在dockerfile中自定义ONBUILD环境 [英] Customize ONBUILD environment in a dockerfile

问题描述

我正在稍微修改此Dockerfile 以支持我的特定用例:我需要指定我自己的 PyPi 服务器，我们将在其中发布内部库.通常，可以通过指定 pip.conf 文件或将命令行选项传递给 pip 来实现.

I am slightly modifying this Dockerfile to support my specific usecase: I need to specify my own PyPi server, where we are publishing our internal libraries. This can normally be achieved by specifying a pip.conf file, or by passing command line options to pip.

我正在尝试:

FROM python:3.5

RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

ONBUILD COPY requirements.txt /usr/src/app/

# 1st try: set the env variable and use it implicitely. Does not work!
# ENV PIP_CONFIG_FILE pip.conf
# ONBUILD RUN pip install --no-cache-dir -r requirements.txt

# 2nd try: set once the env variable, just for this command. Does not work!
# ONBUILD RUN PIP_CONFIG_FILE=pip.conf pip install --no-cache-dir -r requirements.txt

# 3rd try: directly configure pip. Works, but these values should not be set in the Dockerfile!
ONBUILD RUN pip install --index-url http://xx.xx.xx.xx:yyyyy --trusted-host xx.xx.xx.xx --no-cache-dir -r requirements.txt

ONBUILD COPY . /usr/src/app

我的 pip.conf 非常简单，并且可以在 Docker 之外使用时工作:

My pip.conf is very simple, and works when used outside Docker:

[global]
timeout = 60
index-url = http://xx.xx.xx.xx:yyyyy
trusted-host = xx.xx.xx.xx

链接:

• Dockerfile 的ENV已记录在此处
• pip 配置在此处

• Dockerfile's ENV is documented here
• pip configuration is documented here

我有以下问题:

• 为什么 ENV 不起作用?
• 为什么在 RUN 命令中显式设置变量无效?
• ONBUILD 还是那些问题，或者也许是 RUN ?

• Why is ENV not working?
• Why is explicit setup of the variable in a RUN command not working?
• Are those problems with ONBUILD, or maybe RUN?

推荐答案

我遇到了同样的问题，并且设法解决了这个问题，并将其添加到Dockerfile中:

I was having the same problem and I managed to fix it adding this to the Dockerfile:

COPY pip.conf pip.conf
ENV PIP_CONFIG_FILE pip.conf
RUN pip install <my_package_name>

pip.conf文件具有以下结构:

The pip.conf file has the next structure:

[global]
timeout = 60
index-url = https://pypi.org/simple
trusted-host = pypi.org
               <my_server_page>
extra-index-url = https://xxxx:yyyy@<my_server_page>:<package_location>

这是我为Docker找到的唯一从pypi服务器中找到软件包的方法.我希望这种解决方案是通用的，并且可以帮助其他有此问题的人.

This is the only way I found for Docker to find the package from the pypi server. I hope this solution is general and helps other people having this problem.

这篇关于在dockerfile中自定义ONBUILD环境的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！