https://github.com/kubernetes/kubernetes/blob/master/cmd/kubeadm
        https://github.com/kubernetes/kubernetes/blob/master/cmd/kubeadm/app/cmd/init.go

            glog.V(1).Infof("[init] waiting for the API server to be healthy")
            waiter := getWaiter(i, client)

            fmt.Printf("[init] waiting for the kubelet to boot up the control plane as Static Pods from directory %q \n", kubeadmconstants.GetStaticPodDirectory())
            fmt.Println("[init] this might take a minute or longer if the control plane images have to be pulled")


            app/util/kubeconfig.go
                func ClientSetFromFile
                func ToClientSet
                    client, err := clientset.NewForConfig(clientConfig)

staging/src/k8s.io/kube-aggregator/pkg/client/clientset_generated/internalclientset/clientset.go
53:// NewForConfig creates a new Clientset for the given config.
54:func NewForConfig(c *rest.Config) (*Clientset, error) {
61:	cs.apiregistration, err = apiregistrationinternalversion.NewForConfig(&configShallowCopy)


            kubeadm config images pull


        sudo systemctl enable docker.service
        sudo systemctl enable kubelet.service
        -> /etc/kubernetes/*