feat: increase QPS and Burst for client (opendatahub-io#1031)

- we might see throttling in some cluster, this is just to uplift the
default value

Signed-off-by: Wen Zhou <wenzhou@redhat.com>
(cherry picked from commit 54ee87d)

main.go

@@ -40,6 +40,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
+	"k8s.io/client-go/rest"
 	apiregistrationv1 "k8s.io/kube-aggregator/pkg/apis/apiregistration/v1"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -60,6 +61,8 @@ import (
 	"github.com/opendatahub-io/opendatahub-operator/v2/pkg/upgrade"
 )
 
+const controllerNum = 4 // we should keep this updated if we have new controllers to add
+
 var (
 	scheme   = runtime.NewScheme()
 	setupLog = ctrl.Log.WithName("setup")
@@ -191,6 +194,9 @@ func main() {
 		setupLog.Error(err, "error getting config for setup")
 		os.Exit(1)
 	}
+	// uplift default limiataions
+	setupCfg.QPS = rest.DefaultQPS * controllerNum     // 5 * 4 controllers
+	setupCfg.Burst = rest.DefaultBurst * controllerNum // 10 * 4 controllers
 
 	setupClient, err := client.New(setupCfg, client.Options{Scheme: scheme})
 	if err != nil {