AWS Backup for RDS

Question

We have setup a AWS backup plan to backup RDS. The RDS that requiring backup are tagged with same tagging. However, we found 2 of RDS are not able to do the backup but other RDS are fine. How could I troubleshoot why these 2 RDS are not cover by the backup plan?

Accepted Answer

RDS instances might have maintenance windows or other backup operations (like automated snapshots) that could interfere with AWS Backup if they are scheduled around the same time.

Answer

Hi,

Do you have resource type parametrized in your config in addition to tag? In that case, resource type takes over:

see https://docs.aws.amazon.com/aws-backup/latest/devguide/assigning-resources.html

```
If both a resource type and tags are specified in a resource assignment, the resource type 
specified in the backup plan takes priority over the tag condition. Service opt-in settings
 are disregarded in this situation.
```

Best,

Didier

Answer

Thanks all. With some testing, the problem is likely too close to the automated backup window configured in RDS instance.

Answer

As a last resort, if Didier's suggestion does not pan out, I'd go back to Riku's suggestion about tag values. I have experienced situations where the tag values look EXACTLY the same, but one somehow has a space or some other thing in it that the display doesn't show. You can always manually re-type the tag value for the RDS that did not backup just to eliminate this possibility.
Best.

Answer

Hello.

Do the tag values ​​and keys set on the RDS instance match the resource selection settings set in AWS Backup?  
Tag values ​​are case sensitive and must match exactly.

AWS Backup for RDS

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