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terraform-nested-module-bug

Overview

There is a bug involving nested modules in Terraform ( https://www.terraform.io/docs/modules/create.html ). I've detailed the error that I'm seeing and the steps to reproduce the error below.

Issue

The corresponding issue is located at hashicorp/terraform#3114

Steps to reproduce

  • Using Terraform v0.6.3
  1. Clone https://github.com/meylor/terraform-nested-module-bug.git
  2. Edit terraform-nested-module-bug/terraform.tfvars to add AWS keys.
  3. Make sure that map.tf isn't using overlapping address space as your current infrastructure
  4. Set your AWS_REGION in an environment variable export AWS_REGION=us-west-1
  5. Run terraform get to get the modules
  6. Run terraform plan to see the resources that will be generated
  7. Run terraform apply to generate the resources. ** This will call a .tf state that will call a parent module, then a child module
  8. The resources will be provisioned correctly
  9. in terraform-nested-module-bug/test.tf comment out the following section:
#module "test" {
#  source = "./modules/parent"
#  vpc_id = "${aws_vpc.instance.id}"
#  env = "${var.env}"
#}
  1. Run terraform plan to see the same error that I'm seeing below.
meylor@meylor:~/terraform-nested-module-bug$ terraform plan
There are warnings and/or errors related to your configuration. Please
fix these before continuing.

Errors:

  * 14 error(s) occurred:

* Provider 'aws' already initialized
* Provisioner 'remote-exec' already initialized
* Provider 'aws' already initialized
* Provisioner 'remote-exec' already initialized
* Provisioner 'remote-exec' already initialized
* Provisioner 'file' already initialized
* Provisioner 'file' already initialized
* Provisioner 'local-exec' already initialized
* Provisioner 'local-exec' already initialized
* Provisioner 'chef' already initialized
* Provisioner 'chef' already initialized
* Provisioner 'chef' already initialized
* Provisioner 'file' already initialized
* Provisioner 'local-exec' already initialized