AWS: Can I disable/enable RDS multi-AZ daily?

Question

I have a mysql RDS instance that is used only from 9am to 9pm.

To avoid too much charges, I would like to stop it during the night, but I cannot do this because I have Multi-AZ active (I need it during server use).

Does it make sense to schedule this process?

@8:45pm:

• disable multi-AZ
• stop RDS instance

@8:45am:

• start RDS instance
• enable multi-AZ

Answer 1

Sounds like a good cost-cutting move.

You can create a lambda function (or two) that uses an AWS library (like boto3) to perform this disabling/enabling of multi-AZ and of your RDS instance.

Then, use CloudWatch Events to trigger the lambda function at the times you specify.