用于 Python 变量的 Docker ENV [英] Docker ENV for Python variables

问题描述

刚接触 python &docker，我创建了一个小烧瓶应用程序 (test.py)，它有两个硬编码值:

Being new to python & docker, I created a small flask app (test.py) which has two hardcoded values:

username = "test"
password = "12345"

我能够从以下 Dockerfile 创建一个 Docker 镜像并运行一个容器:

I'm able to create a Docker image and run a container from the following Dockerfile:

FROM python:3.6

RUN mkdir /code  
WORKDIR /code  
ADD . /code/  
RUN pip install -r requirements.txt  

EXPOSE 5000  
CMD ["python", "/code/test.py"]`

如何为用户名和创建 ENV 变量?运行容器时输入密码并传递动态值?

How can I create a ENV variable for username & password and pass dynamic values while running containers?

推荐答案

在你的 python 代码中，你可以读取环境变量，例如:

Within your python code you can read env variables like:

import os
username = os.environ['MY_USER']
password = os.environ['MY_PASS']
print("Running with user: %s" % username)

然后当你运行你的容器时，你可以设置这些变量:

Then when you run your container you can set these variables:

docker run -e MY_USER=test -e MY_PASS=12345 ... <image-name> ...

这将在容器内设置 env 变量，这些变量稍后将被 python 脚本(test.py)读取

This will set the env variable within the container and these will be later read by the python script (test.py)

有关os.environ 和docker env

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