hello_controller.go

func (r *ReconcileHello) Reconcile(request reconcile.Request) (reconcile.Result, error) {
	reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
	reqLogger.Info("Reconciling Hello")
  // Fetch the Hello instance
	instance := &hellov1alpha1.Hello{}
	err := r.client.Get(context.TODO(), request.NamespacedName, instance)

  ...
  
  // Define a new Pod object
	pod := newPodForCR(instance)

	// Set Hello instance as the owner and controller
	if err := controllerutil.SetControllerReference(instance, pod, r.scheme); err != nil {
		return reconcile.Result{}, err
	}
  
  ...
  
}

func newPodForCR(cr *hellov1alpha1.Hello) *corev1.Pod {
	labels := map[string]string{
		"app": cr.Name,
	}
	return &corev1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      cr.Name + "-pod",
			Namespace: cr.Namespace,
			Labels:    labels,
		},
		Spec: corev1.PodSpec{
			Containers: []corev1.Container{
				{
					Name:    "busybox",
					Image:   "busybox",
					Command: []string{"sleep", "3600"},
				},
			},
		},
	}
}