[英]Build the docker image with environment variables
so the objective is to have a different image for prod and testing so there are certain variables change accordingly so I need to set env variables during the build. 因此,目标是为产品和测试提供不同的图像,因此某些变量会相应更改,因此我需要在构建过程中设置env变量。
# Dockerfile
ENV Somename: $value
...
docker build --build-arg Somename=value -t test .
docker run -d -p port:port test
this work flow is not taking the env variables 这个工作流程没有采用env变量
First you need to consume the build-arg inside you dockerfile using the ARG
command. 首先,您需要使用
ARG
命令使用dockerfile内部的build-arg。
FROM alpine
# consume the build arg
ARG somename
# persist the env variable in the built image
ENV somename=$somename
# somename will appear as an env variable
RUN echo $somename
RUN env
And running the build command docker build --build-arg somename=hello .
并运行构建命令
docker build --build-arg somename=hello .
will show you an env variable somename=hello
将显示一个环境变量
somename=hello
your syntax is not correct, do not put 你的语法不正确,不要放
:
it is either 要么是
ENV somename somevalue
or 要么
ENV somename=somevalue
Check the doc 检查文件
https://docs.docker.com/engine/reference/builder/#env https://docs.docker.com/engine/reference/builder/#env
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