Request: aws_regions (plural) data source which can be filtered by product.

[apowers]

Feature Request:
aws_regions (plural) data source which can be filtered by product.

Example of desired feature to return a list of regions that support EC2.

data "aws_regions" "ec2" {}

[bflad]

Sounds like an interesting use case! Are you able to explain how you were planning on using this within Terraform?

This seems like it might be possible using the endpoints data vendored with the AWS SDK (caveat: only up to date with the SDK version baked into the provider at time of release), although it would probably require an implementation like the below to keep it generic for supporting other services:

# Not implemented - may have different interface in the future
data "aws_regions" "ec2" {
  service_name = "ec2"
}

output "ec2_regions" {
  value = "${join(",", data.aws_regions.ec2.regions)}"
}

[apowers]

Thank you for your quick reply.

The security team wants to deploy their auditing application and ensure that it is running in every region. When new regions are available, they want it to be deployed in those new regions automatically.

[bflad]

There is a caveat though, I do not believe its possible to automatically configure providers in this fashion as provider does not support count as if Terraform 0.11.3. See also: hashicorp/terraform#16967

[ghost]

Other use case is having IAM policies update automatically. We use a naming convention for SSM logging buckets. To give the EC2 admins permissions I need to generate a list of buckets and I can't use remote state easily either.

[bflad]

Hi folks 👋 A new aws_regions data source was previously released in version 2.58.0 of the Terraform AWS Provider. It uses the EC2 DescribeRegions API to return a set of available regions, potentially filtered by their opt-in state. To further track Terraform support for declaring multiple providers with count/for_each-like syntax, please follow hashicorp/terraform#16967.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!