removing worker subnets piece

Signed-off-by: greg pereira <[email protected]>

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       matrix:
         terraform: [ 1.6.1 ]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     container:
       image: hashicorp/terraform:${{ matrix.terraform }}
     steps:

.github/workflows/pre_commit.yml

@@ -8,7 +8,7 @@ on: # yamllint disable-line rule:truthy
 
 jobs:
   pre_commit:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     steps:
       - name: Set up Python
         uses: actions/[email protected]

main.tf

@@ -62,8 +62,8 @@ module "runner-instance" {
   environment       = var.environment
   iam_object_prefix = random_id.unique_prefix.hex
 
+  subnet_id = var.subnet_id == null ? element(module.vpc.private_subnets, 0) : var.subnet_id
   vpc_id    = var.vpc_id == null ? module.vpc.vpc_id : var.vpc_id
-  subnet_id = element(module.vpc.private_subnets, 0)
 
   runner_ami_filter                       = var.runner_ami_filter
   runner_worker_docker_machine_ami_filter = var.runner_worker_docker_machine_ami_filter
@@ -147,9 +147,8 @@ module "runner-instance" {
   }
 
   runner_worker_docker_machine_instance = {
-    types      = var.runner_worker_docker_machine_instance_types
-    root_size  = var.runner_worker_docker_machine_instance_root_size
-    subnet_ids = var.runner_worker_docker_machine_instance_subnet_ids
+    types     = var.runner_worker_docker_machine_instance_types
+    root_size = var.runner_worker_docker_machine_instance_root_size
   }
 
   runner_networking = {

variables.tf

@@ -1,11 +1,13 @@
 variable "vpc_id" {
   description = "The VPC used for the runner and runner workers."
   type        = string
+  default     = null
 }
 
-variable "runner_worker_docker_machine_instance_subnet_ids" {
-  description = "The Subnets used for the runner workers."
-  type        = list(string)
+variable "subnet_id" {
+  description = "The subnet used for the runner and runner workers."
+  type        = string
+  default     = null
 }
 
 variable "aws_region" {