国内源

1. ubuntu 16.04 / Debian
   $ apt-get update && apt-get install -y apt-transport-https
   $ curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add -
   $ cat </etc/apt/sources.list.d/kubernetes.list
   deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
   EOF
   $ apt-get update
   $ apt-get install -y kubelet kubeadm kubectl
2. 安装指定版本：
   $ apt-get install kubeadm=1.10.2-00 kubectl=1.10.2-00 kubelet=1.10.2-00
   Centos / RHEL / Fedora
   $ cat < /etc/yum.repos.d/kubernetes.repo
   [kubernetes]
   name=Kubernetes
   baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
   enabled=1
   gpgcheck=1
   repo_gpgcheck=1
   gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
   EOF
   $ setenforce 0
   $ yum install -y kubelet kubeadm kubectl
   $ systemctl enable kubelet && systemctl start kubelet