默认Docker入口点 [英] Default Docker entrypoint

问题描述

我正在从另一个设置了特定入口点的图像中创建一个图像。但是我希望我的图像具有默认图像。如何重置ENTRYPOINT？

I am creating an image from another image that set a specific entrypoint. However I want my image to have default one. How do I reset the ENTRYPOINT?

我尝试了以下Dockerfile：

I tried the following Dockerfile:

FROM some-image
ENTRYPOINT ["/bin/sh", "-c"]

不幸的是，它不像默认入口点那样工作，因为它需要用引号引起来。

Unfortunately it doesn't work like the default entrypoint as it need the command to be quoted.

docker run myimage ls -l /    # "-l /" arguments are ignored
file1 file2 file3             # files in current working directory

docker run myimage "ls -l /"  # works correctly

如何使用不带引号的命令？

How do I use commands without quoting?

推荐答案

要禁用现有的 ENTRYPOINT ，请在您的docker文件中设置一个空数组

To disable an existing ENTRYPOINT, set an empty array in your docker file

ENTRYPOINT []

然后您对的论点docker run 将正常执行。

Then your arguments to docker run will exec as normal.

您的 ENTRYPOINT [ / bin / sh， -c] 需要带引号的字符串的原因是，如果没有引号，则将 ls 的参数传递给 sh 。

The reason your ENTRYPOINT ["/bin/sh", "-c"] requires quoted strings is that without the quotes, the arguments to ls are being passed to sh instead.

不加引号导致许多参数发送到 sh

Unquoted results in lots of arguments being sent to sh

"/bin/sh", "-c", "ls", "-l", "/"

引用允许完整的命令（ sh -c ）作为一个传递给 sh

Quoting allows the complete command (sh -c) to be passed on to sh as one argument.

"/bin/sh", "-c", "ls -l /"

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