Update for new controller runtime version

Signed-off-by: Jacob Weinstock <jakobweinstock@gmail.com>

main.go

@@ -37,6 +37,7 @@ import (
 	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/cache"
 	"sigs.k8s.io/controller-runtime/pkg/healthz"
 	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
 
@@ -117,14 +118,15 @@ func main() {
 
 	mgr, err := ctrl.NewManager(cfg, ctrl.Options{
 		Scheme: scheme,
+		Cache: cache.Options{
+			DefaultNamespaces: map[string]cache.Config{kubeNamespace: {}},
+		},
 		Metrics: metricsserver.Options{
 			BindAddress: metricsAddr,
 		},
-		// Port:                   9443,
-		HealthProbeBindAddress:  probeAddr,
-		LeaderElection:          enableLeaderElection,
-		LeaderElectionID:        "e74dec1a.tinkerbell.org",
-		LeaderElectionNamespace: kubeNamespace,
+		HealthProbeBindAddress: probeAddr,
+		LeaderElection:         enableLeaderElection,
+		LeaderElectionID:       "e74dec1a.tinkerbell.org",
 	})
 	if err != nil {
 		setupLog.Error(err, "unable to start manager")