ECS-AutoScaling Error

resource "aws_appautoscaling_target" "ecs-running-service" {
  max_capacity = "${var.ecs_max_desired_count}"
  min_capacity = "${var.ecs_desired_count}"
  resource_id = "service/${aws_ecs_cluster.cluster.name}/${aws_ecs_service.ecs-service.name}"
  scalable_dimension = "ecs:service:DesiredCount"
  service_namespace = "ecs"
}
resource "aws_appautoscaling_policy" "ecs-decreasing-service-size" {
  depends_on = ["aws_appautoscaling_target.ecs-running-service"]
  name = "${var.ecs_policy_scaling_down}"
  policy_type = "StepScaling"
  resource_id = "service/${aws_ecs_cluster.cluster.name}/${aws_ecs_service.ecs-service.name}"
  scalable_dimension = "${aws_appautoscaling_target.ecs-running-service.scalable_dimension}"
  service_namespace = "${aws_appautoscaling_target.ecs-running-service.service_namespace}"
  step_scaling_policy_configuration {
    adjustment_type = "ChangeInCapacity"
    cooldown = 300
    metric_aggregation_type = "Average"
    step_adjustment {
        metric_interval_upper_bound = "0"
        scaling_adjustment = "-1"
    }
  }
}


resource "aws_appautoscaling_policy" "ecs-increasing-service-size" {
  depends_on = ["aws_appautoscaling_target.ecs-running-service"]
  name = "${var.telecarga_scale_out}"
  policy_type = "StepScaling"
  resource_id = "service/${aws_ecs_cluster.cluster.name}/${aws_ecs_service.ecs-service.name}"
  scalable_dimension = "ecs:service:DesiredCount"
  service_namespace = "ecs"
  step_scaling_policy_configuration {
    adjustment_type = "ChangeInCapacity"
    cooldown = 180
    metric_aggregation_type = "Average"
    step_adjustment {
      metric_interval_upper_bound = "0"
      scaling_adjustment = "2"
    }
  }
}


#CloudWatch Alarms

resource "aws_cloudwatch_metric_alarm" "ecs-cpu-high" {
  alarm_name = "${var.application_name}"
  alarm_actions = ["${aws_autoscaling_policy.autoscaling-policy-increase.arn}", "${aws_appautoscaling_policy.ecs-increasing-service-size.arn }"]
  evaluation_periods = "2"
  datapoints_to_alarm = "2"
  metric_name = "CPUUtilization"
  period = "60"
  statistic = "Average"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  namespace = "AWS/ECS"
  threshold = "15"
  alarm_description = "Monitoring CPU ECS instances utilization"
  dimensions = {
    ClusterName = "${aws_ecs_cluster.cluster.name}"
    ServiceName = "${aws_ecs_service.ecs-service.name}"
  }
}

resource "aws_cloudwatch_metric_alarm" "ecs-cpu-low" {
  alarm_name = "${var.application_name}-cpu-low"
  alarm_actions = ["${aws_appautoscaling_policy.ecs-decreasing-service-size.arn}", "${aws_autoscaling_policy.autoscaling-policy-decrease.arn}"]
  evaluation_periods = "2"
  datapoints_to_alarm = "2"
  metric_name = "CPUUtilization"
  period = "300"
  comparison_operator = "LessThanOrEqualToThreshold"
  statistic = "Average"
  namespace = "AWS/ECS"
  threshold = "5"
  alarm_description = "Monitoring CPU ECS instances utilization"
  dimensions = {
    ClusterName = "${aws_ecs_cluster.cluster.name}"
    ServiceName = "${aws_ecs_service.ecs-service.name}"
  }
}