fix nat defaults, add license to all tf files

Author: umairidris

modules/interconnect_attachment/main.tf

@@ -1,3 +1,19 @@
+/**
+ * Copyright 2020 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.
+ */
+
 resource "google_compute_interconnect_attachment" "attachment" {
   name          = var.name
   router        = var.router

modules/interface/main.tf

@@ -1,3 +1,19 @@
+/**
+ * Copyright 2020 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.
+ */
+
 resource "google_compute_router_interface" "interface" {
   name                    = var.name
   project                 = var.project

nat.tf

@@ -1,3 +1,19 @@
+/**
+ * Copyright 2020 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.
+ */
+
 resource "google_compute_router_nat" "nats" {
   for_each = {
     for n in var.nats :
@@ -13,10 +29,10 @@ resource "google_compute_router_nat" "nats" {
 
   nat_ips                          = lookup(each.value, "nat_ips", [])
   min_ports_per_vm                 = lookup(each.value, "min_ports_per_vm", 0)
-  udp_idle_timeout_sec             = lookup(each.value, "udp_idle_timeout_sec", null)
-  icmp_idle_timeout_sec            = lookup(each.value, "icmp_idle_timeout_sec", null)
-  tcp_established_idle_timeout_sec = lookup(each.value, "tcp_established_idle_timeout_sec", null)
-  tcp_transitory_idle_timeout_sec  = lookup(each.value, "tcp_transitory_idle_timeout_sec", null)
+  udp_idle_timeout_sec             = lookup(each.value, "udp_idle_timeout_sec", 30)
+  icmp_idle_timeout_sec            = lookup(each.value, "icmp_idle_timeout_sec", 30)
+  tcp_established_idle_timeout_sec = lookup(each.value, "tcp_established_idle_timeout_sec", 1200)
+  tcp_transitory_idle_timeout_sec  = lookup(each.value, "tcp_transitory_idle_timeout_sec", 30)
 
   dynamic "subnetwork" {
     for_each = lookup(each.value, "subnetworks", [])