常见问题：
1、没有授权,
解决办法 ：grant create,drop,update,insert on t2.8* to root@'192.168.111.129' identifid by "123456";
flush privileges; #刷新权限
grant all on t2.* to root@'192.168.111.129' identified by "123456"; #对所有的库授权
grant all privileges on t2.* to root@'192.168.163.130' identified by '123456';