	assert.NoError(t, err)
+
+	jsonOutput := replicaManager.GetReplicasJSON()
+	var replicas []*metricsinfo.Replica
+	err = json.Unmarshal([]byte(jsonOutput), &replicas)
+	assert.NoError(t, err)
+	assert.Len(t, replicas, 2)
+
+	checkResult := func(replica *metricsinfo.Replica) {
+		if replica.ID == 1 {
+			assert.Equal(t, int64(100), replica.CollectionID)
+			assert.Equal(t, "rg1", replica.ResourceGroup)
+			assert.ElementsMatch(t, []int64{1, 2, 3}, replica.RWNodes)
+		} else if replica.ID == 2 {
+			assert.Equal(t, int64(200), replica.CollectionID)
+			assert.Equal(t, "rg2", replica.ResourceGroup)
+			assert.ElementsMatch(t, []int64{4, 5, 6}, replica.RWNodes)
+		} else {
+			assert.Failf(t, "unexpected replica id", "unexpected replica id %d", replica.ID)
+		}
+	}
+
+	for _, replica := range replicas {
+		checkResult(replica)
+	}
+}

internal/querycoordv2/meta/resource_manager.go

@@ -17,6 +17,7 @@
 package meta
 
 import (
+	"encoding/json"
 	"fmt"
 	"sync"
 
@@ -31,6 +32,7 @@ import (
 	"github.com/milvus-io/milvus/internal/querycoordv2/session"
 	"github.com/milvus-io/milvus/pkg/log"
 	"github.com/milvus-io/milvus/pkg/util/merr"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/syncutil"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
@@ -918,3 +920,23 @@ func (rm *ResourceManager) validateResourceGroupIsDeletable(rgName string) error
 	}
 	return nil
 }
+
+func (rm *ResourceManager) GetResourceGroupsJSON() string {
+	rm.rwmutex.RLock()
+	defer rm.rwmutex.RUnlock()
+
+	rgs := lo.MapToSlice(rm.groups, func(i string, r *ResourceGroup) *metricsinfo.ResourceGroup {
+		return &metricsinfo.ResourceGroup{
+			Name:  r.GetName(),
+			Nodes: r.GetNodes(),
+			Cfg:   r.GetConfig(),
+		}
+	})
+	ret, err := json.Marshal(rgs)
+	if err != nil {
+		log.Error("failed to marshal resource groups", zap.Error(err))
+		return ""
+	}
+
+	return string(ret)
+}

internal/querycoordv2/meta/resource_manager_test.go

@@ -16,8 +16,10 @@
 package meta
 
 import (
+	"encoding/json"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/suite"
 
@@ -30,7 +32,9 @@ import (
 	"github.com/milvus-io/milvus/pkg/kv"
 	"github.com/milvus-io/milvus/pkg/util/etcd"
 	"github.com/milvus-io/milvus/pkg/util/merr"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
+	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
 type ResourceManagerSuite struct {
@@ -619,3 +623,33 @@ func (suite *ResourceManagerSuite) TestUnassignFail() {
 		suite.manager.HandleNodeDown(1)
 	})
 }
+
+func TestGetResourceGroupsJSON(t *testing.T) {
+	manager := &ResourceManager{groups: make(map[string]*ResourceGroup)}
+	rg1 := NewResourceGroup("rg1", newResourceGroupConfig(0, 10))
+	rg1.nodes = typeutil.NewUniqueSet(1, 2)
+	rg2 := NewResourceGroup("rg2", newResourceGroupConfig(0, 20))
+	rg2.nodes = typeutil.NewUniqueSet(3, 4)
+	manager.groups["rg1"] = rg1
+	manager.groups["rg2"] = rg2
+
+	jsonOutput := manager.GetResourceGroupsJSON()
+	var resourceGroups []*metricsinfo.ResourceGroup
+	err := json.Unmarshal([]byte(jsonOutput), &resourceGroups)
+	assert.NoError(t, err)
+	assert.Len(t, resourceGroups, 2)
+
+	checkResult := func(rg *metricsinfo.ResourceGroup) {
+		if rg.Name == "rg1" {
+			assert.ElementsMatch(t, []int64{1, 2}, rg.Nodes)
+		} else if rg.Name == "rg2" {
+			assert.ElementsMatch(t, []int64{3, 4}, rg.Nodes)
+		} else {
+			assert.Failf(t, "unexpected resource group name", "unexpected resource group name %s", rg.Name)
+		}
+	}
+
+	for _, rg := range resourceGroups {
+		checkResult(rg)
+	}
+}

internal/querycoordv2/meta/segment_dist_manager.go

@@ -24,6 +24,8 @@ import (
 
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/internal/util/metrics"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -130,6 +132,21 @@ func SegmentFromInfo(info *datapb.SegmentInfo) *Segment {
 	}
 }
 
+func newSegmentMetricsFrom(segment *Segment) *metricsinfo.Segment {
+	convertedSegment := metrics.NewSegmentFrom(segment.SegmentInfo)
+	convertedSegment.NodeID = segment.Node
+	convertedSegment.LoadedTimestamp = segment.Version
+	convertedSegment.Index = lo.Map(lo.Values(segment.IndexInfo), func(e *querypb.FieldIndexInfo, i int) *metricsinfo.SegmentIndex {
+		return &metricsinfo.SegmentIndex{
+			IndexFieldID: e.FieldID,
+			IndexID:      e.IndexID,
+			BuildID:      e.BuildID,
+			IndexSize:    e.IndexSize,
+		}
+	})
+	return convertedSegment
+}
+
 func (segment *Segment) Clone() *Segment {
 	return &Segment{
 		SegmentInfo: proto.Clone(segment.SegmentInfo).(*datapb.SegmentInfo),
@@ -227,3 +244,17 @@ func (m *SegmentDistManager) GetByFilter(filters ...SegmentDistFilter) []*Segmen
 	}
 	return ret
 }
+
+func (m *SegmentDistManager) GetSegmentDist() []*metricsinfo.Segment {
+	m.rwmutex.RLock()
+	defer m.rwmutex.RUnlock()
+
+	var segments []*metricsinfo.Segment
+	for _, nodeSeg := range m.segments {
+		for _, segment := range nodeSeg.segments {
+			segments = append(segments, newSegmentMetricsFrom(segment))
+		}
+	}
+
+	return segments
+}

internal/querycoordv2/meta/segment_dist_manager_test.go

@@ -19,10 +19,13 @@ package meta
 import (
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
 
+	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 )
 
 type SegmentDistManagerSuite struct {
@@ -188,3 +191,63 @@ func (suite *SegmentDistManagerSuite) AssertShard(segments []*Segment, shard str
 func TestSegmentDistManager(t *testing.T) {
 	suite.Run(t, new(SegmentDistManagerSuite))
 }
+
+func TestGetSegmentDistJSON(t *testing.T) {
+	// Initialize SegmentDistManager
+	manager := NewSegmentDistManager()
+
+	// Add some segments to the SegmentDistManager
+	segment1 := SegmentFromInfo(&datapb.SegmentInfo{
+		ID:            1,
+		CollectionID:  100,
+		PartitionID:   10,
+		InsertChannel: "channel-1",
+		NumOfRows:     1000,
+		State:         commonpb.SegmentState_Flushed,
+	})
+	segment1.Node = 1
+	segment1.Version = 1
+
+	segment2 := SegmentFromInfo(&datapb.SegmentInfo{
+		ID:            2,
+		CollectionID:  200,
+		PartitionID:   20,
+		InsertChannel: "channel-2",
+		NumOfRows:     2000,
+		State:         commonpb.SegmentState_Flushed,
+	})
+	segment2.Node = 2
+	segment2.Version = 1
+
+	manager.Update(1, segment1)
+	manager.Update(2, segment2)
+
+	segments := manager.GetSegmentDist()
+	assert.Equal(t, 2, len(segments))
+
+	checkResults := func(s *metricsinfo.Segment) {
+		if s.SegmentID == 1 {
+			assert.Equal(t, int64(100), s.CollectionID)
+			assert.Equal(t, int64(10), s.PartitionID)
+			assert.Equal(t, "channel-1", s.Channel)
+			assert.Equal(t, int64(1000), s.NumOfRows)
+			assert.Equal(t, "Flushed", s.State)
+			assert.Equal(t, int64(1), s.NodeID)
+			assert.Equal(t, int64(1), s.LoadedTimestamp)
+		} else if s.SegmentID == 2 {
+			assert.Equal(t, int64(200), s.CollectionID)
+			assert.Equal(t, int64(20), s.PartitionID)
+			assert.Equal(t, "channel-2", s.Channel)
+			assert.Equal(t, int64(2000), s.NumOfRows)
+			assert.Equal(t, "Flushed", s.State)
+			assert.Equal(t, int64(2), s.NodeID)
+			assert.Equal(t, int64(1), s.LoadedTimestamp)
+		} else {
+			assert.Failf(t, "unexpected segment id", "unexpected segment id %d", s.SegmentID)
+		}
+	}
+
+	for _, s := range segments {
+		checkResults(s)
+	}
+}

internal/querycoordv2/meta/target.go

@@ -23,6 +23,8 @@ import (
 
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/internal/util/metrics"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -183,3 +185,21 @@ func (t *target) removeCollectionTarget(collectionID int64) {
 func (t *target) getCollectionTarget(collectionID int64) *CollectionTarget {
 	return t.collectionTargetMap[collectionID]
 }
+
+func (t *target) toQueryCoordCollectionTargets() []*metricsinfo.QueryCoordTarget {
+	return lo.MapToSlice(t.collectionTargetMap, func(k int64, v *CollectionTarget) *metricsinfo.QueryCoordTarget {
+		segments := lo.MapToSlice(v.GetAllSegments(), func(k int64, s *datapb.SegmentInfo) *metricsinfo.Segment {
+			return metrics.NewSegmentFrom(s)
+		})
+
+		dmChannels := lo.MapToSlice(v.GetAllDmChannels(), func(k string, ch *DmChannel) *metricsinfo.DmChannel {
+			return metrics.NewDMChannelFrom(ch.VchannelInfo)
+		})
+
+		return &metricsinfo.QueryCoordTarget{
+			CollectionID: k,
+			Segments:     segments,
+			DMChannels:   dmChannels,
+		}
+	})
+}

internal/querycoordv2/meta/target_manager.go

@@ -18,6 +18,7 @@ package meta
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"runtime"
 	"sync"
@@ -68,6 +69,7 @@ type TargetManagerInterface interface {
 	SaveCurrentTarget(catalog metastore.QueryCoordCatalog)
 	Recover(catalog metastore.QueryCoordCatalog) error
 	CanSegmentBeMoved(collectionID, segmentID int64) bool
+	GetTargetJSON(scope TargetScope) string
 }
 
 type TargetManager struct {
@@ -632,3 +634,28 @@ func (mgr *TargetManager) CanSegmentBeMoved(collectionID, segmentID int64) bool
 
 	return false
 }
+
+func (mgr *TargetManager) GetTargetJSON(scope TargetScope) string {
+	mgr.rwMutex.RLock()
+	defer mgr.rwMutex.RUnlock()
+
+	ret := mgr.getTarget(scope)
+	if ret == nil {
+		return ""
+	}
+
+	v, err := json.Marshal(ret.toQueryCoordCollectionTargets())
+	if err != nil {
+		log.Warn("failed to marshal target", zap.Error(err))
+		return ""
+	}
+	return string(v)
+}
+
+func (mgr *TargetManager) getTarget(scope TargetScope) *target {
+	if scope == CurrentTarget {
+		return mgr.current
+	}
+
+	return mgr.next
+}

internal/querycoordv2/meta/target_manager_test.go

@@ -17,11 +17,13 @@
 package meta
 
 import (
+	"encoding/json"
 	"testing"
 	"time"
 
 	"github.com/cockroachdb/errors"
 	"github.com/samber/lo"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/suite"
 
@@ -34,6 +36,7 @@ import (
 	"github.com/milvus-io/milvus/internal/querycoordv2/session"
 	"github.com/milvus-io/milvus/pkg/kv"
 	"github.com/milvus-io/milvus/pkg/util/etcd"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
@@ -602,6 +605,64 @@ func (suite *TargetManagerSuite) TestRecover() {
 	suite.Len(targets, 0)
 }
 
+func (suite *TargetManagerSuite) TestGetTargetJSON() {
+	collectionID := int64(1003)
+	suite.meta.PutCollection(&Collection{
+		CollectionLoadInfo: &querypb.CollectionLoadInfo{
+			CollectionID:  collectionID,
+			ReplicaNumber: 1,
+		},
+	})
+	suite.meta.PutPartition(&Partition{
+		PartitionLoadInfo: &querypb.PartitionLoadInfo{
+			CollectionID: collectionID,
+			PartitionID:  1,
+		},
+	})
+
+	nextTargetChannels := []*datapb.VchannelInfo{
+		{
+			CollectionID:        collectionID,
+			ChannelName:         "channel-1",
+			UnflushedSegmentIds: []int64{1, 2, 3, 4},
+			DroppedSegmentIds:   []int64{11, 22, 33},
+		},
+		{
+			CollectionID:        collectionID,
+			ChannelName:         "channel-2",
+			UnflushedSegmentIds: []int64{5},
+		},
+	}
+
+	nextTargetSegments := []*datapb.SegmentInfo{
+		{
+			ID:            11,
+			PartitionID:   1,
+			InsertChannel: "channel-1",
+		},
+		{
+			ID:            12,
+			PartitionID:   1,
+			InsertChannel: "channel-2",
+		},
+	}
+
+	suite.broker.EXPECT().GetRecoveryInfoV2(mock.Anything, collectionID).Return(nextTargetChannels, nextTargetSegments, nil)
+	suite.NoError(suite.mgr.UpdateCollectionNextTarget(collectionID))
+	suite.True(suite.mgr.UpdateCollectionCurrentTarget(collectionID))
+
+	jsonStr := suite.mgr.GetTargetJSON(CurrentTarget)
+	assert.NotEmpty(suite.T(), jsonStr)
+
+	var currentTarget []*metricsinfo.QueryCoordTarget
+	err := json.Unmarshal([]byte(jsonStr), &currentTarget)
+	suite.NoError(err)
+	assert.Len(suite.T(), currentTarget, 1)
+	assert.Equal(suite.T(), collectionID, currentTarget[0].CollectionID)
+	assert.Len(suite.T(), currentTarget[0].DMChannels, 2)
+	assert.Len(suite.T(), currentTarget[0].Segments, 2)
+}
+
 func TestTargetManager(t *testing.T) {
 	suite.Run(t, new(TargetManagerSuite))
 }

internal/querycoordv2/server.go

@@ -199,8 +199,41 @@ func (s *Server) registerMetricsRequest() {
 		return s.taskScheduler.GetTasksJSON(), nil
 	}
 
+	QueryDistAction := func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+		return s.targetMgr.GetTargetJSON(meta.CurrentTarget), nil
+	}
+
+	QueryTargetAction := func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+		return s.dist.GetDistributionJSON(), nil
+	}
+
+	QueryReplicasAction := func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+		return s.meta.GetReplicasJSON(), nil
+	}
+
+	QueryResourceGroupsAction := func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+		return s.meta.GetResourceGroupsJSON(), nil
+	}
+
+	QuerySegmentsAction := func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+		return s.getSegmentsFromQueryNode(ctx, req)
+	}
+
+	QueryChannelsAction := func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+		return s.getChannelsFromQueryNode(ctx, req)
+	}
+
+	// register actions that requests are processed in querycoord
 	s.metricsRequest.RegisterMetricsRequest(metricsinfo.SystemInfoMetrics, getSystemInfoAction)
 	s.metricsRequest.RegisterMetricsRequest(metricsinfo.QueryCoordAllTasks, QueryTasksAction)
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.QueryDist, QueryDistAction)
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.QueryTarget, QueryTargetAction)
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.QueryReplicas, QueryReplicasAction)
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.QueryResourceGroups, QueryResourceGroupsAction)
+
+	// register actions that requests are processed in querynode
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.QuerySegments, QuerySegmentsAction)
+	s.metricsRequest.RegisterMetricsRequest(metricsinfo.QueryChannels, QueryChannelsAction)
 	log.Info("register metrics actions finished")
 }
 

internal/querynodev2/metrics_info.go

@@ -18,14 +18,17 @@ package querynodev2
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 
 	"github.com/samber/lo"
+	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
 	"github.com/milvus-io/milvus/internal/querynodev2/collector"
 	"github.com/milvus-io/milvus/internal/querynodev2/delegator"
 	"github.com/milvus-io/milvus/internal/querynodev2/segments"
+	"github.com/milvus-io/milvus/pkg/log"
 	"github.com/milvus-io/milvus/pkg/metrics"
 	"github.com/milvus-io/milvus/pkg/util/hardware"
 	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
@@ -170,6 +173,54 @@ func getCollectionMetrics(node *QueryNode) (*metricsinfo.QueryNodeCollectionMetr
 	return ret, nil
 }
 
+// getChannelJSON returns the JSON string of channels
+func getChannelJSON(node *QueryNode) string {
+	stats := node.pipelineManager.GetChannelStats()
+	ret, err := json.Marshal(stats)
+	if err != nil {
+		log.Warn("failed to marshal channels", zap.Error(err))
+		return ""
+	}
+	return string(ret)
+}
+
+// getSegmentJSON returns the JSON string of segments
+func getSegmentJSON(node *QueryNode) string {
+	allSegments := node.manager.Segment.GetBy()
+	var ms []*metricsinfo.Segment
+	for _, s := range allSegments {
+		indexes := make([]*metricsinfo.SegmentIndex, 0, len(s.Indexes()))
+		for _, index := range s.Indexes() {
+			indexes = append(indexes, &metricsinfo.SegmentIndex{
+				IndexFieldID: index.IndexInfo.FieldID,
+				IndexID:      index.IndexInfo.IndexID,
+				IndexSize:    index.IndexInfo.IndexSize,
+				BuildID:      index.IndexInfo.BuildID,
+				IsLoaded:     index.IsLoaded,
+			})
+		}
+
+		ms = append(ms, &metricsinfo.Segment{
+			SegmentID:            s.ID(),
+			CollectionID:         s.Collection(),
+			PartitionID:          s.Partition(),
+			MemSize:              s.MemSize(),
+			Index:                indexes,
+			State:                s.Type().String(),
+			ResourceGroup:        s.ResourceGroup(),
+			LoadedInsertRowCount: s.InsertCount(),
+			NodeID:               node.GetNodeID(),
+		})
+	}
+
+	ret, err := json.Marshal(ms)
+	if err != nil {
+		log.Warn("failed to marshal segments", zap.Error(err))
+		return ""
+	}
+	return string(ret)
+}
+
 // getSystemInfoMetrics returns metrics info of QueryNode
 func getSystemInfoMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest, node *QueryNode) (string, error) {
 	usedMem := hardware.GetUsedMemoryCount()

internal/querynodev2/metrics_info_test.go

@@ -0,0 +1,131 @@
+// Licensed to the LF AI & Data foundation under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package querynodev2
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+
+	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/internal/querynodev2/delegator"
+	"github.com/milvus-io/milvus/internal/querynodev2/pipeline"
+	"github.com/milvus-io/milvus/internal/querynodev2/segments"
+	"github.com/milvus-io/milvus/internal/querynodev2/tsafe"
+	"github.com/milvus-io/milvus/pkg/mq/msgdispatcher"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
+	"github.com/milvus-io/milvus/pkg/util/paramtable"
+	"github.com/milvus-io/milvus/pkg/util/typeutil"
+)
+
+func TestGetPipelineJSON(t *testing.T) {
+	paramtable.Init()
+
+	ch := "ch"
+	tSafeManager := tsafe.NewTSafeReplica()
+	tSafeManager.Add(context.Background(), ch, 0)
+	delegators := typeutil.NewConcurrentMap[string, delegator.ShardDelegator]()
+	d := delegator.NewMockShardDelegator(t)
+	delegators.Insert(ch, d)
+	msgDispatcher := msgdispatcher.NewMockClient(t)
+
+	collectionManager := segments.NewMockCollectionManager(t)
+	segmentManager := segments.NewMockSegmentManager(t)
+	collectionManager.EXPECT().Get(mock.Anything).Return(&segments.Collection{})
+	manager := &segments.Manager{
+		Collection: collectionManager,
+		Segment:    segmentManager,
+	}
+
+	pipelineManager := pipeline.NewManager(manager, tSafeManager, msgDispatcher, delegators)
+
+	_, err := pipelineManager.Add(1, ch)
+	assert.NoError(t, err)
+	assert.Equal(t, 1, pipelineManager.Num())
+
+	stats := pipelineManager.GetChannelStats()
+	expectedStats := []*metricsinfo.Channel{
+		{
+			Name:           ch,
+			WatchState:     "Healthy",
+			LatestTimeTick: typeutil.TimestampToString(0),
+			NodeID:         paramtable.GetNodeID(),
+			CollectionID:   1,
+		},
+	}
+	assert.Equal(t, expectedStats, stats)
+
+	JSONStr := getChannelJSON(&QueryNode{pipelineManager: pipelineManager})
+	assert.NotEmpty(t, JSONStr)
+
+	var actualStats []*metricsinfo.Channel
+	err = json.Unmarshal([]byte(JSONStr), &actualStats)
+	assert.NoError(t, err)
+	assert.Equal(t, expectedStats, actualStats)
+}
+
+func TestGetSegmentJSON(t *testing.T) {
+	segment := segments.NewMockSegment(t)
+	segment.EXPECT().ID().Return(int64(1))
+	segment.EXPECT().Collection().Return(int64(1001))
+	segment.EXPECT().Partition().Return(int64(2001))
+	segment.EXPECT().MemSize().Return(int64(1024))
+	segment.EXPECT().Indexes().Return([]*segments.IndexedFieldInfo{
+		{
+			IndexInfo: &querypb.FieldIndexInfo{
+				FieldID:   1,
+				IndexID:   101,
+				IndexSize: 512,
+				BuildID:   10001,
+			},
+			IsLoaded: true,
+		},
+	})
+	segment.EXPECT().Type().Return(segments.SegmentTypeGrowing)
+	segment.EXPECT().ResourceGroup().Return("default")
+	segment.EXPECT().InsertCount().Return(int64(100))
+
+	node := &QueryNode{}
+	mockedSegmentManager := segments.NewMockSegmentManager(t)
+	mockedSegmentManager.EXPECT().GetBy().Return([]segments.Segment{segment})
+	node.manager = &segments.Manager{Segment: mockedSegmentManager}
+
+	jsonStr := getSegmentJSON(node)
+	assert.NotEmpty(t, jsonStr)
+
+	var segments []*metricsinfo.Segment
+	err := json.Unmarshal([]byte(jsonStr), &segments)
+	assert.NoError(t, err)
+	assert.NotNil(t, segments)
+	assert.Equal(t, 1, len(segments))
+	assert.Equal(t, int64(1), segments[0].SegmentID)
+	assert.Equal(t, int64(1001), segments[0].CollectionID)
+	assert.Equal(t, int64(2001), segments[0].PartitionID)
+	assert.Equal(t, int64(1024), segments[0].MemSize)
+	assert.Equal(t, 1, len(segments[0].Index))
+	assert.Equal(t, int64(1), segments[0].Index[0].IndexFieldID)
+	assert.Equal(t, int64(101), segments[0].Index[0].IndexID)
+	assert.Equal(t, int64(512), segments[0].Index[0].IndexSize)
+	assert.Equal(t, int64(10001), segments[0].Index[0].BuildID)
+	assert.True(t, segments[0].Index[0].IsLoaded)
+	assert.Equal(t, "Growing", segments[0].State)
+	assert.Equal(t, "default", segments[0].ResourceGroup)
+	assert.Equal(t, int64(100), segments[0].LoadedInsertRowCount)
+}

internal/querynodev2/pipeline/manager.go

@@ -27,6 +27,7 @@ import (
 	"github.com/milvus-io/milvus/pkg/metrics"
 	"github.com/milvus-io/milvus/pkg/mq/msgdispatcher"
 	"github.com/milvus-io/milvus/pkg/util/merr"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 	"github.com/milvus-io/milvus/pkg/util/paramtable"
 	"github.com/milvus-io/milvus/pkg/util/timerecord"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
@@ -40,6 +41,7 @@ type Manager interface {
 	Remove(channels ...string)
 	Start(channels ...string) error
 	Close()
+	GetChannelStats() []*metricsinfo.Channel
 }
 
 type manager struct {
@@ -155,6 +157,27 @@ func (m *manager) Close() {
 	}
 }
 
+func (m *manager) GetChannelStats() []*metricsinfo.Channel {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	ret := make([]*metricsinfo.Channel, 0, len(m.channel2Pipeline))
+	for ch, p := range m.channel2Pipeline {
+		tt, err := m.tSafeManager.Get(ch)
+		if err != nil {
+			log.Warn("get tSafe failed", zap.String("channel", ch), zap.Error(err))
+		}
+		ret = append(ret, &metricsinfo.Channel{
+			Name:           ch,
+			WatchState:     p.Status(),
+			LatestTimeTick: typeutil.TimestampToString(tt),
+			NodeID:         paramtable.GetNodeID(),
+			CollectionID:   p.GetCollectionID(),
+		})
+	}
+	return ret
+}
+
 func NewManager(dataManager *DataManager,
 	tSafeManager TSafeManager,
 	dispatcher msgdispatcher.Client,

internal/querynodev2/pipeline/pipeline.go

@@ -26,6 +26,7 @@ import (
 // pipeline used for querynode
 type Pipeline interface {
 	base.StreamPipeline
+	GetCollectionID() UniqueID
 }
 
 type pipeline struct {
@@ -35,6 +36,10 @@ type pipeline struct {
 	embeddingNode embeddingNode
 }
 
+func (p *pipeline) GetCollectionID() UniqueID {
+	return p.collectionID
+}
+
 func (p *pipeline) Close() {
 	p.StreamPipeline.Close()
 }

internal/querynodev2/server.go

@@ -283,6 +283,16 @@ func (node *QueryNode) registerMetricsRequest() {
 		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
 			return getSystemInfoMetrics(ctx, req, node)
 		})
+
+	node.metricsRequest.RegisterMetricsRequest(metricsinfo.QuerySegments,
+		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+			return getSegmentJSON(node), nil
+		})
+
+	node.metricsRequest.RegisterMetricsRequest(metricsinfo.QueryChannels,
+		func(ctx context.Context, req *milvuspb.GetMetricsRequest, jsonReq gjson.Result) (string, error) {
+			return getChannelJSON(node), nil
+		})
 	log.Info("register metrics actions finished")
 }
 

internal/util/flowgraph/flow_graph.go

@@ -20,6 +20,7 @@ import (
 	"context"
 	"fmt"
 	"sync"
+	"time"
 
 	"github.com/cockroachdb/errors"
 	"go.uber.org/atomic"
@@ -123,11 +124,21 @@ func (fg *TimeTickedFlowGraph) Close() {
 	})
 }
 
+// Status returns the status of the pipeline, it will return "Healthy" if the input node
+// has received any msg in the last nodeTtInterval
+func (fg *TimeTickedFlowGraph) Status() string {
+	diff := time.Since(fg.nodeCtxManager.lastAccessTime.Load())
+	if diff > nodeCtxTtInterval {
+		return fmt.Sprintf("input node hasn't received any msg in the last %s", diff.String())
+	}
+	return "Healthy"
+}
+
 // NewTimeTickedFlowGraph create timetick flowgraph
 func NewTimeTickedFlowGraph(ctx context.Context) *TimeTickedFlowGraph {
 	flowGraph := TimeTickedFlowGraph{
 		nodeCtx:         make(map[string]*nodeCtx),
-		nodeCtxManager:  &nodeCtxManager{},
+		nodeCtxManager:  &nodeCtxManager{lastAccessTime: atomic.NewTime(time.Now())},
 		closeWg:         &sync.WaitGroup{},
 		closeGracefully: atomic.NewBool(CloseImmediately),
 	}

internal/util/flowgraph/node.go

@@ -21,6 +21,7 @@ import (
 	"sync"
 	"time"
 
+	"go.uber.org/atomic"
 	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus/pkg/log"
@@ -59,6 +60,8 @@ type nodeCtxManager struct {
 	closeWg      *sync.WaitGroup
 	closeOnce    sync.Once
 	closeCh      chan struct{} // notify nodes to exit
+
+	lastAccessTime *atomic.Time
 }
 
 // NewNodeCtxManager init with the inputNode and fg.closeWg
@@ -67,6 +70,7 @@ func NewNodeCtxManager(nodeCtx *nodeCtx, closeWg *sync.WaitGroup) *nodeCtxManage
 		inputNodeCtx:   nodeCtx,
 		closeWg:        closeWg,
 		closeCh:        make(chan struct{}),
+		lastAccessTime: atomic.NewTime(time.Now()),
 	}
 }
 
@@ -119,6 +123,10 @@ func (nodeCtxManager *nodeCtxManager) workNodeStart() {
 					continue
 				}
 
+				if nodeCtxManager.lastAccessTime != nil {
+					nodeCtxManager.lastAccessTime.Store(time.Now())
+				}
+
 				output = n.Operate(input)
 				curNode.blockMutex.RUnlock()
 				// the output decide whether the node should be closed.

internal/util/flowgraph/node_test.go

@@ -105,11 +105,7 @@ func TestNodeManager_Start(t *testing.T) {
 
 	node0.inputChannel = make(chan []Msg)
 
-	nodeCtxManager := &nodeCtxManager{
+	nodeCtxManager := NewNodeCtxManager(node0, &sync.WaitGroup{})
-		inputNodeCtx: node0,
-		closeWg:      &sync.WaitGroup{},
-	}
-
 	assert.NotPanics(t, func() {
 		nodeCtxManager.Start()
 	})

internal/util/metrics/utils.go

@@ -1,46 +1,34 @@
 package metrics
 
 import (
-	"github.com/samber/lo"
-
 	"github.com/milvus-io/milvus/internal/proto/datapb"
-	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/pkg/util/metricsinfo"
 )
 
-func PruneFieldIndexInfo(f *querypb.FieldIndexInfo) *querypb.FieldIndexInfo {
+func NewSegmentFrom(segment *datapb.SegmentInfo) *metricsinfo.Segment {
-	return &querypb.FieldIndexInfo{
+	return &metricsinfo.Segment{
-		FieldID:   f.FieldID,
+		SegmentID:    segment.GetID(),
-		IndexID:   f.IndexID,
+		CollectionID: segment.GetCollectionID(),
-		BuildID:   f.BuildID,
+		PartitionID:  segment.GetPartitionID(),
-		IndexSize: f.IndexSize,
+		Channel:      segment.GetInsertChannel(),
-		NumRows:   f.NumRows,
+		NumOfRows:    segment.GetNumOfRows(),
+		State:        segment.GetState().String(),
+		IsImporting:  segment.GetIsImporting(),
+		Compacted:    segment.GetCompacted(),
+		Level:        segment.GetLevel().String(),
+		IsSorted:     segment.GetIsSorted(),
+		IsInvisible:  segment.GetIsInvisible(),
 	}
 }
 
-func PruneSegmentInfo(s *datapb.SegmentInfo) *datapb.SegmentInfo {
+func NewDMChannelFrom(channel *datapb.VchannelInfo) *metricsinfo.DmChannel {
-	return &datapb.SegmentInfo{
+	return &metricsinfo.DmChannel{
-		ID:        s.ID,
+		CollectionID:           channel.GetCollectionID(),
-		NumOfRows: s.NumOfRows,
+		ChannelName:            channel.GetChannelName(),
-		State:     s.State,
+		UnflushedSegmentIds:    channel.GetUnflushedSegmentIds(),
-		Compacted: s.Compacted,
+		FlushedSegmentIds:      channel.GetFlushedSegmentIds(),
-		Level:     s.Level,
+		DroppedSegmentIds:      channel.GetDroppedSegmentIds(),
-	}
+		LevelZeroSegmentIds:    channel.GetLevelZeroSegmentIds(),
-}
+		PartitionStatsVersions: channel.GetPartitionStatsVersions(),
-
-func PruneVChannelInfo(channel *datapb.VchannelInfo) *datapb.VchannelInfo {
-	return &datapb.VchannelInfo{
-		ChannelName: channel.ChannelName,
-		UnflushedSegments: lo.Map(channel.UnflushedSegments, func(s *datapb.SegmentInfo, i int) *datapb.SegmentInfo {
-			return PruneSegmentInfo(s)
-		}),
-		FlushedSegments: lo.Map(channel.FlushedSegments, func(s *datapb.SegmentInfo, i int) *datapb.SegmentInfo {
-			return PruneSegmentInfo(s)
-		}),
-		DroppedSegments: lo.Map(channel.DroppedSegments, func(s *datapb.SegmentInfo, i int) *datapb.SegmentInfo {
-			return PruneSegmentInfo(s)
-		}),
-		IndexedSegments: lo.Map(channel.IndexedSegments, func(s *datapb.SegmentInfo, i int) *datapb.SegmentInfo {
-			return PruneSegmentInfo(s)
-		}),
 	}
 }

internal/util/pipeline/stream_pipeline.go

@@ -18,9 +18,11 @@ package pipeline
 
 import (
 	"context"
+	"fmt"
 	"sync"
 	"time"
 
+	"go.uber.org/atomic"
 	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus-proto/go-api/v2/msgpb"
@@ -39,6 +41,7 @@ import (
 type StreamPipeline interface {
 	Pipeline
 	ConsumeMsgStream(position *msgpb.MsgPosition) error
+	Status() string
 }
 
 type streamPipeline struct {
@@ -52,6 +55,8 @@ type streamPipeline struct {
 	closeCh   chan struct{} // notify work to exit
 	closeWg   sync.WaitGroup
 	closeOnce sync.Once
+
+	lastAccessTime *atomic.Time
 }
 
 func (p *streamPipeline) work() {
@@ -62,6 +67,7 @@ func (p *streamPipeline) work() {
 			log.Debug("stream pipeline input closed")
 			return
 		case msg := <-p.input:
+			p.lastAccessTime.Store(time.Now())
 			log.RatedDebug(10, "stream pipeline fetch msg", zap.Int("sum", len(msg.Msgs)))
 			p.pipeline.inputChannel <- msg
 			p.pipeline.process()
@@ -69,6 +75,16 @@ func (p *streamPipeline) work() {
 	}
 }
 
+// Status returns the status of the pipeline, it will return "Healthy" if the input node
+// has received any msg in the last nodeTtInterval
+func (p *streamPipeline) Status() string {
+	diff := time.Since(p.lastAccessTime.Load())
+	if diff > p.pipeline.nodeTtInterval {
+		return fmt.Sprintf("input node hasn't received any msg in the last %s", diff.String())
+	}
+	return "Healthy"
+}
+
 func (p *streamPipeline) ConsumeMsgStream(position *msgpb.MsgPosition) error {
 	var err error
 	if position == nil {
@@ -154,6 +170,7 @@ func NewPipelineWithStream(dispatcher msgdispatcher.Client, nodeTtInterval time.
 		vChannel:       vChannel,
 		closeCh:        make(chan struct{}),
 		closeWg:        sync.WaitGroup{},
+		lastAccessTime: atomic.NewTime(time.Now()),
 	}
 
 	return pipeline

pkg/util/metricsinfo/metric_request.go

@@ -45,10 +45,16 @@ const (
 	MetricRequestParamsSeparator = ","
 
 	// QuerySegmentDist request for segment distribution on the query node
-	QuerySegmentDist = "qc_segment_dist"
+	QuerySegments = "qn_segments"
 
 	// QueryChannelDist request for channel distribution on the query node
-	QueryChannelDist = "qc_channel_dist"
+	QueryChannels = "qn_channels"
+
+	// QueryDist request for segment/channel/leader view distribution on querycoord
+	QueryDist = "qc_dist"
+
+	// QueryTarget request for segment/channel target on the querycoord
+	QueryTarget = "qc_target"
 
 	// QueryCoordAllTasks request for get tasks on the querycoord
 	QueryCoordAllTasks = "qc_tasks_all"
@@ -59,8 +65,8 @@ const (
 	// QueryResourceGroups request for get resource groups on the querycoord
 	QueryResourceGroups = "qc_resource_group"
 
-	// DataCoordAllTasks request for get tasks on the datacoord
+	// DataDist request for get segments on the datacoord
-	DataCoordAllTasks = "dc_tasks_all"
+	DataDist = "dc_segments"
 
 	// ImportTasks request for get import tasks from the datacoord
 	ImportTasks = "dc_import_tasks"
@@ -74,6 +80,12 @@ const (
 	// SyncTasks request for get sync tasks from the datanode
 	SyncTasks = "dn_sync_tasks"
 
+	// DataSegments request for get segments from the datanode
+	DataSegments = "dn_segments"
+
+	// DataChannels request for get channels from the datanode
+	DataChannels = "dn_channels"
+
 	// MetricRequestParamVerboseKey as a request parameter decide to whether return verbose value
 	MetricRequestParamVerboseKey = "verbose"
 )

pkg/util/metricsinfo/metrics_info.go

@@ -13,8 +13,8 @@ package metricsinfo
 
 import (
 	"encoding/json"
-	"time"
 
+	"github.com/milvus-io/milvus-proto/go-api/v2/rgpb"
 	"github.com/milvus-io/milvus/pkg/util/typeutil"
 )
 
@@ -70,6 +70,105 @@ const (
 	MilvusUsedGoVersion = "MILVUS_USED_GO_VERSION"
 )
 
+type DmChannel struct {
+	NodeID                 int64           `json:"node_id,omitempty"`
+	Version                int64           `json:"version,omitempty"`
+	CollectionID           int64           `json:"collection_id,omitempty"`
+	ChannelName            string          `json:"channel_name,omitempty"`
+	UnflushedSegmentIds    []int64         `json:"unflushed_segment_ids,omitempty"`
+	FlushedSegmentIds      []int64         `json:"flushed_segment_ids,omitempty"`
+	DroppedSegmentIds      []int64         `json:"dropped_segment_ids,omitempty"`
+	LevelZeroSegmentIds    []int64         `json:"level_zero_segment_ids,omitempty"`
+	PartitionStatsVersions map[int64]int64 `json:"partition_stats_versions,omitempty"`
+	WatchState             string          `json:"watch_state,omitempty"`
+	StartWatchTS           int64           `json:"start_watch_ts,omitempty"`
+}
+
+type Segment struct {
+	SegmentID    int64  `json:"segment_id,omitempty"`
+	CollectionID int64  `json:"collection_id,omitempty"`
+	PartitionID  int64  `json:"partition_id,omitempty"`
+	Channel      string `json:"channel,omitempty"`
+	NumOfRows    int64  `json:"num_of_rows,omitempty"`
+	State        string `json:"state,omitempty"`
+	IsImporting  bool   `json:"is_importing,omitempty"`
+	Compacted    bool   `json:"compacted,omitempty"`
+	Level        string `json:"level,omitempty"`
+	IsSorted     bool   `json:"is_sorted,omitempty"`
+	NodeID       int64  `json:"node_id,omitempty"`
+
+	// load related
+	IsInvisible          bool            `json:"is_invisible,omitempty"`
+	LoadedTimestamp      int64           `json:"loaded_timestamp,omitempty"`
+	Index                []*SegmentIndex `json:"index,omitempty"`
+	ResourceGroup        string          `json:"resource_group,omitempty"`
+	LoadedInsertRowCount int64           `json:"loaded_insert_row_count,omitempty"` // inert row count for growing segment that excludes the deleted row count in QueryNode
+	MemSize              int64           `json:"mem_size,omitempty"`                // memory size of segment in QueryNode
+
+	// flush related
+	FlushedRows    int64 `json:"flushed_rows,omitempty"`
+	SyncBufferRows int64 `json:"sync_buffer_rows,omitempty"`
+	SyncingRows    int64 `json:"syncing_rows,omitempty"`
+	// TODO add checkpoints
+}
+
+type SegmentIndex struct {
+	IndexFieldID int64 `json:"field_id,omitempty"`
+	IndexID      int64 `json:"index_id,omitempty"`
+	BuildID      int64 `json:"build_id,omitempty"`
+	IndexSize    int64 `json:"index_size,omitempty"`
+	IsLoaded     bool  `json:"is_loaded,omitempty"`
+}
+
+type QueryCoordTarget struct {
+	CollectionID int64        `json:"collection_id,omitempty"`
+	Segments     []*Segment   `json:"segments,omitempty"`
+	DMChannels   []*DmChannel `json:"dm_channels,omitempty"`
+}
+
+type LeaderView struct {
+	LeaderID           int64      `json:"leader_id"`
+	CollectionID       int64      `json:"collection_id"`
+	Channel            string     `json:"channel"`
+	Version            int64      `json:"version"`
+	SealedSegments     []*Segment `json:"sealed_segments"`
+	GrowingSegments    []*Segment `json:"growing_segments"`
+	TargetVersion      int64      `json:"target_version"`
+	NumOfGrowingRows   int64      `json:"num_of_growing_rows"`
+	UnServiceableError string     `json:"unserviceable_error"`
+}
+
+type QueryCoordDist struct {
+	Segments    []*Segment    `json:"segments,omitempty"`
+	DMChannels  []*DmChannel  `json:"dm_channels,omitempty"`
+	LeaderViews []*LeaderView `json:"leader_views,omitempty"`
+}
+
+type ResourceGroup struct {
+	Name  string                    `json:"name,omitempty"`
+	Nodes []int64                   `json:"nodes,omitempty"`
+	Cfg   *rgpb.ResourceGroupConfig `json:"cfg,omitempty"`
+}
+
+type Replica struct {
+	ID               int64              `json:"ID,omitempty"`
+	CollectionID     int64              `json:"collectionID,omitempty"`
+	RWNodes          []int64            `json:"rw_nodes,omitempty"`
+	ResourceGroup    string             `json:"resource_group,omitempty"`
+	RONodes          []int64            `json:"ro_nodes,omitempty"`
+	ChannelToRWNodes map[string][]int64 `json:"channel_to_rw_nodes,omitempty"`
+}
+
+// Channel is a subscribed channel of in querynode or datanode.
+type Channel struct {
+	Name           string `json:"name,omitempty"`
+	WatchState     string `json:"watch_state,omitempty"`
+	LatestTimeTick string `json:"latest_time_tick,omitempty"` // a time string that indicates the latest time tick of the channel is received
+	NodeID         int64  `json:"node_id,omitempty"`
+	CollectionID   int64  `json:"collection_id,omitempty"`
+	CheckpointTS   string `json:"check_point_ts,omitempty"` // a time string, format like "2006-01-02 15:04:05"
+}
+
 // DeployMetrics records the deploy information of nodes.
 type DeployMetrics struct {
 	SystemVersion string `json:"system_version"`
@@ -167,11 +266,12 @@ type SyncTask struct {
 	SegmentID     int64              `json:"segment_id,omitempty"`
 	BatchRows     int64              `json:"batch_rows,omitempty"`
 	SegmentLevel  string             `json:"segment_level,omitempty"`
-	TsFrom        typeutil.Timestamp `json:"ts_from,omitempty"`
+	TSFrom        typeutil.Timestamp `json:"ts_from,omitempty"`
-	TsTo          typeutil.Timestamp `json:"ts_to,omitempty"`
+	TSTo          typeutil.Timestamp `json:"ts_to,omitempty"`
 	DeltaRowCount int64              `json:"delta_row_count,omitempty"`
 	FlushSize     int64              `json:"flush_size,omitempty"`
-	RunningTime   time.Duration      `json:"running_time,omitempty"`
+	RunningTime   string             `json:"running_time,omitempty"`
+	NodeID        int64              `json:"node_id,omitempty"`
 }
 
 // DataNodeInfos implements ComponentInfos
@@ -181,6 +281,11 @@ type DataNodeInfos struct {
 	QuotaMetrics         *DataNodeQuotaMetrics `json:"quota_metrics"`
 }
 
+type DataCoordDist struct {
+	Segments   []*Segment   `json:"segments,omitempty"`
+	DMChannels []*DmChannel `json:"dm_channels,omitempty"`
+}
+
 // DataCoordConfiguration records the configuration of DataCoord.
 type DataCoordConfiguration struct {
 	SegmentMaxSize float64 `json:"segment_max_size"`

pkg/util/metricsinfo/utils.go

@@ -12,7 +12,12 @@
 package metricsinfo
 
 import (
+	"encoding/json"
 	"os"
+
+	"go.uber.org/zap"
+
+	"github.com/milvus-io/milvus/pkg/log"
 )
 
 // FillDeployMetricsWithEnv fill deploy metrics with env.
@@ -23,3 +28,20 @@ func FillDeployMetricsWithEnv(m *DeployMetrics) {
 	m.UsedGoVersion = os.Getenv(MilvusUsedGoVersion)
 	m.BuildTime = os.Getenv(MilvusBuildTimeEnvKey)
 }
+
+func MarshalGetMetricsValues[T any](metrics []T, err error) (string, error) {
+	if err != nil {
+		return "", err
+	}
+
+	if len(metrics) == 0 {
+		return "", nil
+	}
+
+	bs, err := json.Marshal(metrics)
+	if err != nil {
+		log.Warn("marshal metrics value failed", zap.Any("metrics", metrics), zap.String("err", err.Error()))
+		return "", nil
+	}
+	return string(bs), nil
+}

pkg/util/typeutil/time.go

@@ -45,3 +45,8 @@ func ParseTimestamp(data []byte) (time.Time, error) {
 func SubTimeByWallClock(after, before time.Time) time.Duration {
 	return time.Duration(after.UnixNano() - before.UnixNano())
 }
+
+func TimestampToString(ts uint64) string {
+	ut := time.Unix(int64(ts), 0)
+	return ut.Format(time.DateTime)
+}