Merge pull request terraform-aws-modules#201 from ebarault/feat/database-route-to-natgw

adding option to create a route to nat gateway in database subnets

Author: antonbabenko

main.tf

@@ -122,7 +122,7 @@ resource "aws_route_table" "database" {
 }
 
 resource "aws_route" "database_internet_gateway" {
- count = "${var.create_vpc && var.create_database_subnet_route_table && length(var.database_subnets) > 0 && var.create_database_internet_gateway_route ? 1 : 0}"
+ count = "${var.create_vpc && var.create_database_subnet_route_table && length(var.database_subnets) > 0 && var.create_database_internet_gateway_route && !var.create_database_nat_gateway_route ? 1 : 0}"
 
  route_table_id = "${aws_route_table.database.id}"
  destination_cidr_block = "0.0.0.0/0"
@@ -133,6 +133,17 @@ resource "aws_route" "database_internet_gateway" {
  }
 }
 
+resource "aws_route" "database_nat_gateway" {
+ count = "${var.create_vpc && var.enable_nat_gateway && var.create_database_subnet_route_table && length(var.database_subnets) > 0 && var.create_database_nat_gateway_route && !var.create_database_internet_gateway_route ? local.nat_gateway_count : 0}"
+ route_table_id = "${element(aws_route_table.private.*.id, count.index)}"
+ destination_cidr_block = "0.0.0.0/0"
+ nat_gateway_id = "${element(aws_nat_gateway.this.*.id, count.index)}"
+
+ timeouts {
+ create = "5m"
+ }
+}
+
 #################
 # Redshift routes
 #################

variables.tf

@@ -122,6 +122,11 @@ variable "create_database_internet_gateway_route" {
  default = false
 }
 
+variable "create_database_nat_gateway_route" {
+ description = "Controls if a nat gateway route should be created to give internet access to the database subnets"
+ default = false
+}
+
 variable "azs" {
  description = "A list of availability zones in the region"
  default = []