Docker RUN ls显示缓存的文件 [英] Docker RUN ls shows cached files

问题描述

我正在尝试设置一个docker容器，并使用 RUN ls 进行调试。但是，当我运行 RUN ls 时，码头工人会打印出以下内容：

I am trying to setup a docker container and am using RUN ls to help debug. However, when I run RUN ls, docker prints out the following:

 ---> Using cache
 ---> 96223b1b0748

我希望它注销该文件夹中的文件。有人知道怎么回事吗？

I am expecting it to log out files in the folder. Does anyone know what might be happening?

这是我完整的Dockerfile：

Here is my full Dockerfile:

FROM node:latest 

WORKDIR /app

COPY app .

RUN ls

谢谢！

推荐答案

Docker缓存最近构建的层，以便后续构建可以重用它们。

Docker caches recently built layers so that subsequent builds can reuse them.

最简单的方法打破这种行为是在构建过程中使用-no-cache 标志：

The simplest way to break this behavior is to use the --no-cache flag during build:

docker build --no-cache ...

但是，这会使所有缓存层失效。如果您仍想在 RUN ls 指令之前为图层使用缓存的图层，则可以在其前面放置以下行：

However this will invalidate all cached layers. If you still want to use cached layers for layers before the RUN ls instruction, you can put the following line before it:

ARG CACHE_TS=default_ts

然后给出此参数每个新构建的新值：

And then gives this argument a new value on every new build:

docker build --build-arg CACHE_TS=$(date +%s) ...

请参阅以下Github问题： https://github.com/moby/moby/issues/22832

Please see this Github issue: https://github.com/moby/moby/issues/22832

这篇关于Docker RUN ls显示缓存的文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！