一、安装docker

1. 安装docker

   yum install wget -y 
   wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
   yum install docker-ce docker-ce-cli -y

2. 编辑/etc/docker/daemon.json

   mkdir /etc/docker/ 
   cat > /etc/docker/daemon.json << EOF
   {
   "registry-mirrors": ["https://gqs7xcfd.mirror.aliyuncs.com","https://hub-mirror.c.163.com"],
   "exec-opts": ["native.cgroupdriver=systemd"],
   "log-driver": "json-file",
   "log-opts": {
   "max-size": "100m"
   },
   "storage-driver": "overlay2"
   }
   EOF

3. 启动docker服务

   systemctl daemon-reload && systemctl enable docker && systemctl start docker

二、安装kubeadm,kubelet和kubectl

1. 配置yum源(这里使用阿里云的源)

   cat > /etc/yum.repos.d/kubernetes.repo << EOF
   [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

2. 安装kubeadm,kubelet,kubectl

   yum install -y kubelet-1.18.8 kubeadm-1.18.8 kubectl-1.18.8

3. 设置开机自启

   systemctl enable kubelet