Add storage_type variable pass-through to RDS cluster module

[Copilot]

Enables storage type configuration for Aurora PostgreSQL clusters by exposing the storage_type parameter from the underlying cloudposse/rds-cluster/aws module.

Changes

• src/variables.tf: Added storage_type variable with validation for valid AWS storage types (standard, gp2, io1, aurora, aurora-iopt1)
• src/cluster-regional.tf: Pass storage_type to the aurora_postgres_cluster module

Usage

components:
  terraform:
    aurora-postgres:
      vars:
        storage_type: aurora-iopt1  # Optional, defaults to null
        # ... other configuration

The variable accepts null (default), allowing AWS to select the appropriate storage type when not explicitly configured.

Warning

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• checkpoint-api.hashicorp.com
  • Triggering command: /usr/local/bin/terraform terraform version (dns block)
  • Triggering command: /usr/local/bin/terraform terraform fmt -check -recursive (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
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Original prompt

Update the Terraform configuration to include the storage_type variable as a pass-through parameter from the root module to the @cloudposse/terraform-aws-rds-cluster submodule. This requires the following changes:

1. Define a new storage_type variable in src/variables.tf, ensuring it matches the structure and description of the variable in the @cloudposse/terraform-aws-rds-cluster repository:

   variable "storage_type" {
     type        = string
     description = "One of 'standard' (magnetic), 'gp2' (general purpose SSD), 'io1' (provisioned IOPS SSD), 'aurora', or 'aurora-iopt1'"
     default     = null
   }

2. Update src/cluster-regional.tf to pass the storage_type variable from the root module to the submodule configuration:

   storage_type = var.storage_type

These adjustments allow users to configure storage types via the root module, propagating the setting to the submodule.

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