feat: Add create_autoscaling_group option and extra outputs (terraform-aws-modules#2067)

Author: sethpollack

modules/self-managed-node-group/README.md

@@ -91,6 +91,7 @@ module "self_managed_node_group" {
 | <a name="input_cluster_version"></a> [cluster\_version](#input\_cluster\_version) | Kubernetes cluster version - used to lookup default AMI ID if one is not provided | `string` | `null` | no |
 | <a name="input_cpu_options"></a> [cpu\_options](#input\_cpu\_options) | The CPU options for the instance | `map(string)` | `null` | no |
 | <a name="input_create"></a> [create](#input\_create) | Determines whether to create self managed node group or not | `bool` | `true` | no |
+| <a name="input_create_autoscaling_group"></a> [create\_autoscaling\_group](#input\_create\_autoscaling\_group) | Determines whether to create autoscaling group or not | `bool` | `true` | no |
 | <a name="input_create_iam_instance_profile"></a> [create\_iam\_instance\_profile](#input\_create\_iam\_instance\_profile) | Determines whether an IAM instance profile is created or to use an existing IAM instance profile | `bool` | `true` | no |
 | <a name="input_create_launch_template"></a> [create\_launch\_template](#input\_create\_launch\_template) | Determines whether to create launch template or not | `bool` | `true` | no |
 | <a name="input_create_schedule"></a> [create\_schedule](#input\_create\_schedule) | Determines whether to create autoscaling group schedule or not | `bool` | `true` | no |
@@ -194,10 +195,12 @@ module "self_managed_node_group" {
 | <a name="output_iam_role_arn"></a> [iam\_role\_arn](#output\_iam\_role\_arn) | The Amazon Resource Name (ARN) specifying the IAM role |
 | <a name="output_iam_role_name"></a> [iam\_role\_name](#output\_iam\_role\_name) | The name of the IAM role |
 | <a name="output_iam_role_unique_id"></a> [iam\_role\_unique\_id](#output\_iam\_role\_unique\_id) | Stable and unique string identifying the IAM role |
+| <a name="output_image_id"></a> [image\_id](#output\_image\_id) | ID of the image |
 | <a name="output_launch_template_arn"></a> [launch\_template\_arn](#output\_launch\_template\_arn) | The ARN of the launch template |
 | <a name="output_launch_template_id"></a> [launch\_template\_id](#output\_launch\_template\_id) | The ID of the launch template |
 | <a name="output_launch_template_latest_version"></a> [launch\_template\_latest\_version](#output\_launch\_template\_latest\_version) | The latest version of the launch template |
 | <a name="output_platform"></a> [platform](#output\_platform) | Identifies if the OS platform is `bottlerocket`, `linux`, or `windows` based |
 | <a name="output_security_group_arn"></a> [security\_group\_arn](#output\_security\_group\_arn) | Amazon Resource Name (ARN) of the security group |
 | <a name="output_security_group_id"></a> [security\_group\_id](#output\_security\_group\_id) | ID of the security group |
+| <a name="output_user_data"></a> [user\_data](#output\_user\_data) | Base64 encoded user data |
 <!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->

modules/self-managed-node-group/main.tf

@@ -263,7 +263,7 @@ locals {
 }
 
 resource "aws_autoscaling_group" "this" {
-  count = var.create ? 1 : 0
+  count = var.create && var.create_autoscaling_group ? 1 : 0
 
   name        = var.use_name_prefix ? null : var.name
   name_prefix = var.use_name_prefix ? "${var.name}-" : null

modules/self-managed-node-group/outputs.tf

@@ -145,3 +145,13 @@ output "platform" {
   description = "Identifies if the OS platform is `bottlerocket`, `linux`, or `windows` based"
   value       = var.platform
 }
+
+output "image_id" {
+  description = "ID of the image"
+  value       = try(data.aws_ami.eks_default[0].image_id, "")
+}
+
+output "user_data" {
+  description = "Base64 encoded user data"
+  value       = try(module.user_data.user_data, "")
+}

modules/self-managed-node-group/variables.tf

@@ -266,6 +266,12 @@ variable "launch_template_tags" {
 # Autoscaling group
 ################################################################################
 
+variable "create_autoscaling_group" {
+  description = "Determines whether to create autoscaling group or not"
+  type        = bool
+  default     = true
+}
+
 variable "name" {
   description = "Name of the Self managed Node Group"
   type        = string

node_groups.tf

@@ -346,6 +346,8 @@ module "self_managed_node_group" {
   cluster_ip_family = var.cluster_ip_family
 
   # Autoscaling Group
+  create_autoscaling_group = try(each.value.create_autoscaling_group, var.self_managed_node_group_defaults.create_autoscaling_group, true)
+
   name            = try(each.value.name, each.key)
   use_name_prefix = try(each.value.use_name_prefix, var.self_managed_node_group_defaults.use_name_prefix, true)