如何在 docker 容器内使用 sudo? [英] How to use sudo inside a docker container?

问题描述

通常，docker 容器使用用户 root 运行.我想使用不同的用户，使用 docker 的 USER 指令没有问题.但是这个用户应该能够在容器内使用 sudo.缺少此命令.

Normally, docker containers are run using the user root. I'd like to use a different user, which is no problem using docker's USER directive. But this user should be able to use sudo inside the container. This command is missing.

这是一个用于此目的的简单 Dockerfile:

Here's a simple Dockerfile for this purpose:

FROM ubuntu:12.04

RUN useradd docker && echo "docker:docker" | chpasswd
RUN mkdir -p /home/docker && chown -R docker:docker /home/docker

USER docker
CMD /bin/bash

运行这个容器，我以用户docker"登录.当我尝试使用 sudo 时，找不到该命令.所以我尝试使用

Running this container, I get logged in with user 'docker'. When I try to use sudo, the command isn't found. So I tried to install the sudo package inside my Dockerfile using

RUN apt-get install sudo

这导致无法定位包 sudo

推荐答案

刚搞定.正如 regan 指出的那样，我必须将用户添加到 sudoers 组.但主要原因是我忘记更新存储库缓存，所以 apt-get 找不到 sudo 包.它现在正在工作.完整代码如下:

Just got it. As regan pointed out, I had to add the user to the sudoers group. But the main reason was I'd forgotten to update the repositories cache, so apt-get couldn't find the sudo package. It's working now. Here's the completed code:

FROM ubuntu:12.04

RUN apt-get update && 
      apt-get -y install sudo

RUN useradd -m docker && echo "docker:docker" | chpasswd && adduser docker sudo

USER docker
CMD /bin/bash

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