How do we call submodules from the same terragrunt.hcl file?

[manzajohn]

0

I was trying to migrate eks module from version 19 to 20, seems like there is a new submodule got introduced aws_auth in terraform aws eks module and need to remove aws_auth details from eks module. My current terragrunt.hcl file looks like this

terraform {
source = "tfr:///terraform-aws-modules/eks/aws//.?version=${local.source_version}"
}
inputs = {''''}

How can i call this new submodule from the same terragrunt file?

https://registry.terraform.io/modules/terraform-aws-modules/eks/aws/latest/submodules/aws-auth
from the same terragrunt.hcl file? or what is the best way to achieve this?

i tried to create a separate folder and own terragrunt.hcl file like below

terraform {
source = "tfr:///terraform-aws-modules/eks/aws//modules/aws-auth//.?version=${local.source_version}"
}
inputs = {

version = "~> 20.0"
aws_eks_cluster                              = try(local.eks_outputs.cluster_name.value, "")
manage_aws_auth_configmap = true

aws_auth_roles = local.maproles

}

Also i have added dependency as eks module in this file but still
This gave me below error while terragrunt plan

Error: Reference to undeclared resource │ │ on k8s-provider.tf line 4, in provider "kubernetes": │ 4: host = try(aws_eks_cluster.this[0].endpoint, null) │ │ A managed resource "aws_eks_cluster" "this" has not been declared in the │ root module.

What is the best solution for this?

[yhakbar]

Hey @manzajohn ,

Try this:

terraform {
  source = "tfr:///terraform-aws-modules/eks/aws//modules/aws-auth?version=${local.source_version}"
}

I'm not sure that version input is doing anything, FYI.

[manzajohn]

That is what i tried in the separate terragrunt.hcl file, which throws the above error, my eks_cluster hcl file is having below

terraform {
source = "tfr:///terraform-aws-modules/eks/aws//.?version=${local.source_version}"
}

[yhakbar]

Notice that the file above has this:

tfr:///terraform-aws-modules/eks/aws//modules/aws-auth//.?version=${local.source_version}

Not this:

tfr:///terraform-aws-modules/eks/aws//modules/aws-auth?version=${local.source_version}

[manzajohn]

yes, tried the same, still same error
14:09:25.672 STDERR [aws_auth] terraform: │ Error: Reference to undeclared resource 14:09:25.672 STDERR [aws_auth] terraform: │ 14:09:25.672 STDERR [aws_auth] terraform: │ on k8s-provider.tf line 4, in provider "kubernetes": 14:09:25.672 STDERR [aws_auth] terraform: │ 4: host = try(aws_eks_cluster.this[0].endpoint, null) 14:09:25.672 STDERR [aws_auth] terraform: │ 14:09:25.672 STDERR [aws_auth] terraform: │ A managed resource "aws_eks_cluster" "this" has not been declared in the 14:09:25.672 STDERR [aws_auth] terraform: │ root module.

I can see the errored file in cache folder

`# Generated by Terragrunt. Sig: nIlQXj57tbuaRZEa

provider "kubernetes" {
  host                   = try(aws_eks_cluster.this[0].endpoint, null)
  cluster_ca_certificate = base64decode(try(aws_eks_cluster.this[0].certificate_authority[0].data, "="))
  exec {
    api_version = "client.authentication.k8s.io/v1beta1"
    command     = "aws"
    # This requires the awscli to be installed locally where Terraform is executed
    args = ["eks", "get-token", "--cluster-name", try(aws_eks_cluster.this[0].name, ""), "--region", "us-west-2", "--role", ""]
  }
}
`

But as per the module example no such parameters are passed
https://registry.terraform.io/modules/terraform-aws-modules/eks/aws/latest/submodules/aws-auth