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feat(modules): autoscaling group
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‎modules/asg/.header.md‎

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# asg

‎modules/asg/README.md‎

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<!-- BEGIN_TF_DOCS -->
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# asg
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## Requirements
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| Name | Version |
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|------|---------|
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| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.6.0 |
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## Providers
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| Name | Version |
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|------|---------|
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| <a name="provider_aws"></a> [aws](#provider\_aws) | 5.58.0 |
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## Modules
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No modules.
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## Resources
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| Name | Type |
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|------|------|
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| [aws_autoscaling_group.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/autoscaling_group) | resource |
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| [aws_iam_instance_profile.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_instance_profile) | resource |
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| [aws_iam_role.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role) | resource |
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| [aws_iam_role_policy_attachment.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
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| [aws_launch_template.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/launch_template) | resource |
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| [aws_iam_policy_document.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
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## Inputs
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| Name | Description | Type | Default | Required |
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|------|-------------|------|---------|:--------:|
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| <a name="input_cluster_name"></a> [cluster\_name](#input\_cluster\_name) | Name of the ECS Cluster to associate with the Autoscaling Group | `string` | n/a | yes |
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| <a name="input_create_launch_template"></a> [create\_launch\_template](#input\_create\_launch\_template) | Either to create a Launch Template to associate with the Autoscaling group | `bool` | `true` | no |
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| <a name="input_desired_capacity"></a> [desired\_capacity](#input\_desired\_capacity) | Desired capacity for the Autoscaling group | `number` | n/a | yes |
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| <a name="input_iam_instance_profile_name"></a> [iam\_instance\_profile\_name](#input\_iam\_instance\_profile\_name) | Name of the IAM Instance Profile | `string` | `null` | no |
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| <a name="input_iam_instance_profile_tags"></a> [iam\_instance\_profile\_tags](#input\_iam\_instance\_profile\_tags) | Resource Tags for the IAM Instance Profile | `map(any)` | `{}` | no |
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| <a name="input_iam_role_name"></a> [iam\_role\_name](#input\_iam\_role\_name) | Name for the IAM Role | `string` | `null` | no |
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| <a name="input_iam_role_policy_attachments"></a> [iam\_role\_policy\_attachments](#input\_iam\_role\_policy\_attachments) | Policy ARNs to attach to the IAM Role | `list(string)` | <pre>[<br> "arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceforEC2Role"<br>]</pre> | no |
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| <a name="input_iam_role_tags"></a> [iam\_role\_tags](#input\_iam\_role\_tags) | Resource Tags for IAM Role | `map(any)` | `{}` | no |
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| <a name="input_instances_tags"></a> [instances\_tags](#input\_instances\_tags) | Resources Tags to propagate to the Instances | `map(any)` | `{}` | no |
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| <a name="input_launch_template"></a> [launch\_template](#input\_launch\_template) | Launch Template to use with the Autoscaling group | <pre>object({<br> name = optional(string, null)<br> image_id = optional(string, null)<br> instance_type = optional(string, null)<br> vpc_security_group_ids = optional(list(string), [])<br> key_name = optional(string, null)<br> user_data = optional(string, null)<br> tags = optional(map(any), {})<br> })</pre> | `{}` | no |
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| <a name="input_launch_template_id"></a> [launch\_template\_id](#input\_launch\_template\_id) | Identifier of the Launch Template | `string` | `null` | no |
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| <a name="input_max_size"></a> [max\_size](#input\_max\_size) | Max. size for the Autoscaling group | `number` | n/a | yes |
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| <a name="input_min_size"></a> [min\_size](#input\_min\_size) | Min. size for the Autoscaling group | `number` | n/a | yes |
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| <a name="input_name"></a> [name](#input\_name) | Name of the Autoscaling Group | `string` | n/a | yes |
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| <a name="input_tags"></a> [tags](#input\_tags) | Resources Tags for Autoscaling group | `map(any)` | `{}` | no |
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| <a name="input_vpc_zone_identifier"></a> [vpc\_zone\_identifier](#input\_vpc\_zone\_identifier) | Identifiers of the VPC Subnets | `list(string)` | n/a | yes |
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## Outputs
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| Name | Description |
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|------|-------------|
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| <a name="output_arn"></a> [arn](#output\_arn) | ARN of the Autoscaling group |
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| <a name="output_iam_instance_profile_arn"></a> [iam\_instance\_profile\_arn](#output\_iam\_instance\_profile\_arn) | ARN of the IAM Instance Profile |
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| <a name="output_iam_instance_profile_id"></a> [iam\_instance\_profile\_id](#output\_iam\_instance\_profile\_id) | Identifier of the IAM Instance Profile |
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| <a name="output_iam_role_id"></a> [iam\_role\_id](#output\_iam\_role\_id) | Identifier of the IAM Role |
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| <a name="output_id"></a> [id](#output\_id) | Identifier of the Autoscaling group |
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| <a name="output_launch_template_arn"></a> [launch\_template\_arn](#output\_launch\_template\_arn) | ARN of the Launch Template |
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| <a name="output_launch_template_id"></a> [launch\_template\_id](#output\_launch\_template\_id) | Identifier of the Launch Template |
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<!-- END_TF_DOCS -->

‎modules/asg/main.tf‎

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resource "aws_autoscaling_group" "this" {
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name = var.name
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vpc_zone_identifier = var.vpc_zone_identifier
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desired_capacity = var.desired_capacity
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min_size = var.min_size
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max_size = var.max_size
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protect_from_scale_in = false
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health_check_type = "EC2"
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launch_template {
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id = var.create_launch_template ? aws_launch_template.this[0].id : var.launch_template_id
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}
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dynamic "tag" {
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for_each = var.instances_tags
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iterator = tag
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content {
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key = tag.key
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value = tag.value
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propagate_at_launch = true
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}
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}
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dynamic "tag" {
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for_each = var.tags
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iterator = tag
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content {
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key = tag.key
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value = tag.value
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propagate_at_launch = false
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}
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}
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}
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################################################################################
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# Launch Template
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################################################################################
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resource "aws_launch_template" "this" {
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count = var.create_launch_template ? 1 : 0
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name = var.launch_template.name
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image_id = var.launch_template.image_id
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instance_type = var.launch_template.instance_type
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vpc_security_group_ids = var.launch_template.vpc_security_group_ids
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key_name = var.launch_template.key_name
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iam_instance_profile {
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name = aws_iam_instance_profile.this.name
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}
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user_data = base64encode(
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try(
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var.launch_template.user_data,
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<<-USERDATA
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#!/bin/bash
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echo ECS_CLUSTER="${var.cluster_name}" >> /etc/ecs/ecs.config
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USERDATA
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)
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)
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tags = var.launch_template.tags
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}
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################################################################################
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# IAM Instance Profile
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################################################################################
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data "aws_iam_policy_document" "this" {
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statement {
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actions = ["sts:AssumeRole"]
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principals {
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type = "Service"
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identifiers = ["ec2.amazonaws.com"]
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}
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}
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}
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resource "aws_iam_role" "this" {
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name = var.iam_role_name
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assume_role_policy = data.aws_iam_policy_document.this.json
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tags = var.iam_role_tags
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}
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resource "aws_iam_role_policy_attachment" "this" {
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count = length(var.iam_role_policy_attachments)
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role = aws_iam_role.this.name
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policy_arn = element(var.iam_role_policy_attachments, count.index)
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}
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resource "aws_iam_instance_profile" "this" {
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name = var.iam_instance_profile_name
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role = aws_iam_role.this.name
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tags = var.iam_instance_profile_tags
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}

‎modules/asg/outputs.tf‎

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output "id" {
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description = "Identifier of the Autoscaling group"
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value = aws_autoscaling_group.this.id
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}
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output "arn" {
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description = "ARN of the Autoscaling group"
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value = aws_autoscaling_group.this.arn
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}
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################################################################################
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# Launch Template
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################################################################################
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output "launch_template_id" {
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description = "Identifier of the Launch Template"
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value = var.create_launch_template ? aws_launch_template.this[0].id : var.launch_template_id
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}
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output "launch_template_arn" {
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description = "ARN of the Launch Template"
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value = var.create_launch_template ? aws_launch_template.this[0].arn : null
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}
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################################################################################
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# IAM Instance Profile
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################################################################################
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output "iam_role_id" {
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description = "Identifier of the IAM Role"
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value = aws_iam_role.this.id
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}
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output "iam_instance_profile_id" {
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description = "Identifier of the IAM Instance Profile"
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value = aws_iam_instance_profile.this.id
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}
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output "iam_instance_profile_arn" {
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description = "ARN of the IAM Instance Profile"
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value = aws_iam_instance_profile.this.arn
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}

‎modules/asg/variables.tf‎

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variable "cluster_name" {
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description = "Name of the ECS Cluster to associate with the Autoscaling Group"
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type = string
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}
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variable "name" {
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description = "Name of the Autoscaling Group"
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type = string
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}
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variable "vpc_zone_identifier" {
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description = "Identifiers of the VPC Subnets"
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type = list(string)
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}
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variable "desired_capacity" {
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description = "Desired capacity for the Autoscaling group"
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type = number
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}
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variable "min_size" {
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description = "Min. size for the Autoscaling group"
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type = number
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}
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variable "max_size" {
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description = "Max. size for the Autoscaling group"
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type = number
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}
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variable "instances_tags" {
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description = "Resources Tags to propagate to the Instances"
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type = map(any)
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default = {}
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}
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variable "tags" {
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description = "Resources Tags for Autoscaling group"
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type = map(any)
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default = {}
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}
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################################################################################
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# Launch Template
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################################################################################
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variable "launch_template" {
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description = "Launch Template to use with the Autoscaling group"
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type = object({
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name = optional(string, null)
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image_id = optional(string, null)
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instance_type = optional(string, null)
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vpc_security_group_ids = optional(list(string), [])
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key_name = optional(string, null)
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user_data = optional(string, null)
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tags = optional(map(any), {})
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})
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default = {}
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}
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variable "create_launch_template" {
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description = "Either to create a Launch Template to associate with the Autoscaling group"
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type = bool
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default = true
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}
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variable "launch_template_id" {
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description = "Identifier of the Launch Template"
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type = string
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default = null
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}
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################################################################################
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# IAM Role
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################################################################################
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variable "iam_role_name" {
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description = "Name for the IAM Role"
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type = string
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default = null
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}
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variable "iam_role_policy_attachments" {
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description = "Policy ARNs to attach to the IAM Role"
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type = list(string)
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default = [
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"arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceforEC2Role"
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]
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}
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variable "iam_role_tags" {
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description = "Resource Tags for IAM Role"
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type = map(any)
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default = {}
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}
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################################################################################
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# IAM Instance Profile
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################################################################################
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variable "iam_instance_profile_name" {
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description = "Name of the IAM Instance Profile"
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type = string
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default = null
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}
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variable "iam_instance_profile_tags" {
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description = "Resource Tags for the IAM Instance Profile"
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type = map(any)
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default = {}
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}

‎modules/asg/version.tf‎

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terraform {
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required_version = ">= 1.6.0"
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}

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