AWS Aurora：MySQL 服务器正在使用 --read-only 选项运行，因此无法执行此语句

Question

I am getting this error when executing a GRANT statement on my Aurora DB instance in AWS:

The MySQL server is running with the --read-only option so it cannot execute this statement

My user is not read-only though, so why is this happening?

Answer 1

It turned out to be a silly mistake, but posting it anyway in case anyone else has the problem:

I was accessing the replica instance by mistake - I had copied the endpoint for the replica, and it is read-only apparently. So if you have this problem, verify that you are connecting to the Primary Instance or best of all the DB Cluster endpoint.

Edit: According to @Justin's answer we definitely should use DB Cluster:

You need to connect to the cluster, rather than an instance. This is because instances seem to take a turn to be the readers and writers.

Answer 2

You need to connect to the cluster , rather than an instance . This is because instances seem to take a turn to be the readers and writers.

Answer 3

In my case, I was receiving this error after performing a Blue/Green failover in a Test environment. I was trying to access the Blue database, in order to confirm the process for reverting back to Blue database should that be required later.

Accessing Blue via the cluster address yielded this error, as did attempting to use the direct links to the Blue "reader" and "writer" instances. In the end, I performed a failover of the Blue "reader" and "writer" instances, after which the cluster address was in a working state again.

tl;dr

Try a failover of the "writer".