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main.tf
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main.tf
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/**
* Copyright 2019 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/******************************************
Shared VPC configuration
*****************************************/
locals {
vpc_name = "${var.environment_code}-shared-${var.vpc_label}"
network_name = "vpc-${local.vpc_name}"
private_googleapis_cidr = "199.36.153.8/30"
}
module "main" {
source = "terraform-google-modules/network/google"
version = "~> 2.0"
project_id = var.project_id
network_name = local.network_name
shared_vpc_host = "true"
delete_default_internet_gateway_routes = "true"
subnets = var.subnets
secondary_ranges = var.secondary_ranges
routes = concat(
[{
name = "rt-${local.vpc_name}-1000-all-default-private-api"
description = "Route through IGW to allow private google api access."
destination_range = "199.36.153.8/30"
next_hop_internet = "true"
priority = "1000"
}],
var.nat_enabled ?
[
{
name = "rt-${local.vpc_name}-1000-egress-internet-default"
description = "Tag based route through IGW to access internet"
destination_range = "0.0.0.0/0"
tags = "egress-internet"
next_hop_internet = "true"
priority = "1000"
}
]
: [],
var.windows_activation_enabled ?
[{
name = "rt-${local.vpc_name}-1000-all-default-windows-kms"
description = "Route through IGW to allow Windows KMS activation for GCP."
destination_range = "35.190.247.13/32"
next_hop_internet = "true"
priority = "1000"
}
]
: []
)
}
/***************************************************************
Configure Service Networking for Cloud SQL & future services.
**************************************************************/
resource "google_compute_global_address" "private_service_access_address" {
name = "ga-${local.vpc_name}-vpc-peering-internal"
project = var.project_id
purpose = "VPC_PEERING"
address_type = "INTERNAL"
address = element(split("/", var.private_service_cidr), 0)
prefix_length = element(split("/", var.private_service_cidr), 1)
network = module.main.network_self_link
}
resource "google_service_networking_connection" "private_vpc_connection" {
network = module.main.network_self_link
service = "servicenetworking.googleapis.com"
reserved_peering_ranges = [google_compute_global_address.private_service_access_address.name]
}
/************************************
Router to advertise shared VPC
subnetworks and Google Private API
************************************/
module "region1_router1" {
source = "terraform-google-modules/cloud-router/google"
version = "~> 0.2.0"
name = "cr-${local.vpc_name}-${var.default_region1}-cr1"
project = var.project_id
network = module.main.network_name
region = var.default_region1
bgp = {
asn = var.bgp_asn_subnet
advertised_groups = ["ALL_SUBNETS"]
advertised_ip_ranges = [{ range = local.private_googleapis_cidr }]
}
}
module "region1_router2" {
source = "terraform-google-modules/cloud-router/google"
version = "~> 0.2.0"
name = "cr-${local.vpc_name}-${var.default_region1}-cr2"
project = var.project_id
network = module.main.network_name
region = var.default_region1
bgp = {
asn = var.bgp_asn_subnet
advertised_groups = ["ALL_SUBNETS"]
advertised_ip_ranges = [{ range = local.private_googleapis_cidr }]
}
}
module "region2_router1" {
source = "terraform-google-modules/cloud-router/google"
version = "~> 0.2.0"
name = "cr-${local.vpc_name}-${var.default_region2}-cr1"
project = var.project_id
network = module.main.network_name
region = var.default_region2
bgp = {
asn = var.bgp_asn_subnet
advertised_groups = ["ALL_SUBNETS"]
advertised_ip_ranges = [{ range = local.private_googleapis_cidr }]
}
}
module "region2_router2" {
source = "terraform-google-modules/cloud-router/google"
version = "~> 0.2.0"
name = "cr-${local.vpc_name}-${var.default_region2}-cr2"
project = var.project_id
network = module.main.network_name
region = var.default_region2
bgp = {
asn = var.bgp_asn_subnet
advertised_groups = ["ALL_SUBNETS"]
advertised_ip_ranges = [{ range = local.private_googleapis_cidr }]
}
}