feat: Support Private DNS name options (#370)

Co-authored-by: Bryant Biggs <bryantbiggs@gmail.com>

Author: angryhamsterx

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/antonbabenko/pre-commit-terraform
-    rev: v1.83.0
+    rev: v1.86.0
     hooks:
       - id: terraform_fmt
       - id: terraform_wrapper_module_for_each
@@ -24,7 +24,7 @@ repos:
           - '--args=--only=terraform_standard_module_structure'
           - '--args=--only=terraform_workspace_remote'
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
+    rev: v4.5.0
     hooks:
       - id: check-merge-conflict
       - id: end-of-file-fixer

README.md

@@ -237,6 +237,7 @@ No modules.
 | <a name="input_name"></a> [name](#input\_name) | Name to be used on EC2 instance created | `string` | `""` | no |
 | <a name="input_network_interface"></a> [network\_interface](#input\_network\_interface) | Customize network interfaces to be attached at instance boot time | `list(map(string))` | `[]` | no |
 | <a name="input_placement_group"></a> [placement\_group](#input\_placement\_group) | The Placement Group to start the instance in | `string` | `null` | no |
+| <a name="input_private_dns_name_options"></a> [private\_dns\_name\_options](#input\_private\_dns\_name\_options) | Customize the private DNS name options of the instance | `map(string)` | `{}` | no |
 | <a name="input_private_ip"></a> [private\_ip](#input\_private\_ip) | Private IP address to associate with the instance in a VPC | `string` | `null` | no |
 | <a name="input_putin_khuylo"></a> [putin\_khuylo](#input\_putin\_khuylo) | Do you agree that Putin doesn't respect Ukrainian sovereignty and territorial integrity? More info: https://en.wikipedia.org/wiki/Putin_khuylo! | `bool` | `true` | no |
 | <a name="input_root_block_device"></a> [root\_block\_device](#input\_root\_block\_device) | Customize details about the root block device of the instance. See Block Devices below for details | `list(any)` | `[]` | no |

main.tf

@@ -138,6 +138,16 @@ resource "aws_instance" "this" {
     }
   }
 
+  dynamic "private_dns_name_options" {
+    for_each = length(var.private_dns_name_options) > 0 ? [var.private_dns_name_options] : []
+
+    content {
+      hostname_type                        = try(private_dns_name_options.value.hostname_type, null)
+      enable_resource_name_dns_a_record    = try(private_dns_name_options.value.enable_resource_name_dns_a_record, null)
+      enable_resource_name_dns_aaaa_record = try(private_dns_name_options.value.enable_resource_name_dns_aaaa_record, null)
+    }
+  }
+
   dynamic "launch_template" {
     for_each = length(var.launch_template) > 0 ? [var.launch_template] : []
 
@@ -306,6 +316,16 @@ resource "aws_instance" "ignore_ami" {
     }
   }
 
+  dynamic "private_dns_name_options" {
+    for_each = length(var.private_dns_name_options) > 0 ? [var.private_dns_name_options] : []
+
+    content {
+      hostname_type                        = try(private_dns_name_options.value.hostname_type, null)
+      enable_resource_name_dns_a_record    = try(private_dns_name_options.value.enable_resource_name_dns_a_record, null)
+      enable_resource_name_dns_aaaa_record = try(private_dns_name_options.value.enable_resource_name_dns_aaaa_record, null)
+    }
+  }
+
   dynamic "launch_template" {
     for_each = length(var.launch_template) > 0 ? [var.launch_template] : []
 

variables.tf

@@ -176,6 +176,12 @@ variable "network_interface" {
   default     = []
 }
 
+variable "private_dns_name_options" {
+  description = "Customize the private DNS name options of the instance"
+  type        = map(string)
+  default     = {}
+}
+
 variable "placement_group" {
   description = "The Placement Group to start the instance in"
   type        = string

wrappers/main.tf

@@ -3,74 +3,75 @@ module "wrapper" {
 
   for_each = var.items
 
-  create                               = try(each.value.create, var.defaults.create, true)
-  name                                 = try(each.value.name, var.defaults.name, "")
-  ami_ssm_parameter                    = try(each.value.ami_ssm_parameter, var.defaults.ami_ssm_parameter, "/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2")
   ami                                  = try(each.value.ami, var.defaults.ami, null)
-  ignore_ami_changes                   = try(each.value.ignore_ami_changes, var.defaults.ignore_ami_changes, false)
+  ami_ssm_parameter                    = try(each.value.ami_ssm_parameter, var.defaults.ami_ssm_parameter, "/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2")
   associate_public_ip_address          = try(each.value.associate_public_ip_address, var.defaults.associate_public_ip_address, null)
-  maintenance_options                  = try(each.value.maintenance_options, var.defaults.maintenance_options, {})
   availability_zone                    = try(each.value.availability_zone, var.defaults.availability_zone, null)
   capacity_reservation_specification   = try(each.value.capacity_reservation_specification, var.defaults.capacity_reservation_specification, {})
+  cpu_core_count                       = try(each.value.cpu_core_count, var.defaults.cpu_core_count, null)
   cpu_credits                          = try(each.value.cpu_credits, var.defaults.cpu_credits, null)
+  cpu_options                          = try(each.value.cpu_options, var.defaults.cpu_options, {})
+  cpu_threads_per_core                 = try(each.value.cpu_threads_per_core, var.defaults.cpu_threads_per_core, null)
+  create                               = try(each.value.create, var.defaults.create, true)
+  create_iam_instance_profile          = try(each.value.create_iam_instance_profile, var.defaults.create_iam_instance_profile, false)
+  create_spot_instance                 = try(each.value.create_spot_instance, var.defaults.create_spot_instance, false)
+  disable_api_stop                     = try(each.value.disable_api_stop, var.defaults.disable_api_stop, null)
   disable_api_termination              = try(each.value.disable_api_termination, var.defaults.disable_api_termination, null)
   ebs_block_device                     = try(each.value.ebs_block_device, var.defaults.ebs_block_device, [])
   ebs_optimized                        = try(each.value.ebs_optimized, var.defaults.ebs_optimized, null)
+  enable_volume_tags                   = try(each.value.enable_volume_tags, var.defaults.enable_volume_tags, true)
   enclave_options_enabled              = try(each.value.enclave_options_enabled, var.defaults.enclave_options_enabled, null)
   ephemeral_block_device               = try(each.value.ephemeral_block_device, var.defaults.ephemeral_block_device, [])
   get_password_data                    = try(each.value.get_password_data, var.defaults.get_password_data, null)
   hibernation                          = try(each.value.hibernation, var.defaults.hibernation, null)
   host_id                              = try(each.value.host_id, var.defaults.host_id, null)
   iam_instance_profile                 = try(each.value.iam_instance_profile, var.defaults.iam_instance_profile, null)
+  iam_role_description                 = try(each.value.iam_role_description, var.defaults.iam_role_description, null)
+  iam_role_name                        = try(each.value.iam_role_name, var.defaults.iam_role_name, null)
+  iam_role_path                        = try(each.value.iam_role_path, var.defaults.iam_role_path, null)
+  iam_role_permissions_boundary        = try(each.value.iam_role_permissions_boundary, var.defaults.iam_role_permissions_boundary, null)
+  iam_role_policies                    = try(each.value.iam_role_policies, var.defaults.iam_role_policies, {})
+  iam_role_tags                        = try(each.value.iam_role_tags, var.defaults.iam_role_tags, {})
+  iam_role_use_name_prefix             = try(each.value.iam_role_use_name_prefix, var.defaults.iam_role_use_name_prefix, true)
+  ignore_ami_changes                   = try(each.value.ignore_ami_changes, var.defaults.ignore_ami_changes, false)
   instance_initiated_shutdown_behavior = try(each.value.instance_initiated_shutdown_behavior, var.defaults.instance_initiated_shutdown_behavior, null)
-  instance_type                        = try(each.value.instance_type, var.defaults.instance_type, "t3.micro")
   instance_tags                        = try(each.value.instance_tags, var.defaults.instance_tags, {})
+  instance_type                        = try(each.value.instance_type, var.defaults.instance_type, "t3.micro")
   ipv6_address_count                   = try(each.value.ipv6_address_count, var.defaults.ipv6_address_count, null)
   ipv6_addresses                       = try(each.value.ipv6_addresses, var.defaults.ipv6_addresses, null)
   key_name                             = try(each.value.key_name, var.defaults.key_name, null)
   launch_template                      = try(each.value.launch_template, var.defaults.launch_template, {})
+  maintenance_options                  = try(each.value.maintenance_options, var.defaults.maintenance_options, {})
   metadata_options = try(each.value.metadata_options, var.defaults.metadata_options, {
     "http_endpoint"               = "enabled"
     "http_put_response_hop_limit" = 1
     "http_tokens"                 = "optional"
   })
   monitoring                          = try(each.value.monitoring, var.defaults.monitoring, null)
+  name                                = try(each.value.name, var.defaults.name, "")
   network_interface                   = try(each.value.network_interface, var.defaults.network_interface, [])
   placement_group                     = try(each.value.placement_group, var.defaults.placement_group, null)
+  private_dns_name_options            = try(each.value.private_dns_name_options, var.defaults.private_dns_name_options, {})
   private_ip                          = try(each.value.private_ip, var.defaults.private_ip, null)
+  putin_khuylo                        = try(each.value.putin_khuylo, var.defaults.putin_khuylo, true)
   root_block_device                   = try(each.value.root_block_device, var.defaults.root_block_device, [])
   secondary_private_ips               = try(each.value.secondary_private_ips, var.defaults.secondary_private_ips, null)
   source_dest_check                   = try(each.value.source_dest_check, var.defaults.source_dest_check, null)
+  spot_block_duration_minutes         = try(each.value.spot_block_duration_minutes, var.defaults.spot_block_duration_minutes, null)
+  spot_instance_interruption_behavior = try(each.value.spot_instance_interruption_behavior, var.defaults.spot_instance_interruption_behavior, null)
+  spot_launch_group                   = try(each.value.spot_launch_group, var.defaults.spot_launch_group, null)
+  spot_price                          = try(each.value.spot_price, var.defaults.spot_price, null)
+  spot_type                           = try(each.value.spot_type, var.defaults.spot_type, null)
+  spot_valid_from                     = try(each.value.spot_valid_from, var.defaults.spot_valid_from, null)
+  spot_valid_until                    = try(each.value.spot_valid_until, var.defaults.spot_valid_until, null)
+  spot_wait_for_fulfillment           = try(each.value.spot_wait_for_fulfillment, var.defaults.spot_wait_for_fulfillment, null)
   subnet_id                           = try(each.value.subnet_id, var.defaults.subnet_id, null)
   tags                                = try(each.value.tags, var.defaults.tags, {})
   tenancy                             = try(each.value.tenancy, var.defaults.tenancy, null)
+  timeouts                            = try(each.value.timeouts, var.defaults.timeouts, {})
   user_data                           = try(each.value.user_data, var.defaults.user_data, null)
   user_data_base64                    = try(each.value.user_data_base64, var.defaults.user_data_base64, null)
   user_data_replace_on_change         = try(each.value.user_data_replace_on_change, var.defaults.user_data_replace_on_change, null)
   volume_tags                         = try(each.value.volume_tags, var.defaults.volume_tags, {})
-  enable_volume_tags                  = try(each.value.enable_volume_tags, var.defaults.enable_volume_tags, true)
   vpc_security_group_ids              = try(each.value.vpc_security_group_ids, var.defaults.vpc_security_group_ids, null)
-  timeouts                            = try(each.value.timeouts, var.defaults.timeouts, {})
-  cpu_options                         = try(each.value.cpu_options, var.defaults.cpu_options, {})
-  cpu_core_count                      = try(each.value.cpu_core_count, var.defaults.cpu_core_count, null)
-  cpu_threads_per_core                = try(each.value.cpu_threads_per_core, var.defaults.cpu_threads_per_core, null)
-  create_spot_instance                = try(each.value.create_spot_instance, var.defaults.create_spot_instance, false)
-  spot_price                          = try(each.value.spot_price, var.defaults.spot_price, null)
-  spot_wait_for_fulfillment           = try(each.value.spot_wait_for_fulfillment, var.defaults.spot_wait_for_fulfillment, null)
-  spot_type                           = try(each.value.spot_type, var.defaults.spot_type, null)
-  spot_launch_group                   = try(each.value.spot_launch_group, var.defaults.spot_launch_group, null)
-  spot_block_duration_minutes         = try(each.value.spot_block_duration_minutes, var.defaults.spot_block_duration_minutes, null)
-  spot_instance_interruption_behavior = try(each.value.spot_instance_interruption_behavior, var.defaults.spot_instance_interruption_behavior, null)
-  spot_valid_until                    = try(each.value.spot_valid_until, var.defaults.spot_valid_until, null)
-  spot_valid_from                     = try(each.value.spot_valid_from, var.defaults.spot_valid_from, null)
-  disable_api_stop                    = try(each.value.disable_api_stop, var.defaults.disable_api_stop, null)
-  putin_khuylo                        = try(each.value.putin_khuylo, var.defaults.putin_khuylo, true)
-  create_iam_instance_profile         = try(each.value.create_iam_instance_profile, var.defaults.create_iam_instance_profile, false)
-  iam_role_name                       = try(each.value.iam_role_name, var.defaults.iam_role_name, null)
-  iam_role_use_name_prefix            = try(each.value.iam_role_use_name_prefix, var.defaults.iam_role_use_name_prefix, true)
-  iam_role_path                       = try(each.value.iam_role_path, var.defaults.iam_role_path, null)
-  iam_role_description                = try(each.value.iam_role_description, var.defaults.iam_role_description, null)
-  iam_role_permissions_boundary       = try(each.value.iam_role_permissions_boundary, var.defaults.iam_role_permissions_boundary, null)
-  iam_role_policies                   = try(each.value.iam_role_policies, var.defaults.iam_role_policies, {})
-  iam_role_tags                       = try(each.value.iam_role_tags, var.defaults.iam_role_tags, {})
 }