Manage Default Route Table under Terraform (terraform-aws-modules#69)

* Manage Default Route Table under Terraform

- With name
- And Tags

* Use `aws_default_route_table` instead

* Added aws_main_route_table_association resource

* Update main.tf

Author: lawliet89

main.tf

@@ -333,3 +333,17 @@ resource "aws_vpn_gateway" "this" {
 
   tags = "${merge(var.tags, map("Name", format("%s", var.name)))}"
 }
+
+###########
+# Defaults
+###########
+resource "aws_default_route_table" "default" {
+  default_route_table_id = "${aws_vpc.this.default_route_table_id}"
+
+  tags = "${merge(var.tags, var.default_route_table_tags, map("Name", format("%s-default", var.name)))}"
+}
+
+resource "aws_main_route_table_association" "default" {
+  vpc_id         = "${aws_vpc.this.id}"
+  route_table_id = "${aws_default_route_table.default.default_route_table_id}"
+}

variables.tf

@@ -132,6 +132,11 @@ variable "private_subnet_tags" {
   default     = {}
 }
 
+variable "default_route_table_tags" {
+  description = "Additional tags for the default route table"
+  default     = {}
+}
+
 variable "public_route_table_tags" {
   description = "Additional tags for the public route tables"
   default     = {}