Make kube-proxy resync its rules on firewalld restart

pkg/proxy/userspace/proxier.go

@@ -222,6 +222,15 @@ func CleanupLeftovers(ipt iptables.Interface) (encounteredError bool) {
 	return encounteredError
 }
 
+// Sync is called to immediately synchronize the proxier state to iptables
+func (proxier *Proxier) Sync() {
+	if err := iptablesInit(proxier.iptables); err != nil {
+		glog.Errorf("Failed to ensure iptables: %v", err)
+	}
+	proxier.ensurePortals()
+	proxier.cleanupStaleStickySessions()
+}
+
 // SyncLoop runs periodic work.  This is expected to run as a goroutine or as the main loop of the app.  It does not return.
 func (proxier *Proxier) SyncLoop() {
 	t := time.NewTicker(proxier.syncPeriod)
@@ -229,11 +238,7 @@ func (proxier *Proxier) SyncLoop() {
 	for {
 		<-t.C
 		glog.V(6).Infof("Periodic sync")
-		if err := iptablesInit(proxier.iptables); err != nil {
-			glog.Errorf("Failed to ensure iptables: %v", err)
-		}
-		proxier.ensurePortals()
-		proxier.cleanupStaleStickySessions()
+		proxier.Sync()
 	}
 }