1、docker ce安装
https://docs.docker.com/install/linux/docker-ce/centos/
2、kubelet kubeadm kubectl安装（v1.14.1）
https://kubernetes.io/zh/docs/setup/independent/install-kubeadm/
cat <<EOF > /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 exclude=kube* EOF
setenforce 0 sed -i ‘s/^SELINUX=enforcing$/SELINUX=permissive/‘ /etc/selinux/config
systemctl enable kubelet && systemctl start kubelet
从运行结果可以看到kubelet处于定期重启的状态，只有当在master节点执行kubeadm init 或者在worker节点执行kubeadm join时候。kubelet所需要的配置才能被满足。这个时候kubelet才会正常运行起来。
原文：https://www.cnblogs.com/shhnwangjian/p/10721054.html