s.TLSConfig = tlsOptions.Config
		// Passing empty strings as the cert and key files means no
		// cert/keys are specified and GetCertificate in the TLSConfig
		// should be called instead.
		if err := s.ListenAndServeTLS(tlsOptions.CertFile, tlsOptions.KeyFile); err != nil {
			klog.ErrorS(err, "Failed to listen and serve")
			os.Exit(1)
		}
	} else if err := s.ListenAndServe(); err != nil {