Debian 安装 Docker-CE

创建日期：2023/05/25 修改日期：2024/06/11 Linux Docker

- 官方教程：[https://docs.docker.com/engine/install/debian/](https://docs.docker.com/engine/install/debian/)
- 阿里教程：[https://developer.aliyun.com/article/110806](https://developer.aliyun.com/article/110806) 不推荐使用，仅用于获取阿里镜像地址

> 注：以下命令使用 `root` 账户

### 如果之前安装过docker，请先卸载旧版本

```bash
for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do sudo apt-get remove $pkg; done
```

### 设置存储库

#### 更新 `apt` 包索引并安装包以允许 `apt` 通过 `HTTPS` 使用存储库

```bash
apt-get update
apt-get install ca-certificates curl gnupg
```

#### 添加 `Docker` 的官方 `GPG` 密钥

```bash
install -m 0755 -d /etc/apt/keyrings

# 以下地址三选一
# 官方
curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
# 阿里
curl -fsSL http://mirrors.aliyun.com/docker-ce/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
# 清华
curl -fsSL https://mirror.tuna.tsinghua.edu.cn/docker-ce/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg

chmod a+r /etc/apt/keyrings/docker.gpg
```

#### 设置存储库并更新缓存

设置源（三选一）

```bash
# 官方源
echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  tee /etc/apt/sources.list.d/docker.list > /dev/null

# 阿里源
echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] http://mirrors.aliyun.com/docker-ce/linux/debian \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  tee /etc/apt/sources.list.d/docker.list > /dev/null

# 清华源
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/debian \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  tee /etc/apt/sources.list.d/docker.list > /dev/null
```

更新缓存

```bash
apt-get update
```

### 安装 Docker-CE

#### 安装最新版本

```bash
apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
```

#### 安装指定版本

查看版本列表

```bash
apt-cache madison docker-ce | awk '{ print $3 }'
```

查看到如下类似内容，存储库中列出可用版本

```
5:24.0.1-1~debian.10~buster
5:24.0.0-1~debian.10~buster
5:23.0.6-1~debian.10~buster
5:23.0.5-1~debian.10~buster
...
5:20.10.24~3-0~debian-buster
5:20.10.23~3-0~debian-buster
5:20.10.22~3-0~debian-buster
...
```

选择所需版本并安装：

```bash
VERSION_STRING=5:20.10.23~3-0~debian-bullseye
apt-get install docker-ce=$VERSION_STRING docker-ce-cli=$VERSION_STRING containerd.io docker-buildx-plugin docker-compose-plugin
```

#### 更新版本

命令同安装命令

### 修改cgroupdriver & 修改日志文件记录方式 & 使用容器镜像服务

- `docker` 默认使用的文件驱动是 `cgroups` ，如果后期使用 `k8s` 时需要修改为 `Systemd` ，而且 `Systemd` 更强大<br>参考文档：[Cgroups 与 Systemd](https://www.cnblogs.com/sparkdev/p/9523194.html "Cgroups 与 Systemd")
- 日志文件官方教程：[JSON File logging driver](https://docs.docker.com/config/containers/logging/json-file/ "JSON File logging driver")

创建文件夹

```bash
mkdir -p /etc/docker
```

编辑配置文件

```bash
vim /etc/docker/daemon.json
```

修改为如下内容

```json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
  }
}
```

刷新

```bash
systemctl daemon-reload
```

### 开启 Docker 服务，开启开机自启

```bash
# 默认已启动，修改配置后需要重启
systemctl restart docker
# 设置开机自启
systemctl enable docker
```

### 运行 hello-world 验证是否正确安装

执行以下脚本

```bash
docker run hello-world
```

查看到如下类似内容

```
Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/
```

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