terraform-aws-rds

terraform-aws-rds copied to clipboard

Description

Once we try to upgrade AWS RDS Terraform module version from 3.5 to any 4+ version (5.3.0 included) we see in the following in terraform plan:

 # module.db.module.db_subnet_group.aws_db_subnet_group.this[0] will be destroyed
 # (because index [0] is out of range for count)
 - resource "aws_db_subnet_group" "this" {
 <output omitted>
 }

I suppose the problem is with modules/db/modules/db_subnet_group/main.tf

count = var.create ? 1 : 0

Workaround

set create_db_subnet_group option to true, which is not clear, as it is already exists and this option is not mandatory required, according to the documentation

Versions

• Module version [Required]: AWS RDS Terraform module 5.3.0

• Terraform version: Terraform v1.1.5

• Provider version(s): AWS 4.30.0