google_compute_autoscaler

resource "google_compute_autoscaler" "${MyResource}" {
   name = "example-name"
   zone = "example-zone"
   target = "example-target"
   autoscaling_policy = {
       max_replicas    = 5
       min_replicas    = 1
       cooldown_period = 60

       cpu_utilization {
           target = 0.5
       }
   }
}