docker

<!--
* @Author: starkwang
* @Contact me: https://shudong.wang/about
* @Date: 2019-11-18 13:33:57
* @LastEditors: starkwang
* @LastEditTime: 2019-11-18 20:25:47
* @Description: file content
-->
## Hello world
https://docs.docker.com/engine/reference/run/
```
docker run ubuntu echo hello docker
```
和运行虚拟机相比，是很快的
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##  启动一个简单的容器
```
docker run -p 8080:80 -d nginx
```
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#### summary
docker pull 获取image
docker build 创建image
docker run 运行container
docker ps 列出container
docekr images || docker image ls 列出镜像
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## 永久保存
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## 使用Dockerfile启动
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docker run -d -p 8000:80 stark_nginx
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## docker-compose
https://docs.docker.com/compose/reference/overview/
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## lnmp
https://github.com/devdocker/lnmp
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## 构建技巧
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## 坑：docker-compose 缓存
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服务器，空间会满
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批量删除镜像
docker rmi $(docker images | grep "^<none>" | awk "{print $3}")
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没有构建 读取缓存
docker build