在Docker Entrypoint中引用动态参数 [英] Referencing a dynamic argument in the Docker Entrypoint

问题描述

我要运行这样的docker容器:

I want to run a docker container like this:

docker run --rm -it -v volume1:/target -v volume2:/backup duplicity-image backup-label

这将导致以下入口点被执行:

This would cause the following Entrypoint do get executed:

duplicity /target file:///backup/$backup-label

所以我的问题是如何构造ENTRYPOINT以便它可以解析$backup-label以及如何在其中传递backup-label ...我是否需要在其周围使用单引号... ...?

So my question is how do I structure the ENTRYPOINT such that it can resolve the $backup-label and how do I pass the backup-label in ... Do I need single quotes around it ... a dash in front of it ...?

TIA， 奥莱(Ole)

TIA, Ole

推荐答案

当图像中包含ENTRYPOINT脚本时，该脚本将接收docker run命令行中图像之后传递的所有参数.也就是说，如果您有:

When you have an ENTRYPOINT script in your image, that script will receive any arguments passed after the image on the docker run command line. That is, if you have:

ENTRYPOINT /path/to/my/script.sh

然后您运行:

docker run myimage one two three

您的ENTRYPOINT脚本将被命名为:

/path/to/my/script.sh one two three

从那时起，就像编写任何其他带参数的shell脚本一样:

From that point on, it's just like writing any other shell script that takes arguments:

#!/bin/sh

backup_label=$1
duplicity /target file:///backup/$backup_label

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