applicationautoscaling: missing PredefinedMetric for Lambda provisioned concurrency

[pahud]

LambdaProvisionedConcurrencyUtilization is required but missing.

aws-cdk/packages/@aws-cdk/aws-applicationautoscaling/lib/target-tracking-scaling-policy.ts

Lines 165 to 177 in b47eccc

	export enum PredefinedMetric {
	DYNAMODB_READ_CAPACITY_UTILIZATION = 'DynamoDBReadCapacityUtilization',
	DYANMODB_WRITE_CAPACITY_UTILIZATION = 'DynamoDBWriteCapacityUtilization',
	ALB_REQUEST_COUNT_PER_TARGET = 'ALBRequestCountPerTarget',
	RDS_READER_AVERAGE_CPU_UTILIZATION = 'RDSReaderAverageCPUUtilization',
	RDS_READER_AVERAGE_DATABASE_CONNECTIONS = 'RDSReaderAverageDatabaseConnections',
	EC2_SPOT_FLEET_REQUEST_AVERAGE_CPU_UTILIZATION = 'EC2SpotFleetRequestAverageCPUUtilization',
	EC2_SPOT_FLEET_REQUEST_AVERAGE_NETWORK_IN = 'EC2SpotFleetRequestAverageNetworkIn',
	EC2_SPOT_FLEET_REQUEST_AVERAGE_NETWORK_OUT = 'EC2SpotFleetRequestAverageNetworkOut',
	SAGEMAKER_VARIANT_INVOCATIONS_PER_INSTANCE = 'SageMakerVariantInvocationsPerInstance',
	ECS_SERVICE_AVERAGE_CPU_UTILIZATION = 'ECSServiceAverageCPUUtilization',
	ECS_SERVICE_AVERAGE_MEMORY_UTILIZATION = 'ECSServiceAverageMemoryUtilization',
	}

Without this enum, we can't configure props for scaleToTrackMetric like this.

    target.scaleToTrackMetric('PceTracking', {
      targetValue: 1,
      predefinedMetric: applicationautoscaling.PredefinedMetric.LAMBDA_PROVISIONED_CONCURRENCY_UTILIZATION,
    })

Reproduction Steps

missing LAMBDA_PROVISIONED_CONCURRENCY_UTILIZATION in the following sample

    const target = new applicationautoscaling.ScalableTarget(this, 'ScalableTarget', {
      serviceNamespace: applicationautoscaling.ServiceNamespace.LAMBDA,
      maxCapacity: 100,
      minCapacity: 10,
      resourceId: `function:${handler.functionName}:${fnVer.version}`,
      scalableDimension: 'lambda:function:ProvisionedConcurrency',
    })

    target.scaleToTrackMetric('PceTracking', {
      targetValue: 1,
      predefinedMetric: applicationautoscaling.PredefinedMetric.LAMBDA_PROVISIONED_CONCURRENCY_UTILIZATION,
    })
  }

Error Log

Environment

• CLI Version : v1.25.0
• Framework Version:
• OS : Mac OS X
• Language : TypeScript

Other

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This is 🐛 Bug Report

[SomayaB]

Thanks for putting in a PR @pahud, much appreciated! 👍