Allow configuring the metadata options in launch configuration

modules/nomad-cluster/main.tf

@@ -93,6 +93,12 @@ resource "aws_launch_configuration" "launch_configuration" {
     delete_on_termination = var.root_volume_delete_on_termination
   }
 
+  metadata_options {
+    http_endpoint = var.launch_configuration_metadata_endpoint ? "enabled": "disabled"
+    http_put_response_hop_limit = var.launch_configuration_metadata_response_hop_limit
+    http_tokens = var.launch_configuration_metadata_http_tokens
+  }
+
   dynamic "ebs_block_device" {
     for_each = var.ebs_block_devices
 

modules/nomad-cluster/variables.tf

@@ -239,3 +239,21 @@ variable "iam_permissions_boundary" {
   type        = string
   default     = null
 }
+
+variable "launch_configuration_metadata_http_tokens" {
+  default = "optional"
+  validation {
+    condition = var.launch_configuration_metadata_http_tokens == "optional" || var.launch_configuration_metadata_http_tokens == "required"
+    error_message = "The supported values for launch_configuration_metadata_http_tokens are either optional or required."
+  }
+}
+
+variable "launch_configuration_metadata_response_hop_limit" {
+  default = 1
+  type = number
+}
+
+variable "launch_configuration_metadata_endpoint" {
+  default = true
+  type = bool
+}