Kubeadm init (pod network CIDR, control-plane endpoint), installing a CNI plugin, kubeadm join and bootstrap tokens

Once hosts are prepared, kubeadm init turns the first machine into a control plane node. It generates a certificate authority and certificates, writes kubeconfig files, creates static Pod manifests for the API server, etcd, scheduler and controller-manager, starts them through the kubelet, and installs CoreDNS and kube-proxy.