我使用Amazon RDS为有史以来第一次，我一直在关注Heroku的文档获取使用RDS实例，我的应用程序。到目前为止，我已经创建了一个实例，我已经安装使用格式的插件：

I'm using Amazon RDS for the first time ever and I've been following the heroku docs to get my app using the RDS instance. So far I've created an instance and I have setup the addon using the format:

$ heroku addons:add amazon_rds url=mysql://user:pass@rdshostname.amazonaws.com/databasename

运行的Heroku耙分贝后：迁移我

After running heroku rake db:migrate I got

！捆绑mysql.rb驱动耙   中止！没有这样的文件加载 - MySQL的

!!! The bundled mysql.rb driver rake aborted! no such file to load -- mysql

因此​​，我安装了MySQL的宝石。做同样的事情，我再次得到了错误：

So I installed the MySQL gem. Doing the same thing again I got the error:

无法连接到MySQL服务器上   myapp.cqslpaxxqrok.eu-west-1.rds.amazonaws.com   （110）

Can't connect to MySQL server on 'myapp.cqslpaxxqrok.eu-west-1.rds.amazonaws.com' (110)

我看到有一张纸条有关在美国东部地区的实例是为Heroku的安全组控制访问什么的。我无法用欧洲的实例？

I see there's a note about the instance being in the US-east region for Heroku's security group to control access or something. Can I not use a European instance?

推荐答案

Heroku的改变了它的过程，使Heroku的服务器连接到RDS实例。在接受了这个问题的答案是不正确的了。

Heroku changed its procedure to allow Heroku servers to connect to RDS instances. The accepted answer to this question is not true anymore.

您已经授予的Heroku dynos访问您的RDS实例。推荐的方法做，这是配置RDS实例只接受SSL加密连接和配置安全组为您的实例，从所有IP地址允许进入。

You have to grant Heroku dynos access to your RDS instance. The recommended way to do this is to configure the RDS instance to only accept SSL-encrypted connections and configure the security group for your instance to permit ingress from all IPs.

previously，Heroku上公布了其AWS账户ID和安全组的名称，以此来访问权限授予一个AWS RDS实例。 此不再推荐使用。

Previously, Heroku published its AWS account ID and security group name as a way to grant access to an AWS RDS instance. This is no longer recommended.

参考： https://devcenter.heroku.com/articles/amazon_rds