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## Debian 安装 Docker CE ### 准备工作 #### 系统要求 Docker CE 支持以下版本的 [Debian](https://www.debian.org/intro/about) 操作系统: - Stretch 9 - Jessie 8 (LTS) - Wheezy 7.7 (LTS) #### 卸载旧版本 旧版本的 Docker 称为 `docker` 或者 `docker-engine`,使用以下命令卸载旧版本: ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo apt</span><span class="pun">-</span><span class="pln">get remove docker \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> docker</span><span class="pun">-</span><span class="pln">engine \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> docker</span><span class="pun">.</span><span class="pln">io</span></code></li> </ol> ``` #### Debian 7 Wheezy Debian 7 的内核默认为 3.2,为了满足 Docker CE 的需求,应该安装 [`backports`](https://backports.debian.org/Instructions/) 的内核。 ### 使用 APT 安装 由于 apt 源使用 HTTPS 以确保软件下载过程中不被篡改。因此,我们首先需要添加使用 HTTPS 传输的软件包以及 CA 证书。 Debian 8 Jessie 或者 Debian 9 Stretch 使用以下命令: ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo apt</span><span class="pun">-</span><span class="pln">get update</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo apt</span><span class="pun">-</span><span class="pln">get install \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> apt</span><span class="pun">-</span><span class="pln">transport</span><span class="pun">-</span><span class="pln">https \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> ca</span><span class="pun">-</span><span class="pln">certificates \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> curl \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> gnupg2 \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> lsb</span><span class="pun">-</span><span class="pln">release \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> software</span><span class="pun">-</span><span class="pln">properties</span><span class="pun">-</span><span class="pln">common</span></code></li> </ol> ``` Debian 7 Wheezy 使用以下命令: ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo apt</span><span class="pun">-</span><span class="pln">get update</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo apt</span><span class="pun">-</span><span class="pln">get install \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> apt</span><span class="pun">-</span><span class="pln">transport</span><span class="pun">-</span><span class="pln">https \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> ca</span><span class="pun">-</span><span class="pln">certificates \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> curl \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> lsb</span><span class="pun">-</span><span class="pln">release \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> python</span><span class="pun">-</span><span class="pln">software</span><span class="pun">-</span><span class="pln">properties</span></code></li> </ol> ``` 鉴于国内网络问题,强烈建议使用国内源,官方源请在注释中查看。 为了确认所下载软件包的合法性,需要添加软件源的 GPG 密钥。 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ curl </span><span class="pun">-</span><span class="pln">fsSL https</span><span class="pun">://</span><span class="pln">mirrors</span><span class="pun">.</span><span class="pln">ustc</span><span class="pun">.</span><span class="pln">edu</span><span class="pun">.</span><span class="pln">cn</span><span class="pun">/</span><span class="pln">docker</span><span class="pun">-</span><span class="pln">ce</span><span class="pun">/</span><span class="pln">linux</span><span class="pun">/</span><span class="pln">debian</span><span class="pun">/</span><span class="pln">gpg </span><span class="pun">|</span><span class="pln"> sudo apt</span><span class="pun">-</span><span class="pln">key add </span><span class="pun">-</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="com"># 官方源</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="com"># $ curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -</span></code></li> </ol> ``` 然后,我们需要向 `source.list` 中添加 Docker CE 软件源: ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo add</span><span class="pun">-</span><span class="pln">apt</span><span class="pun">-</span><span class="pln">repository \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> </span><span class="str">"deb [arch=amd64] https://mirrors.ustc.edu.cn/docker-ce/linux/$(. /etc/os-release; echo "</span><span class="pln">$ID</span><span class="str">") \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="str"> $(lsb_release -cs) \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="str"> stable"</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="com"># 官方源</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="com"># $ sudo add-apt-repository \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="com"># "deb [arch=amd64] https://download.docker.com/linux/debian \</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="com"># $(lsb_release -cs) \</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="com"># stable"</span></code></li> </ol> ``` > 以上命令会添加稳定版本的 Docker CE APT 镜像源,如果需要最新或者测试版本的 Docker CE 请将 stable 改为 edge 或者 test。从 Docker 17.06 开始,edge test 版本的 APT 镜像源也会包含稳定版本的 Docker CE。 Debian 7 需要进行额外的操作: 编辑 `/etc/apt/sources.list` 将 deb-src 一行删除或者使用 # 注释。 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">deb</span><span class="pun">-</span><span class="pln">src </span><span class="pun">[</span><span class="pln">arch</span><span class="pun">=</span><span class="pln">amd64</span><span class="pun">]</span><span class="pln"> https</span><span class="pun">://</span><span class="pln">download</span><span class="pun">.</span><span class="pln">docker</span><span class="pun">.</span><span class="pln">com</span><span class="pun">/</span><span class="pln">linux</span><span class="pun">/</span><span class="pln">debian wheezy stable</span></code></li></ol> ``` #### 安装 Docker CE 更新 apt 软件包缓存,并安装 `docker-ce`。 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo apt</span><span class="pun">-</span><span class="pln">get update</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo apt</span><span class="pun">-</span><span class="pln">get install docker</span><span class="pun">-</span><span class="pln">ce</span></code></li> </ol> ``` ### 使用脚本自动安装 在测试或开发环境中 Docker 官方为了简化安装流程,提供了一套便捷的安装脚本,Debian 系统上可以使用这套脚本安装: ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ curl </span><span class="pun">-</span><span class="pln">fsSL get</span><span class="pun">.</span><span class="pln">docker</span><span class="pun">.</span><span class="pln">com </span><span class="pun">-</span><span class="pln">o get</span><span class="pun">-</span><span class="pln">docker</span><span class="pun">.</span><span class="pln">sh</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo sh get</span><span class="pun">-</span><span class="pln">docker</span><span class="pun">.</span><span class="pln">sh </span><span class="pun">--</span><span class="pln">mirror </span><span class="typ">Aliyun</span></code></li> </ol> ``` 执行这个命令后,脚本就会自动的将一切准备工作做好,并且把 Docker CE 的 Edge 版本安装在系统中。 ### 启动 Docker CE ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo systemctl enable docker</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo systemctl start docker</span></code></li> </ol> ``` Debian 7 Wheezy 请使用以下命令启动 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo service docker start</span></code></li></ol> ``` ### 建立 docker 用户组 默认情况下,`docker` 命令会使用 [Unix socket](https://en.wikipedia.org/wiki/Unix_domain_socket) 与 Docker 引擎通讯。而只有 `root` 用户和 `docker` 组的用户才可以访问 Docker 引擎的 Unix socket。出于安全考虑,一般 Linux 系统上不会直接使用 `root` 用户。因此,更好地做法是将需要使用 `docker` 的用户加入 `docker` 用户组。 建立 `docker` 组: ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo groupadd docker</span></code></li></ol> ``` 将当前用户加入 `docker` 组: ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ sudo usermod </span><span class="pun">-</span><span class="pln">aG docker $USER</span></code></li></ol> ``` 退出当前终端并重新登录,进行如下测试。 ### 测试 Docker 是否安装正确 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">$ docker run hello</span><span class="pun">-</span><span class="pln">world</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">Unable</span><span class="pln"> to find image </span><span class="str">'hello-world:latest'</span><span class="pln"> locally</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">latest</span><span class="pun">:</span><span class="pln"> </span><span class="typ">Pulling</span><span class="pln"> from library</span><span class="pun">/</span><span class="pln">hello</span><span class="pun">-</span><span class="pln">world</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln">ca4f61b1923c</span><span class="pun">:</span><span class="pln"> </span><span class="typ">Pull</span><span class="pln"> complete</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">Digest</span><span class="pun">:</span><span class="pln"> sha256</span><span class="pun">:</span><span class="pln">be0cd392e45be79ffeffa6b05338b98ebb16c87b255f48e297ec7f98e123905c</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">Status</span><span class="pun">:</span><span class="pln"> </span><span class="typ">Downloaded</span><span class="pln"> newer image </span><span class="kwd">for</span><span class="pln"> hello</span><span class="pun">-</span><span class="pln">world</span><span class="pun">:</span><span class="pln">latest</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">Hello</span><span class="pln"> from </span><span class="typ">Docker</span><span class="pun">!</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">This</span><span class="pln"> message shows that your installation appears to be working correctly</span><span class="pun">.</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">To</span><span class="pln"> generate this message</span><span class="pun">,</span><span class="pln"> </span><span class="typ">Docker</span><span class="pln"> took the following steps</span><span class="pun">:</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> </span><span class="lit">1.</span><span class="pln"> </span><span class="typ">The</span><span class="pln"> </span><span class="typ">Docker</span><span class="pln"> client contacted the </span><span class="typ">Docker</span><span class="pln"> daemon</span><span class="pun">.</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> </span><span class="lit">2.</span><span class="pln"> </span><span class="typ">The</span><span class="pln"> </span><span class="typ">Docker</span><span class="pln"> daemon pulled the </span><span class="str">"hello-world"</span><span class="pln"> image from the </span><span class="typ">Docker</span><span class="pln"> </span><span class="typ">Hub</span><span class="pun">.</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> </span><span class="pun">(</span><span class="pln">amd64</span><span class="pun">)</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> </span><span class="lit">3.</span><span class="pln"> </span><span class="typ">The</span><span class="pln"> </span><span class="typ">Docker</span><span class="pln"> daemon created a new container from that image which runs the</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> executable that produces the output you are currently reading</span><span class="pun">.</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> </span><span class="lit">4.</span><span class="pln"> </span><span class="typ">The</span><span class="pln"> </span><span class="typ">Docker</span><span class="pln"> daemon streamed that output to the </span><span class="typ">Docker</span><span class="pln"> client</span><span class="pun">,</span><span class="pln"> which sent it</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> to your terminal</span><span class="pun">.</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">To</span><span class="pln"> try something more ambitious</span><span class="pun">,</span><span class="pln"> you can run an </span><span class="typ">Ubuntu</span><span class="pln"> container with</span><span class="pun">:</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> $ docker run </span><span class="pun">-</span><span class="pln">it ubuntu bash</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">Share</span><span class="pln"> images</span><span class="pun">,</span><span class="pln"> automate workflows</span><span class="pun">,</span><span class="pln"> and more with a free </span><span class="typ">Docker</span><span class="pln"> ID</span><span class="pun">:</span></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> https</span><span class="pun">://</span><span class="pln">cloud</span><span class="pun">.</span><span class="pln">docker</span><span class="pun">.</span><span class="pln">com</span><span class="pun">/</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="typ">For</span><span class="pln"> more examples and ideas</span><span class="pun">,</span><span class="pln"> visit</span><span class="pun">:</span></code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"><span class="pln"> https</span><span class="pun">://</span><span class="pln">docs</span><span class="pun">.</span><span class="pln">docker</span><span class="pun">.</span><span class="pln">com</span><span class="pun">/</span><span class="pln">engine</span><span class="pun">/</span><span class="pln">userguide</span><span class="pun">/</span></code></li> </ol> ``` 若能正常输出以上信息,则说明安装成功。 ### 镜像加速 鉴于国内网络问题,后续拉取 Docker 镜像十分缓慢,强烈建议安装 Docker 之后配置 [国内镜像加速](%24mirror.md)。 ### 参考文档 - [Docker 官方 Debian 安装文档](https://docs.docker.com/engine/installation/linux/docker-ce/debian/)