kubeadm
    config
        images pull
            [config/images] Pulled k8s.gcr.io/kube-apiserver:v1.12.0
            [config/images] Pulled k8s.gcr.io/kube-controller-manager:v1.12.0
            [config/images] Pulled k8s.gcr.io/kube-scheduler:v1.12.0
            [config/images] Pulled k8s.gcr.io/kube-proxy:v1.12.0
            [config/images] Pulled k8s.gcr.io/pause:3.1
            [config/images] Pulled k8s.gcr.io/etcd:3.2.24
            [config/images] Pulled k8s.gcr.io/coredns:1.2.2
    init
        https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-init/
        https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/
        https://github.com/containernetworking/plugins/blob/master/plugins/main/bridge/README.md
        kubectl taint nodes --all node-role.kubernetes.io/master- 

        --dry-run
        --ignore-preflight-errors=all
        --kubernetes-version=1.11.2
            v1.12.0-rc.1
        --pod-network-cidr=10.244.0.0/16
        --apiserver-advertise-address=192.168.6.135
            docker ps -a | grep kube | grep -v pause

    reset
    join
        --token=<some token> <master-ip-addr>
    alpha phase <cmd>
        alpha phase selfhosting !!!
            https://www.slideshare.net/openstack_kr/openinfra-days-korea-2018-day-2-e4-immutable-kubernetes-architecture
???
--token-ttl 0