Docker学习笔记

Docker中的重要概念

docker中有三个重要概念：

• 镜像 image
• 容器 container
• 仓库

其中初学者对前两者之间容易混淆。

镜像与仓库的区别

官方文档中的解释：

A container is launched by running an image.
An image is an executable package that includes everything needed to run an application–the code, a runtime, libraries, environment variables, and configuration files.
A container is a runtime instance of an image–what the image becomes in memory when executed (that is, an image with state, or a user process). You can see a list of your running containers with the command, docker ps, just as you would in Linux.

看资料时的零星记录：

1. image 文件可以看作是容器的模板。Docker 根据 image 文件生成容器的实例。
2. container中加载image，container则是images运行时的的状态，image被某个container拿来引用
3. 删除image，要先rm该image对应的container，再rmi该image
4. 我的本地主机就是docker的宿主机

参考资料

• 10张图带你深入理解Docker容器和镜像
• Docker入门教程