terraform { required_providers { google = { source = "hashicorp/google" version = "4.83.0" } random = { source = "hashicorp/random" version = "3.5.1" } } } locals { group_uid = random_id.uid.hex name = "${var.base_name}-${var.role}-${local.group_uid}" state_disk_name = "state-disk" } resource "random_id" "uid" { byte_length = 4 } resource "google_compute_instance_template" "template" { name = local.name machine_type = var.instance_type tags = ["constellation-${var.uid}"] // Note that this is also applied as a label labels = merge(var.labels, { constellation-role = var.role, constellation-node-group = var.node_group_name, }) confidential_instance_config { enable_confidential_compute = true } disk { disk_size_gb = 10 source_image = var.image_id auto_delete = true boot = true mode = "READ_WRITE" } disk { disk_size_gb = var.disk_size disk_type = var.disk_type auto_delete = true device_name = local.state_disk_name // This name is used by disk mapper to find the disk boot = false mode = "READ_WRITE" type = "PERSISTENT" } metadata = { kube-env = var.kube_env constellation-init-secret-hash = var.init_secret_hash serial-port-enable = var.debug ? "TRUE" : "FALSE" } network_interface { network = var.network subnetwork = var.subnetwork alias_ip_range { ip_cidr_range = "/24" subnetwork_range_name = var.alias_ip_range_name } } scheduling { on_host_maintenance = "TERMINATE" } service_account { scopes = [ "https://www.googleapis.com/auth/compute", "https://www.googleapis.com/auth/servicecontrol", "https://www.googleapis.com/auth/service.management.readonly", "https://www.googleapis.com/auth/devstorage.read_only", "https://www.googleapis.com/auth/logging.write", "https://www.googleapis.com/auth/monitoring.write", "https://www.googleapis.com/auth/trace.append", "https://www.googleapis.com/auth/cloud-platform", ] } shielded_instance_config { enable_secure_boot = false enable_vtpm = true enable_integrity_monitoring = true } lifecycle { ignore_changes = [ name, # required. legacy instance templates used different naming scheme tags, labels, disk, # required. update procedure modifies the instance template externally metadata, network_interface, scheduling, service_account, shielded_instance_config, ] } } resource "google_compute_instance_group_manager" "instance_group_manager" { provider = google-beta name = local.name description = "Instance group manager for Constellation" base_instance_name = local.name zone = var.zone target_size = var.initial_count dynamic "stateful_disk" { for_each = var.role == "control-plane" ? [1] : [] content { device_name = local.state_disk_name delete_rule = "ON_PERMANENT_INSTANCE_DELETION" } } dynamic "stateful_internal_ip" { for_each = var.role == "control-plane" ? [1] : [] content { interface_name = "nic0" delete_rule = "ON_PERMANENT_INSTANCE_DELETION" } } version { instance_template = google_compute_instance_template.template.id } dynamic "named_port" { for_each = toset(var.named_ports) content { name = named_port.value.name port = named_port.value.port } } lifecycle { ignore_changes = [ name, # required. legacy instance templates used different naming scheme base_instance_name, # required. legacy instance templates used different naming scheme target_size, # required. autoscaling modifies the instance count externally version, # required. update procedure modifies the instance template externally ] } }