AWS::AutoScaling::ScalingPolicy PredictiveScalingConfiguration - AWS CloudFormation

AWS::AutoScaling::ScalingPolicy PredictiveScalingConfiguration

PredictiveScalingConfiguration is a property of the AWS::AutoScaling::ScalingPolicy resource that specifies a predictive scaling policy for Amazon EC2 Auto Scaling.

For more information, see PutScalingPolicy in the Amazon EC2 Auto Scaling API Reference and Predictive scaling in the Amazon EC2 Auto Scaling User Guide.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

Properties

MaxCapacityBreachBehavior

Defines the behavior that should be applied if the forecast capacity approaches or exceeds the maximum capacity of the Auto Scaling group. Defaults to HonorMaxCapacity if not specified.

The following are possible values:

  • HonorMaxCapacity - Amazon EC2 Auto Scaling cannot scale out capacity higher than the maximum capacity. The maximum capacity is enforced as a hard limit.

  • IncreaseMaxCapacity - Amazon EC2 Auto Scaling can scale out capacity higher than the maximum capacity when the forecast capacity is close to or exceeds the maximum capacity. The upper limit is determined by the forecasted capacity and the value for MaxCapacityBuffer.

Required: No

Type: String

Allowed values: HonorMaxCapacity | IncreaseMaxCapacity

Update requires: No interruption

MaxCapacityBuffer

The size of the capacity buffer to use when the forecast capacity is close to or exceeds the maximum capacity. The value is specified as a percentage relative to the forecast capacity. For example, if the buffer is 10, this means a 10 percent buffer, such that if the forecast capacity is 50, and the maximum capacity is 40, then the effective maximum capacity is 55.

If set to 0, Amazon EC2 Auto Scaling may scale capacity higher than the maximum capacity to equal but not exceed forecast capacity.

Required if the MaxCapacityBreachBehavior property is set to IncreaseMaxCapacity, and cannot be used otherwise.

Required: No

Type: Integer

Minimum: 0

Maximum: 100

Update requires: No interruption

MetricSpecifications

An array that contains information about the metrics and target utilization to use for predictive scaling.

Note

Adding more than one predictive scaling metric specification to the array is currently not supported.

Required: Yes

Type: List of PredictiveScalingMetricSpecification

Update requires: No interruption

Mode

The predictive scaling mode. Defaults to ForecastOnly if not specified.

Required: No

Type: String

Allowed values: ForecastAndScale | ForecastOnly

Update requires: No interruption

SchedulingBufferTime

The amount of time, in seconds, by which the instance launch time can be advanced. For example, the forecast says to add capacity at 10:00 AM, and you choose to pre-launch instances by 5 minutes. In that case, the instances will be launched at 9:55 AM. The intention is to give resources time to be provisioned. It can take a few minutes to launch an EC2 instance. The actual amount of time required depends on several factors, such as the size of the instance and whether there are startup scripts to complete.

The value must be less than the forecast interval duration of 3600 seconds (60 minutes). Defaults to 300 seconds if not specified.

Required: No

Type: Integer

Minimum: 0

Update requires: No interruption