---
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#  with the License. A copy of the License is located at
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AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31

Description: |
  CDF Asset Library Service Scaling
  =================================
  This template provides an example of how to apply auto-scaling to the Asset Library lambda.

Parameters:
  MinCapacity:
    Description: The minimum value to scale to in response to a scale-in event.
    Type: Number
    Default: 0
  MaxCapacity:
    Description: The maximum value to scale to in response to a scale-out event.
    Type: Number
    Default: 100
  TargetUtilization:
    Description: Target utilization (0.0 to 1.0).
    Type: Number
    Default: 0.7
  LambdaName:
    Description: Lambda Name to apply autoscaling.
    Type: String
    MinLength: 1
  LambdaAlias:
    Description: Lambda alias to apply autoscaling.
    Type: String
    Default: live
    MinLength: 1

Resources:
  ScalableTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MaxCapacity: !Ref MaxCapacity
      MinCapacity: !Ref MinCapacity
      ResourceId: !Sub 'function:${LambdaName}:${LambdaAlias}'
      RoleARN: !Sub arn:aws:iam::${AWS::AccountId}:role/aws-service-role/lambda.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_Lambda
      ScalableDimension: lambda:function:ProvisionedConcurrency
      ServiceNamespace: lambda

  TargetTrackingScalingPolicy:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: utilization
      PolicyType: TargetTrackingScaling
      ScalingTargetId: !Ref ScalableTarget
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: !Ref TargetUtilization
        PredefinedMetricSpecification:
          PredefinedMetricType: LambdaProvisionedConcurrencyUtilization