Serverless-framework postgresql version upgrading problem

Question

We use serverless-framework and Postgresql.

Type: AWS::RDS::DBInstance
Properties:
  EngineVersion: 11.8

It was 11.8 before, we successfully upgraded it from 11.8 to 11.9 by changing the version in serverless.yml in EngineVersion. But now we need to upgrade it to 11.10 and we have the following issue:

The error message:

Cannot upgrade postgres from 11.9 to 11.1 (Service: AmazonRDS; Status Code: 400; Error Code: InvalidParameterCombination; Request ID: e0d1923a-cf98-44ea-a9e4-bc3871e33bf6; Proxy: null).

So it looks like it tries to upgrade to 11.1 rather than 11.10.

Danil Kochetov · Accepted Answer · 2021-02-18 12:02:30Z

3

The 11.10 value you're specifying for the EngineVersion property is processed as a number by the YAML engine since you're not using quotes, so the trailing zeros are removed and the resulting value is 11.1. You need to specify the value in quotes, like this: "11.10"

answered Feb 18, 2021 at 12:02

Danil Kochetov

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Nikita Harzha · Accepted Answer · 2021-02-18 11:58:23Z

3

It seems like Serverless ignores '0' in Engine Version that you are trying to set up. Could you try to escape version with quotes?

It will look like this:

Type: AWS::RDS::DBInstance
Properties:
  EngineVersion: '11.10'

It should help to solve the problem and upgrade version successfully

edited Feb 18, 2021 at 11:58

answered Feb 18, 2021 at 11:53

Nikita Harzha

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