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# CloudFormation 用于创建扩展策略
<a name="endpoint-scaling-cloudformation"></a>

下面的示例显示了如何使用 CloudFormation在端点上配置模型自动扩缩。

```
  Endpoint:
    Type: "AWS::SageMaker::Endpoint"
    Properties:
      EndpointName: yourEndpointName
      EndpointConfigName: yourEndpointConfigName

  ScalingTarget:
    Type: "AWS::ApplicationAutoScaling::ScalableTarget"
    Properties:
      MaxCapacity: 10
      MinCapacity: 2
      ResourceId: endpoint/my-endpoint/variant/my-variant
      RoleARN: arn
      ScalableDimension: sagemaker:variant:DesiredInstanceCount
      ServiceNamespace: sagemaker

  ScalingPolicy:
    Type: "AWS::ApplicationAutoScaling::ScalingPolicy"
    Properties:
      PolicyName: my-scaling-policy
      PolicyType: TargetTrackingScaling
      ScalingTargetId:
        Ref: ScalingTarget
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: 70.0
        ScaleInCooldown: 600
        ScaleOutCooldown: 30
        PredefinedMetricSpecification:
          PredefinedMetricType: SageMakerVariantInvocationsPerInstance
```

如需了解更多信息，请参阅[《应用程序自动扩缩用户指南》](https://docs.aws.amazon.com/autoscaling/application/userguide/creating-resources-with-cloudformation.html)中的*使用 AWS CloudFormation创建应用程序自动扩缩资源*。