Error: Invalid AWS Region: ap-southeast-4

Terraform Providers AWS
1

When trying to run terraform init for an AWS configuration where the backend is in the new region ap-southeast-4 (Australia/Melbourne), backend initialisation fails with the error

Error: Invalid AWS Region: ap-southeast-4.

Support for this region was added in provider version 4.54.0, which I have upgraded to.

The backend configuration looks like this (values redacted):

terraform {
  required_version = ">= 1.2.1"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "4.54.0"
    }
  }

  backend "s3" {
    key            = "<object_key>"
    bucket         = "<bucket_name>"
    dynamodb_table = "<dynamodb_name>"
    region         = "ap-southeast-4"
    acl            = "private"
    encrypt        = "true"
    role_arn       = "<role_arn>"
  }
}

If I change region to anything else, this error does not occur.

Just posting here to determine if it’s a bug that I should post on GitHub, or if I am doing something else wrong.

Thank you in advance.

2

What version of Terraform are you using? As you are using an S3 backend you also need region support in Terraform core as well as the AWS provider.

3

Thank you, I wasn’t aware of that. I will update my Terraform binary and proceed.

4

Still happening with Terraform 1.3.8.

5

Using skip_region_validation = true in the backend config provides a workaround.