fix psa peering routes, split files (#586)

modules/net-vpc/routes.tf

@@ -0,0 +1,90 @@
+/**
+ * Copyright 2022 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.
+ */
+
+# tfdoc:file:description Route resources.
+
+locals {
+  _routes = var.routes == null ? {} : var.routes
+  routes = {
+    gateway    = { for k, v in local._routes : k => v if v.next_hop_type == "gateway" }
+    ilb        = { for k, v in local._routes : k => v if v.next_hop_type == "ilb" }
+    instance   = { for k, v in local._routes : k => v if v.next_hop_type == "instance" }
+    ip         = { for k, v in local._routes : k => v if v.next_hop_type == "ip" }
+    vpn_tunnel = { for k, v in local._routes : k => v if v.next_hop_type == "vpn_tunnel" }
+  }
+}
+
+resource "google_compute_route" "gateway" {
+  for_each         = local.routes.gateway
+  project          = var.project_id
+  network          = local.network.name
+  name             = "${var.name}-${each.key}"
+  description      = "Terraform-managed."
+  dest_range       = each.value.dest_range
+  priority         = each.value.priority
+  tags             = each.value.tags
+  next_hop_gateway = each.value.next_hop
+}
+
+resource "google_compute_route" "ilb" {
+  for_each     = local.routes.ilb
+  project      = var.project_id
+  network      = local.network.name
+  name         = "${var.name}-${each.key}"
+  description  = "Terraform-managed."
+  dest_range   = each.value.dest_range
+  priority     = each.value.priority
+  tags         = each.value.tags
+  next_hop_ilb = each.value.next_hop
+}
+
+resource "google_compute_route" "instance" {
+  for_each          = local.routes.instance
+  project           = var.project_id
+  network           = local.network.name
+  name              = "${var.name}-${each.key}"
+  description       = "Terraform-managed."
+  dest_range        = each.value.dest_range
+  priority          = each.value.priority
+  tags              = each.value.tags
+  next_hop_instance = each.value.next_hop
+  # not setting the instance zone will trigger a refresh
+  next_hop_instance_zone = regex("zones/([^/]+)/", each.value.next_hop)[0]
+}
+
+resource "google_compute_route" "ip" {
+  for_each    = local.routes.ip
+  project     = var.project_id
+  network     = local.network.name
+  name        = "${var.name}-${each.key}"
+  description = "Terraform-managed."
+  dest_range  = each.value.dest_range
+  priority    = each.value.priority
+  tags        = each.value.tags
+  next_hop_ip = each.value.next_hop
+}
+
+resource "google_compute_route" "vpn_tunnel" {
+  for_each            = local.routes.vpn_tunnel
+  project             = var.project_id
+  network             = local.network.name
+  name                = "${var.name}-${each.key}"
+  description         = "Terraform-managed."
+  dest_range          = each.value.dest_range
+  priority            = each.value.priority
+  tags                = each.value.tags
+  next_hop_vpn_tunnel = each.value.next_hop
+}