mysql远程连接虚拟机数据库报错2003（docker虚拟机防火墙没关）

今日坑：

https://blog.csdn.net/weixin_43025071/article/details/88603053

查看防火墙状态：systemctl status firewalld

关闭防火墙：systemctl stop firewalld

开启防火墙：systemctl start firewalld

设置开机自动关闭防火墙：systemctl start firewalld