---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  annotations:
    controller-gen.kubebuilder.io/version: v0.19.0
  name: memcacheds.cache.example.com
spec:
  group: cache.example.com
  names:
    kind: Memcached
    listKind: MemcachedList
    plural: memcacheds
    singular: memcached
  scope: Namespaced
  versions:
  - name: v1alpha1
    schema:
      openAPIV3Schema:
        description: Memcached is the Schema for the memcacheds API
        properties:
          apiVersion:
            description: |-
              APIVersion defines the versioned schema of this representation of an object.
              Servers should convert recognized schemas to the latest internal value, and
              may reject unrecognized values.
              More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
            type: string
          kind:
            description: |-
              Kind is a string value representing the REST resource this object represents.
              Servers may infer this from the endpoint the client submits requests to.
              Cannot be updated.
              In CamelCase.
              More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
            type: string
          metadata:
            type: object
          spec:
            description: spec defines the desired state of Memcached
            properties:
              size:
                description: |-
                  size defines the number of Memcached instances
                  The following markers will use OpenAPI v3 schema to validate the value
                  More info: https://book.kubebuilder.io/reference/markers/crd-validation.html
                format: int32
                maximum: 3
                minimum: 1
                type: integer
            type: object
          status:
            description: status defines the observed state of Memcached
            properties:
              conditions:
                description: |-
                  conditions represent the current state of the Memcached resource.
                  Each condition has a unique type and reflects the status of a specific aspect of the resource.

                  Standard condition types include:
                  - "Available": the resource is fully functional
                  - "Progressing": the resource is being created or updated
                  - "Degraded": the resource failed to reach or maintain its desired state

                  The status of each condition is one of True, False, or Unknown.
                items:
                  description: Condition contains details for one aspect of the current
                    state of this API Resource.
                  properties:
                    lastTransitionTime:
                      description: |-
                        lastTransitionTime is the last time the condition transitioned from one status to another.
                        This should be when the underlying condition changed.  If that is not known, then using the time when the API field changed is acceptable.
                      format: date-time
                      type: string
                    message:
                      description: |-
                        message is a human readable message indicating details about the transition.
                        This may be an empty string.
                      maxLength: 32768
                      type: string
                    observedGeneration:
                      description: |-
                        observedGeneration represents the .metadata.generation that the condition was set based upon.
                        For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
                        with respect to the current state of the instance.
                      format: int64
                      minimum: 0
                      type: integer
                    reason:
                      description: |-
                        reason contains a programmatic identifier indicating the reason for the condition's last transition.
                        Producers of specific condition types may define expected values and meanings for this field,
                        and whether the values are considered a guaranteed API.
                        The value should be a CamelCase string.
                        This field may not be empty.
                      maxLength: 1024
                      minLength: 1
                      pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
                      type: string
                    status:
                      description: status of the condition, one of True, False, Unknown.
                      enum:
                      - "True"
                      - "False"
                      - Unknown
                      type: string
                    type:
                      description: type of condition in CamelCase or in foo.example.com/CamelCase.
                      maxLength: 316
                      pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
                      type: string
                  required:
                  - lastTransitionTime
                  - message
                  - reason
                  - status
                  - type
                  type: object
                type: array
                x-kubernetes-list-map-keys:
                - type
                x-kubernetes-list-type: map
            type: object
        required:
        - spec
        type: object
    served: true
    storage: true
    subresources:
      status: {}

/*
Copyright 2025 The Kubernetes authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package controller

import (
	"context"
	"fmt"
	"time"

	appsv1 "k8s.io/api/apps/v1"
	corev1 "k8s.io/api/core/v1"
	apierrors "k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/api/meta"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/utils/ptr"

	"k8s.io/apimachinery/pkg/runtime"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
	logf "sigs.k8s.io/controller-runtime/pkg/log"

	cachev1alpha1 "example.com/memcached/api/v1alpha1"
)

// Definitions to manage status conditions
const (
	// typeAvailableMemcached represents the status of the Deployment reconciliation
	typeAvailableMemcached = "Available"
)

// MemcachedReconciler reconciles a Memcached object
type MemcachedReconciler struct {
	client.Client
	Scheme *runtime.Scheme
}

// +kubebuilder:rbac:groups=cache.example.com,resources=memcacheds,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=cache.example.com,resources=memcacheds/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=cache.example.com,resources=memcacheds/finalizers,verbs=update
// +kubebuilder:rbac:groups=core,resources=events,verbs=create;patch
// +kubebuilder:rbac:groups=apps,resources=deployments,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=pods,verbs=get;list;watch

// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
// It is essential for the controller's reconciliation loop to be idempotent. By following the Operator
// pattern you will create Controllers which provide a reconcile function
// responsible for synchronizing resources until the desired state is reached on the cluster.
// Breaking this recommendation goes against the design principles of controller-runtime.
// and may lead to unforeseen consequences such as resources becoming stuck and requiring manual intervention.
// For further info:
// - About Operator Pattern: https://kubernetes.io/docs/concepts/extend-kubernetes/operator/
// - About Controllers: https://kubernetes.io/docs/concepts/architecture/controller/
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.22.1/pkg/reconcile
func (r *MemcachedReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
	log := logf.FromContext(ctx)

	// Fetch the Memcached instance
	// The purpose is check if the Custom Resource for the Kind Memcached
	// is applied on the cluster if not we return nil to stop the reconciliation
	memcached := &cachev1alpha1.Memcached{}
	err := r.Get(ctx, req.NamespacedName, memcached)
	if err != nil {
		if apierrors.IsNotFound(err) {
			// If the custom resource is not found then it usually means that it was deleted or not created
			// In this way, we will stop the reconciliation
			log.Info("memcached resource not found. Ignoring since object must be deleted")
			return ctrl.Result{}, nil
		}
		// Error reading the object - requeue the request.
		log.Error(err, "Failed to get memcached")
		return ctrl.Result{}, err
	}

	// Let's just set the status as Unknown when no status is available
	if len(memcached.Status.Conditions) == 0 {
		meta.SetStatusCondition(&memcached.Status.Conditions, metav1.Condition{Type: typeAvailableMemcached, Status: metav1.ConditionUnknown, Reason: "Reconciling", Message: "Starting reconciliation"})
		if err = r.Status().Update(ctx, memcached); err != nil {
			log.Error(err, "Failed to update Memcached status")
			return ctrl.Result{}, err
		}

		// Let's re-fetch the memcached Custom Resource after updating the status
		// so that we have the latest state of the resource on the cluster and we will avoid
		// raising the error "the object has been modified, please apply
		// your changes to the latest version and try again" which would re-trigger the reconciliation
		// if we try to update it again in the following operations
		if err := r.Get(ctx, req.NamespacedName, memcached); err != nil {
			log.Error(err, "Failed to re-fetch memcached")
			return ctrl.Result{}, err
		}
	}

	// Check if the deployment already exists, if not create a new one
	found := &appsv1.Deployment{}
	err = r.Get(ctx, types.NamespacedName{Name: memcached.Name, Namespace: memcached.Namespace}, found)
	if err != nil && apierrors.IsNotFound(err) {
		// Define a new deployment
		dep, err := r.deploymentForMemcached(memcached)
		if err != nil {
			log.Error(err, "Failed to define new Deployment resource for Memcached")

			// The following implementation will update the status
			meta.SetStatusCondition(&memcached.Status.Conditions, metav1.Condition{Type: typeAvailableMemcached,
				Status: metav1.ConditionFalse, Reason: "Reconciling",
				Message: fmt.Sprintf("Failed to create Deployment for the custom resource (%s): (%s)", memcached.Name, err)})

			if err := r.Status().Update(ctx, memcached); err != nil {
				log.Error(err, "Failed to update Memcached status")
				return ctrl.Result{}, err
			}

			return ctrl.Result{}, err
		}

		log.Info("Creating a new Deployment",
			"Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
		if err = r.Create(ctx, dep); err != nil {
			log.Error(err, "Failed to create new Deployment",
				"Deployment.Namespace", dep.Namespace, "Deployment.Name", dep.Name)
			return ctrl.Result{}, err
		}

		// Deployment created successfully
		// We will requeue the reconciliation so that we can ensure the state
		// and move forward for the next operations
		return ctrl.Result{RequeueAfter: time.Minute}, nil
	} else if err != nil {
		log.Error(err, "Failed to get Deployment")
		// Let's return the error for the reconciliation be re-trigged again
		return ctrl.Result{}, err
	}

	// If the size is not defined in the Custom Resource then we will set the desired replicas to 0
	var desiredReplicas int32 = 0
	if memcached.Spec.Size != nil {
		desiredReplicas = *memcached.Spec.Size
	}

	// The CRD API defines that the Memcached type have a MemcachedSpec.Size field
	// to set the quantity of Deployment instances to the desired state on the cluster.
	// Therefore, the following code will ensure the Deployment size is the same as defined
	// via the Size spec of the Custom Resource which we are reconciling.
	if found.Spec.Replicas == nil || *found.Spec.Replicas != desiredReplicas {
		found.Spec.Replicas = ptr.To(desiredReplicas)
		if err = r.Update(ctx, found); err != nil {
			log.Error(err, "Failed to update Deployment",
				"Deployment.Namespace", found.Namespace, "Deployment.Name", found.Name)

			// Re-fetch the memcached Custom Resource before updating the status
			// so that we have the latest state of the resource on the cluster and we will avoid
			// raising the error "the object has been modified, please apply
			// your changes to the latest version and try again" which would re-trigger the reconciliation
			if err := r.Get(ctx, req.NamespacedName, memcached); err != nil {
				log.Error(err, "Failed to re-fetch memcached")
				return ctrl.Result{}, err
			}

			// The following implementation will update the status
			meta.SetStatusCondition(&memcached.Status.Conditions, metav1.Condition{Type: typeAvailableMemcached,
				Status: metav1.ConditionFalse, Reason: "Resizing",
				Message: fmt.Sprintf("Failed to update the size for the custom resource (%s): (%s)", memcached.Name, err)})

			if err := r.Status().Update(ctx, memcached); err != nil {
				log.Error(err, "Failed to update Memcached status")
				return ctrl.Result{}, err
			}

			return ctrl.Result{}, err
		}

		// Now, that we update the size we want to requeue the reconciliation
		// so that we can ensure that we have the latest state of the resource before
		// update. Also, it will help ensure the desired state on the cluster
		return ctrl.Result{Requeue: true}, nil
	}

	// The following implementation will update the status
	meta.SetStatusCondition(&memcached.Status.Conditions, metav1.Condition{Type: typeAvailableMemcached,
		Status: metav1.ConditionTrue, Reason: "Reconciling",
		Message: fmt.Sprintf("Deployment for custom resource (%s) with %d replicas created successfully", memcached.Name, desiredReplicas)})

	if err := r.Status().Update(ctx, memcached); err != nil {
		log.Error(err, "Failed to update Memcached status")
		return ctrl.Result{}, err
	}

	return ctrl.Result{}, nil
}

// SetupWithManager sets up the controller with the Manager.
func (r *MemcachedReconciler) SetupWithManager(mgr ctrl.Manager) error {
	return ctrl.NewControllerManagedBy(mgr).
		For(&cachev1alpha1.Memcached{}).
		Owns(&appsv1.Deployment{}).
		Named("memcached").
		Complete(r)
}

// deploymentForMemcached returns a Memcached Deployment object
func (r *MemcachedReconciler) deploymentForMemcached(
	memcached *cachev1alpha1.Memcached) (*appsv1.Deployment, error) {
	image := "memcached:1.6.26-alpine3.19"

	dep := &appsv1.Deployment{
		ObjectMeta: metav1.ObjectMeta{
			Name:      memcached.Name,
			Namespace: memcached.Namespace,
		},
		Spec: appsv1.DeploymentSpec{
			Replicas: memcached.Spec.Size,
			Selector: &metav1.LabelSelector{
				MatchLabels: map[string]string{"app.kubernetes.io/name": "project"},
			},
			Template: corev1.PodTemplateSpec{
				ObjectMeta: metav1.ObjectMeta{
					Labels: map[string]string{"app.kubernetes.io/name": "project"},
				},
				Spec: corev1.PodSpec{
					SecurityContext: &corev1.PodSecurityContext{
						RunAsNonRoot: ptr.To(true),
						SeccompProfile: &corev1.SeccompProfile{
							Type: corev1.SeccompProfileTypeRuntimeDefault,
						},
					},
					Containers: []corev1.Container{{
						Image:           image,
						Name:            "memcached",
						ImagePullPolicy: corev1.PullIfNotPresent,
						// Ensure restrictive context for the container
						// More info: https://kubernetes.io/docs/concepts/security/pod-security-standards/#restricted
						SecurityContext: &corev1.SecurityContext{
							RunAsNonRoot:             ptr.To(true),
							RunAsUser:                ptr.To(int64(1001)),
							AllowPrivilegeEscalation: ptr.To(false),
							Capabilities: &corev1.Capabilities{
								Drop: []corev1.Capability{
									"ALL",
								},
							},
						},
						Ports: []corev1.ContainerPort{{
							ContainerPort: 11211,
							Name:          "memcached",
						}},
						Command: []string{"memcached", "--memory-limit=64", "-o", "modern", "-v"},
					}},
				},
			},
		},
	}

	// Set the ownerRef for the Deployment
	// More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/owners-dependents/
	if err := ctrl.SetControllerReference(memcached, dep, r.Scheme); err != nil {
		return nil, err
	}
	return dep, nil
}

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: manager-role
rules:
- apiGroups:
  - ""
  resources:
  - events
  verbs:
  - create
  - patch
- apiGroups:
  - ""
  resources:
  - pods
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - apps
  resources:
  - deployments
  verbs:
  - create
  - delete
  - get
  - list
  - patch
  - update
  - watch
- apiGroups:
  - cache.example.com
  resources:
  - memcacheds
  verbs:
  - create
  - delete
  - get
  - list
  - patch
  - update
  - watch
- apiGroups:
  - cache.example.com
  resources:
  - memcacheds/finalizers
  verbs:
  - update
- apiGroups:
  - cache.example.com
  resources:
  - memcacheds/status
  verbs:
  - get
  - patch
  - update

/*
Copyright 2025 The Kubernetes authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"crypto/tls"
	"flag"
	"os"

	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
	// to ensure that exec-entrypoint and run can make use of them.
	_ "k8s.io/client-go/plugin/pkg/client/auth"

	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	"sigs.k8s.io/controller-runtime/pkg/metrics/filters"
	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
	"sigs.k8s.io/controller-runtime/pkg/webhook"

	cachev1alpha1 "example.com/memcached/api/v1alpha1"
	"example.com/memcached/internal/controller"
	// +kubebuilder:scaffold:imports
)

var (
	scheme   = runtime.NewScheme()
	setupLog = ctrl.Log.WithName("setup")
)

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))

	utilruntime.Must(cachev1alpha1.AddToScheme(scheme))
	// +kubebuilder:scaffold:scheme
}

// nolint:gocyclo
func main() {
	var metricsAddr string
	var metricsCertPath, metricsCertName, metricsCertKey string
	var webhookCertPath, webhookCertName, webhookCertKey string
	var enableLeaderElection bool
	var probeAddr string
	var secureMetrics bool
	var enableHTTP2 bool
	var tlsOpts []func(*tls.Config)
	flag.StringVar(&metricsAddr, "metrics-bind-address", "0", "The address the metrics endpoint binds to. "+
		"Use :8443 for HTTPS or :8080 for HTTP, or leave as 0 to disable the metrics service.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	flag.BoolVar(&secureMetrics, "metrics-secure", true,
		"If set, the metrics endpoint is served securely via HTTPS. Use --metrics-secure=false to use HTTP instead.")
	flag.StringVar(&webhookCertPath, "webhook-cert-path", "", "The directory that contains the webhook certificate.")
	flag.StringVar(&webhookCertName, "webhook-cert-name", "tls.crt", "The name of the webhook certificate file.")
	flag.StringVar(&webhookCertKey, "webhook-cert-key", "tls.key", "The name of the webhook key file.")
	flag.StringVar(&metricsCertPath, "metrics-cert-path", "",
		"The directory that contains the metrics server certificate.")
	flag.StringVar(&metricsCertName, "metrics-cert-name", "tls.crt", "The name of the metrics server certificate file.")
	flag.StringVar(&metricsCertKey, "metrics-cert-key", "tls.key", "The name of the metrics server key file.")
	flag.BoolVar(&enableHTTP2, "enable-http2", false,
		"If set, HTTP/2 will be enabled for the metrics and webhook servers")
	opts := zap.Options{
		Development: true,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))

	// if the enable-http2 flag is false (the default), http/2 should be disabled
	// due to its vulnerabilities. More specifically, disabling http/2 will
	// prevent from being vulnerable to the HTTP/2 Stream Cancellation and
	// Rapid Reset CVEs. For more information see:
	// - https://github.com/advisories/GHSA-qppj-fm5r-hxr3
	// - https://github.com/advisories/GHSA-4374-p667-p6c8
	disableHTTP2 := func(c *tls.Config) {
		setupLog.Info("disabling http/2")
		c.NextProtos = []string{"http/1.1"}
	}

	if !enableHTTP2 {
		tlsOpts = append(tlsOpts, disableHTTP2)
	}

	// Initial webhook TLS options
	webhookTLSOpts := tlsOpts
	webhookServerOptions := webhook.Options{
		TLSOpts: webhookTLSOpts,
	}

	if len(webhookCertPath) > 0 {
		setupLog.Info("Initializing webhook certificate watcher using provided certificates",
			"webhook-cert-path", webhookCertPath, "webhook-cert-name", webhookCertName, "webhook-cert-key", webhookCertKey)

		webhookServerOptions.CertDir = webhookCertPath
		webhookServerOptions.CertName = webhookCertName
		webhookServerOptions.KeyName = webhookCertKey
	}

	webhookServer := webhook.NewServer(webhookServerOptions)

	// Metrics endpoint is enabled in 'config/default/kustomization.yaml'. The Metrics options configure the server.
	// More info:
	// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.22.1/pkg/metrics/server
	// - https://book.kubebuilder.io/reference/metrics.html
	metricsServerOptions := metricsserver.Options{
		BindAddress:   metricsAddr,
		SecureServing: secureMetrics,
		TLSOpts:       tlsOpts,
	}

	if secureMetrics {
		// FilterProvider is used to protect the metrics endpoint with authn/authz.
		// These configurations ensure that only authorized users and service accounts
		// can access the metrics endpoint. The RBAC are configured in 'config/rbac/kustomization.yaml'. More info:
		// https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.22.1/pkg/metrics/filters#WithAuthenticationAndAuthorization
		metricsServerOptions.FilterProvider = filters.WithAuthenticationAndAuthorization
	}

	// If the certificate is not specified, controller-runtime will automatically
	// generate self-signed certificates for the metrics server. While convenient for development and testing,
	// this setup is not recommended for production.
	//
	// TODO(user): If you enable certManager, uncomment the following lines:
	// - [METRICS-WITH-CERTS] at config/default/kustomization.yaml to generate and use certificates
	// managed by cert-manager for the metrics server.
	// - [PROMETHEUS-WITH-CERTS] at config/prometheus/kustomization.yaml for TLS certification.
	if len(metricsCertPath) > 0 {
		setupLog.Info("Initializing metrics certificate watcher using provided certificates",
			"metrics-cert-path", metricsCertPath, "metrics-cert-name", metricsCertName, "metrics-cert-key", metricsCertKey)

		metricsServerOptions.CertDir = metricsCertPath
		metricsServerOptions.CertName = metricsCertName
		metricsServerOptions.KeyName = metricsCertKey
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		Metrics:                metricsServerOptions,
		WebhookServer:          webhookServer,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "4b13cc52.example.com",
		// LeaderElectionReleaseOnCancel defines if the leader should step down voluntarily
		// when the Manager ends. This requires the binary to immediately end when the
		// Manager is stopped, otherwise, this setting is unsafe. Setting this significantly
		// speeds up voluntary leader transitions as the new leader don't have to wait
		// LeaseDuration time first.
		//
		// In the default scaffold provided, the program ends immediately after
		// the manager stops, so would be fine to enable this option. However,
		// if you are doing or is intended to do any operation such as perform cleanups
		// after the manager stops then its usage might be unsafe.
		// LeaderElectionReleaseOnCancel: true,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if err := (&controller.MemcachedReconciler{
		Client: mgr.GetClient(),
		Scheme: mgr.GetScheme(),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "Memcached")
		os.Exit(1)
	}
	// +kubebuilder:scaffold:builder

	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up health check")
		os.Exit(1)
	}
	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up ready check")
		os.Exit(1)
	}

	setupLog.Info("starting manager")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}