feat: default tgw route table tags (#49)

Author: tfhartmann

README.md

@@ -85,6 +85,7 @@ No modules.
 
 | Name | Type |
 |------|------|
+| [aws_ec2_tag.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_tag) | resource |
 | [aws_ec2_transit_gateway.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_transit_gateway) | resource |
 | [aws_ec2_transit_gateway_route.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_transit_gateway_route) | resource |
 | [aws_ec2_transit_gateway_route_table.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_transit_gateway_route_table) | resource |
@@ -116,6 +117,7 @@ No modules.
 | <a name="input_ram_tags"></a> [ram\_tags](#input\_ram\_tags) | Additional tags for the RAM | `map(string)` | `{}` | no |
 | <a name="input_share_tgw"></a> [share\_tgw](#input\_share\_tgw) | Whether to share your transit gateway with other accounts | `bool` | `true` | no |
 | <a name="input_tags"></a> [tags](#input\_tags) | A map of tags to add to all resources | `map(string)` | `{}` | no |
+| <a name="input_tgw_default_route_table_tags"></a> [tgw\_default\_route\_table\_tags](#input\_tgw\_default\_route\_table\_tags) | Additional tags for the Default TGW route table | `map(string)` | `{}` | no |
 | <a name="input_tgw_route_table_tags"></a> [tgw\_route\_table\_tags](#input\_tgw\_route\_table\_tags) | Additional tags for the TGW route table | `map(string)` | `{}` | no |
 | <a name="input_tgw_tags"></a> [tgw\_tags](#input\_tgw\_tags) | Additional tags for the TGW | `map(string)` | `{}` | no |
 | <a name="input_tgw_vpc_attachment_tags"></a> [tgw\_vpc\_attachment\_tags](#input\_tgw\_vpc\_attachment\_tags) | Additional tags for VPC attachments | `map(string)` | `{}` | no |

main.tf

@@ -11,6 +11,14 @@ locals {
   vpc_attachments_with_routes = chunklist(flatten([
     for k, v in var.vpc_attachments : setproduct([{ key = k }], v["tgw_routes"]) if length(lookup(v, "tgw_routes", {})) > 0
   ]), 2)
+
+  tgw_default_route_table_tags_merged = merge(
+    {
+      "Name" = format("%s", var.name)
+    },
+    var.tags,
+    var.tgw_default_route_table_tags,
+  )
 }
 
 resource "aws_ec2_transit_gateway" "this" {
@@ -33,6 +41,13 @@ resource "aws_ec2_transit_gateway" "this" {
   )
 }
 
+resource "aws_ec2_tag" "this" {
+  for_each    = var.create_tgw ? local.tgw_default_route_table_tags_merged : {}
+  resource_id = aws_ec2_transit_gateway.this[0].association_default_route_table_id
+  key         = each.key
+  value       = each.value
+}
+
 #########################
 # Route table and routes
 #########################

variables.tf

@@ -85,6 +85,12 @@ variable "tgw_route_table_tags" {
   default     = {}
 }
 
+variable "tgw_default_route_table_tags" {
+  description = "Additional tags for the Default TGW route table"
+  type        = map(string)
+  default     = {}
+}
+
 variable "tgw_vpc_attachment_tags" {
   description = "Additional tags for VPC attachments"
   type        = map(string)