feat: add option to set placement group in launch template

Author: edersonbrilhante

main.tf

@@ -209,6 +209,7 @@ module "runners" {
   metadata_options                     = var.runner_metadata_options
   credit_specification                 = var.runner_credit_specification
   cpu_options                          = var.runner_cpu_options
+  placement                            = var.runner_placement
 
   enable_runner_binaries_syncer    = var.enable_runner_binaries_syncer
   lambda_s3_bucket                 = var.lambda_s3_bucket

modules/multi-runner/runners.tf

@@ -57,6 +57,7 @@ module "runners" {
   metadata_options                     = each.value.runner_config.runner_metadata_options
   credit_specification                 = each.value.runner_config.credit_specification
   cpu_options                          = each.value.runner_config.cpu_options
+  placement                            = each.value.runner_config.placement
 
   enable_runner_binaries_syncer    = each.value.runner_config.enable_runner_binaries_syncer
   lambda_s3_bucket                 = var.lambda_s3_bucket

modules/multi-runner/variables.tf

@@ -130,6 +130,17 @@ variable "multi_runner_config" {
         core_count       = number
         threads_per_core = number
       }), null)
+      placement = optional(object({
+        affinity                = optional(string)
+        availability_zone       = optional(string)
+        group_id                = optional(string)
+        group_name              = optional(string)
+        host_id                 = optional(string)
+        host_resource_group_arn = optional(number)
+        spread_domain           = optional(string)
+        tenancy                 = optional(string)
+        partition_number        = optional(number)
+      }), null)
       runner_log_files = optional(list(object({
         log_group_name   = string
         prefix_log_group = bool

modules/runners/main.tf

@@ -169,6 +169,21 @@ resource "aws_launch_template" "runner" {
     }
   }
 
+  dynamic "placement" {
+    for_each = var.placement != null ? [var.placement] : []
+    content {
+      affinity                = try(placement.value.affinity, null)
+      availability_zone       = try(placement.value.availability_zone, null)
+      group_id                = try(placement.value.group_id, null)
+      group_name              = try(placement.value.group_name, null)
+      host_id                 = try(placement.value.host_id, null)
+      host_resource_group_arn = try(placement.value.host_resource_group_arn, null)
+      spread_domain           = try(placement.value.spread_domain, null)
+      tenancy                 = try(placement.value.tenancy, null)
+      partition_number        = try(placement.value.partition_number, null)
+    }
+  }
+
   monitoring {
     enabled = var.enable_runner_detailed_monitoring
   }

modules/runners/variables.tf

@@ -671,6 +671,22 @@ variable "cpu_options" {
   default = null
 }
 
+variable "placement" {
+  description = "The placement options for the instance. See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/launch_template#placement for details."
+  type = object({
+    affinity                = optional(string)
+    availability_zone       = optional(string)
+    group_id                = optional(string)
+    group_name              = optional(string)
+    host_id                 = optional(string)
+    host_resource_group_arn = optional(number)
+    spread_domain           = optional(string)
+    tenancy                 = optional(string)
+    partition_number        = optional(number)
+  })
+  default = null
+}
+
 variable "enable_jit_config" {
   description = "Overwrite the default behavior for JIT configuration. By default JIT configuration is enabled for ephemeral runners and disabled for non-ephemeral runners. In case of GHES check first if the JIT config API is available. In case you are upgrading from 3.x to 4.x you can set `enable_jit_config` to `false` to avoid a breaking change when having your own AMI."
   type        = bool

variables.tf

@@ -888,6 +888,22 @@ variable "runner_cpu_options" {
   default = null
 }
 
+variable "runner_placement" {
+  description = "The placement options for the instance. See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/launch_template#placement for details."
+  type = object({
+    affinity                = optional(string)
+    availability_zone       = optional(string)
+    group_id                = optional(string)
+    group_name              = optional(string)
+    host_id                 = optional(string)
+    host_resource_group_arn = optional(number)
+    spread_domain           = optional(string)
+    tenancy                 = optional(string)
+    partition_number        = optional(number)
+  })
+  default = null
+}
+
 variable "enable_jit_config" {
   description = "Overwrite the default behavior for JIT configuration. By default JIT configuration is enabled for ephemeral runners and disabled for non-ephemeral runners. In case of GHES check first if the JIT config API is available. In case you are upgrading from 3.x to 4.x you can set `enable_jit_config` to `false` to avoid a breaking change when having your own AMI."
   type        = bool