Demonstrate conservative RFC1918 IP address use on GKE.

This is a terraform config demonstrating spinning up 14 clusters in only a /26 (64 addresses) to demonstrate the GKE clusters do not need to consume large amounts of RFC1918 IP addresses.

terraform/modules/nginx_ingress_controller/main.tf

@@ -0,0 +1,27 @@
+terraform {
+  required_providers {
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = ">= 2.36.0"
+    }
+  }
+}
+
+data "google_client_config" "default" {}
+
+resource "kubernetes_cluster_role_binding" "cluster_admin_binding" {
+  metadata {
+    name = "cluster-admin-binding"
+  }
+
+  subject {
+    kind = "User"
+    name = data.google_client_config.default.id
+  }
+
+  role_ref {
+    api_group = "rbac.authorization.k8s.io"
+    kind      = "ClusterRole"
+    name      = "cluster-admin"
+  }
+}