We are now building a simple cluster, consisting of a control-plane with nnodes, so we run the kubeadm initcommand with no arguments. If you have plans to upgrade this single control-planekubeadmcluster to high availability you should specify the--control-plane-endpointto set the shared endpoint for all control-plane nodes. Such an endpoint can be either a DNS name or an IP address of a load-balancer.