连接mysql提示 ‘xxx.xxx.com‘ is not allowed to connect to this MySQL serverConnection closed by

原因是mysql拒绝了连接：
需要在mysql中对xxx.xxx.com主机名的访问进行授权

查看下有没有该主机名/IP

SELECT User, Host FROM mysql.user;

没有的话，执行授权，xxx.xxx.com可以替换成IP地址。

CREATE USER 'root'@'xxx.xxx.com' IDENTIFIED BY '密码';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'xxx.xxx.com' WITH GRANT OPTION;
FLUSH PRIVILEGES;