在多次运行Docker图像时传递不同的参数 [英] Passing Different Arguments When Running Docker Image Multiple Times

问题描述

Dockerfile具有以下功能：

  WORKDIRmydir / build
 CMD ./maker oneapp> /artifacts/oneapp_$1.log; ./maker twoapp> /artifacts/twoapp_$1.log; ./maker -j13 threeapp> /artifacts/threeapp_$1.log 
  

我将多次运行相同的Docker Image，所以我需要日志根据需要保存在_0，_1，_2，_3附加的/工件中。

我尝试在Docker文件中保留此内容，但是不要在运行docker的时候将此全线作为参数传递。

ENTRYPOINT [/ bin / bash]

。 > /artifacts/oneapp_$1.log; ./maker twoapp>
/artifacts/twoapp_$1.log; ./maker -j13 threeapp>
/artifacts/threeapp_$1.log

有可能吗？在Dockerfile中需要修改什么来做我想要的？

解决方案

只需将参数注入ENV。

声明 <$ c $您的Docker文件中的c> ENV 。

  ENV后缀0 
 ./maker oneapp> /artifacts/oneapp_${suffix}.log 
  

环境变量集使用 ENV 将在从生成的映像运行容器时持续。

您可以使用 docker inspect ，并使用 docker run --env< key> =< value> 更改它们。

这样，你可以声明上的nofollow noreferrer> ENV ，并从运行容器中的值获益。

操作员可以通过使用一个或多个-e标志来设置容器中的任何环境变量，甚至覆盖上面提到的那些，或者已经由开发人员使用Dockerfile定义了ENV：

在您的情况下，例如：

  docker run -e后缀= 2< image_name> 
  

I need to give an argument while running Docker Image which will be a number from 0-3.

Dockerfile has the following:

WORKDIR "mydir/build"
CMD ./maker oneapp > /artifacts/oneapp_$1.log ; ./maker twoapp > /artifacts/twoapp_$1.log ; ./maker -j13 threeapp > /artifacts/threeapp_$1.log

I will be running the same Docker Image multiple times so I need logs to be saved in /artifacts appended with _0, _1, _2, _3, as appropriate.

I tried keeping this in Docker file but don't want to pass this full line as argument while running docker.

ENTRYPOINT ["/bin/bash"]

./maker oneapp > /artifacts/oneapp_$1.log ; ./maker twoapp > /artifacts/twoapp_$1.log ; ./maker -j13 threeapp > /artifacts/threeapp_$1.log

Is it possible to do this? What do I need to modify in Dockerfile to do what I want?

解决方案

Simply inject your parameter as an ENV.

Declare an ENV in your Dockerfile.

ENV suffix 0
./maker oneapp > /artifacts/oneapp_${suffix}.log

The environment variables set using ENV will persist when a container is run from the resulting image.
You can view the values using docker inspect, and change them using docker run --env <key>=<value>.

That way, you can declare that ENV on docker run, and benefit from its value in the running container.

the operator can set any environment variable in the container by using one or more -e flags, even overriding those mentioned above, or already defined by the developer with a Dockerfile ENV:

In your case, for instance:

docker run -e suffix=2 <image_name>

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