code: func GetDefaultCertList() Certificates {
  	return Certificates{
  		&KubeadmCertRootCA,
  		&KubeadmCertAPIServer,
  		&KubeadmCertKubeletClient,
  		// Front Proxy certs
  		&KubeadmCertFrontProxyCA,
  		&KubeadmCertFrontProxyClient,
  		// etcd certs
  		&KubeadmCertEtcdCA,
  		&KubeadmCertEtcdServer,
  		&KubeadmCertEtcdPeer,
  		&KubeadmCertEtcdHealthcheck,
  		&KubeadmCertEtcdAPIClient,
  	}
  }
docs: // GetDefaultCertList returns  all of the certificates kubeadm requires to function.