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Georgy
Georgy

Reputation: 2462

RDS upgrade postgres version 13.1, unsupported DB Instance Class

I'm trying to upgrade from version 12.5 to the version 13.1 in RDS. But I'm receiving an error similar to the one described in this question: RDS does not support creating a DB instance with the following combination. As far as I understand in order to upgrade a proper version DB instance class should be selected. However the error message shows a previous selection, not a new one. Same message is received in Terraform setting up

engine_version    = "13.1"
instance_class    = "db.t3.small"

Screenshot from AWS showing the changes and message: enter image description here

Copied error message to make it easier to research:

We're sorry, your request to modify DB instance [service-name] has failed. RDS does not support creating a DB instance with the following combination: DBInstanceClass=db.t2.small, Engine=postgres, EngineVersion=13.1, LicenseModel=postgresql-license. For supported combinations of instance class and database engine version, see the documentation.

Is there some key to allow_instance_class_change (a made up key) or something else I overlooked what prevents an upgrade? Thank you!

Upvotes: 4

Views: 5086

Answers (1)

Mark B
Mark B

Reputation: 200617

I would suggest upgrading to T3 first, then upgrading to PostgreSQL 13. If you need to do those at the same time you might have better luck going through the API, but I'm guessing the way the version 13 upgrade works you need to already be on a supported instance type for the upgrade to proceed.

Upvotes: 9

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