217 lines
4.2 KiB
Markdown
217 lines
4.2 KiB
Markdown
## 制作标准机镜像
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通过使用标准机镜像，可以
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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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标准机镜像中预装了如下内容：
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- docker
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- gitlab-runner
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- kubernetes images
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本文档描述的安装过程已基于 centos 7.6 验证
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标准机镜像的制作过程描述如下：
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### 安装docker
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**卸载旧版本**
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```bash
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sudo yum remove 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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```
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**下载依赖包及安装包**
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```bash
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wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
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wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-18.09.7-3.el7.x86_64.rpm
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wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-18.09.7-3.el7.x86_64.rpm
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```
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**安装**
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```bash
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sudo yum install -y containerd.io-1.2.6-3.3.el7.x86_64.rpm
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sudo yum install -y docker-ce-cli-18.09.7-3.el7.x86_64.rpm
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sudo yum install -y docker-ce-18.09.7-3.el7.x86_64.rpm
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sudo systemctl enable docker
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```
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**启动 docker 服务**
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```bash
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sudo systemctl start docker
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```
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**检查 docker 版本**
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```bash
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docker version
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```
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**参考文档**
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https://docs.docker.com/install/linux/docker-ce/centos/
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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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```bash
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sudo yum install 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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### K8S基本配置
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**配置K8S的yum源**
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```bash
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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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```
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**关闭swap、防火墙**
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```bash
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swapoff -a
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```
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**关闭SeLinux**
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```bash
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setenforce 0
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```
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**修改 /etc/sysctl.conf**
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```vim /etc/sysctl.conf```
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向其中添加
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```
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net.ipv4.ip_forward = 1
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net.bridge.bridge-nf-call-ip6tables = 1
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net.bridge.bridge-nf-call-iptables = 1
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```
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如下图所示
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**安装kubelet、kubeadm、kubectl**
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```bash
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yum install -y kubelet-1.15.0 kubeadm-1.15.0 kubectl-1.15.0
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```
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**修改docker Cgroup Driver为systemd**
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```vim /usr/lib/systemd/system/docker.service```
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向其中他添加
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```--exec-opt native.cgroupdriver=systemd```
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如下图所示
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重启 docker
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```
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systemctl daemon-reload
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systemctl restart docker
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```
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**启动kubelet**
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```bash
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systemctl enable kubelet && systemctl start kubelet
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```
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**加载 kubernetes 镜像**
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由于k8s服务相关镜像在国外镜像源，国内无法访问
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执行以下命令添加docker k8s国内镜像源
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```bash
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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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systemctl restart docker
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```
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**拉取k8s相关镜像**
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```bash
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docker pull mirrorgooglecontainers/kube-apiserver:v1.15.0
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docker pull mirrorgooglecontainers/kube-controller-manager:v1.15.0
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docker pull mirrorgooglecontainers/kube-scheduler:v1.15.0
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docker pull mirrorgooglecontainers/kube-proxy:v1.15.0
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docker pull mirrorgooglecontainers/pause:3.1
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docker pull mirrorgooglecontainers/etcd:3.3.10
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docker pull coredns/coredns:1.3.1
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```
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**更改镜像名为k8s官网镜像**
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```bash
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docker tag d235b23c3570 k8s.gcr.io/kube-proxy:v1.15.0
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docker tag 201c7a840312 k8s.gcr.io/kube-apiserver:v1.15.0
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docker tag 2d3813851e87 k8s.gcr.io/kube-scheduler:v1.15.0
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docker tag 8328bb49b652 k8s.gcr.io/kube-controller-manager:v1.15.0
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docker tag da86e6ba6ca1 k8s.gcr.io/pause:3.1
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docker tag eb516548c180 k8s.gcr.io/coredns:1.3.1
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docker tag 2c4adeb21b4f k8s.gcr.io/etcd:3.3.10
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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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