下载mysql镜像
[root@localhost ~]# docker pull mysql:5.5.59
创建mysql容器
[root@localhost ~]# docker run -itd --name mysql -p 3309:3306 --restart=always -e MYSQL_ROOT_PASSWORD=123456 mysql:5.5.59
-i,-interactive Keep STDIN open even if not attached -t,--tty Allocate a pseudo-TTY -d, --detach Run container in background and print container ID --name string Assign a name to the container -p,--publish list Publish a container's port(s) to the host --restart string Restart policy to apply when a container exits (default "no") -e ,--env list Set environment variables