feat: Add option to create/delete NAT Gateway route for private route tables (#1127)

Author: ixolt

README.md

@@ -374,6 +374,7 @@ No modules.
 | <a name="input_create_igw"></a> [create\_igw](#input\_create\_igw) | Controls if an Internet Gateway is created for public subnets and the related routes that connect them | `bool` | `true` | no |
 | <a name="input_create_multiple_intra_route_tables"></a> [create\_multiple\_intra\_route\_tables](#input\_create\_multiple\_intra\_route\_tables) | Indicates whether to create a separate route table for each intra subnet. Default: `false` | `bool` | `false` | no |
 | <a name="input_create_multiple_public_route_tables"></a> [create\_multiple\_public\_route\_tables](#input\_create\_multiple\_public\_route\_tables) | Indicates whether to create a separate route table for each public subnet. Default: `false` | `bool` | `false` | no |
+| <a name="input_create_private_nat_gateway_route"></a> [create\_private\_nat\_gateway\_route](#input\_create\_private\_nat\_gateway\_route) | Controls if a nat gateway route should be created to give internet access to the private subnets | `bool` | `true` | no |
 | <a name="input_create_redshift_subnet_group"></a> [create\_redshift\_subnet\_group](#input\_create\_redshift\_subnet\_group) | Controls if redshift subnet group should be created | `bool` | `true` | no |
 | <a name="input_create_redshift_subnet_route_table"></a> [create\_redshift\_subnet\_route\_table](#input\_create\_redshift\_subnet\_route\_table) | Controls if separate route table for redshift should be created | `bool` | `false` | no |
 | <a name="input_create_vpc"></a> [create\_vpc](#input\_create\_vpc) | Controls if VPC should be created (it affects almost all resources) | `bool` | `true` | no |

main.tf

@@ -1102,7 +1102,7 @@ resource "aws_nat_gateway" "this" {
 }
 
 resource "aws_route" "private_nat_gateway" {
-  count = local.create_vpc && var.enable_nat_gateway ? local.nat_gateway_count : 0
+  count = local.create_vpc && var.enable_nat_gateway && var.create_private_nat_gateway_route ? local.nat_gateway_count : 0
 
   route_table_id         = element(aws_route_table.private[*].id, count.index)
   destination_cidr_block = var.nat_gateway_destination_cidr_block

variables.tf

@@ -372,6 +372,12 @@ variable "private_subnet_suffix" {
   default     = "private"
 }
 
+variable "create_private_nat_gateway_route" {
+  description = "Controls if a nat gateway route should be created to give internet access to the private subnets"
+  type        = bool
+  default     = true
+}
+
 variable "private_subnet_tags" {
   description = "Additional tags for the private subnets"
   type        = map(string)