Consolidate multiple stop channels into one

Author: thoro

app/server.go

@@ -107,9 +107,10 @@ func (kr *KubeRouter) stopApiWatchers() {
 func (kr *KubeRouter) Run() error {
 
 	var err error
-	var nscStopCh, npcStopCh, nrcStopCh chan struct{}
 	var wg sync.WaitGroup
 
+	stopCh := make(chan struct{})
+
 	err = kr.startApiWatchers()
 	if err != nil {
 		return errors.New("Failed to start API watchers: " + err.Error())
@@ -125,29 +126,29 @@ func (kr *KubeRouter) Run() error {
 		if err != nil {
 			return errors.New("Failed to create network policy controller: " + err.Error())
 		}
-		npcStopCh = make(chan struct{})
+
 		wg.Add(1)
-		go npc.Run(npcStopCh, &wg)
+		go npc.Run(stopCh, &wg)
 	}
 
 	if kr.Config.RunRouter {
 		nrc, err := controllers.NewNetworkRoutingController(kr.Client, kr.Config)
 		if err != nil {
 			return errors.New("Failed to create network routing controller: " + err.Error())
 		}
-		nrcStopCh = make(chan struct{})
+
 		wg.Add(1)
-		go nrc.Run(nrcStopCh, &wg)
+		go nrc.Run(stopCh, &wg)
 	}
 
 	if kr.Config.RunServiceProxy {
 		nsc, err := controllers.NewNetworkServicesController(kr.Client, kr.Config)
 		if err != nil {
 			return errors.New("Failed to create network services controller: " + err.Error())
 		}
-		nscStopCh = make(chan struct{})
+
 		wg.Add(1)
-		go nsc.Run(nscStopCh, &wg)
+		go nsc.Run(stopCh, &wg)
 	}
 
 	// Handle SIGINT and SIGTERM
@@ -156,15 +157,7 @@ func (kr *KubeRouter) Run() error {
 	<-ch
 
 	glog.Infof("Shutting down the controllers")
-	if kr.Config.RunServiceProxy {
-		nscStopCh <- struct{}{}
-	}
-	if kr.Config.RunFirewall {
-		npcStopCh <- struct{}{}
-	}
-	if kr.Config.RunRouter {
-		nrcStopCh <- struct{}{}
-	}
+	close(stopCh)
 
 	kr.stopApiWatchers()