Bug fix

1. fix potential concurrent problem
2. wait a period of time after the exit of processloop to avoid recreation problem

Author: YLonely

go.mod

@@ -15,11 +15,15 @@ require (
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0-rc1 // indirect
 	github.com/opencontainers/image-spec v1.0.1 // indirect
+	github.com/prometheus/client_golang v1.2.1 // indirect
 	github.com/sirupsen/logrus v1.4.2
 	github.com/urfave/cli v1.22.1
+	golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3 // indirect
 	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
+	golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135 // indirect
 	google.golang.org/grpc v1.25.0 // indirect
 	gotest.tools v2.2.0+incompatible // indirect
+	honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc // indirect
 )
 
 replace github.com/docker/docker v1.13.1 => github.com/docker/engine v0.0.0-20190822205725-ed20165a37b4

go.sum

@@ -4,7 +4,17 @@ github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX
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@@ -26,6 +36,12 @@ github.com/gin-contrib/sse v0.0.0-20190301062529-5545eab6dad3 h1:t8FVkw33L+wilf2
 github.com/gin-contrib/sse v0.0.0-20190301062529-5545eab6dad3/go.mod h1:VJ0WA2NBN22VlZ2dKZQPAPnyWw5XTlK1KymzLKsr59s=
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+github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
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+github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
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@@ -38,35 +54,61 @@ github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs
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@@ -79,30 +121,36 @@ github.com/ugorji/go v1.1.4 h1:j4s+tAvLfL3bZyefP2SEWmhBzmuIlH/eqNuPdFPgngw=
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 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b h1:ag/x1USPSsqHud38I9BAC88qdNLDHHtQ4mlgQIZPPNA=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0 h1:/5xXl8Y5W96D+TtHSlonuFqGHIWVuyCkGJLwGh9JJFs=
@@ -121,12 +169,14 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.0 h1:ItERT+UbGdX+s4u+nQNlVM/Q7cbmf7icKfvzbWqVtq0=
 google.golang.org/grpc v1.25.0/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/go-playground/assert.v1 v1.2.1 h1:xoYuJVE7KT85PYWrN730RguIQO0ePzVRfFMXadIrXTM=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v8 v8.18.2 h1:lFB4DoMU6B626w8ny76MV7VX6W2VHct2GVOI3xgiMrQ=
 gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/RRjR0eouCJSH80/M2Y=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=

server/controller/container/container.go

@@ -3,6 +3,7 @@ package container
 import (
 	"context"
 	"sync"
+	"time"
 
 	"github.com/YLonely/sysdig-monitor/log"
 	"github.com/YLonely/sysdig-monitor/server/controller"
@@ -36,6 +37,8 @@ type mutexContainer struct {
 	*model.Container
 }
 
+const containerKeepingPeriod = time.Millisecond * 50
+
 func newMutexContainer(id, name string, containerJSON *types.ContainerJSON) (*mutexContainer, error) {
 	c, err := model.NewContainer(id, name, containerJSON.GraphDriver.Data)
 	if err != nil {
@@ -87,7 +90,11 @@ func (cc *ContainerController) initRouter() {
 
 func (cc *ContainerController) start(ctx context.Context) error {
 	go func() {
-		var e sysdig.Event
+		var (
+			e      sysdig.Event
+			ch     chan containerEvent
+			exists bool
+		)
 		for {
 			select {
 			case e = <-cc.ec:
@@ -104,7 +111,13 @@ func (cc *ContainerController) start(ctx context.Context) error {
 				containerName = unknownContainerName
 			}
 			log.L.Debug(ce)
-			if _, exists := cc.containers[containerID]; !exists {
+			cc.cm.RLock()
+			ch, exists = cc.containerCh[containerID]
+			if exists {
+				ch <- ce
+			}
+			cc.cm.RUnlock()
+			if !exists {
 				containerJSON, err := cc.containerJSON(ctx, containerID)
 				if err != nil {
 					log.L.WithError(err).WithField("container-id", containerID).Error("cant fetch container json")
@@ -118,24 +131,10 @@ func (cc *ContainerController) start(ctx context.Context) error {
 				ch := make(chan containerEvent, eventBufferLen)
 				cc.cm.Lock()
 				cc.containers[containerID] = container
-				cc.cm.Unlock()
 				cc.containerCh[containerID] = ch
-				go func() {
-					log.L.WithField("container-id", containerID).Info("processLoop start")
-					err := processLoop(ctx, container, ch)
-					log.L.WithField("container-id", containerID).Info("processLoop exits")
-					if err != nil {
-						log.L.WithError(err).Error("")
-					}
-					cc.cm.Lock()
-					delete(cc.containers, container.ID)
-					cc.cm.Unlock()
-					delete(cc.containerCh, container.ID)
-					close(ch)
-				}()
+				cc.cm.Unlock()
+				go cc.containerProcessLoop(ctx, container, ch)
 			}
-			ch := cc.containerCh[containerID]
-			ch <- ce
 		}
 	}()
 	return nil
@@ -149,6 +148,23 @@ func (cc *ContainerController) containerJSON(ctx context.Context, id string) (*t
 	return &j, nil
 }
 
+func (cc *ContainerController) containerProcessLoop(ctx context.Context, container *mutexContainer, ch chan containerEvent) {
+	log.L.WithField("container-id", container.ID).Info("processLoop start")
+	err := processLoop(ctx, container, ch)
+	log.L.WithField("container-id", container.ID).Info("processLoop exits")
+	if err != nil {
+		log.L.WithError(err).Error("")
+	}
+	// In some cases, a few events will be catched after the exit of the container
+	// so wait a period of time before clean up to prevent the creation of processLoop of the same container
+	time.Sleep(containerKeepingPeriod)
+	cc.cm.Lock()
+	delete(cc.containers, container.ID)
+	delete(cc.containerCh, container.ID)
+	cc.cm.Unlock()
+	close(ch)
+}
+
 func convert(e sysdig.Event) containerEvent {
 	res := containerEvent{}
 	res.containerID = e.ContainerID

sysdig/sysdig.go

@@ -15,7 +15,7 @@ const bufferSize = 2048
 
 // well, cant find a better filter right now
 // use something others will draining the cpu
-const filter = "container.name!=host"
+const filter = "container.name!=host and (evt.dir=< or evt.type=procexit)"
 
 var formatString = []string{
 	// common part