Docker是什么？

Docker是一个虚拟环境容器，可以将你的开发环境、代码、配置文件等一并打包到这个容器中，并发布和应用到任意平台中。

官方文档：https://docs.docker.com

Homebrew安装

Homebrew的Cask已经支持Docker for Mac，因此可以方便的使用Homebrew Cask来进行安装。

?  ~ brew cask install docker
==> Tapping homebrew/cask
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask'...
remote: Enumerating objects: 4197, done.
remote: Counting objects: 100% (4197/4197), done.
remote: Compressing objects: 100% (4178/4178), done.
remote: Total 4197 (delta 26), reused 661 (delta 16), pack-reused 0
Receiving objects: 100% (4197/4197), 1.33 MiB | 931.00 KiB/s, done.
Resolving deltas: 100% (26/26), done.
Tapped 1 command and 4098 casks (4,207 files, 4.2MB).
==> Satisfying dependencies
==> Downloading https://download.docker.com/mac/stable/30215/Docker.dmg
######################################################################## 100.0%
==> Verifying SHA-256 checksum for Cask 'docker'.
==> Installing Cask docker
==> Moving App 'Docker.app' to '/Applications/Docker.app'.
??  docker was successfully installed!

安装完成之后，桌面有一个小鲸鱼icon,双击就可以启动docker.

docker简单验证

1、基本信息查看

?  ~ docker --version
Docker version 18.09.1, build 4c52b90
?  ~ docker-compose --version
docker-compose version 1.23.2, build 1110ad01
?  ~ docker-machine --version
docker-machine version 0.16.1, build cce350d7
?  ~ docker info
Containers: 0
 Running: 0

2、运行nginx服务器：

docker run -d -p 80:80 --name webserver nginx

3、停止删除Nginx服务器

?  ~ docker stop webserver
webserver
?  ~ docker rm webserver
webserver

4、镜像下载

docker pull katalonstudio/katalon

5、查看运行的镜像

docker images