对Docker图像的构建环境非常大 [英] build context for docker image very large

问题描述

我在主机上创建了几个不同的目录，因为我尝试了解Docker只是为了保持我的dockerfiles的组织。我的Dockerfile我刚跑了，看起来像这样：

  FROM crystal / centos 
维护水晶
 
 ADD ./rpms/test.rpm ./rpms/ 
 RUN yum -y --nogpgcheck localinstall /rpms/test.rpm 
  

我的实际rpm只有1 GB。但是当我尝试执行 sudo docker build -t =crystal / test时，我发送构建上下文到Docker守护进程3.5 GB。有没有什么我不知道，因为你继续构建Docker图像？当我在主机上的其他目录中构建更多图像时，我的内存是否累积？

解决方案

Docker客户端将整个构建上下文发送到Docker守护程序。该构建上下文（默认情况下）是 Dockerfile 所在的整个目录（因此，整个 rpms 树）。

您可以设置 .dockerignore 文件让Docker忽略一些文件。您可能需要尝试一下。

或者，您可以将 rpms code> Dockerfile ，只有符号链接 test.rpm 到 Dockerfile s目录。

I have created a couple different directories on my host machine as I try to learn about Docker just to keep my dockerfiles organized. My Dockerfile I just ran looks like this:

FROM crystal/centos
MAINTAINER crystal

ADD ./rpms/test.rpm ./rpms/ 
RUN yum -y --nogpgcheck localinstall /rpms/test.rpm 

My actual rpm is only 1 GB. But when I try to do sudo docker build -t="crystal/test" ., I get sending build context to Docker daemon 3.5 GB. Is there something else that I'm unaware of as you continue to build Docker images? Is my memory accumulating as I build more images in my other directories on my host machine?

解决方案

The Docker client sends the entire "build context" to the Docker daemon. That build context (by default) is the entire directory the Dockerfile is in (so, the entire rpms tree).

You can setup a .dockerignore file to get Docker to ignore some files. You might want to experiment with it.

Alternatively, you can move your rpms folder one directory level above your Dockerfile, and only symlink test.rpm into the Dockerfile's directory.

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