Terragrunt with TFE

[yasin-amadmia-mck]

Team,
Trying to get TG work with TFE, especially for dependencies.
I am aware that with TFE, the standard input way of terragrunt does'nt work so have to use generate block to generate auto.tfvars file.

Here is my structure

├── alb
│   ├── _dependencies.hcl
│   └── terragrunt.hcl
└── vpc
    └── terragrunt.hcl

Module alb depends on vpc for its vpc.id

The alb/_dependencies.hcl is

dependencies {
  paths = ["../vpc"]
}


dependency "vpc" {
  config_path = "../vpc"
  mock_outputs = {
    vpc_id  = "mock-vpc-id"
  }
}


inputs = {
  _vpc_id         = dependency.vpc.outputs.vpc_id
}

Then to use these var, i have alb/terragrunt.hcl

locals {
  dependencies = read_terragrunt_config("./_dependencies.hcl")
  alb = {
    vpc_id  = local.dependencies.inputs._vpc_id
  }

  tags = {

  }
}

generate "tfvars-vpc" {
  path      = "vpc.auto.tfvars"
  if_exists = "overwrite"
  disable_signature = true
  contents = <<EOF
alb = ${jsonencode(local.alb)}
EOF
}

in the TF code I reference alb.vpc_id, when i want to use vpc_id.

When i run terragrunt run-all apply from the root of the folder , it applies vpc and then alb but the vpc_id value is always coming as mock_vpc_id and not the actual vpc_id output.

If i first run terragrunt apply from VPC, and then run terragrunt apply from alb separaterly, it works.

The backend configuration is as below:
For VPC and ALB, it will be different workspaces.

terraform {
    backend "remote" {
        hostname = "${local.tfc_hostname}"
        organization = "${local.tfc_organization}"
        workspaces {
            name = "WS-${local.env}-${local.project}-${local.module}"
        }
    }
}
EOF
}

---

Tracked in ticket #111124