如何通过Azure DevOps在Dockerfile中设置环境变量 [英] How to set environment variables in Dockerfile via Azure DevOps

问题描述

在我的项目Docker文件中，我有一些环境变量，如下所示:

In my projects Docker file I have some environment variables, like this:

ENV ACCEPT_EULA=Y
ENV SA_PASSWORD=Password
ENV MSSQL_PID=Developer
ENV MSSQL_TCP_PORT=1433 

我想在此处将密码作为环境变量在我的管道中传递.

And I would like to pass the password here as an environment variable set in my pipeline.

在Azure DevOps中，我有两个管道.一种用于构建解决方案，另一种用于构建Docker镜像并将其推送到DockerHub.在这两个管道中都有设置变量的选项: 我已经在两个管道中都设置了密码，并在Dockerfile中编辑了密码，如下所示:

In Azure DevOps I have two pipelines. One for building the solution and one for building and pushing docker images to DockerHub. There are options to set variables in both these pipelines: I have set the password in both pipelines and edited my password in the Dockerfile to look like this:

ENV SA_PASSWORD=$(SA_PASSWORD)

但这似乎不起作用.将环境变量从Azure DevOps传递到Docker映像的正确方法是什么?

But that does not seem to be working. What is the correct way of passing environment variables from Azure DevOps into a Docker image?

这也是传递秘密的安全方法吗?有人可以从Docker映像中读取机密吗?

Also, is this a safe way of passing secrets? Is there any way someone could read secrets from a Docker image?

谢谢！

推荐答案

您可以设置ARG var_name并将ENV引用到ARG变量.然后您可以在Docker构建映像$ docker build --build-arg var_name=$(VARIABLE_NAME)

You can set an ARG var_name and reference ENV to the ARG variables. Then you can replace those variables when docker build the image $ docker build --build-arg var_name=$(VARIABLE_NAME)

例如在dockerfile中添加ARG，并使用ENV变量引用它:

For example the add ARG in dockerfile, and have the ENV variable refer to it:

ARG SECRET
ENV ACCEPT_EULA=Y
ENV SA_PASSWORD=$SECRET
ENV MSSQL_PID=Developer
ENV MSSQL_TCP_PORT=1433 

由于buildandpush命令不能接受参数，因此可以分别使用停靠构建任务和停靠推送任务.并在管道中设置变量SECRET.

You can use dock build task and dock push task separately, as buildandpush command cannot accept arguments. And set a variable SECRET in your pipeline.

设置构建参数SECRET= $(SECRET)来替换ARG秘密

The set the Build Arguments SECRET= $(SECRET) to replace the ARG SECRET

您还可以引用类似的 thread .

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