ONBUILD部分的占位符字段用于子码头坞图像使用 [英] Placeholder field for the ONBUILD section for child docker images to use

问题描述

我们有几个使用base Image的子项目。代码看起来像这样。

从ubuntu

  ONBUILD ADD package .json / project / 
 ONBUILD RUN //做一些东西
 ONBUILD ADD。 / project 
  

问题是我有几个孩子图像有不同的文件夹名称（而不是项目 ）。另外，其中一个有多个项目文件夹。

所以当我在子图像中使用它时，我不能在执行ONBUILD之前创建该文件夹。这是有道理的，因为构建应属于基础图像。但是有没有办法推迟呢？另外，文件夹的名称可以是一个占位符，所以我将其替换为子图像。或者在这种情况下可能不适合使用ONBUILD？

非常感谢提前

解决方案

我刚刚遇到这个确切的问题，从文档中可以看出，它似乎没有办法推迟 onbuild stanzas连锁码头Dockerfiles，目前。它只会执行到其子Dockerfile。

从文档中：

执行后，触发器从最终的图像中清除。换句话说，它们不被大孩子的构建继承。

我倾向于建立一个边缘 '基本图像继承自基本图像，并且只添加必要的 onbuild 节。基本图像本身不会包含任何生成行。

We have several child projects which use base Image. The code looks like this.

From ubuntu

ONBUILD ADD package.json /project/  
ONBUILD RUN //do some stuff 
ONBUILD ADD . /project

The issue is that I have several child images which has different folder name (not "project"). Also, one of them has multiple project folders.

so when I use it in child image, I cant create the folder before ONBUILD executed. which makes sense and since the build should belong to base image. but is there a way I can defer it. Also, is the folder name can be a placeholder, so I will replace it in the child images. Or it may not be suitable to use ONBUILD in this scenario ?

Many thanks in advance

解决方案

I just ran into this exact issue, and judging from the docs, it doesn't look like there's a way to defer onbuild stanzas further down the chain of descendant Dockerfiles, currently. It only defers execution to its child Dockerfile.

From the docs:

Triggers are cleared from the final image after being executed. In other words they are not inherited by "grand-children" builds.

One solution I'm inclined towards is to build 'edge' base images which inherit from a base image, and only add the necessary onbuild stanzas. The base images themselves would not contain any onbuild lines.

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