2017年4月23日 01:06:45go评论87阅读模式

英文:

Heroku cleardb connection default addr for network unknown

问题

我已经为我的应用程序创建了一个免费的Heroku cleardb实例。我将数据库URL设置为：

heroku config:set DATABASE_URL='mysql://user:pass@us-cdbr-iron-east-03.cleardb.net/heroku_database?reconnect=true'

我正在尝试使用Go应用程序进行连接。但是当我尝试访问我的应用程序时，它显示以下mysql错误：

default addr for network 'us-cdbr-iron-east-03.cleardb.net' unknown

我尝试使用协议和端口设置数据库URL：

heroku config:set DATABASE_URL='mysql://user:pass@tcp(us-cdbr-iron-east-03.cleardb.net:3306)/heroku__database?reconnect=true'

这将错误更改为：

Access denied for user

我猜测这是因为禁止直接访问端口。有人知道这里的问题是什么吗？

英文:

I have created a free instance of Heroku cleardb instance for my app. I set the database URL as:

heroku config:set DATABASE_URL=&#39;mysql://user:pass@us-cdbr-iron-east-03.cleardb.net/heroku_database?reconnect=true&#39;

I'm trying to connect using a Go app. But when I try to access my application, it gives the following mysql error:

default addr for network &#39;us-cdbr-iron-east-03.cleardb.net&#39; unknown

I tried to set the database url with protocol and port as well:

heroku config:set DATABASE_URL=&#39;mysql://user:pass@tcp(us-cdbr-iron-east-03.cleardb.net:3306)/heroku__database?reconnect=true&#39;

This changes the errror to:

Access denied for user

which i'm guessing is because direct access to port is disallowed. Does anybody know what is the issue here?

答案1

得分: 7

这是一个特定于Go的问题。需要进行三个更改：

因此，最终的数据库URL应为：

DATABASE_URL='user:pass@tcp(us-cdbr-iron-east-03.cleardb.net:3306)/your_heroku_database'

英文:

This is a Go specific problem. Three changes are required:

Go's sql.Open already takes scheme as its first parameter so it needs to be stripped off of DATABASE_URL.
Connection string shouldn't have any query parameters (remove ?reconnect=true).
Protocol (tcp) and port (3306 for MySQL) number are required.

Thus final database URL would be:

DATABASE_URL=&#39;user:pass@tcp(us-cdbr-iron-east-03.cleardb.net:3306)/your_heroku_database&#39;

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