variable "base_name" { type = string description = "Base name of the instance group." } variable "labels" { type = map(string) default = {} description = "Labels to apply to the instance group." } variable "subnetwork" { type = string description = "Name of the subnetwork to use." } variable "zone" { type = string description = "Zone to deploy the instance group in." } variable "lb_internal_ip" { type = string description = "Internal IP of the load balancer." } variable "ports" { type = list(number) description = "Ports to forward to the load balancer." }