BootstrapControlPlaneNode returns a handle to the bootstrap control plane node.

Command returns a new exec.Cmd that will run on the node.

ConfigNodeAddressAndRole is return the host ip and role,get host ip and role from kubernetes cluster.

ConstructImage is return the node image,image representative kubernetes version and contain kubelet, kubectl,kubeadm binary defaule image is registry.cn-hangzhou.aliyuncs.com/aliyun_kube_system/kubernetes:v1.xxx.

use grpc copy file.

KubeConfigPath returns the path to where the Kubeconfig would be placed.

control plane nodes are "Ready".

WriteFile writes content to dest on the node.

https://github.com/kubernetes/kubernetes/blob/ba8fcafaf8c502a454acd86b728c857932555315/build/debs/10-kubeadm.conf.

slightly modified from https://github.com/kubernetes/kubernetes/blob/ba8fcafaf8c502a454acd86b728c857932555315/build/debs/kubelet.service.

KubeletServicePath is systemd service path.