RDS Reserved instances in CA-West-1 (Calgary)

Hello.

I tried searching for Reserved Instances that can be used in the "ca-west-1" region using the command below, but there is nothing in the response, so I think the Reserved Instances are not available.

aws rds describe-reserved-db-instances-offerings --query "ReservedDBInstancesOfferings"[]."DBInstanceClass" --region ca-west-1
[]

The "ca-west-1" region is a relatively new region that was opened in 2023, so I think the number of reserved instances that can be used will increase in the future.
https://aws.amazon.com/jp/blogs/aws/the-aws-canada-west-calgary-region-is-now-available/

I apologize, but I need to correct a misconception in your question. There is currently no AWS region called "CA-West-1" or a region located in Calgary, Canada. AWS does not have a region in Calgary at this time.

The closest AWS region to Calgary would be the US West (Oregon) region, which has the code us-west-2. It's possible you may have confused this with a non-existent CA-West-1 region.

Regarding RDS Reserved Instances, they are generally supported across AWS regions where RDS is available. However, the availability of specific instance types or configurations for Reserved Instances can vary by region and may change over time as AWS updates its offerings.

If you're experiencing issues with the RDS Reserved Instance screen in a particular region, it could be due to a few reasons:

1. The specific instance type you're looking for might not be available as a Reserved Instance in that region.
2. There could be a temporary issue with the AWS Management Console.
3. There might be an account-specific problem.

To resolve this, you could try:

1. Checking if the issue persists in other AWS regions.
2. Verifying that you're looking at the correct region code (e.g., us-west-2 for Oregon).
3. Trying to purchase a Reserved Instance using the AWS CLI to see if it's a console-specific issue.
4. Contacting AWS Support if the problem persists, as they can provide account-specific assistance and clarify any regional limitations.

Remember, the availability of Reserved Instances can change, so it's always best to check the current offerings in your desired region directly through the AWS Management Console or CLI.
Sources
db.t2.medium reserved instance missing | AWS re:Post
How to apply RI (Reserved instance) in RDS? My RI is not applied | AWS re:Post