AWS::AutoScaling::ScalingPolicy

• Scale based on SQS queue length
• Scale horizontally the consumers
• Scaling the ASG can be based on the custom metric Queue Length (from CloudWatch)

Properties

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-scalingpolicy.html

Type: AWS::AutoScaling::ScalingPolicy
Properties:
  AdjustmentType: String
  AutoScalingGroupName: String
  Cooldown: String
  EstimatedInstanceWarmup: Integer
  MetricAggregationType: String
  MinAdjustmentMagnitude: Integer
  PolicyType: String
  PredictiveScalingConfiguration: PredictiveScalingConfiguration
  ScalingAdjustment: Integer
  StepAdjustments:
    - StepAdjustment
  TargetTrackingConfiguration: TargetTrackingConfiguration

PolicyType

• TargetTrackingScaling
• Based on a metric
• SQS queue
• E.g., CPUUtilization, RequestCountPerTarget, Average Network In / Out
• StepScaling
• Based on alarm from CloudWatch
• Simple Scaling (default)
• Based on alarm from CloudWatch
• PredictiveScaling
• Continuously forecast load and schedule scaling ahead

If multiple policies are reached at the same time, the one that scales more instances is triggered