Create Auto Scaling Group Policy - using Average Network Out metric type

myservice.tf

resource "aws_autoscaling_policy" "myservice-asg-policy" {
  name        = "myservice-asg-policy"
  policy_type = "TargetTrackingScaling"
  target_tracking_configuration {
    predefined_metric_specification {
      predefined_metric_type = "ASGAverageNetworkOut"
    }
    target_value = 800000000
  }
  autoscaling_group_name = "${module.myservice.asg_name}"
}