1. 什么是镜像分层

2. 镜像分类

   1.一种是类似centos这样的基础镜像，称为基础或根镜像。这些镜像是由Docker公司创建、验证、支持、提供。这样的镜像往往使用单个单词作为名字
   2.还有一种类型，比如ansible/centos7-ansible镜像，它是由Docker用户ansible创建并维护的，带有用户名称为前缀，表明是某用户下的某仓库
   

3. 数据管理

   1.数据卷（Data Volumes）：容器内数据直接映射到本地主机环境
   2.数据卷容器（Data Volume Containers）：使用特定容器维护数据卷
   

4. 端口映射以及容器和容器之间互相访问

5. Dockerfile

   A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.
   
   Dockerfile分为四部分：基础镜像信息、维护者信息、镜像操作指令和容器启动时执行指令
   

   • The instruction is not case-sensitive. However, convention is for them to be UPPERCASE to distinguish them from arguments more easily.

   • Docker runs instructions in a Dockerfile in order. A Dockerfile must begin with a FROM instruction

   • Docker treats lines that begin with # as a comment. A # marker anywhere else in a line is treated as an argument.

   • There can only be one CMD instruction in a Dockerfile. If you list more than one CMD then only the last CMD will take effect.

6. Docker Compose. Compose is a tool for defining and running multi-container Docker applications. With Compose, you use a YAML file to configure your application’s services. Then, with a single command, you create and start all the services from your configuration.

   Using Compose is basically a three-step process:

   1. Define your app’s environment with a Dockerfile so it can be reproduced anywhere.
   2. Define the services that make up your app in docker-compose.yml so they can be run together in an isolated environment.
   3. Run docker-compose up and Compose starts and runs your entire app

8.ewrwer 9.dfsdfsd 10.dfdsf 11.dsfsd 12.sdfsdf 13.sdfsd 14.

项目引入

个人觉着本质就是对于生命周期的理解

1. 项目是使用maven构建，所以找maven插件，找到了这个Dockerfile Maven,也发现了一个中文翻译的VERSION；配置本身很简单，但是要明白maven本身的构建生命周期呀这些东西，如何将docker嵌入进去。

参考

• Docker技术入门与实战（第二版）
• https://docs.docker.com/

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本文由 发表于 2020-08-14 17:47:50

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