[umig] Add external ips support.

Author: omazin

examples/umig/full/main.tf

@@ -21,6 +21,17 @@ provider "google" {
   version     = "~> 2.7.0"
 }
 
+resource "google_compute_address" "ip_address" {
+  name = "external-ip"
+}
+
+locals {
+  access_config = {
+    nat_ip       = google_compute_address.ip_address.address
+    network_tier = "PREMIUM"
+  }
+}
+
 module "instance_template" {
   source          = "../../../modules/instance_template"
   name_prefix     = "${var.hostname}-instance-template"
@@ -61,4 +72,5 @@ module "umig" {
   num_instances      = var.target_size
   instance_template  = module.instance_template.self_link
   named_ports        = var.named_ports
+  access_config      = [local.access_config]
 }

modules/umig/main.tf

@@ -53,6 +53,14 @@ resource "google_compute_instance_from_template" "compute_instance" {
     network_ip         = length(var.static_ips) == 0 ? "" : element(local.static_ips, count.index)
   }
 
+  dynamic "access_config" {
+    for_each = var.access_config
+    content {
+      nat_ip       = access_config.value.nat_ip
+      network_tier = access_config.value.network_tier
+    }
+  }
+
   source_instance_template = var.instance_template
 }
 

modules/umig/variables.tf

@@ -64,3 +64,11 @@ variable "instance_template" {
   description = "Instance template self_link used to create compute instances"
 }
 
+variable "access_config" {
+  description = "Access configurations, i.e. IPs via which the VM instance can be accessed via the Internet."
+  type        = list(object({
+    nat_ip       = string
+    network_tier = string
+  }))
+  default     = []
+}