Add a delay time before delete the connection in the access log module (

#155)

CHANGES.md

@@ -6,6 +6,7 @@ Release Notes.
 ------------------
 #### Features
 * Separate multiple process for reading connection information in the access log module.
+* Add a delay time before delete the connection in the access log module.
 
 #### Bug Fixes
 * Fix the base image cannot run in the arm64.

pkg/accesslog/collector/connect.go

@@ -74,7 +74,7 @@ func (c *ConnectCollector) Start(_ *module.Manager, ctx *common.AccessLogContext
 	if err != nil {
 		connectLogger.Warnf("cannot create the connection tracker, %v", err)
 	}
-	c.eventQueue = btf.NewEventQueue(ctx.Config.ConnectionAnalyze.Parallels, ctx.Config.ConnectionAnalyze.QueueSize, func() btf.PartitionContext {
+	c.eventQueue = btf.NewEventQueue(ctx.Config.ConnectionAnalyze.Parallels, ctx.Config.ConnectionAnalyze.QueueSize, func(num int) btf.PartitionContext {
 		return newConnectionPartitionContext(ctx, track)
 	})
 	c.eventQueue.RegisterReceiver(ctx.BPF.SocketConnectionEventQueue, int(perCPUBufferSize), func() interface{} {

pkg/accesslog/collector/protocols/http1.go

@@ -150,7 +150,8 @@ func (p *HTTP1Protocol) handleHTTPData(metrics *HTTP1Metrics, request *reader.Re
 	detailEvents = appendSocketDetailsFromBuffer(detailEvents, response.BodyBuffer())
 
 	if len(detailEvents) == 0 {
-		http1Log.Warnf("cannot found any detail events for HTTP/1.x protocol, data id: %d-%d",
+		http1Log.Warnf("cannot found any detail events for HTTP/1.x protocol, connection ID: %d, random ID: %d, data id: %d-%d",
+			metrics.connectionID, metrics.randomID,
 			request.MinDataID(), response.BodyBuffer().LastSocketBuffer().DataID())
 		return
 	}

pkg/accesslog/collector/protocols/queue.go

@@ -70,8 +70,8 @@ func NewAnalyzeQueue(ctx *common.AccessLogContext) (*AnalyzeQueue, error) {
 	return &AnalyzeQueue{
 		context:      ctx,
 		perCPUBuffer: perCPUBufferSize,
-		eventQueue: btf.NewEventQueue(ctx.Config.ProtocolAnalyze.Parallels, ctx.Config.ProtocolAnalyze.QueueSize, func() btf.PartitionContext {
-			return NewPartitionContext(ctx)
+		eventQueue: btf.NewEventQueue(ctx.Config.ProtocolAnalyze.Parallels, ctx.Config.ProtocolAnalyze.QueueSize, func(num int) btf.PartitionContext {
+			return NewPartitionContext(ctx, num)
 		}),
 		detailSupplier: func() events.SocketDetail {
 			return &events.SocketDetailEvent{}
@@ -99,9 +99,10 @@ func (q *AnalyzeQueue) ChangeDetailSupplier(supplier func() events.SocketDetail)
 }
 
 type PartitionContext struct {
-	context     *common.AccessLogContext
-	protocolMgr *ProtocolManager
-	connections cmap.ConcurrentMap
+	context      *common.AccessLogContext
+	protocolMgr  *ProtocolManager
+	connections  cmap.ConcurrentMap
+	partitionNum int
 
 	analyzeLocker sync.Mutex
 }
@@ -118,11 +119,12 @@ func newPartitionConnection(protocolMgr *ProtocolManager, conID, randomID uint64
 	}
 }
 
-func NewPartitionContext(ctx *common.AccessLogContext) *PartitionContext {
+func NewPartitionContext(ctx *common.AccessLogContext, num int) *PartitionContext {
 	pc := &PartitionContext{
-		context:     ctx,
-		protocolMgr: NewProtocolManager(ctx),
-		connections: cmap.New(),
+		context:      ctx,
+		protocolMgr:  NewProtocolManager(ctx),
+		connections:  cmap.New(),
+		partitionNum: num,
 	}
 	ctx.ConnectionMgr.RegisterProcessor(pc)
 	return pc
@@ -131,12 +133,16 @@ func NewPartitionContext(ctx *common.AccessLogContext) *PartitionContext {
 func (p *PartitionContext) OnConnectionClose(event *events.SocketCloseEvent, closeCallback common.ConnectionProcessFinishCallback) {
 	conn, exist := p.connections.Get(p.buildConnectionKey(event.GetConnectionID(), event.GetRandomID()))
 	if !exist {
+		log.Debugf("connection is not exist in the partion context, connection ID: %d, random ID: %d, partition number: %d",
+			event.GetConnectionID(), event.GetRandomID(), p.partitionNum)
 		closeCallback()
 		return
 	}
 	connection := conn.(*PartitionConnection)
 	connection.closeCallback = closeCallback
 	connection.closed = true
+	log.Debugf("receive the connection close event and mark is closable, connection ID: %d, random ID: %d, partition number: %d",
+		event.GetConnectionID(), event.GetRandomID(), p.partitionNum)
 }
 
 func (p *PartitionContext) Start(ctx context.Context) {
@@ -236,6 +242,8 @@ func (p *PartitionContext) processEvents() {
 				info.closeCallback()
 			}
 			closedConnections = append(closedConnections, conKey)
+			log.Debugf("detect the connection is already closed, then notify to the callback, connection ID: %d, random ID: %d, partition number: %d",
+				info.connectionID, info.randomID, p.partitionNum)
 		}
 	})
 

pkg/accesslog/common/connection.go

@@ -54,6 +54,9 @@ const (
 
 	// clean the active connection in BPF interval
 	cleanActiveConnectionInterval = time.Second * 20
+
+	// in case the reading the data from BPF queue is disordered, so add a delay time to delete the connection information
+	connectionDeleteDelayTime = time.Second * 20
 )
 
 type addressProcessType int
@@ -147,6 +150,7 @@ type ConnectionInfo struct {
 	MarkDeletable bool
 	PID           uint32
 	Socket        *ip.SocketPair
+	DeleteAfter   *time.Time
 }
 
 func NewConnectionManager(config *Config, moduleMgr *module.Manager, bpfLoader *bpf.Loader, filter MonitorFilter) *ConnectionManager {
@@ -620,6 +624,7 @@ func (c *ConnectionManager) OnBuildConnectionLogFinished() {
 	// delete all connections which marked as deletable
 	// all deletable connection events been sent
 	deletableConnections := make(map[string]bool, 0)
+	now := time.Now()
 	c.connections.IterCb(func(key string, v interface{}) {
 		con, ok := v.(*ConnectionInfo)
 		if !ok || con == nil {
@@ -628,7 +633,14 @@ func (c *ConnectionManager) OnBuildConnectionLogFinished() {
 		// already mark as deletable or process not monitoring
 		shouldDelete := con.MarkDeletable || !c.ProcessIsMonitor(con.PID)
 
-		if shouldDelete {
+		if shouldDelete && con.DeleteAfter == nil {
+			deleteAfterTime := now.Add(connectionDeleteDelayTime)
+			con.DeleteAfter = &deleteAfterTime
+			log.Debugf("detected the connection has mark as deletable, so add a delay timer, connection ID: %d, random ID: %d",
+				con.ConnectionID, con.RandomID)
+		}
+
+		if shouldDelete && now.After(*con.DeleteAfter) {
 			deletableConnections[key] = true
 		}
 	})

pkg/profiling/task/network/analyze/layer7/events.go

@@ -29,7 +29,7 @@ import (
 )
 
 func (l *Listener) initSocketDataQueue(parallels, queueSize int, config *profiling.TaskConfig) {
-	l.socketDataQueue = btf.NewEventQueue(parallels, queueSize, func() btf.PartitionContext {
+	l.socketDataQueue = btf.NewEventQueue(parallels, queueSize, func(num int) btf.PartitionContext {
 		return NewSocketDataPartitionContext(l, config)
 	})
 }

pkg/tools/btf/queue.go

@@ -45,10 +45,10 @@ type mapReceiver struct {
 	router       func(data interface{}) string
 }
 
-func NewEventQueue(partitionCount, sizePerPartition int, contextGenerator func() PartitionContext) *EventQueue {
+func NewEventQueue(partitionCount, sizePerPartition int, contextGenerator func(partitionNum int) PartitionContext) *EventQueue {
 	partitions := make([]*partition, 0)
 	for i := 0; i < partitionCount; i++ {
-		partitions = append(partitions, newPartition(i, sizePerPartition, contextGenerator()))
+		partitions = append(partitions, newPartition(i, sizePerPartition, contextGenerator(i)))
 	}
 	return &EventQueue{count: partitionCount, partitions: partitions}
 }

test/e2e/cases/profiling/task/network/http2/go.sum

@@ -0,0 +1,106 @@
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