Add comment about the controller change

Author: aledbf

components/ws-manager-mk2/controllers/maintenance_controller.go

@@ -113,6 +113,9 @@ func (r *MaintenanceReconciler) setEnabledUntil(ctx context.Context, enabledUnti
 }
 
 func (r *MaintenanceReconciler) SetupWithManager(ctx context.Context, mgr ctrl.Manager) error {
+	// We need to use an unmanaged controller to avoid issues when the pod is in standby mode.
+	// In that scenario, the controllers are not started and don't watch changes and only
+	// observe the maintenance mode during the initialization.
 	c, err := controller.NewUnmanaged("maintenance-controller", mgr, controller.Options{Reconciler: r})
 	if err != nil {
 		return err
@@ -127,7 +130,6 @@ func (r *MaintenanceReconciler) SetupWithManager(ctx context.Context, mgr ctrl.M
 	}()
 
 	return c.Watch(source.Kind(mgr.GetCache(), &corev1.ConfigMap{}), &handler.EnqueueRequestForObject{}, &filterConfigMap{})
-
 }
 
 type filterConfigMap struct {