'Beego ORM MySQL: default addr for network '...' unknown

My database link is a domain name instead of an IP address, and I don't use the ip address. Below is my configuration.

orm.RegisterDataBase("default", "mysql", "root:root@*******.aliyuncs.com:3308/dbname?charset=utf8")

Error Message:

register db Ping default, default addr for network '***.mysql.rds.aliyuncs.com:3308' unknown must have one register DataBase alias named default



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