cloud-composer-etl/infra/network.tf

# Copyright 2023 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
#
#     https://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.


resource "google_compute_network" "vpc_network" {
  name                    = var.network_name
  description             = "VPC for Data Platform"
  routing_mode            = "GLOBAL"
  auto_create_subnetworks = false
}

resource "google_compute_subnetwork" "composer_subnetwork" {
  name                     = var.composer_env_name
  ip_cidr_range            = var.composer_ip_ranges.nodes
  region                   = var.region
  network                  = google_compute_network.vpc_network.id
  private_ip_google_access = true

  secondary_ip_range {
    range_name    = "pods"
    ip_cidr_range = var.composer_ip_ranges.pods
  }
  secondary_ip_range {
    range_name    = "services"
    ip_cidr_range = var.composer_ip_ranges.services
  }
}


resource "google_compute_global_address" "service_range" {
  name          = "service-networking-address"
  purpose       = "VPC_PEERING"
  address_type  = "INTERNAL"
  address       = "10.200.0.0"
  prefix_length = 16
  network       = google_compute_network.vpc_network.id
}

resource "google_service_networking_connection" "private_service_connection" {
  network                 = google_compute_network.vpc_network.id
  service                 = "servicenetworking.googleapis.com"
  reserved_peering_ranges = [google_compute_global_address.service_range.name]
}

resource "google_compute_router" "nat_router" {
  name    = "${google_compute_network.vpc_network.name}-nat-router"
  network = google_compute_network.vpc_network.id
  region  = var.region

  bgp {
    asn = 64514
  }
}

resource "google_compute_router_nat" "nat_gateway" {
  name                               = "${google_compute_network.vpc_network.name}-nat-gw"
  router                             = google_compute_router.nat_router.name
  region                             = google_compute_router.nat_router.region
  nat_ip_allocate_option             = "AUTO_ONLY"
  source_subnetwork_ip_ranges_to_nat = "ALL_SUBNETWORKS_ALL_IP_RANGES"

  log_config {
    enable = true
    filter = "ERRORS_ONLY"
  }
}