refactor: implement control plane as controller-runtime manager

cmd/manager.go

@@ -87,23 +87,14 @@ func (m manager) Run(ctx context.Context) error {
 	}
 
 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
-		Scheme:                 scheme,
-		Metrics:                metricsServerOptions,
-		WebhookServer:          webhookServer,
-		HealthProbeBindAddress: m.ProbeAddr,
-		LeaderElection:         m.EnableLeaderElection,
-		LeaderElectionID:       "05f9463f.k8s.icb4dc0.de",
-		// 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,
+		Scheme:                        scheme,
+		Metrics:                       metricsServerOptions,
+		WebhookServer:                 webhookServer,
+		HealthProbeBindAddress:        m.ProbeAddr,
+		LeaderElection:                m.EnableLeaderElection,
+		BaseContext:                   func() context.Context { return ctx },
+		LeaderElectionID:              "05f9463f.k8s.icb4dc0.de",
+		LeaderElectionReleaseOnCancel: true,
 	})
 	if err != nil {
 		return fmt.Errorf("unable to start manager: %w", err)