[SOLVED] conditional module creation terraform

conditional module creation terraform

I have the following main.tf

module "vpc" {

 source = "registry.terraform.io/terraform-aws-modules/vpc/aws"
  version = "~> 3.14.0"
  name = var.environment
  cidr = var.vpc_cidr
  azs             = var.az
  private_subnets = var.private_subnets
  private_subnet_tags = var.private_subnet_tags
  public_subnets  = var.public_subnets

  enable_dns_hostnames = true
  enable_dns_support = true
  enable_nat_gateway = true
  single_nat_gateway = true
  one_nat_gateway_per_az = false
}

Is there any way to conditionally add this module? Just like when using resource which can achieved by:

count = var.enabled ? 1 : 0

I am asking this because I do not have access to the underling module files, I can only run the module as shown above.

Solution

Beginning in version 0.13 of core Terraform, you can use the for_each meta-argument in the module block for conditional management in the same manner as resource or data:

module "vpc" {
  source = "registry.terraform.io/terraform-aws-modules/vpc/aws"
  version = "~> 3.14.0"

  for_each = var.enabled ? toset(["this"]) : []

  name = var.environment
  cidr = var.vpc_cidr
  azs             = var.az
  private_subnets = var.private_subnets
  private_subnet_tags = var.private_subnet_tags
  public_subnets  = var.public_subnets
  enable_dns_hostnames = true
  enable_dns_support = true
  enable_nat_gateway = true
  single_nat_gateway = true
  one_nat_gateway_per_az = false
}