建立自己的形象后运行码头工人 [英] Run docker after building own image

问题描述

在上一篇文章之后，建议创建我自己的Docker镜像，我想用红宝石制作jenkins，所以我的docker文件看起来像

  FROM jenkins 
 FROM ruby​​：2.3.0 
  

我运行 docker build -t jenkins_ruby。

它正确构建，当我执行 docker时，我可以看到图像图片

  REPOSITORY TAG IMAGE ID CREATED SIZE 
 jenkins最新77bd697ef2c3 5天前710.1 MB 
 jenkins_ruby最新1653f4c3a826 8天前729 MB 
 ruby​​最新1653f4c3a826 8天前729 MB 
  

所以我想在容器中运行这个图像 docker run -p 8080：8080 jenkins_ruby

但我得到切换到检查模式。

我期待g可以去 ipaddress：8080 并查看jenkins控制台

我错过了什么吗？ p>

谢谢

解决方案

Dockerfile不能有多个 FROM s。

这种基本上将两个图像合并在一起的功能不能在单个Docker文件中完成。所有这一切真的发生在这里，它将拉取 jenkins：最新的图像，拉$ ruby​​：2.3.0 image然后用 jenkins_ruby 标记 ruby​​ 图像。没有合并发生，您可以看到，与图像最终大小也一样， jenkins_ruby 的大小与 ruby​​ 。

有一个Github问题来备份这个这里。

After a previous post it was suggested to create my own Docker image, I wanted to have jenkins with ruby, so my dockerfile looks like

FROM jenkins
FROM ruby:2.3.0

I run docker build -t jenkins_ruby .

It builds correctly and i can see the image when i do docker images

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
jenkins             latest              77bd697ef2c3        5 days ago          710.1 MB
jenkins_ruby        latest              1653f4c3a826        8 days ago          729 MB
ruby                latest              1653f4c3a826        8 days ago          729 MB

So i then want to run this image in a container docker run -p 8080:8080 jenkins_ruby

but i get Switch to inspect mode.

I was expecting to be able to go to ipaddress:8080 and see the jenkins console

Have i missed something?

Thanks

解决方案

A Dockerfile cannot have multiple FROMs.

This type of functionality to essentially merge two images together cannot be done in a single Dockerfile. All that's really happening here is that it will pull the jenkins:latest image, pull the ruby:2.3.0 image and then tag the ruby image with jenkins_ruby. There is no merging occurring, you can see that with the image final sizes too, jenkins_ruby has an identical size to ruby.

There's a Github issue to back this up here.

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