func()

in controllers/dsalert_controller.go [63:150]
65 lines of code
16 McCabe index (conditional complexity)

func (r *DSAlertReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {

	alertLogger.Info("dmAlert start reconcile logic")
	defer alertLogger.Info("dmAlert Reconcile end ---------------------------------------------")

	cluster := &dsv1alpha1.DSAlert{}

	if err := r.Client.Get(ctx, req.NamespacedName, cluster); err != nil {
		if errors.IsNotFound(err) {
			r.Recorder.Event(cluster, corev1.EventTypeWarning, "dsAlert is not Found", "dsAlert is not Found")
			return ctrl.Result{}, nil
		}
		return ctrl.Result{}, err
	}
	desired := cluster.DeepCopy()

	// Handler finalizer
	// examine DeletionTimestamp to determine if object is under deletion
	if cluster.ObjectMeta.DeletionTimestamp.IsZero() {
		// The object is not being deleted, so if it does not have our finalizer,
		// then lets add the finalizer and update the object. This is equivalent
		// registering our finalizer.
		if !controllerutil.ContainsFinalizer(desired, dsv1alpha1.FinalizerName) {
			controllerutil.AddFinalizer(desired, dsv1alpha1.FinalizerName)
			if err := r.Update(ctx, desired); err != nil {
				return ctrl.Result{}, err
			}
		}
	} else {
		// The object is being deleted

		if controllerutil.ContainsFinalizer(desired, dsv1alpha1.FinalizerName) {
			// our finalizer is present, so lets handle any external dependency
			if err := r.ensureDSAlertDeleted(ctx, cluster); err != nil {
				return ctrl.Result{}, err
			}

			// remove our finalizer from the list and update it.
			controllerutil.RemoveFinalizer(desired, dsv1alpha1.FinalizerName)
			if err := r.Update(ctx, desired); err != nil {
				return ctrl.Result{}, err
			}
		}
		// Stop reconciliation as the item is being deleted
		return ctrl.Result{}, nil
	}

	if cluster.Spec.Paused {
		alertLogger.Info("ds-alert control has been paused: ", "ds-alert-name", cluster.Name)
		desired.Status.ControlPaused = true
		if err := r.Status().Patch(ctx, desired, client.MergeFrom(cluster)); err != nil {
			return ctrl.Result{}, err
		}
		r.Recorder.Event(cluster, corev1.EventTypeNormal, "the spec status is paused", "do nothing")
		return ctrl.Result{}, nil
	}

	// 1. First time we see the ds-master-cluster, initialize it
	if cluster.Status.Phase == dsv1alpha1.DsPhaseNone {
		desired.Status.Phase = dsv1alpha1.DsPhaseCreating
		alertLogger.Info("phase had been changed from  none ---> creating")
		err := r.Client.Status().Patch(ctx, desired, client.MergeFrom(cluster))
		return ctrl.Result{RequeueAfter: 100 * time.Millisecond}, err
	}

	//2 ensure the alert service
	alertLogger.Info("Ensuring alert service")

	if err := r.ensureAlertService(ctx, cluster); err != nil {
		return ctrl.Result{Requeue: false}, nil
	}

	alertLogger.Info("Ensuring alert Deployment")
	if requeue, err := r.ensureAlertDeployment(ctx, cluster); err != nil {
		return ctrl.Result{Requeue: false}, err
	} else {
		if requeue {
			return ctrl.Result{RequeueAfter: 3 * time.Second}, nil
		}
	}

	alertLogger.Info("******************************************************")
	desired.Status.Phase = dsv1alpha1.DsPhaseNone
	if err := r.Update(ctx, desired); err != nil {
		return ctrl.Result{}, err
	}
	return ctrl.Result{Requeue: false}, nil
}