func startControllers()

in cmd/kube-egress-gateway-controller/cmd/root.go [110:205]
80 lines of code
12 McCabe index (conditional complexity)

func startControllers(cmd *cobra.Command, args []string) {
	var err error
	var setupLog = ctrl.Log.WithName("setup")

	options := ctrl.Options{
		Scheme: scheme,
		Metrics: metricsserver.Options{
			BindAddress: ":" + strconv.Itoa(metricsPort),
		},
		HealthProbeBindAddress:  ":" + strconv.Itoa(probePort),
		LeaderElection:          enableLeaderElection,
		LeaderElectionNamespace: leaderElectionNamespace,
		LeaderElectionID:        "0a299682.microsoft.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,
		BaseContext: func() context.Context {
			return ctrl.LoggerInto(context.Background(), ctrl.Log)
		},
	}
	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), options)
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	cloudConfig, err = configloader.Load[config.CloudConfig](context.Background(), nil, &configloader.FileLoaderConfig{FilePath: cloudConfigFile})
	if err != nil {
		setupLog.Error(err, "unable to parse config file")
		os.Exit(1)
	}
	if err := cloudConfig.DefaultAndValidate(); err != nil {
		setupLog.Error(err, "cloud configuration is invalid")
		os.Exit(1)
	}
	factory, err := getClientFactoryFromConfig(cloudConfig)
	if err != nil {
		setupLog.Error(err, "unable to create client factory")
		os.Exit(1)
	}
	az, err := azmanager.CreateAzureManager(cloudConfig, factory)
	if err != nil {
		setupLog.Error(err, "unable to create azure manager")
		os.Exit(1)
	}

	if err = (&controllers.StaticGatewayConfigurationReconciler{
		Client:          mgr.GetClient(),
		SecretNamespace: secretNamespace,
		Recorder:        mgr.GetEventRecorderFor("staticGatewayConfiguration-controller"),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "StaticGatewayConfiguration")
		os.Exit(1)
	}
	if err = (&controllers.GatewayLBConfigurationReconciler{
		Client:       mgr.GetClient(),
		AzureManager: az,
		Recorder:     mgr.GetEventRecorderFor("gatewayLBConfiguration-controller"),
		LBProbePort:  gatewayLBProbePort,
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "GatewayLBConfiguration")
		os.Exit(1)
	}
	if err = (&controllers.GatewayVMConfigurationReconciler{
		Client:       mgr.GetClient(),
		AzureManager: az,
		Recorder:     mgr.GetEventRecorderFor("gatewayVMConfiguration-controller"),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "GatewayVMConfiguration")
		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)
	}
}