tfvars & modules

[Tennis Smith]

Hi,

I'm not able to pass a variable from an included tfvars file to a module.  Here is my setup. 

"terraform/modules/aws/main.tf"

variable "aws_account_id" {}

provider "aws" {
  allowed_account_ids = ["${var.aws_account_id}"]
}

"terraform/main.tf"

module "aws" {
  source = "./modules/aws"
}

"terraform/vars.tfvars" contains

aws_account_id = "969696969696"

But I get the following error:

 terraform plan -var-file=vars.tfvars   

  Error configuring: 1 error(s) occurred:

* module.aws: missing dependency: var.aws_account_id

What am I missing? Do I have to explicitly pass the variable somehow in the "module" definition?

Tks,

-T

[David Adams]

Yep, you've already guessed the answer. Your variable is only scoped to the tf files in the current directory. To pass it to the aws module you can do:

    module "aws" {

      source = "./modules/aws"

      aws_account_id = "${var.aws_account_id}"

    }

It feels a little silly when passing directly through in that way to a local module but modules are designed to be completely isolated units that can be pulled from git, remote files, local files, etc. so this is really the only design that would work without inducing some weird surprises.

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[Tennis Smith]

That worked.

Thanks for the reply, David.

-Tennis