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# 将 `PutScalingPolicy` 与 CLI 配合使用
<a name="application-auto-scaling_example_application-auto-scaling_PutScalingPolicy_section"></a>

以下代码示例演示如何使用 `PutScalingPolicy`。

------
#### [ CLI ]

**AWS CLI**  
**示例 1：应用具有预定义指标规范的目标跟踪扩展策略**  
以下 `put-scaling-policy` 示例将具有预定义指标规范的目标跟踪扩展策略应用于默认集群中名为 web-app 的 Amazon ECS 服务。该策略将服务的平均 CPU 利用率保持在 75%，横向扩展和横向缩减冷却时间为 60 秒。输出包含代表您创建的两个 CloudWatch 警报的 ARNs 和名称。  

```
aws application-autoscaling put-scaling-policy --service-namespace ecs \
--scalable-dimension ecs:service:DesiredCount \
--resource-id service/default/web-app \
--policy-name cpu75-target-tracking-scaling-policy --policy-type TargetTrackingScaling \
--target-tracking-scaling-policy-configuration file://config.json
```
此示例假设您在当前目录中有一个 config.json 文件，其中包含以下内容：  

```
{
     "TargetValue": 75.0,
     "PredefinedMetricSpecification": {
         "PredefinedMetricType": "ECSServiceAverageCPUUtilization"
     },
     "ScaleOutCooldown": 60,
    "ScaleInCooldown": 60
}
```
输出：  

```
{
    "PolicyARN": "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy:6d8972f3-efc8-437c-92d1-6270f29a66e7:resource/ecs/service/default/web-app:policyName/cpu75-target-tracking-scaling-policy",
    "Alarms": [
        {
            "AlarmARN": "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca",
            "AlarmName": "TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca"
        },
        {
            "AlarmARN": "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmLow-1b437334-d19b-4a63-a812-6c67aaf2910d",
            "AlarmName": "TargetTracking-service/default/web-app-AlarmLow-1b437334-d19b-4a63-a812-6c67aaf2910d"
        }
    ]
}
```
**示例 2：应用具有自定义指标规范的目标跟踪扩展策略**  
以下 `put-scaling-policy` 示例将具有自定义指标规范的目标跟踪扩展策略应用于默认集群中名为 web-app 的 Amazon ECS 服务。该策略将服务的平均利用率保持在 75%，横向扩展和横向缩减冷却时间为 60 秒。输出包含代表您创建的两个 CloudWatch 警报的 ARNs 和名称。  

```
aws application-autoscaling put-scaling-policy --service-namespace ecs \
--scalable-dimension ecs:service:DesiredCount \
--resource-id service/default/web-app \
--policy-name cms75-target-tracking-scaling-policy
--policy-type TargetTrackingScaling \
--target-tracking-scaling-policy-configuration file://config.json
```
此示例假设您在当前目录中有一个 config.json 文件，其中包含以下内容：  

```
{
    "TargetValue":75.0,
    "CustomizedMetricSpecification":{
        "MetricName":"MyUtilizationMetric",
        "Namespace":"MyNamespace",
        "Dimensions": [
            {
                "Name":"MyOptionalMetricDimensionName",
                "Value":"MyOptionalMetricDimensionValue"
            }
        ],
        "Statistic":"Average",
        "Unit":"Percent"
    },
    "ScaleOutCooldown": 60,
    "ScaleInCooldown": 60
}
```
输出：  

```
{
    "PolicyARN": "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy: 8784a896-b2ba-47a1-b08c-27301cc499a1:resource/ecs/service/default/web-app:policyName/cms75-target-tracking-scaling-policy",
    "Alarms": [
        {
            "AlarmARN": "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmHigh-9bc77b56-0571-4276-ba0f-d4178882e0a0",
            "AlarmName": "TargetTracking-service/default/web-app-AlarmHigh-9bc77b56-0571-4276-ba0f-d4178882e0a0"
        },
        {
            "AlarmARN": "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmLow-9b6ad934-6d37-438e-9e05-02836ddcbdc4",
            "AlarmName": "TargetTracking-service/default/web-app-AlarmLow-9b6ad934-6d37-438e-9e05-02836ddcbdc4"
        }
    ]
}
```
**示例 3：为仅向外扩展应用目标跟踪扩展策略**  
以下 `put-scaling-policy` 示例将目标跟踪扩展策略应用于默认集群中名为 `web-app` 的 Amazon ECS 服务。当来自应用程序负载均衡器的 `RequestCountPerTarget` 指标超过阈值时，该策略用于横向扩展 ECS 服务。输出包含代表您创建的 CloudWatch 警报的 ARN 和名称。  

```
aws application-autoscaling put-scaling-policy \
    --service-namespace ecs \
    --scalable-dimension ecs:service:DesiredCount \
    --resource-id service/default/web-app \
    --policy-name alb-scale-out-target-tracking-scaling-policy \
    --policy-type TargetTrackingScaling \
    --target-tracking-scaling-policy-configuration file://config.json
```
`config.json` 的内容：  

```
{
     "TargetValue": 1000.0,
     "PredefinedMetricSpecification": {
         "PredefinedMetricType": "ALBRequestCountPerTarget",
         "ResourceLabel": "app/EC2Co-EcsEl-1TKLTMITMM0EO/f37c06a68c1748aa/targetgroup/EC2Co-Defau-LDNM7Q3ZH1ZN/6d4ea56ca2d6a18d"
     },
     "ScaleOutCooldown": 60,
    "ScaleInCooldown": 60,
    "DisableScaleIn": true
}
```
输出：  

```
{
    "PolicyARN": "arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:6d8972f3-efc8-437c-92d1-6270f29a66e7:resource/ecs/service/default/web-app:policyName/alb-scale-out-target-tracking-scaling-policy",
    "Alarms": [
        {
            "AlarmName": "TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca",
            "AlarmARN": "arn:aws:cloudwatch:us-west-2:123456789012:alarm:TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca"
        }
    ]
}
```
有关更多信息，请参阅《AWS Application Auto Scaling 用户指南》**中的 [Application Auto Scaling 的目标跟踪扩展策略](https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-target-tracking.html)。  
+  有关 API 的详细信息，请参阅*AWS CLI 命令参考[PutScalingPolicy](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/put-scaling-policy.html)*中的。

------
#### [ PowerShell ]

**适用于 PowerShell V4 的工具**  
**示例 1：此 cmdlet 为 Application Auto Scaling 可扩展目标创建或更新策略。每个可扩展目标均由服务命名空间、资源 ID 和可扩展维度标识。**  

```
Set-AASScalingPolicy -ServiceNamespace AppStream -PolicyName ASFleetScaleInPolicy -PolicyType StepScaling  -ResourceId fleet/MyFleet -ScalableDimension appstream:fleet:DesiredCapacity -StepScalingPolicyConfiguration_AdjustmentType ChangeInCapacity -StepScalingPolicyConfiguration_Cooldown 360 -StepScalingPolicyConfiguration_MetricAggregationType Average -StepScalingPolicyConfiguration_StepAdjustments @{ScalingAdjustment = -1; MetricIntervalUpperBound = 0}
```
**输出**：  

```
Alarms    PolicyARN
------    ---------
{}        arn:aws:autoscaling:us-west-2:012345678912:scalingPolicy:4897ca24-3caa-4bf1-8484-851a089b243c:resource/appstream/fleet/MyFleet:policyName/ASFleetScaleInPolicy
```
+  有关 API 的详细信息，请参阅 *AWS Tools for PowerShell Cmdlet 参考 (V* 4) [PutScalingPolicy](https://docs.aws.amazon.com/powershell/v4/reference)中的。

**适用于 PowerShell V5 的工具**  
**示例 1：此 cmdlet 为 Application Auto Scaling 可扩展目标创建或更新策略。每个可扩展目标均由服务命名空间、资源 ID 和可扩展维度标识。**  

```
Set-AASScalingPolicy -ServiceNamespace AppStream -PolicyName ASFleetScaleInPolicy -PolicyType StepScaling  -ResourceId fleet/MyFleet -ScalableDimension appstream:fleet:DesiredCapacity -StepScalingPolicyConfiguration_AdjustmentType ChangeInCapacity -StepScalingPolicyConfiguration_Cooldown 360 -StepScalingPolicyConfiguration_MetricAggregationType Average -StepScalingPolicyConfiguration_StepAdjustments @{ScalingAdjustment = -1; MetricIntervalUpperBound = 0}
```
**输出**：  

```
Alarms    PolicyARN
------    ---------
{}        arn:aws:autoscaling:us-west-2:012345678912:scalingPolicy:4897ca24-3caa-4bf1-8484-851a089b243c:resource/appstream/fleet/MyFleet:policyName/ASFleetScaleInPolicy
```
+  有关 API 的详细信息，请参阅 *AWS Tools for PowerShell Cmdlet 参考 (V* 5) [PutScalingPolicy](https://docs.aws.amazon.com/powershell/v5/reference)中的。

------