简化安装
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huanqing.shao
@ -61,157 +61,34 @@
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## 制作标准机镜像
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## 安装 docker / kubelet
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通过使用标准机镜像，可以
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使用 root 身份在所有节点执行如下代码，以安装软件：
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- docker
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- nfs-utils
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- kubectl / kubeadm / kubelet
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- **避免重复执行对测试机安装必要软件的过程**
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- **以一种相对标准化的过程管理测试机的维护**
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:::: tabs type:border-card
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标准机镜像中预装了如下内容：
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::: tab 快速安装 lazy
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- docker
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- nfs-utils
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- kubectl / kubeadm / kubelet
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``` sh
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curl -sSL https://kuboard.cn/install-script/install-kubelet.sh | sh
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```
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::: tip
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* 您也可以不制作标准机镜像，而是在三台机器上都执行 ***制作标准机镜像*** 中的所有操作步骤
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:::
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**标准机镜像的制作过程描述如下：**
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::: tab 手动安装 lazy
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### 安装docker
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手动执行以下代码，效果与快速安装完全相同。
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将以下代码框中所有内容（包括 #及其后的备注）一次性拷贝到 centos 命令行终端执行
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``` sh
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# 在 master 节点和 worker 节点都要执行
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# 卸载旧版本
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yum remove -y docker \
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docker-client \
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docker-client-latest \
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docker-common \
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docker-latest \
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docker-latest-logrotate \
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docker-logrotate \
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docker-selinux \
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docker-engine-selinux \
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docker-engine
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# 设置 yum repository
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yum install -y yum-utils \
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device-mapper-persistent-data \
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lvm2
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yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
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# 安装并启动 docker
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yum install -y docker-ce-18.09.7 docker-ce-cli-18.09.7 containerd.io
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systemctl enable docker
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systemctl start docker
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# 检查 docker 版本
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docker version
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```
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> **参考文档**
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>
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> https://docs.docker.com/install/linux/docker-ce/centos/
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>
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> https://docs.docker.com/install/linux/linux-postinstall/
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### 安装 nfs-utils
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**执行安装命令**
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``` sh
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# 在 master 节点和 worker 节点都要执行
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yum install -y nfs-utils
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```
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必须先安装 nfs-utils 才能挂载 nfs 网络存储
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### 安装 kubectl / kubeadm / kubelet
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将以下代码框中所有内容（包括 #及其后的备注）一次性拷贝到 centos 命令行终端执行
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``` sh
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# 在 master 节点和 worker 节点都要执行
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# 关闭 防火墙
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systemctl stop firewalld
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systemctl disable firewalld
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# 关闭 SeLinux
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setenforce 0
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sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
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# 关闭 swap
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swapoff -a
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yes | cp /etc/fstab /etc/fstab_bak
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cat /etc/fstab_bak |grep -v swap > /etc/fstab
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# 修改 /etc/sysctl.conf
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# 如果有配置，则修改
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sed -i "s#^net.ipv4.ip_forward.*#net.ipv4.ip_forward=1#g" /etc/sysctl.conf
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sed -i "s#^net.bridge.bridge-nf-call-ip6tables.*#net.bridge.bridge-nf-call-ip6tables=1#g" /etc/sysctl.conf
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sed -i "s#^net.bridge.bridge-nf-call-iptables.*#net.bridge.bridge-nf-call-iptables=1#g" /etc/sysctl.conf
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# 可能没有，追加
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echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
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echo "net.bridge.bridge-nf-call-ip6tables = 1" >> /etc/sysctl.conf
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echo "net.bridge.bridge-nf-call-iptables = 1" >> /etc/sysctl.conf
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# 执行命令以应用
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sysctl -p
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# 配置K8S的yum源
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cat <<EOF > /etc/yum.repos.d/kubernetes.repo
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[kubernetes]
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name=Kubernetes
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baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
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enabled=1
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gpgcheck=0
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repo_gpgcheck=0
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gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
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http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
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EOF
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# 安装kubelet、kubeadm、kubectl
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yum install -y kubelet-1.15.2 kubeadm-1.15.2 kubectl-1.15.2
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# 修改docker Cgroup Driver为systemd
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# # 将/usr/lib/systemd/system/docker.service文件中的这一行 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
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# # 修改为 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd
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# 如果不修改，在添加 worker 节点时可能会碰到如下错误
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# [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd".
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# Please follow the guide at https://kubernetes.io/docs/setup/cri/
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sed -i "s#^ExecStart=/usr/bin/dockerd.*#ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd#g" /usr/lib/systemd/system/docker.service
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# 设置 docker 镜像，提高 docker 镜像下载速度和稳定性
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# 如果您访问 https://hub.docker.io 速度非常稳定，亦可以跳过这个步骤
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curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io
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# 重启 docker，并启动 kubelet
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systemctl daemon-reload
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systemctl restart docker
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systemctl enable kubelet && systemctl start kubelet
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```
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<<< @/.vuepress/public/install-script/install-kubelet.sh
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::: warning
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如果此时执行 `service status kubelet` 命令，将得到 kubelet 启动失败的错误提示，请忽略此错误，因为必须完成后续步骤中 kubeadm init 的操作，kubelet 才能正常启动
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:::
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**制作镜像**
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请参考阿里云基于ECS [制作虚拟机镜像](https://help.aliyun.com/document_detail/35109.html?spm=5176.2020520101.0.0.75fc4df5mtdFmV) 的文档
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::::
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## 初始化 master 节点
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