Update emptymain.go

Update deprecated manager Options fields

Author: buraksekili

docs/book/src/cronjob-tutorial/testdata/emptymain.go

@@ -28,9 +28,10 @@ package main
 
 import (
 	"flag"
-	"fmt"
 	"os"
 
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
+
 	// 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"
@@ -43,6 +44,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/cache"
 	"sigs.k8s.io/controller-runtime/pkg/healthz"
 	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+	"sigs.k8s.io/controller-runtime/pkg/metrics/server"
 	// +kubebuilder:scaffold:imports
 )
 
@@ -104,9 +106,11 @@ func main() {
 	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
 
 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
-		Scheme:                 scheme,
-		MetricsBindAddress:     metricsAddr,
-		Port:                   9443,
+		Scheme: scheme,
+		Metrics: server.Options{
+			BindAddress: metricsAddr,
+		},
+		WebhookServer:          webhook.NewServer(webhook.Options{Port: 9443}),
 		HealthProbeBindAddress: probeAddr,
 		LeaderElection:         enableLeaderElection,
 		LeaderElectionID:       "80807133.tutorial.kubebuilder.io",
@@ -121,10 +125,16 @@ func main() {
 	*/
 
 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
-		Scheme:                 scheme,
-		Namespace:              namespace,
-		MetricsBindAddress:     metricsAddr,
-		Port:                   9443,
+		Scheme: scheme,
+		Cache: cache.Options{
+			DefaultNamespaces: map[string]cache.Config{
+				namespace: {},
+			},
+		},
+		Metrics: server.Options{
+			BindAddress: metricsAddr,
+		},
+		WebhookServer:          webhook.NewServer(webhook.Options{Port: 9443}),
 		HealthProbeBindAddress: probeAddr,
 		LeaderElection:         enableLeaderElection,
 		LeaderElectionID:       "80807133.tutorial.kubebuilder.io",
@@ -136,24 +146,33 @@ func main() {
 		`ClusterRole` and `ClusterRoleBinding` to `Role` and `RoleBinding` respectively.
 		For further information see the Kubernetes documentation about Using [RBAC Authorization](https://kubernetes.io/docs/reference/access-authn-authz/rbac/).
 
-		Also, it is possible to use the [`MultiNamespacedCacheBuilder`](https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/cache#MultiNamespacedCacheBuilder)
-		to watch a specific set of namespaces:
+		Also, it is possible to use the [`DefaultNamespaces`](https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/cache#Options)
+		from `cache.Options{}` to cache objects in a specific set of namespaces:
 	*/
 
 	var namespaces []string // List of Namespaces
+	defaultNamespaces := make(map[string]cache.Config)
+
+	for _, ns := range namespaces {
+		defaultNamespaces[ns] = cache.Config{}
+	}
 
 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
-		Scheme:                 scheme,
-		NewCache:               cache.MultiNamespacedCacheBuilder(namespaces),
-		MetricsBindAddress:     fmt.Sprintf("%s:%d", metricsHost, metricsPort),
-		Port:                   9443,
+		Scheme: scheme,
+		Cache: cache.Options{
+			DefaultNamespaces: defaultNamespaces,
+		},
+		Metrics: server.Options{
+			BindAddress: metricsAddr,
+		},
+		WebhookServer:          webhook.NewServer(webhook.Options{Port: 9443}),
 		HealthProbeBindAddress: probeAddr,
 		LeaderElection:         enableLeaderElection,
 		LeaderElectionID:       "80807133.tutorial.kubebuilder.io",
 	})
 
 	/*
-		For further information see [`MultiNamespacedCacheBuilder`](https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/cache?tab=doc#MultiNamespacedCacheBuilder)
+		For further information see [`cache.Options{}`](https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/cache#Options)
 	*/
 
 	// +kubebuilder:scaffold:builder