commit new files

modules/compute_engine_instance_group/main.tf

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+resource "google_compute_instance_group_manager" "instance_group" {
+  name        = "instance-group"
+  project     = var.project_id
+  region      = var.region
+  base_instance_name = "instance"
+  instance_template = var.template_self_link
+  target_size  = 2
+}
+

modules/compute_engine_instance_group/outputs.tf

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+output "self_link" {
+  value = google_compute_instance_group_manager.instance_group.instance_group
+}

modules/compute_engine_instance_group/variables.tf

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+variable "project_id" {}
+variable "region" {}
+variable "template_self_link" {}