1. install Docker

yum update -y

yum remove -y docker docker-common docker-selinux docker-engine
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install -y docker-ce-18.09.0

sed -i -e "/ExecStart/ s/$/ --exec-opt native.cgroupdriver=systemd/" /usr/lib/systemd/system/docker.service
systemctl enable docker && systemctl restart docker && systemctl status docker
docker --version

2. install kubeadm

cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes Repository
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/  
enabled=1
gpgcheck=0
EOF

yum install -y kubeadm kubelet-1.14.0 --disableexcludes=kubernetes

systemctl enable kubelet && systemctl start kubelet

3. config

cat > join-config.yaml << EOF
apiVersion: kubeadm.k8s.io/v1beta1
kind: JoinConfiguration
discovery:
  bootstrapToken:
    apiServerEndpoint: 172.21.102.130:6443
    token: 5avkfv.8bu2kbbgc85kank0
    unsafeSkipCAVerification: true
  tlsBootstrapToken: 5avkfv.8bu2kbbgc85kank0
EOF

cat > /etc/docker/daemon.json << EOF
{
  "registry-mirrors": "https://registry.docker-cn.com"
}
EOF

kubeadm join --config=join-config.yaml