remove periodical sync of Runtime metrics

cmd/main.go

@@ -69,7 +69,6 @@ const defaultExpirationTime = 24 * time.Hour
 const defaultGardenerRequestTimeout = 60 * time.Second
 const defaultControlPlaneRequeueDuration = 10 * time.Second
 const defaultGardenerRequeueDuration = 15 * time.Second
-const RuntimeMetricRefreshPeriod = 30 * time.Second
 
 func main() {
 	var metricsAddr string
@@ -221,30 +220,20 @@ func main() {
 		os.Exit(1)
 	}
 
-	refreshRuntimeMetrics := func() {
-		logger.Info("Refreshing runtime CR metrics")
-		metrics.ResetRuntimeMetrics()
-		var RuntimeList infrastructuremanagerv1.RuntimeList
-		if err = mgr.GetClient().List(context.TODO(), &RuntimeList); err == nil {
-			for _, rt := range RuntimeList.Items {
-				metrics.SetRuntimeStates(rt)
-			}
+	logger.Info("Refreshing runtime CR metrics")
+	metrics.ResetRuntimeMetrics()
+	var RuntimeList infrastructuremanagerv1.RuntimeList
+	if err = mgr.GetClient().List(context.TODO(), &RuntimeList); err == nil {
+		for _, rt := range RuntimeList.Items {
+			metrics.SetRuntimeStates(rt)
 		}
 	}
 
-	quitChannel := startRuntimeMetricsRefresher(refreshRuntimeMetrics)
-	defer func() {
-		logger.Info("Stopping metric refresh process goroutine")
-		if quitChannel != nil {
-			quitChannel <- true
-		}
-	}()
-
 	setupLog.Info("Starting Manager", "kubeconfigExpirationTime", expirationTime, "kubeconfigRotationPeriod", rotationPeriod)
 
 	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
 		setupLog.Error(err, "problem running manager")
-		os.Exit(1) //nolint:gocritic
+		os.Exit(1)
 	}
 }
 
@@ -324,20 +313,3 @@ func validateAuditLogDataMap(data map[string]map[string]auditlogging.AuditLogDat
 
 	return nil
 }
-
-func startRuntimeMetricsRefresher(refreshFunc func()) chan bool {
-	quitChannel := make(chan bool)
-	go func() {
-		for {
-			time.Sleep(RuntimeMetricRefreshPeriod)
-			select {
-			case <-quitChannel:
-				// println("Received signal to stop metric refresh process")
-				return
-			default:
-				refreshFunc()
-			}
-		}
-	}()
-	return quitChannel
-}