Support check health for the service level (#19779)

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

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

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/klauspost/compress v1.14.2
 	github.com/lingdor/stackerror v0.0.0-20191119040541-976d8885ed76
 	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d
-	github.com/milvus-io/milvus-proto/go-api v0.0.0-20221014075920-6c03ca8c3749
+	github.com/milvus-io/milvus-proto/go-api v0.0.0-20221017091121-7a703d4485b5
 	github.com/minio/minio-go/v7 v7.0.17
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/panjf2000/ants/v2 v2.4.8

go.sum

@@ -495,6 +495,8 @@ github.com/milvus-io/gorocksdb v0.0.0-20220624081344-8c5f4212846b h1:TfeY0NxYxZz
 github.com/milvus-io/gorocksdb v0.0.0-20220624081344-8c5f4212846b/go.mod h1:iwW+9cWfIzzDseEBCCeDSN5SD16Tidvy8cwQ7ZY8Qj4=
 github.com/milvus-io/milvus-proto/go-api v0.0.0-20221014075920-6c03ca8c3749 h1:IB+Jyx3dVtrMSGYYVlobkSC9Kat+lxd/GM1i0cKIJXA=
 github.com/milvus-io/milvus-proto/go-api v0.0.0-20221014075920-6c03ca8c3749/go.mod h1:148qnlmZ0Fdm1Fq+Mj/OW2uDoEP25g3mjh0vMGtkgmk=
+github.com/milvus-io/milvus-proto/go-api v0.0.0-20221017091121-7a703d4485b5 h1:CDEQi9T8A7YEtQwHXEBXTl/PDXLzzJSRral8TM+1Krk=
+github.com/milvus-io/milvus-proto/go-api v0.0.0-20221017091121-7a703d4485b5/go.mod h1:148qnlmZ0Fdm1Fq+Mj/OW2uDoEP25g3mjh0vMGtkgmk=
 github.com/milvus-io/pulsar-client-go v0.6.8 h1:fZdZH73aPRszu2fazyeeahQEz34tyn1Pt9EkqJmV100=
 github.com/milvus-io/pulsar-client-go v0.6.8/go.mod h1:oFIlYIk23tamkSLttw849qphmMIpHY8ztEBWDWJW+sc=
 github.com/minio/asm2plan9s v0.0.0-20200509001527-cdd76441f9d8 h1:AMFGa4R4MiIpspGNG7Z948v4n35fFGB3RR3G/ry4FWs=

internal/datacoord/mock_test.go

@@ -277,6 +277,10 @@ type mockRootCoordService struct {
 	cnt   int64
 }
 
+func (m *mockRootCoordService) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	panic("implement me")
+}
+
 func (m *mockRootCoordService) CreateAlias(ctx context.Context, req *milvuspb.CreateAliasRequest) (*commonpb.Status, error) {
 	panic("implement me")
 }

internal/datacoord/server_test.go

@@ -25,6 +25,7 @@ import (
 	"os/signal"
 	"path"
 	"strconv"
+	"sync"
 	"syscall"
 	"testing"
 	"time"
@@ -3341,6 +3342,67 @@ func newTestServer2(t *testing.T, receiveCh chan any, opts ...Option) *Server {
 	return svr
 }
 
+func Test_CheckHealth(t *testing.T) {
+	t.Run("not healthy", func(t *testing.T) {
+		ctx := context.Background()
+		s := &Server{session: &sessionutil.Session{ServerID: 1}}
+		s.stateCode.Store(commonpb.StateCode_Abnormal)
+		resp, err := s.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.NotEmpty(t, resp.Reasons)
+	})
+
+	t.Run("data node health check is ok", func(t *testing.T) {
+		svr := &Server{session: &sessionutil.Session{ServerID: 1}}
+		svr.stateCode.Store(commonpb.StateCode_Healthy)
+		healthClient := &mockDataNodeClient{
+			id:    1,
+			state: commonpb.StateCode_Healthy}
+		sm := NewSessionManager()
+		sm.sessions = struct {
+			sync.RWMutex
+			data map[int64]*Session
+		}{data: map[int64]*Session{1: {
+			client: healthClient,
+			clientCreator: func(ctx context.Context, addr string) (types.DataNode, error) {
+				return healthClient, nil
+			},
+		}}}
+
+		svr.sessionManager = sm
+		ctx := context.Background()
+		resp, err := svr.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, true, resp.IsHealthy)
+		assert.Empty(t, resp.Reasons)
+	})
+
+	t.Run("data node health check is fail", func(t *testing.T) {
+		svr := &Server{session: &sessionutil.Session{ServerID: 1}}
+		svr.stateCode.Store(commonpb.StateCode_Healthy)
+		unhealthClient := &mockDataNodeClient{
+			id:    1,
+			state: commonpb.StateCode_Abnormal}
+		sm := NewSessionManager()
+		sm.sessions = struct {
+			sync.RWMutex
+			data map[int64]*Session
+		}{data: map[int64]*Session{1: {
+			client: unhealthClient,
+			clientCreator: func(ctx context.Context, addr string) (types.DataNode, error) {
+				return unhealthClient, nil
+			},
+		}}}
+		svr.sessionManager = sm
+		ctx := context.Background()
+		resp, err := svr.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.NotEmpty(t, resp.Reasons)
+	})
+}
+
 func Test_initServiceDiscovery(t *testing.T) {
 	server := newTestServer2(t, nil)
 	assert.NotNil(t, server)

internal/datacoord/services.go

@@ -21,6 +21,11 @@ import (
 	"fmt"
 	"math/rand"
 	"strconv"
+	"sync"
+
+	"github.com/milvus-io/milvus/internal/util/errorutil"
+
+	"golang.org/x/sync/errgroup"
 
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
@@ -1392,3 +1397,44 @@ func (s *Server) BroadcastAlteredCollection(ctx context.Context,
 		ErrorCode: commonpb.ErrorCode_Success,
 	}, nil
 }
+
+func (s *Server) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if s.isClosed() {
+		reason := errorutil.UnHealthReason("datacoord", s.session.ServerID, "datacoord is closed")
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: []string{reason}}, nil
+	}
+
+	mu := &sync.Mutex{}
+	group, ctx := errgroup.WithContext(ctx)
+	nodes := s.sessionManager.getLiveNodeIDs()
+	errReasons := make([]string, 0, len(nodes))
+
+	for _, nodeID := range nodes {
+		nodeID := nodeID
+		group.Go(func() error {
+			cli, err := s.sessionManager.getClient(ctx, nodeID)
+			if err != nil {
+				mu.Lock()
+				defer mu.Unlock()
+				errReasons = append(errReasons, errorutil.UnHealthReason("datanode", nodeID, err.Error()))
+				return err
+			}
+
+			sta, err := cli.GetComponentStates(ctx)
+			isHealthy, reason := errorutil.UnHealthReasonWithComponentStatesOrErr("datanode", nodeID, sta, err)
+			if !isHealthy {
+				mu.Lock()
+				defer mu.Unlock()
+				errReasons = append(errReasons, reason)
+			}
+			return err
+		})
+	}
+
+	err := group.Wait()
+	if err != nil || len(errReasons) != 0 {
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: errReasons}, nil
+	}
+
+	return &milvuspb.CheckHealthResponse{IsHealthy: true, Reasons: errReasons}, nil
+}

internal/datanode/mock_test.go

@@ -277,6 +277,12 @@ func (ds *DataCoordFactory) BroadcastAlteredCollection(ctx context.Context, req
 	}, nil
 }
 
+func (ds *DataCoordFactory) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
+
 func (ds *DataCoordFactory) GetSegmentInfo(ctx context.Context, req *datapb.GetSegmentInfoRequest) (*datapb.GetSegmentInfoResponse, error) {
 	if ds.GetSegmentInfosError {
 		return nil, errors.New("mock get segment info error")

internal/distributed/datacoord/client/client.go

@@ -643,3 +643,16 @@ func (c *Client) BroadcastAlteredCollection(ctx context.Context, req *milvuspb.A
 	}
 	return ret.(*commonpb.Status), err
 }
+
+func (c *Client) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	ret, err := c.grpcClient.ReCall(ctx, func(client datapb.DataCoordClient) (any, error) {
+		if !funcutil.CheckCtxValid(ctx) {
+			return nil, ctx.Err()
+		}
+		return client.CheckHealth(ctx, req)
+	})
+	if err != nil || ret == nil {
+		return nil, err
+	}
+	return ret.(*milvuspb.CheckHealthResponse), err
+}

internal/distributed/datacoord/client/client_test.go

@@ -150,6 +150,11 @@ func Test_NewClient(t *testing.T) {
 			ret, err := client.BroadcastAlteredCollection(ctx, nil)
 			retCheck(retNotNil, ret, err)
 		}
+
+		{
+			ret, err := client.CheckHealth(ctx, nil)
+			retCheck(retNotNil, ret, err)
+		}
 	}
 
 	client.grpcClient = &mock.GRPCClientBase[datapb.DataCoordClient]{

internal/distributed/datacoord/service.go

@@ -401,3 +401,7 @@ func (s *Server) MarkSegmentsDropped(ctx context.Context, req *datapb.MarkSegmen
 func (s *Server) BroadcastAlteredCollection(ctx context.Context, request *milvuspb.AlterCollectionRequest) (*commonpb.Status, error) {
 	return s.dataCoord.BroadcastAlteredCollection(ctx, request)
 }
+
+func (s *Server) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return s.dataCoord.CheckHealth(ctx, req)
+}

internal/distributed/datacoord/service_test.go

@@ -224,6 +224,12 @@ func (m *MockDataCoord) BroadcastAlteredCollection(ctx context.Context, req *mil
 	return m.broadCastResp, m.err
 }
 
+func (m *MockDataCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 func Test_NewServer(t *testing.T) {
 	ctx := context.Background()
@@ -533,6 +539,13 @@ func Test_NewServer(t *testing.T) {
 		assert.NotNil(t, resp)
 	})
 
+	t.Run("CheckHealth", func(t *testing.T) {
+		server.dataCoord = &MockDataCoord{}
+		ret, err := server.CheckHealth(ctx, nil)
+		assert.Nil(t, err)
+		assert.Equal(t, true, ret.IsHealthy)
+	})
+
 	err := server.Stop()
 	assert.Nil(t, err)
 }

internal/distributed/indexcoord/client/client.go

@@ -270,3 +270,16 @@ func (c *Client) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest
 	}
 	return ret.(*milvuspb.GetMetricsResponse), err
 }
+
+func (c *Client) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	ret, err := c.grpcClient.ReCall(ctx, func(client indexpb.IndexCoordClient) (any, error) {
+		if !funcutil.CheckCtxValid(ctx) {
+			return nil, ctx.Err()
+		}
+		return client.CheckHealth(ctx, req)
+	})
+	if err != nil || ret == nil {
+		return nil, err
+	}
+	return ret.(*milvuspb.CheckHealthResponse), err
+}

internal/distributed/indexcoord/client/client_test.go

@@ -188,6 +188,12 @@ func TestIndexCoordClient(t *testing.T) {
 		assert.Equal(t, typeutil.IndexCoordRole, resp.ComponentName)
 	})
 
+	t.Run("CheckHealth", func(t *testing.T) {
+		req := &milvuspb.CheckHealthRequest{}
+		resp, err := icc.CheckHealth(ctx, req)
+		assert.NoError(t, err)
+		assert.Equal(t, true, resp.IsHealthy)
+	})
 	err = server.Stop()
 	assert.NoError(t, err)
 

internal/distributed/indexcoord/service.go

@@ -290,6 +290,10 @@ func (s *Server) GetMetrics(ctx context.Context, request *milvuspb.GetMetricsReq
 	return s.indexcoord.GetMetrics(ctx, request)
 }
 
+func (s *Server) CheckHealth(ctx context.Context, request *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return s.indexcoord.CheckHealth(ctx, request)
+}
+
 // startGrpcLoop starts the grep loop of IndexCoord component.
 func (s *Server) startGrpcLoop(grpcPort int) {
 

internal/distributed/indexcoord/service_test.go

@@ -157,6 +157,12 @@ func TestIndexCoordinateServer(t *testing.T) {
 		assert.Equal(t, typeutil.IndexCoordRole, resp.ComponentName)
 	})
 
+	t.Run("CheckHealth", func(t *testing.T) {
+		ret, err := server.CheckHealth(ctx, nil)
+		assert.Nil(t, err)
+		assert.Equal(t, true, ret.IsHealthy)
+	})
+
 	err = server.Stop()
 	assert.NoError(t, err)
 }

internal/distributed/proxy/service.go

@@ -882,3 +882,7 @@ func (s *Server) GetVersion(ctx context.Context, request *milvuspb.GetVersionReq
 		Version: buildTags,
 	}, nil
 }
+
+func (s *Server) CheckHealth(ctx context.Context, request *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return s.proxy.CheckHealth(ctx, request)
+}

internal/distributed/proxy/service_test.go

@@ -268,6 +268,12 @@ func (m *MockRootCoord) ListPolicy(ctx context.Context, in *internalpb.ListPolic
 	return nil, nil
 }
 
+func (m *MockRootCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 type MockIndexCoord struct {
 	MockBase
@@ -329,6 +335,10 @@ func (m *MockIndexCoord) GetMetrics(ctx context.Context, req *milvuspb.GetMetric
 	return nil, nil
 }
 
+func (m *MockIndexCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return nil, nil
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 type MockQueryCoord struct {
 	MockBase
@@ -438,6 +448,12 @@ func (m *MockQueryCoord) ShowConfigurations(ctx context.Context, req *internalpb
 	return nil, nil
 }
 
+func (m *MockQueryCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 type MockDataCoord struct {
 	MockBase
@@ -588,6 +604,10 @@ func (m *MockDataCoord) BroadcastAlteredCollection(ctx context.Context, req *mil
 	return nil, nil
 }
 
+func (m *MockDataCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return nil, nil
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 type MockProxy struct {
 	MockBase
@@ -894,6 +914,10 @@ func (m *MockProxy) RefreshPolicyInfoCache(ctx context.Context, req *proxypb.Ref
 	return nil, nil
 }
 
+func (m *MockProxy) CheckHealth(ctx context.Context, request *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return nil, nil
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 type WaitOption struct {
@@ -1314,6 +1338,11 @@ func Test_NewServer(t *testing.T) {
 		assert.Nil(t, err)
 	})
 
+	t.Run("CheckHealth", func(t *testing.T) {
+		_, err := server.CheckHealth(ctx, nil)
+		assert.Nil(t, err)
+	})
+
 	err = server.Stop()
 	assert.Nil(t, err)
 

internal/distributed/querycoord/client/client.go

@@ -337,3 +337,16 @@ func (c *Client) GetShardLeaders(ctx context.Context, req *querypb.GetShardLeade
 	}
 	return ret.(*querypb.GetShardLeadersResponse), err
 }
+
+func (c *Client) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	ret, err := c.grpcClient.ReCall(ctx, func(client querypb.QueryCoordClient) (any, error) {
+		if !funcutil.CheckCtxValid(ctx) {
+			return nil, ctx.Err()
+		}
+		return client.CheckHealth(ctx, req)
+	})
+	if err != nil || ret == nil {
+		return nil, err
+	}
+	return ret.(*milvuspb.CheckHealthResponse), err
+}

internal/distributed/querycoord/client/client_test.go

@@ -114,6 +114,9 @@ func Test_NewClient(t *testing.T) {
 
 		r19, err := client.ShowConfigurations(ctx, nil)
 		retCheck(retNotNil, r19, err)
+
+		r20, err := client.CheckHealth(ctx, nil)
+		retCheck(retNotNil, r20, err)
 	}
 
 	client.grpcClient = &mock.GRPCClientBase[querypb.QueryCoordClient]{

internal/distributed/querycoord/service.go

@@ -406,3 +406,7 @@ func (s *Server) GetReplicas(ctx context.Context, req *milvuspb.GetReplicasReque
 func (s *Server) GetShardLeaders(ctx context.Context, req *querypb.GetShardLeadersRequest) (*querypb.GetShardLeadersResponse, error) {
 	return s.queryCoord.GetShardLeaders(ctx, req)
 }
+
+func (s *Server) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return s.queryCoord.CheckHealth(ctx, req)
+}

internal/distributed/querycoord/service_test.go

@@ -152,6 +152,12 @@ func (m *MockQueryCoord) GetShardLeaders(ctx context.Context, req *querypb.GetSh
 	return m.shardLeadersResp, m.err
 }
 
+func (m *MockQueryCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, m.err
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 type MockRootCoord struct {
 	types.RootCoord
@@ -387,6 +393,12 @@ func Test_NewServer(t *testing.T) {
 		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
 	})
 
+	t.Run("CheckHealth", func(t *testing.T) {
+		ret, err := server.CheckHealth(ctx, nil)
+		assert.Nil(t, err)
+		assert.Equal(t, true, ret.IsHealthy)
+	})
+
 	err = server.Stop()
 	assert.Nil(t, err)
 }

internal/distributed/rootcoord/client/client.go

@@ -665,3 +665,16 @@ func (c *Client) ListPolicy(ctx context.Context, req *internalpb.ListPolicyReque
 	}
 	return ret.(*internalpb.ListPolicyResponse), err
 }
+
+func (c *Client) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	ret, err := c.grpcClient.ReCall(ctx, func(client rootcoordpb.RootCoordClient) (any, error) {
+		if !funcutil.CheckCtxValid(ctx) {
+			return nil, ctx.Err()
+		}
+		return client.CheckHealth(ctx, req)
+	})
+	if err != nil {
+		return nil, err
+	}
+	return ret.(*milvuspb.CheckHealthResponse), err
+}

internal/distributed/rootcoord/client/client_test.go

@@ -213,6 +213,10 @@ func Test_NewClient(t *testing.T) {
 			r, err := client.ShowConfigurations(ctx, nil)
 			retCheck(retNotNil, r, err)
 		}
+		{
+			r, err := client.CheckHealth(ctx, nil)
+			retCheck(retNotNil, r, err)
+		}
 	}
 
 	client.grpcClient = &mock.GRPCClientBase[rootcoordpb.RootCoordClient]{
@@ -411,6 +415,10 @@ func Test_NewClient(t *testing.T) {
 		rTimeout, err := client.ListPolicy(shortCtx, nil)
 		retCheck(rTimeout, err)
 	}
+	{
+		rTimeout, err := client.CheckHealth(shortCtx, nil)
+		retCheck(rTimeout, err)
+	}
 	// clean up
 	err = client.Stop()
 	assert.Nil(t, err)

internal/distributed/rootcoord/service.go

@@ -77,6 +77,10 @@ type Server struct {
 	closer io.Closer
 }
 
+func (s *Server) CheckHealth(ctx context.Context, request *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return s.rootCoord.CheckHealth(ctx, request)
+}
+
 // CreateAlias creates an alias for specified collection.
 func (s *Server) CreateAlias(ctx context.Context, request *milvuspb.CreateAliasRequest) (*commonpb.Status, error) {
 	return s.rootCoord.CreateAlias(ctx, request)

internal/distributed/rootcoord/service_test.go

@@ -52,6 +52,11 @@ type mockCore struct {
 	types.RootCoordComponent
 }
 
+func (m *mockCore) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
 func (m *mockCore) UpdateStateCode(commonpb.StateCode) {
 }
 
@@ -181,6 +186,12 @@ func TestRun(t *testing.T) {
 	err = svr.Run()
 	assert.Nil(t, err)
 
+	t.Run("CheckHealth", func(t *testing.T) {
+		ret, err := svr.CheckHealth(ctx, nil)
+		assert.Nil(t, err)
+		assert.Equal(t, true, ret.IsHealthy)
+	})
+
 	err = svr.Stop()
 	assert.Nil(t, err)
 

internal/indexcoord/index_coord.go

@@ -28,6 +28,10 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/milvus-io/milvus/internal/util/errorutil"
+
+	"golang.org/x/sync/errgroup"
+
 	"go.etcd.io/etcd/api/v3/mvccpb"
 	v3rpc "go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
 	clientv3 "go.etcd.io/etcd/client/v3"
@@ -973,6 +977,39 @@ func (i *IndexCoord) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsReq
 	}, nil
 }
 
+func (i *IndexCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if !i.isHealthy() {
+		reason := errorutil.UnHealthReason("indexcoord", i.session.ServerID, "indexcoord is unhealthy")
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: []string{reason}}, nil
+	}
+
+	mu := &sync.Mutex{}
+	group, ctx := errgroup.WithContext(ctx)
+	errReasons := make([]string, 0, len(i.nodeManager.GetAllClients()))
+
+	for nodeID, indexClient := range i.nodeManager.GetAllClients() {
+		nodeID := nodeID
+		indexClient := indexClient
+		group.Go(func() error {
+			sta, err := indexClient.GetComponentStates(ctx)
+			isHealthy, reason := errorutil.UnHealthReasonWithComponentStatesOrErr("indexnode", nodeID, sta, err)
+			if !isHealthy {
+				mu.Lock()
+				defer mu.Unlock()
+				errReasons = append(errReasons, reason)
+			}
+			return err
+		})
+	}
+
+	err := group.Wait()
+	if err != nil || len(errReasons) != 0 {
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: errReasons}, nil
+	}
+
+	return &milvuspb.CheckHealthResponse{IsHealthy: true, Reasons: errReasons}, nil
+}
+
 // watchNodeLoop is used to monitor IndexNode going online and offline.
 // fix datarace in unittest
 // startWatchService will only be invoked at start procedure

internal/indexcoord/index_coord_mock.go

@@ -145,6 +145,12 @@ func (m *Mock) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest)
 	return m.CallGetMetrics(ctx, req)
 }
 
+func (m *Mock) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
+
 func NewIndexCoordMock() *Mock {
 	return &Mock{
 		CallInit: func() error {

internal/indexcoord/index_coord_test.go

@@ -26,15 +26,13 @@ import (
 	"testing"
 	"time"
 
-	"github.com/milvus-io/milvus/internal/metastore/model"
-
-	"github.com/stretchr/testify/assert"
-
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
+	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 	"github.com/milvus-io/milvus/internal/common"
 	"github.com/milvus-io/milvus/internal/indexnode"
 	etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
 	"github.com/milvus-io/milvus/internal/metastore/kv/indexcoord"
+	"github.com/milvus-io/milvus/internal/metastore/model"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/indexpb"
 	"github.com/milvus-io/milvus/internal/proto/internalpb"
@@ -43,6 +41,7 @@ import (
 	"github.com/milvus-io/milvus/internal/util/etcd"
 	"github.com/milvus-io/milvus/internal/util/metricsinfo"
 	"github.com/milvus-io/milvus/internal/util/sessionutil"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestMockEtcd(t *testing.T) {
@@ -1016,3 +1015,60 @@ func TestIndexCoord_pullSegmentInfo(t *testing.T) {
 		assert.Nil(t, info)
 	})
 }
+
+func TestIndexCoord_CheckHealth(t *testing.T) {
+	t.Run("not healthy", func(t *testing.T) {
+		ctx := context.Background()
+		ic := &IndexCoord{session: &sessionutil.Session{ServerID: 1}}
+		ic.stateCode.Store(commonpb.StateCode_Abnormal)
+		resp, err := ic.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.NotEmpty(t, resp.Reasons)
+	})
+
+	t.Run("index node health check is ok", func(t *testing.T) {
+		ctx := context.Background()
+		indexNode := indexnode.NewIndexNodeMock()
+		nm := NewNodeManager(ctx)
+		nm.nodeClients[1] = indexNode
+		ic := &IndexCoord{
+			session:     &sessionutil.Session{ServerID: 1},
+			nodeManager: nm,
+		}
+		ic.stateCode.Store(commonpb.StateCode_Healthy)
+		resp, err := ic.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, true, resp.IsHealthy)
+		assert.Empty(t, resp.Reasons)
+	})
+
+	t.Run("index node health check is fail", func(t *testing.T) {
+		ctx := context.Background()
+		indexNode := indexnode.NewIndexNodeMock()
+		indexNode.CallGetComponentStates = func(ctx context.Context) (*milvuspb.ComponentStates, error) {
+			return &milvuspb.ComponentStates{
+				State: &milvuspb.ComponentInfo{
+					NodeID:    1,
+					StateCode: commonpb.StateCode_Abnormal,
+				},
+				SubcomponentStates: nil,
+				Status: &commonpb.Status{
+					ErrorCode: commonpb.ErrorCode_Success,
+				},
+			}, nil
+		}
+		nm := NewNodeManager(ctx)
+		nm.nodeClients[1] = indexNode
+		ic := &IndexCoord{
+			nodeManager: nm,
+			session:     &sessionutil.Session{ServerID: 1},
+		}
+		ic.stateCode.Store(commonpb.StateCode_Healthy)
+
+		resp, err := ic.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.NotEmpty(t, resp.Reasons)
+	})
+}

internal/mocks/mock_datacoord.go

@@ -123,6 +123,7 @@ func (_c *DataCoord_AssignSegmentID_Call) Return(_a0 *datapb.AssignSegmentIDResp
 	return _c
 }
 
+// BroadcastAlteredCollection provides a mock function with given fields: ctx, req
 func (_m *DataCoord) BroadcastAlteredCollection(ctx context.Context, req *milvuspb.AlterCollectionRequest) (*commonpb.Status, error) {
 	ret := _m.Called(ctx, req)
 
@@ -145,14 +146,14 @@ func (_m *DataCoord) BroadcastAlteredCollection(ctx context.Context, req *milvus
 	return r0, r1
 }
 
-// DataCoord_BroadcastAlteredCollection_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'DataCoord_BroadcastAlteredCollection_Call'
+// DataCoord_BroadcastAlteredCollection_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'BroadcastAlteredCollection'
 type DataCoord_BroadcastAlteredCollection_Call struct {
 	*mock.Call
 }
 
-// AddSegment is a helper method to define mock.On call
+// BroadcastAlteredCollection is a helper method to define mock.On call
 //  - ctx context.Context
-//  - req *datapb.AddSegmentRequest
+//  - req *milvuspb.AlterCollectionRequest
 func (_e *DataCoord_Expecter) BroadcastAlteredCollection(ctx interface{}, req interface{}) *DataCoord_BroadcastAlteredCollection_Call {
 	return &DataCoord_BroadcastAlteredCollection_Call{Call: _e.mock.On("BroadcastAlteredCollection", ctx, req)}
 }
@@ -169,6 +170,53 @@ func (_c *DataCoord_BroadcastAlteredCollection_Call) Return(_a0 *commonpb.Status
 	return _c
 }
 
+// CheckHealth provides a mock function with given fields: ctx, req
+func (_m *DataCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	ret := _m.Called(ctx, req)
+
+	var r0 *milvuspb.CheckHealthResponse
+	if rf, ok := ret.Get(0).(func(context.Context, *milvuspb.CheckHealthRequest) *milvuspb.CheckHealthResponse); ok {
+		r0 = rf(ctx, req)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*milvuspb.CheckHealthResponse)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *milvuspb.CheckHealthRequest) error); ok {
+		r1 = rf(ctx, req)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// DataCoord_CheckHealth_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'CheckHealth'
+type DataCoord_CheckHealth_Call struct {
+	*mock.Call
+}
+
+// CheckHealth is a helper method to define mock.On call
+//  - ctx context.Context
+//  - req *milvuspb.CheckHealthRequest
+func (_e *DataCoord_Expecter) CheckHealth(ctx interface{}, req interface{}) *DataCoord_CheckHealth_Call {
+	return &DataCoord_CheckHealth_Call{Call: _e.mock.On("CheckHealth", ctx, req)}
+}
+
+func (_c *DataCoord_CheckHealth_Call) Run(run func(ctx context.Context, req *milvuspb.CheckHealthRequest)) *DataCoord_CheckHealth_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(*milvuspb.CheckHealthRequest))
+	})
+	return _c
+}
+
+func (_c *DataCoord_CheckHealth_Call) Return(_a0 *milvuspb.CheckHealthResponse, _a1 error) *DataCoord_CheckHealth_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
 // DropVirtualChannel provides a mock function with given fields: ctx, req
 func (_m *DataCoord) DropVirtualChannel(ctx context.Context, req *datapb.DropVirtualChannelRequest) (*datapb.DropVirtualChannelResponse, error) {
 	ret := _m.Called(ctx, req)
@@ -520,28 +568,6 @@ func (_m *DataCoord) GetFlushedSegments(ctx context.Context, req *datapb.GetFlus
 	return r0, r1
 }
 
-func (_m *DataCoord) GetSegmentsByStates(ctx context.Context, req *datapb.GetSegmentsByStatesRequest) (*datapb.GetSegmentsByStatesResponse, error) {
-	ret := _m.Called(ctx, req)
-
-	var r0 *datapb.GetSegmentsByStatesResponse
-	if rf, ok := ret.Get(0).(func(context.Context, *datapb.GetSegmentsByStatesRequest) *datapb.GetSegmentsByStatesResponse); ok {
-		r0 = rf(ctx, req)
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*datapb.GetSegmentsByStatesResponse)
-		}
-	}
-
-	var r1 error
-	if rf, ok := ret.Get(1).(func(context.Context, *datapb.GetSegmentsByStatesRequest) error); ok {
-		r1 = rf(ctx, req)
-	} else {
-		r1 = ret.Error(1)
-	}
-
-	return r0, r1
-}
-
 // DataCoord_GetFlushedSegments_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetFlushedSegments'
 type DataCoord_GetFlushedSegments_Call struct {
 	*mock.Call
@@ -894,6 +920,53 @@ func (_c *DataCoord_GetSegmentStates_Call) Return(_a0 *datapb.GetSegmentStatesRe
 	return _c
 }
 
+// GetSegmentsByStates provides a mock function with given fields: ctx, req
+func (_m *DataCoord) GetSegmentsByStates(ctx context.Context, req *datapb.GetSegmentsByStatesRequest) (*datapb.GetSegmentsByStatesResponse, error) {
+	ret := _m.Called(ctx, req)
+
+	var r0 *datapb.GetSegmentsByStatesResponse
+	if rf, ok := ret.Get(0).(func(context.Context, *datapb.GetSegmentsByStatesRequest) *datapb.GetSegmentsByStatesResponse); ok {
+		r0 = rf(ctx, req)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*datapb.GetSegmentsByStatesResponse)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *datapb.GetSegmentsByStatesRequest) error); ok {
+		r1 = rf(ctx, req)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// DataCoord_GetSegmentsByStates_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetSegmentsByStates'
+type DataCoord_GetSegmentsByStates_Call struct {
+	*mock.Call
+}
+
+// GetSegmentsByStates is a helper method to define mock.On call
+//  - ctx context.Context
+//  - req *datapb.GetSegmentsByStatesRequest
+func (_e *DataCoord_Expecter) GetSegmentsByStates(ctx interface{}, req interface{}) *DataCoord_GetSegmentsByStates_Call {
+	return &DataCoord_GetSegmentsByStates_Call{Call: _e.mock.On("GetSegmentsByStates", ctx, req)}
+}
+
+func (_c *DataCoord_GetSegmentsByStates_Call) Run(run func(ctx context.Context, req *datapb.GetSegmentsByStatesRequest)) *DataCoord_GetSegmentsByStates_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(*datapb.GetSegmentsByStatesRequest))
+	})
+	return _c
+}
+
+func (_c *DataCoord_GetSegmentsByStates_Call) Return(_a0 *datapb.GetSegmentsByStatesResponse, _a1 error) *DataCoord_GetSegmentsByStates_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
 // GetStatisticsChannel provides a mock function with given fields: ctx
 func (_m *DataCoord) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
 	ret := _m.Called(ctx)

internal/mocks/mock_indexcoord.go

@@ -29,6 +29,53 @@ func (_m *MockIndexCoord) EXPECT() *MockIndexCoord_Expecter {
 	return &MockIndexCoord_Expecter{mock: &_m.Mock}
 }
 
+// CheckHealth provides a mock function with given fields: ctx, req
+func (_m *MockIndexCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	ret := _m.Called(ctx, req)
+
+	var r0 *milvuspb.CheckHealthResponse
+	if rf, ok := ret.Get(0).(func(context.Context, *milvuspb.CheckHealthRequest) *milvuspb.CheckHealthResponse); ok {
+		r0 = rf(ctx, req)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*milvuspb.CheckHealthResponse)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *milvuspb.CheckHealthRequest) error); ok {
+		r1 = rf(ctx, req)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockIndexCoord_CheckHealth_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'CheckHealth'
+type MockIndexCoord_CheckHealth_Call struct {
+	*mock.Call
+}
+
+// CheckHealth is a helper method to define mock.On call
+//  - ctx context.Context
+//  - req *milvuspb.CheckHealthRequest
+func (_e *MockIndexCoord_Expecter) CheckHealth(ctx interface{}, req interface{}) *MockIndexCoord_CheckHealth_Call {
+	return &MockIndexCoord_CheckHealth_Call{Call: _e.mock.On("CheckHealth", ctx, req)}
+}
+
+func (_c *MockIndexCoord_CheckHealth_Call) Run(run func(ctx context.Context, req *milvuspb.CheckHealthRequest)) *MockIndexCoord_CheckHealth_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(*milvuspb.CheckHealthRequest))
+	})
+	return _c
+}
+
+func (_c *MockIndexCoord_CheckHealth_Call) Return(_a0 *milvuspb.CheckHealthResponse, _a1 error) *MockIndexCoord_CheckHealth_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
 // CreateIndex provides a mock function with given fields: ctx, req
 func (_m *MockIndexCoord) CreateIndex(ctx context.Context, req *indexpb.CreateIndexRequest) (*commonpb.Status, error) {
 	ret := _m.Called(ctx, req)

internal/mocks/mock_rootcoord.go

@@ -172,6 +172,100 @@ func (_c *RootCoord_AlterAlias_Call) Return(_a0 *commonpb.Status, _a1 error) *Ro
 	return _c
 }
 
+// AlterCollection provides a mock function with given fields: ctx, request
+func (_m *RootCoord) AlterCollection(ctx context.Context, request *milvuspb.AlterCollectionRequest) (*commonpb.Status, error) {
+	ret := _m.Called(ctx, request)
+
+	var r0 *commonpb.Status
+	if rf, ok := ret.Get(0).(func(context.Context, *milvuspb.AlterCollectionRequest) *commonpb.Status); ok {
+		r0 = rf(ctx, request)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*commonpb.Status)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *milvuspb.AlterCollectionRequest) error); ok {
+		r1 = rf(ctx, request)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// RootCoord_AlterCollection_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'AlterCollection'
+type RootCoord_AlterCollection_Call struct {
+	*mock.Call
+}
+
+// AlterCollection is a helper method to define mock.On call
+//  - ctx context.Context
+//  - request *milvuspb.AlterCollectionRequest
+func (_e *RootCoord_Expecter) AlterCollection(ctx interface{}, request interface{}) *RootCoord_AlterCollection_Call {
+	return &RootCoord_AlterCollection_Call{Call: _e.mock.On("AlterCollection", ctx, request)}
+}
+
+func (_c *RootCoord_AlterCollection_Call) Run(run func(ctx context.Context, request *milvuspb.AlterCollectionRequest)) *RootCoord_AlterCollection_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(*milvuspb.AlterCollectionRequest))
+	})
+	return _c
+}
+
+func (_c *RootCoord_AlterCollection_Call) Return(_a0 *commonpb.Status, _a1 error) *RootCoord_AlterCollection_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+// CheckHealth provides a mock function with given fields: ctx, req
+func (_m *RootCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	ret := _m.Called(ctx, req)
+
+	var r0 *milvuspb.CheckHealthResponse
+	if rf, ok := ret.Get(0).(func(context.Context, *milvuspb.CheckHealthRequest) *milvuspb.CheckHealthResponse); ok {
+		r0 = rf(ctx, req)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*milvuspb.CheckHealthResponse)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *milvuspb.CheckHealthRequest) error); ok {
+		r1 = rf(ctx, req)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// RootCoord_CheckHealth_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'CheckHealth'
+type RootCoord_CheckHealth_Call struct {
+	*mock.Call
+}
+
+// CheckHealth is a helper method to define mock.On call
+//  - ctx context.Context
+//  - req *milvuspb.CheckHealthRequest
+func (_e *RootCoord_Expecter) CheckHealth(ctx interface{}, req interface{}) *RootCoord_CheckHealth_Call {
+	return &RootCoord_CheckHealth_Call{Call: _e.mock.On("CheckHealth", ctx, req)}
+}
+
+func (_c *RootCoord_CheckHealth_Call) Run(run func(ctx context.Context, req *milvuspb.CheckHealthRequest)) *RootCoord_CheckHealth_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(*milvuspb.CheckHealthRequest))
+	})
+	return _c
+}
+
+func (_c *RootCoord_CheckHealth_Call) Return(_a0 *milvuspb.CheckHealthResponse, _a1 error) *RootCoord_CheckHealth_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
 // CreateAlias provides a mock function with given fields: ctx, req
 func (_m *RootCoord) CreateAlias(ctx context.Context, req *milvuspb.CreateAliasRequest) (*commonpb.Status, error) {
 	ret := _m.Called(ctx, req)
@@ -1698,53 +1792,6 @@ func (_c *RootCoord_ShowCollections_Call) Return(_a0 *milvuspb.ShowCollectionsRe
 	return _c
 }
 
-// ShowCollections provides a mock function with given fields: ctx, req
-func (_m *RootCoord) AlterCollection(ctx context.Context, req *milvuspb.AlterCollectionRequest) (*commonpb.Status, error) {
-	ret := _m.Called(ctx, req)
-
-	var r0 *commonpb.Status
-	if rf, ok := ret.Get(0).(func(context.Context, *milvuspb.AlterCollectionRequest) *commonpb.Status); ok {
-		r0 = rf(ctx, req)
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*commonpb.Status)
-		}
-	}
-
-	var r1 error
-	if rf, ok := ret.Get(1).(func(context.Context, *milvuspb.AlterCollectionRequest) error); ok {
-		r1 = rf(ctx, req)
-	} else {
-		r1 = ret.Error(1)
-	}
-
-	return r0, r1
-}
-
-// RootCoord_AlterCollection_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'ShowCollections'
-type RootCoord_AlterCollection_Call struct {
-	*mock.Call
-}
-
-// AlterCollection is a helper method to define mock.On call
-//  - ctx context.Context
-//  - req *milvuspb.AlterCollectionRequest
-func (_e *RootCoord_Expecter) AlterCollection(ctx interface{}, req interface{}) *RootCoord_AlterCollection_Call {
-	return &RootCoord_AlterCollection_Call{Call: _e.mock.On("AlterCollection", ctx, req)}
-}
-
-func (_c *RootCoord_AlterCollection_Call) Run(run func(ctx context.Context, req *milvuspb.AlterCollectionRequest)) *RootCoord_AlterCollection_Call {
-	_c.Call.Run(func(args mock.Arguments) {
-		run(args[0].(context.Context), args[1].(*milvuspb.AlterCollectionRequest))
-	})
-	return _c
-}
-
-func (_c *RootCoord_AlterCollection_Call) Return(_a0 *commonpb.Status, _a1 error) *RootCoord_AlterCollection_Call {
-	_c.Call.Return(_a0, _a1)
-	return _c
-}
-
 // ShowConfigurations provides a mock function with given fields: ctx, req
 func (_m *RootCoord) ShowConfigurations(ctx context.Context, req *internalpb.ShowConfigurationsRequest) (*internalpb.ShowConfigurationsResponse, error) {
 	ret := _m.Called(ctx, req)

internal/proto/data_coord.proto

@@ -65,6 +65,8 @@ service DataCoord {
   rpc MarkSegmentsDropped(MarkSegmentsDroppedRequest) returns(common.Status) {}
 
   rpc BroadcastAlteredCollection(milvus.AlterCollectionRequest) returns (common.Status) {}
+
+  rpc CheckHealth(milvus.CheckHealthRequest) returns (milvus.CheckHealthResponse) {}
 }
 
 service DataNode {

internal/proto/datapb/data_coord.pb.go

@@ -4796,13 +4796,13 @@ func init() {
 func init() { proto.RegisterFile("data_coord.proto", fileDescriptor_82cd95f524594f49) }
 
 var fileDescriptor_82cd95f524594f49 = []byte{
-	// 4252 bytes of a gzipped FileDescriptorProto
+	// 4272 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe4, 0x3c, 0x4b, 0x6f, 0x24, 0x49,
 	0x5a, 0x9d, 0xf5, 0x72, 0xd5, 0x57, 0x0f, 0x97, 0xa3, 0x7b, 0xec, 0xea, 0xea, 0xe7, 0x64, 0x4f,
 	0xcf, 0xf4, 0xf4, 0xf4, 0x74, 0xcf, 0x78, 0x18, 0xed, 0x40, 0xef, 0xcc, 0xaa, 0xdd, 0x9e, 0x76,
 	0x17, 0xd8, 0x5e, 0x6f, 0xda, 0x3d, 0x2d, 0xed, 0x22, 0x95, 0xd2, 0x95, 0xe1, 0x72, 0xae, 0xf3,
 	0x51, 0x9d, 0x99, 0x65, 0xb7, 0x97, 0xc3, 0x8e, 0x58, 0x09, 0x69, 0x11, 0x62, 0x79, 0x08, 0x09,
-	0x0e, 0x48, 0x88, 0xd3, 0x02, 0x42, 0x42, 0x5a, 0x21, 0x01, 0x17, 0x0e, 0x5c, 0x46, 0x70, 0x58,
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -5111,6 +5112,7 @@ type DataCoordClient interface {
 	UnsetIsImportingState(ctx context.Context, in *UnsetIsImportingStateRequest, opts ...grpc.CallOption) (*commonpb.Status, error)
 	MarkSegmentsDropped(ctx context.Context, in *MarkSegmentsDroppedRequest, opts ...grpc.CallOption) (*commonpb.Status, error)
 	BroadcastAlteredCollection(ctx context.Context, in *milvuspb.AlterCollectionRequest, opts ...grpc.CallOption) (*commonpb.Status, error)
+	CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error)
 }
 
 type dataCoordClient struct {
@@ -5409,6 +5411,15 @@ func (c *dataCoordClient) BroadcastAlteredCollection(ctx context.Context, in *mi
 	return out, nil
 }
 
+func (c *dataCoordClient) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error) {
+	out := new(milvuspb.CheckHealthResponse)
+	err := c.cc.Invoke(ctx, "/milvus.proto.data.DataCoord/CheckHealth", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // DataCoordServer is the server API for DataCoord service.
 type DataCoordServer interface {
 	GetComponentStates(context.Context, *milvuspb.GetComponentStatesRequest) (*milvuspb.ComponentStates, error)
@@ -5445,6 +5456,7 @@ type DataCoordServer interface {
 	UnsetIsImportingState(context.Context, *UnsetIsImportingStateRequest) (*commonpb.Status, error)
 	MarkSegmentsDropped(context.Context, *MarkSegmentsDroppedRequest) (*commonpb.Status, error)
 	BroadcastAlteredCollection(context.Context, *milvuspb.AlterCollectionRequest) (*commonpb.Status, error)
+	CheckHealth(context.Context, *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // UnimplementedDataCoordServer can be embedded to have forward compatible implementations.
@@ -5547,6 +5559,9 @@ func (*UnimplementedDataCoordServer) MarkSegmentsDropped(ctx context.Context, re
 func (*UnimplementedDataCoordServer) BroadcastAlteredCollection(ctx context.Context, req *milvuspb.AlterCollectionRequest) (*commonpb.Status, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method BroadcastAlteredCollection not implemented")
 }
+func (*UnimplementedDataCoordServer) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckHealth not implemented")
+}
 
 func RegisterDataCoordServer(s *grpc.Server, srv DataCoordServer) {
 	s.RegisterService(&_DataCoord_serviceDesc, srv)
@@ -6128,6 +6143,24 @@ func _DataCoord_BroadcastAlteredCollection_Handler(srv interface{}, ctx context.
 	return interceptor(ctx, in, info, handler)
 }
 
+func _DataCoord_CheckHealth_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(milvuspb.CheckHealthRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(DataCoordServer).CheckHealth(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/milvus.proto.data.DataCoord/CheckHealth",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(DataCoordServer).CheckHealth(ctx, req.(*milvuspb.CheckHealthRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _DataCoord_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "milvus.proto.data.DataCoord",
 	HandlerType: (*DataCoordServer)(nil),
@@ -6260,6 +6293,10 @@ var _DataCoord_serviceDesc = grpc.ServiceDesc{
 			MethodName: "BroadcastAlteredCollection",
 			Handler:    _DataCoord_BroadcastAlteredCollection_Handler,
 		},
+		{
+			MethodName: "CheckHealth",
+			Handler:    _DataCoord_CheckHealth_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "data_coord.proto",

internal/proto/index_coord.proto

@@ -24,6 +24,8 @@ service IndexCoord {
   rpc ShowConfigurations(internal.ShowConfigurationsRequest) returns (internal.ShowConfigurationsResponse){}
   // https://wiki.lfaidata.foundation/display/MIL/MEP+8+--+Add+metrics+for+proxy
   rpc GetMetrics(milvus.GetMetricsRequest) returns (milvus.GetMetricsResponse) {}
+
+  rpc CheckHealth(milvus.CheckHealthRequest) returns (milvus.CheckHealthResponse) {}
 }
 
 service IndexNode {

internal/proto/indexpb/index_coord.pb.go

@@ -2020,141 +2020,143 @@ func init() {
 func init() { proto.RegisterFile("index_coord.proto", fileDescriptor_f9e019eb3fda53c2) }
 
 var fileDescriptor_f9e019eb3fda53c2 = []byte{
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+	0x0e, 0x61, 0x20, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -2183,6 +2185,7 @@ type IndexCoordClient interface {
 	ShowConfigurations(ctx context.Context, in *internalpb.ShowConfigurationsRequest, opts ...grpc.CallOption) (*internalpb.ShowConfigurationsResponse, error)
 	// https://wiki.lfaidata.foundation/display/MIL/MEP+8+--+Add+metrics+for+proxy
 	GetMetrics(ctx context.Context, in *milvuspb.GetMetricsRequest, opts ...grpc.CallOption) (*milvuspb.GetMetricsResponse, error)
+	CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error)
 }
 
 type indexCoordClient struct {
@@ -2292,6 +2295,15 @@ func (c *indexCoordClient) GetMetrics(ctx context.Context, in *milvuspb.GetMetri
 	return out, nil
 }
 
+func (c *indexCoordClient) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error) {
+	out := new(milvuspb.CheckHealthResponse)
+	err := c.cc.Invoke(ctx, "/milvus.proto.index.IndexCoord/CheckHealth", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // IndexCoordServer is the server API for IndexCoord service.
 type IndexCoordServer interface {
 	GetComponentStates(context.Context, *milvuspb.GetComponentStatesRequest) (*milvuspb.ComponentStates, error)
@@ -2308,6 +2320,7 @@ type IndexCoordServer interface {
 	ShowConfigurations(context.Context, *internalpb.ShowConfigurationsRequest) (*internalpb.ShowConfigurationsResponse, error)
 	// https://wiki.lfaidata.foundation/display/MIL/MEP+8+--+Add+metrics+for+proxy
 	GetMetrics(context.Context, *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error)
+	CheckHealth(context.Context, *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // UnimplementedIndexCoordServer can be embedded to have forward compatible implementations.
@@ -2347,6 +2360,9 @@ func (*UnimplementedIndexCoordServer) ShowConfigurations(ctx context.Context, re
 func (*UnimplementedIndexCoordServer) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetMetrics not implemented")
 }
+func (*UnimplementedIndexCoordServer) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckHealth not implemented")
+}
 
 func RegisterIndexCoordServer(s *grpc.Server, srv IndexCoordServer) {
 	s.RegisterService(&_IndexCoord_serviceDesc, srv)
@@ -2550,6 +2566,24 @@ func _IndexCoord_GetMetrics_Handler(srv interface{}, ctx context.Context, dec fu
 	return interceptor(ctx, in, info, handler)
 }
 
+func _IndexCoord_CheckHealth_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(milvuspb.CheckHealthRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(IndexCoordServer).CheckHealth(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/milvus.proto.index.IndexCoord/CheckHealth",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(IndexCoordServer).CheckHealth(ctx, req.(*milvuspb.CheckHealthRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _IndexCoord_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "milvus.proto.index.IndexCoord",
 	HandlerType: (*IndexCoordServer)(nil),
@@ -2598,6 +2632,10 @@ var _IndexCoord_serviceDesc = grpc.ServiceDesc{
 			MethodName: "GetMetrics",
 			Handler:    _IndexCoord_GetMetrics_Handler,
 		},
+		{
+			MethodName: "CheckHealth",
+			Handler:    _IndexCoord_CheckHealth_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "index_coord.proto",

internal/proto/query_coord.proto

@@ -34,6 +34,8 @@ service QueryCoord {
   // https://wiki.lfaidata.foundation/display/MIL/MEP+23+--+Multiple+memory+replication+design
   rpc GetReplicas(milvus.GetReplicasRequest) returns (milvus.GetReplicasResponse) {}
   rpc GetShardLeaders(GetShardLeadersRequest) returns (GetShardLeadersResponse) {}
+
+  rpc CheckHealth(milvus.CheckHealthRequest) returns (milvus.CheckHealthResponse) {}
 }
 
 service QueryNode {

internal/proto/querypb/query_coord.pb.go

@@ -3682,233 +3682,234 @@ func init() {
 func init() { proto.RegisterFile("query_coord.proto", fileDescriptor_aab7cc9a69ed26e8) }
 
 var fileDescriptor_aab7cc9a69ed26e8 = []byte{
-	// 3606 bytes of a gzipped FileDescriptorProto
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -3941,6 +3942,7 @@ type QueryCoordClient interface {
 	// https://wiki.lfaidata.foundation/display/MIL/MEP+23+--+Multiple+memory+replication+design
 	GetReplicas(ctx context.Context, in *milvuspb.GetReplicasRequest, opts ...grpc.CallOption) (*milvuspb.GetReplicasResponse, error)
 	GetShardLeaders(ctx context.Context, in *GetShardLeadersRequest, opts ...grpc.CallOption) (*GetShardLeadersResponse, error)
+	CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error)
 }
 
 type queryCoordClient struct {
@@ -4095,6 +4097,15 @@ func (c *queryCoordClient) GetShardLeaders(ctx context.Context, in *GetShardLead
 	return out, nil
 }
 
+func (c *queryCoordClient) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error) {
+	out := new(milvuspb.CheckHealthResponse)
+	err := c.cc.Invoke(ctx, "/milvus.proto.query.QueryCoord/CheckHealth", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // QueryCoordServer is the server API for QueryCoord service.
 type QueryCoordServer interface {
 	GetComponentStates(context.Context, *milvuspb.GetComponentStatesRequest) (*milvuspb.ComponentStates, error)
@@ -4115,6 +4126,7 @@ type QueryCoordServer interface {
 	// https://wiki.lfaidata.foundation/display/MIL/MEP+23+--+Multiple+memory+replication+design
 	GetReplicas(context.Context, *milvuspb.GetReplicasRequest) (*milvuspb.GetReplicasResponse, error)
 	GetShardLeaders(context.Context, *GetShardLeadersRequest) (*GetShardLeadersResponse, error)
+	CheckHealth(context.Context, *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // UnimplementedQueryCoordServer can be embedded to have forward compatible implementations.
@@ -4169,6 +4181,9 @@ func (*UnimplementedQueryCoordServer) GetReplicas(ctx context.Context, req *milv
 func (*UnimplementedQueryCoordServer) GetShardLeaders(ctx context.Context, req *GetShardLeadersRequest) (*GetShardLeadersResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetShardLeaders not implemented")
 }
+func (*UnimplementedQueryCoordServer) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckHealth not implemented")
+}
 
 func RegisterQueryCoordServer(s *grpc.Server, srv QueryCoordServer) {
 	s.RegisterService(&_QueryCoord_serviceDesc, srv)
@@ -4462,6 +4477,24 @@ func _QueryCoord_GetShardLeaders_Handler(srv interface{}, ctx context.Context, d
 	return interceptor(ctx, in, info, handler)
 }
 
+func _QueryCoord_CheckHealth_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(milvuspb.CheckHealthRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(QueryCoordServer).CheckHealth(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/milvus.proto.query.QueryCoord/CheckHealth",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(QueryCoordServer).CheckHealth(ctx, req.(*milvuspb.CheckHealthRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _QueryCoord_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "milvus.proto.query.QueryCoord",
 	HandlerType: (*QueryCoordServer)(nil),
@@ -4530,6 +4563,10 @@ var _QueryCoord_serviceDesc = grpc.ServiceDesc{
 			MethodName: "GetShardLeaders",
 			Handler:    _QueryCoord_GetShardLeaders_Handler,
 		},
+		{
+			MethodName: "CheckHealth",
+			Handler:    _QueryCoord_CheckHealth_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "query_coord.proto",

internal/proto/root_coord.proto

@@ -135,6 +135,8 @@ service RootCoord {
     rpc OperatePrivilege(milvus.OperatePrivilegeRequest) returns (common.Status) {}
     rpc SelectGrant(milvus.SelectGrantRequest) returns (milvus.SelectGrantResponse) {}
     rpc ListPolicy(internal.ListPolicyRequest) returns (internal.ListPolicyResponse) {}
+
+    rpc CheckHealth(milvus.CheckHealthRequest) returns (milvus.CheckHealthResponse) {}
 }
 
 message AllocTimestampRequest {

internal/proto/rootcoordpb/root_coord.pb.go

@@ -674,102 +674,103 @@ func init() {
 func init() { proto.RegisterFile("root_coord.proto", fileDescriptor_4513485a144f6b06) }
 
 var fileDescriptor_4513485a144f6b06 = []byte{
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+	0x95, 0xb6, 0x6f, 0x25, 0xda, 0xf2, 0x0d, 0x39, 0xfd, 0x1e, 0x3b, 0x33, 0xb2, 0x8f, 0x6d, 0x66,
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+	0x39, 0xf1, 0x38, 0xc0, 0x0e, 0x7e, 0x72, 0x44, 0xe0, 0x12, 0x39, 0x11, 0x0c, 0x0f, 0xc2, 0x5c,
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+	0x05, 0x3b, 0x35, 0xaa, 0x24, 0x3a, 0x5b, 0xff, 0x05, 0x2e, 0x27, 0x01, 0xd1, 0x26, 0x14, 0x0e,
+	0xc9, 0xa9, 0xef, 0x76, 0xf9, 0x13, 0x6d, 0xc3, 0xca, 0x91, 0x3c, 0x4a, 0x9e, 0x9f, 0x17, 0xce,
+	0x86, 0xb7, 0xa1, 0xf9, 0x4e, 0x14, 0xf4, 0x79, 0xfe, 0x59, 0xae, 0xf9, 0x57, 0x1e, 0x6a, 0x8b,
+	0xc7, 0xed, 0x53, 0x6a, 0x45, 0x96, 0x23, 0x37, 0x82, 0x0d, 0x3f, 0xd0, 0x11, 0xd7, 0xed, 0xa4,
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+	0x92, 0xe0, 0xbd, 0xe7, 0x51, 0xef, 0xdd, 0xc9, 0x12, 0xc2, 0xb0, 0x17, 0x2d, 0xb8, 0xbc, 0x4b,
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+	0xc7, 0x89, 0x32, 0xa6, 0x68, 0xe8, 0x71, 0xf3, 0xf7, 0x1c, 0x5c, 0x89, 0xc9, 0x7c, 0x4a, 0xa0,
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+	0x97, 0xb8, 0xaa, 0xb0, 0x72, 0xd4, 0x8e, 0x1a, 0xe0, 0x0f, 0x16, 0x81, 0xbe, 0xa3, 0xea, 0x77,
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+	0xea, 0xf5, 0x05, 0xb3, 0xdd, 0x51, 0xe0, 0xd5, 0xe6, 0x05, 0xf4, 0xc1, 0x8b, 0xab, 0x54, 0xb7,
+	0xb9, 0xb0, 0x4d, 0x1e, 0x08, 0x6e, 0xa7, 0x0b, 0x2e, 0x80, 0xcf, 0x29, 0x39, 0x80, 0xcd, 0x0e,
+	0x23, 0x58, 0x90, 0x8e, 0x4e, 0x18, 0xf4, 0x30, 0xd9, 0x3b, 0x31, 0x58, 0x20, 0xb4, 0x2c, 0xf8,
+	0xcd, 0x0b, 0xe8, 0x27, 0xa8, 0x74, 0x19, 0x9d, 0x86, 0xe8, 0xef, 0x27, 0xd2, 0x47, 0x41, 0x19,
+	0xc9, 0x07, 0xb0, 0xf1, 0x0a, 0xf3, 0x10, 0xf7, 0xbd, 0x44, 0xee, 0x08, 0x26, 0xa0, 0xbe, 0x95,
+	0x08, 0xdd, 0xa1, 0xd4, 0x09, 0xb9, 0xe7, 0x18, 0x50, 0x50, 0x0c, 0x42, 0x2a, 0xc9, 0xc7, 0x6d,
+	0x11, 0x18, 0x48, 0x6d, 0x65, 0xc6, 0x6b, 0xe1, 0xb7, 0x50, 0x52, 0x0e, 0x7f, 0xe1, 0xd8, 0x98,
+	0xa3, 0xbb, 0x4b, 0x42, 0xe2, 0x21, 0x32, 0x3a, 0xec, 0x3b, 0x28, 0x4a, 0x47, 0x2b, 0xd2, 0xff,
+	0xa7, 0x06, 0xe2, 0x3c, 0x94, 0x7d, 0x80, 0x17, 0x8e, 0x20, 0x4c, 0x71, 0x7e, 0x91, 0xc8, 0x39,
+	0x07, 0x64, 0x24, 0x75, 0xa1, 0xda, 0x1f, 0xcb, 0xcb, 0x4d, 0xe0, 0x1a, 0x8e, 0x1e, 0x24, 0x1f,
+	0xe8, 0x28, 0x2a, 0xa0, 0x7f, 0x98, 0x0d, 0xac, 0xdd, 0x7d, 0x20, 0x6f, 0xae, 0x82, 0xb0, 0x50,
+	0x90, 0x1f, 0xa4, 0xef, 0xe4, 0xdc, 0xe7, 0xf4, 0x00, 0xaa, 0x2a, 0x56, 0xfb, 0xc1, 0x7d, 0x24,
+	0x85, 0x3e, 0x86, 0xca, 0x48, 0xff, 0x03, 0x6c, 0xc8, 0xa8, 0xcd, 0xc9, 0xef, 0xa5, 0x46, 0xf6,
+	0xbc, 0xd4, 0x07, 0x50, 0x7e, 0x85, 0xf9, 0x9c, 0xb9, 0x95, 0x96, 0x60, 0x0b, 0xc4, 0x99, 0xf2,
+	0xeb, 0x10, 0x2a, 0x32, 0x28, 0xfa, 0x63, 0x9e, 0x52, 0x1d, 0xa2, 0xa0, 0x40, 0xe2, 0x41, 0x26,
+	0xac, 0x16, 0x23, 0x50, 0x96, 0x6b, 0x41, 0x57, 0x4f, 0xd9, 0x4b, 0x18, 0x12, 0x08, 0xdd, 0xcb,
+	0x80, 0x0c, 0x55, 0xf1, 0x4a, 0xf4, 0x89, 0x87, 0x1e, 0xa5, 0x35, 0xf8, 0xc4, 0xc7, 0x66, 0xbd,
+	0x9d, 0x15, 0xae, 0x25, 0x7f, 0x86, 0x35, 0xff, 0xe1, 0x15, 0x4f, 0xc0, 0xd8, 0xc7, 0xfa, 0xcd,
+	0x57, 0xbf, 0x7b, 0x26, 0x4e, 0xb3, 0x63, 0xb8, 0xf2, 0x76, 0x6a, 0xc9, 0xe2, 0xaf, 0x5a, 0x4c,
+	0xd0, 0xe4, 0xe2, 0xc7, 0x4c, 0xf7, 0xa5, 0x18, 0x6e, 0x8f, 0x8f, 0xce, 0x3a, 0x66, 0x0c, 0xfe,
+	0xdb, 0x73, 0x8f, 0xb0, 0x63, 0x5b, 0x91, 0x1e, 0xb3, 0x47, 0x04, 0xee, 0x60, 0x73, 0x4c, 0xe2,
+	0x2d, 0x50, 0xbd, 0xe2, 0xa3, 0x9f, 0x68, 0x70, 0xc6, 0xa3, 0xfd, 0x2b, 0x20, 0x55, 0x10, 0xdc,
+	0xf7, 0xf6, 0x68, 0xc6, 0xb0, 0x3a, 0x7f, 0x69, 0xcd, 0x7d, 0x11, 0x1a, 0xc8, 0x7c, 0x79, 0x8e,
+	0x2f, 0x42, 0x7d, 0x17, 0x76, 0x89, 0xd8, 0x23, 0x82, 0xd9, 0x66, 0x5a, 0xd5, 0x9c, 0x03, 0x52,
+	0x82, 0x96, 0x80, 0xd3, 0x02, 0x7d, 0x58, 0x55, 0x6f, 0x4f, 0xd4, 0x4c, 0xfc, 0x28, 0x78, 0x39,
+	0x2f, 0xbb, 0x2d, 0xe8, 0xd7, 0x75, 0x28, 0x5d, 0x77, 0x89, 0x08, 0xbd, 0x69, 0x53, 0xd2, 0x35,
+	0x0a, 0x5a, 0x9e, 0xae, 0x71, 0xac, 0x16, 0x73, 0xa1, 0xfa, 0xad, 0xcd, 0xfd, 0xc5, 0x37, 0x98,
+	0x1f, 0xa6, 0xf5, 0x80, 0x18, 0x6a, 0x79, 0x0f, 0x58, 0x00, 0x87, 0x3c, 0x56, 0x36, 0x88, 0x5c,
+	0xf0, 0xfd, 0x96, 0x7a, 0x2d, 0x0f, 0xff, 0xe9, 0x70, 0xd6, 0x21, 0x7b, 0xa7, 0xef, 0x57, 0xfa,
+	0x1a, 0x1d, 0xef, 0xbb, 0xf3, 0xb4, 0xd1, 0x10, 0x79, 0xe3, 0xcf, 0xc0, 0xec, 0x67, 0xe5, 0xe7,
+	0x66, 0x1e, 0xc0, 0x66, 0x97, 0x38, 0x24, 0xc2, 0xfc, 0x30, 0xe5, 0x0a, 0x13, 0x85, 0x65, 0xcc,
+	0xbc, 0x31, 0x6c, 0xc8, 0x30, 0xc8, 0xef, 0xde, 0x72, 0xc2, 0x78, 0x4a, 0xbf, 0x8a, 0x60, 0x02,
+	0xea, 0xfb, 0x59, 0xa0, 0xa1, 0x33, 0xb4, 0x11, 0x79, 0xc2, 0xc4, 0xf7, 0x31, 0x0f, 0x6a, 0xd2,
+	0x83, 0xaa, 0xfe, 0x28, 0x23, 0x3a, 0x74, 0x86, 0x40, 0x85, 0xdb, 0xa0, 0x0e, 0x49, 0x49, 0xeb,
+	0x39, 0x20, 0xa3, 0xbb, 0x5e, 0xc3, 0xba, 0x6c, 0xdd, 0x1e, 0xe5, 0x9d, 0xd4, 0xce, 0x7e, 0x0e,
+	0xc2, 0x03, 0xa8, 0xbe, 0x9e, 0x12, 0x86, 0x05, 0x91, 0xfe, 0xf2, 0x78, 0x93, 0x33, 0x2b, 0x86,
+	0xca, 0x7c, 0x2b, 0x87, 0x3e, 0x91, 0x15, 0x7c, 0x89, 0x13, 0xe6, 0x80, 0xe5, 0xb5, 0x2d, 0x8c,
+	0x0b, 0x17, 0x4f, 0x35, 0x2f, 0x0d, 0x5b, 0x2a, 0xe0, 0x59, 0x9e, 0x41, 0x40, 0xe1, 0xc2, 0xaf,
+	0x22, 0x7f, 0xeb, 0xfb, 0xcc, 0x3e, 0xb2, 0x1d, 0x32, 0x22, 0x29, 0x19, 0x10, 0x87, 0x65, 0x74,
+	0xd1, 0x10, 0x4a, 0x4a, 0x78, 0x97, 0x61, 0x57, 0xa0, 0x65, 0xa6, 0x79, 0x88, 0x80, 0xb6, 0x75,
+	0x36, 0x50, 0x6f, 0xc2, 0x04, 0x90, 0x69, 0xb1, 0x4f, 0x1d, 0xdb, 0x3c, 0x8d, 0x5f, 0x76, 0x74,
+	0x69, 0x98, 0x43, 0x52, 0x2e, 0x3b, 0x89, 0x48, 0x2d, 0x32, 0x84, 0x52, 0x67, 0x4c, 0xcc, 0xc3,
+	0x57, 0x04, 0x3b, 0x62, 0x9c, 0xf6, 0x4e, 0x99, 0x23, 0x96, 0x6f, 0x24, 0x02, 0x0c, 0x34, 0x76,
+	0x9e, 0xfd, 0xf8, 0x74, 0x64, 0x8b, 0xf1, 0x6c, 0x28, 0xdd, 0xb8, 0xa5, 0xa0, 0x8f, 0x6c, 0xea,
+	0xff, 0xda, 0x0a, 0x0c, 0xdc, 0xf2, 0xa8, 0xb6, 0x74, 0x92, 0x4e, 0x87, 0xc3, 0x55, 0x6f, 0xea,
+	0xc9, 0xbf, 0x01, 0x00, 0x00, 0xff, 0xff, 0x94, 0x82, 0xd4, 0x6e, 0x4c, 0x18, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -876,6 +877,7 @@ type RootCoordClient interface {
 	OperatePrivilege(ctx context.Context, in *milvuspb.OperatePrivilegeRequest, opts ...grpc.CallOption) (*commonpb.Status, error)
 	SelectGrant(ctx context.Context, in *milvuspb.SelectGrantRequest, opts ...grpc.CallOption) (*milvuspb.SelectGrantResponse, error)
 	ListPolicy(ctx context.Context, in *internalpb.ListPolicyRequest, opts ...grpc.CallOption) (*internalpb.ListPolicyResponse, error)
+	CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error)
 }
 
 type rootCoordClient struct {
@@ -1246,6 +1248,15 @@ func (c *rootCoordClient) ListPolicy(ctx context.Context, in *internalpb.ListPol
 	return out, nil
 }
 
+func (c *rootCoordClient) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error) {
+	out := new(milvuspb.CheckHealthResponse)
+	err := c.cc.Invoke(ctx, "/milvus.proto.rootcoord.RootCoord/CheckHealth", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // RootCoordServer is the server API for RootCoord service.
 type RootCoordServer interface {
 	GetComponentStates(context.Context, *milvuspb.GetComponentStatesRequest) (*milvuspb.ComponentStates, error)
@@ -1340,6 +1351,7 @@ type RootCoordServer interface {
 	OperatePrivilege(context.Context, *milvuspb.OperatePrivilegeRequest) (*commonpb.Status, error)
 	SelectGrant(context.Context, *milvuspb.SelectGrantRequest) (*milvuspb.SelectGrantResponse, error)
 	ListPolicy(context.Context, *internalpb.ListPolicyRequest) (*internalpb.ListPolicyResponse, error)
+	CheckHealth(context.Context, *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // UnimplementedRootCoordServer can be embedded to have forward compatible implementations.
@@ -1466,6 +1478,9 @@ func (*UnimplementedRootCoordServer) SelectGrant(ctx context.Context, req *milvu
 func (*UnimplementedRootCoordServer) ListPolicy(ctx context.Context, req *internalpb.ListPolicyRequest) (*internalpb.ListPolicyResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ListPolicy not implemented")
 }
+func (*UnimplementedRootCoordServer) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckHealth not implemented")
+}
 
 func RegisterRootCoordServer(s *grpc.Server, srv RootCoordServer) {
 	s.RegisterService(&_RootCoord_serviceDesc, srv)
@@ -2191,6 +2206,24 @@ func _RootCoord_ListPolicy_Handler(srv interface{}, ctx context.Context, dec fun
 	return interceptor(ctx, in, info, handler)
 }
 
+func _RootCoord_CheckHealth_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(milvuspb.CheckHealthRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(RootCoordServer).CheckHealth(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/milvus.proto.rootcoord.RootCoord/CheckHealth",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RootCoordServer).CheckHealth(ctx, req.(*milvuspb.CheckHealthRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _RootCoord_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "milvus.proto.rootcoord.RootCoord",
 	HandlerType: (*RootCoordServer)(nil),
@@ -2355,6 +2388,10 @@ var _RootCoord_serviceDesc = grpc.ServiceDesc{
 			MethodName: "ListPolicy",
 			Handler:    _RootCoord_ListPolicy_Handler,
 		},
+		{
+			MethodName: "CheckHealth",
+			Handler:    _RootCoord_CheckHealth_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "root_coord.proto",

internal/proxy/data_coord_mock_test.go

@@ -39,6 +39,7 @@ type DataCoordMock struct {
 	showConfigurationsFunc showConfigurationsFuncType
 	statisticsChannel      string
 	timeTickChannel        string
+	checkHealthFunc        func(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 func (coord *DataCoordMock) updateState(state commonpb.StateCode) {
@@ -130,6 +131,13 @@ func (coord *DataCoordMock) BroadcastAlteredCollection(ctx context.Context, req
 	panic("implement me")
 }
 
+func (coord *DataCoordMock) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if coord.checkHealthFunc != nil {
+		return coord.checkHealthFunc(ctx, req)
+	}
+	return &milvuspb.CheckHealthResponse{IsHealthy: true}, nil
+}
+
 func (coord *DataCoordMock) AssignSegmentID(ctx context.Context, req *datapb.AssignSegmentIDRequest) (*datapb.AssignSegmentIDResponse, error) {
 	panic("implement me")
 }

internal/proxy/impl.go

@@ -22,6 +22,9 @@ import (
 	"fmt"
 	"os"
 	"strconv"
+	"sync"
+
+	"golang.org/x/sync/errgroup"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
@@ -4587,3 +4590,61 @@ func (node *Proxy) SetRates(ctx context.Context, request *proxypb.SetRatesReques
 	resp.ErrorCode = commonpb.ErrorCode_Success
 	return resp, nil
 }
+
+func (node *Proxy) CheckHealth(ctx context.Context, request *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if !node.checkHealthy() {
+		reason := errorutil.UnHealthReason("proxy", node.session.ServerID, "proxy is unhealthy")
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: []string{reason}}, nil
+	}
+
+	group, ctx := errgroup.WithContext(ctx)
+	errReasons := make([]string, 0)
+
+	mu := &sync.Mutex{}
+	fn := func(role string, resp *milvuspb.CheckHealthResponse, err error) error {
+		mu.Lock()
+		defer mu.Unlock()
+
+		if err != nil {
+			log.Warn("check health fail,", zap.String("role", role), zap.Error(err))
+			errReasons = append(errReasons, fmt.Sprintf("check health fail for %s", role))
+			return err
+		}
+
+		if !resp.IsHealthy {
+			log.Warn("check health fail,", zap.String("role", role))
+			errReasons = append(errReasons, resp.Reasons...)
+		}
+		return nil
+	}
+
+	group.Go(func() error {
+		resp, err := node.rootCoord.CheckHealth(ctx, request)
+		return fn("rootcoord", resp, err)
+	})
+
+	group.Go(func() error {
+		resp, err := node.queryCoord.CheckHealth(ctx, request)
+		return fn("querycoord", resp, err)
+	})
+
+	group.Go(func() error {
+		resp, err := node.dataCoord.CheckHealth(ctx, request)
+		return fn("datacoord", resp, err)
+	})
+
+	group.Go(func() error {
+		resp, err := node.indexCoord.CheckHealth(ctx, request)
+		return fn("indexcoord", resp, err)
+	})
+
+	err := group.Wait()
+	if err != nil || len(errReasons) != 0 {
+		return &milvuspb.CheckHealthResponse{
+			IsHealthy: false,
+			Reasons:   errReasons,
+		}, nil
+	}
+
+	return &milvuspb.CheckHealthResponse{IsHealthy: true}, nil
+}

internal/proxy/impl_test.go

@@ -4,9 +4,13 @@ import (
 	"context"
 	"testing"
 
+	"github.com/pkg/errors"
+
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
+	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/proto/proxypb"
+	"github.com/milvus-io/milvus/internal/util/sessionutil"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -32,3 +36,68 @@ func TestProxy_InvalidateCollectionMetaCache_remove_stream(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, commonpb.ErrorCode_Success, status.GetErrorCode())
 }
+
+func TestProxy_CheckHealth(t *testing.T) {
+	t.Run("not healthy", func(t *testing.T) {
+		node := &Proxy{session: &sessionutil.Session{ServerID: 1}}
+		node.stateCode.Store(commonpb.StateCode_Abnormal)
+		ctx := context.Background()
+		resp, err := node.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.Equal(t, 1, len(resp.Reasons))
+	})
+
+	t.Run("proxy health check is ok", func(t *testing.T) {
+		node := &Proxy{
+			rootCoord:  NewRootCoordMock(),
+			queryCoord: NewQueryCoordMock(),
+			dataCoord:  NewDataCoordMock(),
+			indexCoord: NewIndexCoordMock(),
+			session:    &sessionutil.Session{ServerID: 1},
+		}
+		node.stateCode.Store(commonpb.StateCode_Healthy)
+		ctx := context.Background()
+		resp, err := node.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, true, resp.IsHealthy)
+		assert.Empty(t, resp.Reasons)
+	})
+
+	t.Run("proxy health check is fail", func(t *testing.T) {
+		checkHealthFunc1 := func(ctx context.Context,
+			req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+			return &milvuspb.CheckHealthResponse{
+				IsHealthy: false,
+				Reasons:   []string{"unHealth"},
+			}, nil
+		}
+
+		checkHealthFunc2 := func(ctx context.Context,
+			req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+			return nil, errors.New("test")
+		}
+
+		dataCoordMock := NewDataCoordMock()
+		dataCoordMock.checkHealthFunc = checkHealthFunc1
+
+		indexCoordMock := NewIndexCoordMock()
+		indexCoordMock.checkHealthFunc = checkHealthFunc2
+		node := &Proxy{
+			session: &sessionutil.Session{ServerID: 1},
+			rootCoord: NewRootCoordMock(func(mock *RootCoordMock) {
+				mock.checkHealthFunc = checkHealthFunc1
+			}),
+			queryCoord: NewQueryCoordMock(func(mock *QueryCoordMock) {
+				mock.checkHealthFunc = checkHealthFunc2
+			}),
+			dataCoord:  dataCoordMock,
+			indexCoord: indexCoordMock}
+		node.stateCode.Store(commonpb.StateCode_Healthy)
+		ctx := context.Background()
+		resp, err := node.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.Equal(t, 4, len(resp.Reasons))
+	})
+}

internal/proxy/index_coord_mock_test.go

@@ -48,6 +48,7 @@ type IndexCoordMock struct {
 	timeTickChannel   string
 
 	minioBucketName string
+	checkHealthFunc func(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 func (coord *IndexCoordMock) updateState(state commonpb.StateCode) {
@@ -229,6 +230,13 @@ func (coord *IndexCoordMock) GetMetrics(ctx context.Context, req *milvuspb.GetMe
 	}, nil
 }
 
+func (coord *IndexCoordMock) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if coord.checkHealthFunc != nil {
+		return coord.checkHealthFunc(ctx, req)
+	}
+	return &milvuspb.CheckHealthResponse{IsHealthy: true}, nil
+}
+
 func NewIndexCoordMock() *IndexCoordMock {
 	return &IndexCoordMock{
 		nodeID:            typeutil.UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),

internal/proxy/query_coord_mock_test.go

@@ -71,6 +71,14 @@ type QueryCoordMock struct {
 	timeTickChannel   string
 
 	validShardLeaders bool
+	checkHealthFunc   func(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
+}
+
+func (coord *QueryCoordMock) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if coord.checkHealthFunc != nil {
+		return coord.checkHealthFunc(ctx, req)
+	}
+	return &milvuspb.CheckHealthResponse{IsHealthy: true}, nil
 }
 
 func (coord *QueryCoordMock) updateState(state commonpb.StateCode) {

internal/proxy/rootcoord_mock_test.go

@@ -107,8 +107,9 @@ type RootCoordMock struct {
 
 	// TODO(dragondriver): TimeTick-related
 
-	lastTs    typeutil.Timestamp
-	lastTsMtx sync.Mutex
+	lastTs          typeutil.Timestamp
+	lastTsMtx       sync.Mutex
+	checkHealthFunc func(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 func (coord *RootCoordMock) CreateAlias(ctx context.Context, req *milvuspb.CreateAliasRequest) (*commonpb.Status, error) {
@@ -1124,6 +1125,13 @@ func (coord *RootCoordMock) AlterCollection(ctx context.Context, request *milvus
 	return &commonpb.Status{}, nil
 }
 
+func (coord *RootCoordMock) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if coord.checkHealthFunc != nil {
+		return coord.checkHealthFunc(ctx, req)
+	}
+	return &milvuspb.CheckHealthResponse{IsHealthy: true}, nil
+}
+
 type DescribeCollectionFunc func(ctx context.Context, request *milvuspb.DescribeCollectionRequest) (*milvuspb.DescribeCollectionResponse, error)
 type ShowPartitionsFunc func(ctx context.Context, request *milvuspb.ShowPartitionsRequest) (*milvuspb.ShowPartitionsResponse, error)
 type ShowSegmentsFunc func(ctx context.Context, request *milvuspb.ShowSegmentsRequest) (*milvuspb.ShowSegmentsResponse, error)
@@ -1191,6 +1199,12 @@ func (m *mockRootCoord) ListPolicy(ctx context.Context, in *internalpb.ListPolic
 	return &internalpb.ListPolicyResponse{}, nil
 }
 
+func (m *mockRootCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
+
 func newMockRootCoord() *mockRootCoord {
 	return &mockRootCoord{}
 }

internal/querycoordv2/services.go

@@ -20,6 +20,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"sync"
+
+	"github.com/milvus-io/milvus/internal/util/errorutil"
+
+	"golang.org/x/sync/errgroup"
 
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
@@ -702,3 +707,35 @@ func (s *Server) GetShardLeaders(ctx context.Context, req *querypb.GetShardLeade
 	}
 	return resp, nil
 }
+
+func (s *Server) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if s.status.Load() != commonpb.StateCode_Healthy {
+		reason := errorutil.UnHealthReason("querycoord", s.session.ServerID, "querycoord is unhealthy")
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: []string{reason}}, nil
+	}
+
+	group, ctx := errgroup.WithContext(ctx)
+	errReasons := make([]string, 0, len(s.nodeMgr.GetAll()))
+
+	mu := &sync.Mutex{}
+	for _, node := range s.nodeMgr.GetAll() {
+		node := node
+		group.Go(func() error {
+			resp, err := s.cluster.GetComponentStates(ctx, node.ID())
+			isHealthy, reason := errorutil.UnHealthReasonWithComponentStatesOrErr("querynode", node.ID(), resp, err)
+			if !isHealthy {
+				mu.Lock()
+				defer mu.Unlock()
+				errReasons = append(errReasons, reason)
+			}
+			return err
+		})
+	}
+
+	err := group.Wait()
+	if err != nil || len(errReasons) != 0 {
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: errReasons}, nil
+	}
+
+	return &milvuspb.CheckHealthResponse{IsHealthy: true, Reasons: errReasons}, nil
+}

internal/querycoordv2/services_test.go

@@ -780,6 +780,47 @@ func (suite *ServiceSuite) TestGetReplicas() {
 	suite.Contains(resp.Status.Reason, ErrNotHealthy.Error())
 }
 
+func (suite *ServiceSuite) TestCheckHealth() {
+	ctx := context.Background()
+	server := suite.server
+
+	// Test for server is not healthy
+	server.UpdateStateCode(commonpb.StateCode_Initializing)
+	resp, err := server.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+	suite.NoError(err)
+	suite.Equal(resp.IsHealthy, false)
+	suite.NotEmpty(resp.Reasons)
+
+	// Test for components state fail
+	for _, node := range suite.nodes {
+		suite.cluster.EXPECT().GetComponentStates(mock.Anything, node).Return(
+			&milvuspb.ComponentStates{
+				State:  &milvuspb.ComponentInfo{StateCode: commonpb.StateCode_Abnormal},
+				Status: &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
+			},
+			nil).Once()
+	}
+	server.UpdateStateCode(commonpb.StateCode_Healthy)
+	resp, err = server.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+	suite.NoError(err)
+	suite.Equal(resp.IsHealthy, false)
+	suite.NotEmpty(resp.Reasons)
+
+	// Test for server is healthy
+	for _, node := range suite.nodes {
+		suite.cluster.EXPECT().GetComponentStates(mock.Anything, node).Return(
+			&milvuspb.ComponentStates{
+				State:  &milvuspb.ComponentInfo{StateCode: commonpb.StateCode_Healthy},
+				Status: &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
+			},
+			nil).Once()
+	}
+	resp, err = server.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+	suite.NoError(err)
+	suite.Equal(resp.IsHealthy, true)
+	suite.Empty(resp.Reasons)
+}
+
 func (suite *ServiceSuite) TestGetShardLeaders() {
 	suite.loadAll()
 	ctx := context.Background()

internal/querycoordv2/session/cluster.go

@@ -54,6 +54,7 @@ type Cluster interface {
 	GetDataDistribution(ctx context.Context, nodeID int64, req *querypb.GetDataDistributionRequest) (*querypb.GetDataDistributionResponse, error)
 	GetMetrics(ctx context.Context, nodeID int64, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error)
 	SyncDistribution(ctx context.Context, nodeID int64, req *querypb.SyncDistributionRequest) (*commonpb.Status, error)
+	GetComponentStates(ctx context.Context, nodeID int64) (*milvuspb.ComponentStates, error)
 	Start(ctx context.Context)
 	Stop()
 }
@@ -207,6 +208,22 @@ func (c *QueryCluster) SyncDistribution(ctx context.Context, nodeID int64, req *
 	return resp, err
 }
 
+func (c *QueryCluster) GetComponentStates(ctx context.Context, nodeID int64) (*milvuspb.ComponentStates, error) {
+	var (
+		resp *milvuspb.ComponentStates
+		err  error
+	)
+
+	err1 := c.send(ctx, nodeID, func(cli *grpcquerynodeclient.Client) {
+		resp, err = cli.GetComponentStates(ctx)
+	})
+
+	if err1 != nil {
+		return nil, err1
+	}
+	return resp, err
+}
+
 func (c *QueryCluster) send(ctx context.Context, nodeID int64, fn func(cli *grpcquerynodeclient.Client)) error {
 	node := c.nodeManager.Get(nodeID)
 	if node == nil {

internal/querycoordv2/session/cluster_test.go

@@ -134,6 +134,13 @@ func (suite *ClusterTestSuite) createDefaultMockServer() querypb.QueryNodeServer
 		mock.Anything,
 		mock.AnythingOfType("*querypb.SyncDistributionRequest"),
 	).Maybe().Return(succStatus, nil)
+	svr.EXPECT().GetComponentStates(
+		mock.Anything,
+		mock.AnythingOfType("*milvuspb.GetComponentStatesRequest"),
+	).Maybe().Return(&milvuspb.ComponentStates{
+		State:  &milvuspb.ComponentInfo{StateCode: commonpb.StateCode_Healthy},
+		Status: &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
+	}, nil)
 	return svr
 }
 
@@ -172,6 +179,13 @@ func (suite *ClusterTestSuite) createFailedMockServer() querypb.QueryNodeServer
 		mock.Anything,
 		mock.AnythingOfType("*querypb.SyncDistributionRequest"),
 	).Maybe().Return(failStatus, nil)
+	svr.EXPECT().GetComponentStates(
+		mock.Anything,
+		mock.AnythingOfType("*milvuspb.GetComponentStatesRequest"),
+	).Maybe().Return(&milvuspb.ComponentStates{
+		State:  &milvuspb.ComponentInfo{StateCode: commonpb.StateCode_Abnormal},
+		Status: &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
+	}, nil)
 	return svr
 }
 
@@ -328,6 +342,17 @@ func (suite *ClusterTestSuite) TestSyncDistribution() {
 	}, status)
 }
 
+func (suite *ClusterTestSuite) TestGetComponentStates() {
+	ctx := context.TODO()
+	status, err := suite.cluster.GetComponentStates(ctx, 0)
+	suite.NoError(err)
+	suite.Equal(status.State.GetStateCode(), commonpb.StateCode_Healthy)
+
+	status, err = suite.cluster.GetComponentStates(ctx, 1)
+	suite.NoError(err)
+	suite.Equal(status.State.GetStateCode(), commonpb.StateCode_Abnormal)
+}
+
 func TestClusterSuite(t *testing.T) {
 	suite.Run(t, new(ClusterTestSuite))
 }

internal/querycoordv2/session/mock_cluster.go

@@ -27,6 +27,53 @@ func (_m *MockCluster) EXPECT() *MockCluster_Expecter {
 	return &MockCluster_Expecter{mock: &_m.Mock}
 }
 
+// GetComponentStates provides a mock function with given fields: ctx, nodeID
+func (_m *MockCluster) GetComponentStates(ctx context.Context, nodeID int64) (*milvuspb.ComponentStates, error) {
+	ret := _m.Called(ctx, nodeID)
+
+	var r0 *milvuspb.ComponentStates
+	if rf, ok := ret.Get(0).(func(context.Context, int64) *milvuspb.ComponentStates); ok {
+		r0 = rf(ctx, nodeID)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*milvuspb.ComponentStates)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, int64) error); ok {
+		r1 = rf(ctx, nodeID)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockCluster_GetComponentStates_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetComponentStates'
+type MockCluster_GetComponentStates_Call struct {
+	*mock.Call
+}
+
+// GetComponentStates is a helper method to define mock.On call
+//  - ctx context.Context
+//  - nodeID int64
+func (_e *MockCluster_Expecter) GetComponentStates(ctx interface{}, nodeID interface{}) *MockCluster_GetComponentStates_Call {
+	return &MockCluster_GetComponentStates_Call{Call: _e.mock.On("GetComponentStates", ctx, nodeID)}
+}
+
+func (_c *MockCluster_GetComponentStates_Call) Run(run func(ctx context.Context, nodeID int64)) *MockCluster_GetComponentStates_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(int64))
+	})
+	return _c
+}
+
+func (_c *MockCluster_GetComponentStates_Call) Return(_a0 *milvuspb.ComponentStates, _a1 error) *MockCluster_GetComponentStates_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
 // GetDataDistribution provides a mock function with given fields: ctx, nodeID, req
 func (_m *MockCluster) GetDataDistribution(ctx context.Context, nodeID int64, req *querypb.GetDataDistributionRequest) (*querypb.GetDataDistributionResponse, error) {
 	ret := _m.Called(ctx, nodeID, req)

internal/rootcoord/mock_test.go

@@ -202,6 +202,12 @@ func (m *mockDataCoord) BroadcastAlteredCollection(ctx context.Context, req *mil
 	return m.broadCastAlteredCollectionFunc(ctx, req)
 }
 
+func (m *mockDataCoord) CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{
+		IsHealthy: true,
+	}, nil
+}
+
 type mockQueryCoord struct {
 	types.QueryCoord
 	GetSegmentInfoFunc     func(ctx context.Context, req *querypb.GetSegmentInfoRequest) (*querypb.GetSegmentInfoResponse, error)
@@ -260,6 +266,7 @@ type mockProxy struct {
 	InvalidateCollectionMetaCacheFunc func(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error)
 	InvalidateCredentialCacheFunc     func(ctx context.Context, request *proxypb.InvalidateCredCacheRequest) (*commonpb.Status, error)
 	RefreshPolicyInfoCacheFunc        func(ctx context.Context, request *proxypb.RefreshPolicyInfoCacheRequest) (*commonpb.Status, error)
+	GetComponentStatesFunc            func(ctx context.Context) (*milvuspb.ComponentStates, error)
 }
 
 func (m mockProxy) InvalidateCollectionMetaCache(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error) {
@@ -274,6 +281,10 @@ func (m mockProxy) RefreshPolicyInfoCache(ctx context.Context, request *proxypb.
 	return m.RefreshPolicyInfoCacheFunc(ctx, request)
 }
 
+func (m mockProxy) GetComponentStates(ctx context.Context) (*milvuspb.ComponentStates, error) {
+	return m.GetComponentStatesFunc(ctx)
+}
+
 func newMockProxy() *mockProxy {
 	r := &mockProxy{}
 	r.InvalidateCollectionMetaCacheFunc = func(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error) {
@@ -307,6 +318,13 @@ func withValidProxyManager() Opt {
 		p.InvalidateCollectionMetaCacheFunc = func(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error) {
 			return succStatus(), nil
 		}
+		p.GetComponentStatesFunc = func(ctx context.Context) (*milvuspb.ComponentStates, error) {
+			return &milvuspb.ComponentStates{
+				State:  &milvuspb.ComponentInfo{StateCode: commonpb.StateCode_Healthy},
+				Status: &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
+			}, nil
+		}
+		c.proxyClientManager.proxyClient[TestProxyID] = p
 	}
 }
 
@@ -319,6 +337,12 @@ func withInvalidProxyManager() Opt {
 		p.InvalidateCollectionMetaCacheFunc = func(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error) {
 			return succStatus(), errors.New("error mock InvalidateCollectionMetaCache")
 		}
+		p.GetComponentStatesFunc = func(ctx context.Context) (*milvuspb.ComponentStates, error) {
+			return &milvuspb.ComponentStates{
+				State:  &milvuspb.ComponentInfo{StateCode: commonpb.StateCode_Abnormal},
+				Status: &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
+			}, nil
+		}
 		c.proxyClientManager.proxyClient[TestProxyID] = p
 	}
 }

internal/rootcoord/root_coord.go

@@ -27,6 +27,8 @@ import (
 	"syscall"
 	"time"
 
+	"golang.org/x/sync/errgroup"
+
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
@@ -2351,3 +2353,36 @@ func (c *Core) ListPolicy(ctx context.Context, in *internalpb.ListPolicyRequest)
 		UserRoles:   userRoles,
 	}, nil
 }
+
+func (c *Core) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error) {
+	if _, ok := c.checkHealthy(); !ok {
+		reason := errorutil.UnHealthReason("rootcoord", c.session.ServerID, "rootcoord is unhealthy")
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: []string{reason}}, nil
+	}
+
+	mu := &sync.Mutex{}
+	group, ctx := errgroup.WithContext(ctx)
+	errReasons := make([]string, 0, len(c.proxyClientManager.proxyClient))
+
+	for nodeID, proxyClient := range c.proxyClientManager.proxyClient {
+		nodeID := nodeID
+		proxyClient := proxyClient
+		group.Go(func() error {
+			sta, err := proxyClient.GetComponentStates(ctx)
+			isHealthy, reason := errorutil.UnHealthReasonWithComponentStatesOrErr("proxy", nodeID, sta, err)
+			if !isHealthy {
+				mu.Lock()
+				defer mu.Unlock()
+				errReasons = append(errReasons, reason)
+			}
+			return err
+		})
+	}
+
+	err := group.Wait()
+	if err != nil || len(errReasons) != 0 {
+		return &milvuspb.CheckHealthResponse{IsHealthy: false, Reasons: errReasons}, nil
+	}
+
+	return &milvuspb.CheckHealthResponse{IsHealthy: true, Reasons: errReasons}, nil
+}

internal/rootcoord/root_coord_test.go

@@ -1416,3 +1416,36 @@ func TestRootCoord_AlterCollection(t *testing.T) {
 		assert.Equal(t, commonpb.ErrorCode_Success, resp.GetErrorCode())
 	})
 }
+
+func TestRootCoord_CheckHealth(t *testing.T) {
+	t.Run("not healthy", func(t *testing.T) {
+		ctx := context.Background()
+		c := newTestCore(withAbnormalCode())
+		resp, err := c.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.NotEmpty(t, resp.Reasons)
+	})
+
+	t.Run("proxy health check is ok", func(t *testing.T) {
+		c := newTestCore(withHealthyCode(),
+			withValidProxyManager())
+
+		ctx := context.Background()
+		resp, err := c.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, true, resp.IsHealthy)
+		assert.Empty(t, resp.Reasons)
+	})
+
+	t.Run("proxy health check is fail", func(t *testing.T) {
+		c := newTestCore(withHealthyCode(),
+			withInvalidProxyManager())
+
+		ctx := context.Background()
+		resp, err := c.CheckHealth(ctx, &milvuspb.CheckHealthRequest{})
+		assert.NoError(t, err)
+		assert.Equal(t, false, resp.IsHealthy)
+		assert.NotEmpty(t, resp.Reasons)
+	})
+}

internal/types/types.go

@@ -326,6 +326,8 @@ type DataCoord interface {
 	MarkSegmentsDropped(ctx context.Context, req *datapb.MarkSegmentsDroppedRequest) (*commonpb.Status, error)
 
 	BroadcastAlteredCollection(ctx context.Context, req *milvuspb.AlterCollectionRequest) (*commonpb.Status, error)
+
+	CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // DataCoordComponent defines the interface of DataCoord component.
@@ -424,6 +426,8 @@ type IndexCoord interface {
 
 	// GetMetrics gets the metrics about IndexCoord.
 	GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error)
+
+	CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // IndexCoordComponent is used by grpc server of IndexCoord
@@ -763,6 +767,8 @@ type RootCoord interface {
 	OperatePrivilege(ctx context.Context, req *milvuspb.OperatePrivilegeRequest) (*commonpb.Status, error)
 	SelectGrant(ctx context.Context, req *milvuspb.SelectGrantRequest) (*milvuspb.SelectGrantResponse, error)
 	ListPolicy(ctx context.Context, in *internalpb.ListPolicyRequest) (*internalpb.ListPolicyResponse, error)
+
+	CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // RootCoordComponent is used by grpc server of RootCoord
@@ -1287,6 +1293,8 @@ type ProxyComponent interface {
 	SelectUser(ctx context.Context, req *milvuspb.SelectUserRequest) (*milvuspb.SelectUserResponse, error)
 	OperatePrivilege(ctx context.Context, req *milvuspb.OperatePrivilegeRequest) (*commonpb.Status, error)
 	SelectGrant(ctx context.Context, req *milvuspb.SelectGrantRequest) (*milvuspb.SelectGrantResponse, error)
+
+	CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // QueryNode is the interface `querynode` package implements
@@ -1354,6 +1362,8 @@ type QueryCoord interface {
 
 	GetReplicas(ctx context.Context, req *milvuspb.GetReplicasRequest) (*milvuspb.GetReplicasResponse, error)
 	GetShardLeaders(ctx context.Context, req *querypb.GetShardLeadersRequest) (*querypb.GetShardLeadersResponse, error)
+
+	CheckHealth(ctx context.Context, req *milvuspb.CheckHealthRequest) (*milvuspb.CheckHealthResponse, error)
 }
 
 // QueryCoordComponent is used by grpc server of QueryCoord

internal/util/errorutil/util.go

@@ -6,6 +6,8 @@ import (
 	"strings"
 
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
+	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
+	"github.com/milvus-io/milvus/internal/util/typeutil"
 )
 
 // ErrorList for print error log
@@ -43,3 +45,23 @@ func UnhealthyError() error {
 func PermissionDenyError() error {
 	return errors.New("permission deny")
 }
+
+func UnHealthReason(role string, nodeID typeutil.UniqueID, reason string) string {
+	return fmt.Sprintf("role %s[nodeID: %d] is unhealthy, reason: %s", role, nodeID, reason)
+}
+
+func UnHealthReasonWithComponentStatesOrErr(role string, nodeID typeutil.UniqueID, cs *milvuspb.ComponentStates, err error) (bool, string) {
+	if err != nil {
+		return false, UnHealthReason(role, nodeID, fmt.Sprintf("inner error: %s", err.Error()))
+	}
+
+	if cs != nil && cs.GetStatus().GetErrorCode() != commonpb.ErrorCode_Success {
+		return false, UnHealthReason(role, nodeID, fmt.Sprintf("rpc status error: %d", cs.GetStatus().GetErrorCode()))
+	}
+
+	if cs != nil && cs.GetState().GetStateCode() != commonpb.StateCode_Healthy {
+		return false, UnHealthReason(role, nodeID, fmt.Sprintf("node is unhealthy, state code: %d", cs.GetState().GetStateCode()))
+	}
+
+	return true, ""
+}

internal/util/mock/grpc_datacoord_client.go

@@ -34,6 +34,10 @@ type GrpcDataCoordClient struct {
 	Err error
 }
 
+func (m *GrpcDataCoordClient) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{}, m.Err
+}
+
 func (m *GrpcDataCoordClient) GetComponentStates(ctx context.Context, in *milvuspb.GetComponentStatesRequest, opts ...grpc.CallOption) (*milvuspb.ComponentStates, error) {
 	return &milvuspb.ComponentStates{}, m.Err
 }

internal/util/mock/grpc_querycoord_client.go

@@ -34,6 +34,10 @@ type GrpcQueryCoordClient struct {
 	Err error
 }
 
+func (m *GrpcQueryCoordClient) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{}, m.Err
+}
+
 func (m *GrpcQueryCoordClient) GetComponentStates(ctx context.Context, in *milvuspb.GetComponentStatesRequest, opts ...grpc.CallOption) (*milvuspb.ComponentStates, error) {
 	return &milvuspb.ComponentStates{}, m.Err
 }

internal/util/mock/grpc_rootcoord_client.go

@@ -35,6 +35,10 @@ type GrpcRootCoordClient struct {
 	Err error
 }
 
+func (m *GrpcRootCoordClient) CheckHealth(ctx context.Context, in *milvuspb.CheckHealthRequest, opts ...grpc.CallOption) (*milvuspb.CheckHealthResponse, error) {
+	return &milvuspb.CheckHealthResponse{}, m.Err
+}
+
 func (m *GrpcRootCoordClient) CreateRole(ctx context.Context, in *milvuspb.CreateRoleRequest, opts ...grpc.CallOption) (*commonpb.Status, error) {
 	return &commonpb.Status{}, m.Err
 }