to squash: a few minor refactoring

Author: hongkailiu

pkg/cvo/metrics.go

@@ -142,14 +142,14 @@ func createHttpServer(ctx context.Context, client *authenticationclientsetv1.Aut
 	return server
 }
 
-type TokenReviewInterface interface {
+type tokenReviewInterface interface {
 	Create(ctx context.Context, tokenReview *authenticationv1.TokenReview, opts metav1.CreateOptions) (*authenticationv1.TokenReview, error)
 }
 
 type authHandler struct {
 	downstream http.Handler
 	ctx        context.Context
-	client     TokenReviewInterface
+	client     tokenReviewInterface
 }
 
 func (a *authHandler) authorize(token string) (bool, error) {
@@ -163,9 +163,9 @@ func (a *authHandler) authorize(token string) (bool, error) {
 		return false, fmt.Errorf("failed to check token: %w", err)
 	}
 	if !result.Status.Authenticated {
-		klog.V(2).Info("The token cannot be authenticated.")
+		klog.V(4).Info("The token cannot be authenticated.")
 	} else if user := result.Status.User.Username; user != "system:serviceaccount:openshift-monitoring:prometheus-k8s" {
-		klog.V(2).Infof("Access the metrics from he unexpected user %s is denied.", user)
+		klog.V(4).Infof("Access the metrics from he unexpected user %s is denied.", user)
 	}
 	return result.Status.Authenticated && result.Status.User.Username == "system:serviceaccount:openshift-monitoring:prometheus-k8s", nil
 }