Setup health and ready endpoints

main.go

@@ -26,6 +26,7 @@ import (
 	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
 	"sigs.k8s.io/cli-utils/pkg/kstatus/polling"
 	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/healthz"
 	crtlmetrics "sigs.k8s.io/controller-runtime/pkg/metrics"
 
 	kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1beta1"
@@ -54,6 +55,7 @@ func main() {
 	var (
 		metricsAddr          string
 		eventsAddr           string
+		healthAddr 			 string
 		enableLeaderElection bool
 		concurrent           int
 		requeueDependency    time.Duration
@@ -64,6 +66,7 @@ func main() {
 
 	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
 	flag.StringVar(&eventsAddr, "events-addr", "", "The address of the events receiver.")
+	flag.StringVar(&healthAddr, "health-addr", ":9440", "The address the health endpoint binds to.")
 	flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
 		"Enable leader election for controller manager. "+
 			"Enabling this will ensure there is only one active controller manager.")
@@ -103,12 +106,15 @@ func main() {
 		LeaderElectionID:   "7593cc5d.fluxcd.io",
 		Namespace:          watchNamespace,
 		Logger:             ctrl.Log,
+		HealthProbeBindAddress: healthAddr,
 	})
 	if err != nil {
 		setupLog.Error(err, "unable to start manager")
 		os.Exit(1)
 	}
 
+	setupChecks(mgr)
+
 	if err = (&controllers.GitRepositoryWatcher{
 		Client: mgr.GetClient(),
 		Log:    ctrl.Log.WithName("controllers").WithName(sourcev1.GitRepositoryKind),
@@ -148,3 +154,15 @@ func main() {
 		os.Exit(1)
 	}
 }
+
+func setupChecks(mgr ctrl.Manager) {
+	if err := mgr.AddReadyzCheck("ping", healthz.Ping); err != nil {
+		setupLog.Error(err, "unable to create ready check")
+		os.Exit(1)
+	}
+
+	if err := mgr.AddHealthzCheck("ping", healthz.Ping); err != nil {
+		setupLog.Error(err, "unable to create health check")
+		os.Exit(1)
+	}
+}