fix: allow datanode's server id to be updated

internal/datacoord/server.go

@@ -466,6 +466,13 @@
 	sessionutil.SaveServerInfo(typeutil.DataCoordRole, s.session.GetServerID())
 }
 
+func (s *Server) GetServerID() int64 {
+	if s.session != nil {
+		return s.session.GetServerID()
+	}
+	return paramtable.GetNodeID()
+}
+
 func (s *Server) afterStart() {}
 
 func (s *Server) initCluster() error {

internal/datanode/data_node.go

@@ -83,7 +83,6 @@ var Params *paramtable.ComponentParam = paramtable.Get()
 //	`segmentCache` stores all flushing and flushed segments.
 type DataNode struct {
 	ctx              context.Context
-	serverID         int64
 	cancel           context.CancelFunc
 	Role             string
 	stateCode        atomic.Value // commonpb.StateCode_Initializing
@@ -129,7 +128,7 @@ type DataNode struct {
 }
 
 // NewDataNode will return a DataNode with abnormal state.
-func NewDataNode(ctx context.Context, factory dependency.Factory, serverID int64) *DataNode {
+func NewDataNode(ctx context.Context, factory dependency.Factory) *DataNode {
 	rand.Seed(time.Now().UnixNano())
 	ctx2, cancel2 := context.WithCancel(ctx)
 	node := &DataNode{
@@ -140,7 +139,6 @@ func NewDataNode(ctx context.Context, factory dependency.Factory, serverID int64
 		rootCoord:          nil,
 		dataCoord:          nil,
 		factory:            factory,
-		serverID:           serverID,
 		segmentCache:       newCache(),
 		compactionExecutor: newCompactionExecutor(),
 
@@ -228,10 +226,10 @@ func (node *DataNode) initRateCollector() error {
 }
 
 func (node *DataNode) GetNodeID() int64 {
-	if node.serverID == 0 && node.session != nil {
+	if node.session != nil {
 		return node.session.ServerID
 	}
-	return node.serverID
+	return paramtable.GetNodeID()
 }
 
 func (node *DataNode) Init() error {
@@ -246,7 +244,7 @@ func (node *DataNode) Init() error {
 			return
 		}
 
-		serverID := node.session.ServerID
+		serverID := node.GetNodeID()
 		log := log.Ctx(node.ctx).With(zap.String("role", typeutil.DataNodeRole), zap.Int64("nodeID", serverID))
 
 		node.broker = broker.NewCoordBroker(node.rootCoord, node.dataCoord, serverID)

internal/datanode/event_manager.go

@@ -92,7 +92,7 @@ func (node *DataNode) StartWatchChannels(ctx context.Context) {
 // serves the corner case for etcd connection lost and missing some events
 func (node *DataNode) checkWatchedList() error {
 	// REF MEP#7 watch path should be [prefix]/channel/{node_id}/{channel_name}
-	prefix := path.Join(Params.CommonCfg.DataCoordWatchSubPath.GetValue(), fmt.Sprintf("%d", node.serverID))
+	prefix := path.Join(Params.CommonCfg.DataCoordWatchSubPath.GetValue(), fmt.Sprintf("%d", node.GetNodeID()))
 	keys, values, err := node.watchKv.LoadWithPrefix(prefix)
 	if err != nil {
 		return err

internal/datanode/mock_test.go

@@ -83,7 +83,7 @@ var segID2SegInfo = map[int64]*datapb.SegmentInfo{
 
 func newIDLEDataNodeMock(ctx context.Context, pkType schemapb.DataType) *DataNode {
 	factory := dependency.NewDefaultFactory(true)
-	node := NewDataNode(ctx, factory, 1)
+	node := NewDataNode(ctx, factory)
 	node.SetSession(&sessionutil.Session{SessionRaw: sessionutil.SessionRaw{ServerID: 1}})
 	node.dispClient = msgdispatcher.NewClient(factory, typeutil.DataNodeRole, paramtable.GetNodeID())
 

internal/distributed/datacoord/service.go

@@ -180,7 +180,7 @@
 			interceptor.ClusterValidationUnaryServerInterceptor(),
 			interceptor.ServerIDValidationUnaryServerInterceptor(func() int64 {
 				if s.serverID.Load() == 0 {
-					s.serverID.Store(paramtable.GetNodeID())
+					s.serverID.Store(s.dataCoord.(*datacoord.Server).GetServerID())
 				}
 				return s.serverID.Load()
 			}),
@@ -191,7 +191,7 @@
 			interceptor.ClusterValidationStreamServerInterceptor(),
 			interceptor.ServerIDValidationStreamServerInterceptor(func() int64 {
 				if s.serverID.Load() == 0 {
-					s.serverID.Store(paramtable.GetNodeID())
+					s.serverID.Store(s.dataCoord.(*datacoord.Server).GetServerID())
 				}
 				return s.serverID.Load()
 			}),

internal/distributed/datanode/service.go

@@ -91,7 +91,7 @@ func NewServer(ctx context.Context, factory dependency.Factory) (*Server, error)
 	}
 
 	s.serverID.Store(paramtable.GetNodeID())
-	s.datanode = dn.NewDataNode(s.ctx, s.factory, s.serverID.Load())
+	s.datanode = dn.NewDataNode(s.ctx, s.factory)
 	return s, nil
 }