etcdClientCertKey := env.Get(EnvEtcdClientCertKey, kvs.Get(ClientCertKey))
		if etcdClientCertFile != "" && etcdClientCertKey != "" {
			cfg.TLS.GetClientCertificate = func(unused *tls.CertificateRequestInfo) (*tls.Certificate, error) {
				cert, err := tls.LoadX509KeyPair(etcdClientCertFile, etcdClientCertKey)
				return &cert, err
			}
		}
	}
	return cfg, nil