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> 本文作者:丁辉
# Centos安装Docker
> 整体来说各系统安装方式都相差不大,那么咱们这里只举例 Centos 安装 Docker 形式
>
> [官网安装文档](https://docs.docker.com/engine/install/)
## 开始部署
1. 卸载就办 Docker
```bash
sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
```
2. 安装必要依赖
```bash
yum install -y yum-utils device-mapper-persistent-data lvm2
```
**参数解释**
| 依赖包 | 作用 | 为什么需要 |
| :-------------------------------: | :-----------------------: | :-----------------------------------: |
| **yum-utils** | 添加和管理 yum 仓库 | 用于添加 Docker 官方仓库 |
| **device-mapper-persistent-data** | devicemapper 存储驱动依赖 | 保证 Docker 底层存储驱动正常运行 |
| **lvm2** | 提供逻辑卷管理工具 | devicemapper 依赖,提供底层块存储支持 |
3. 设置存储库
- 官方源
```bash
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
```
- 国内源
```bash
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
```
- 清华 TUNA Docker 源
```bash
cat > /etc/yum.repos.d/docker-ce.repo << 'EOF'
[docker-ce-stable]
name=Docker CE Stable - $basearch
baseurl=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/$releasever/$basearch/stable
enabled=1
gpgcheck=1
gpgkey=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/gpg
[docker-ce-stable-debuginfo]
name=Docker CE Stable - Debuginfo $basearch
baseurl=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/$releasever/debug-$basearch/stable
enabled=0
gpgcheck=1
gpgkey=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/gpg
[docker-ce-stable-source]
name=Docker CE Stable - Sources
baseurl=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/$releasever/source/stable
enabled=0
gpgcheck=1
gpgkey=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/gpg
EOF
```
4. 刷新 YUM 缓存
```bash
yum clean all
yum makecache
```
5. 安装最新版
```bash
yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
```
> 安装特定版本
>
> - 查看版本库
>
> ```bash
> yum list docker-ce --showduplicates | sort -r
> ```
>
> - 安装
>
> ```bash
> sudo yum install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io docker-buildx-plugin docker-compose-plugin
> ```
6. 启动
```bash
systemctl enable docker
systemctl start docker
```
## 卸载 Docker
1. 卸载软件包
```bash
yum remove docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-ce-rootless-extras
```
2. 清理文件
```bash
rm -rf /var/lib/docker
rm -rf /var/lib/containerd
```