本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 使用 描述 Application Auto Scaling 的步驟擴展政策 AWS CLI
<a name="describe-step-scaling-policy"></a>

您可以使用 [describe-scaling-policies](https://docs.aws.amazon.com/cli/latest/reference/application-autoscaling/describe-scaling-policies.html) 命令來描述服務命名空間的所有擴展政策。下列範例說明所有 Amazon ECS 服務的所有擴展政策。若要針對特定 Amazon ECS 服務列出它們，請僅新增 `--resource-id`選項。

```
aws application-autoscaling describe-scaling-policies --service-namespace ecs
```

使用 `--query` 參數可將結果篩選為僅包含步驟擴展政策。如需 `query` 語法的詳細資訊，請參閱《AWS Command Line Interface 使用者指南》**中的[從 AWS CLI控制命令輸出](https://docs.aws.amazon.com/cli/latest/userguide/cli-usage-output.html)。

**Linux、macOS 或 Unix**

```
aws application-autoscaling describe-scaling-policies --service-namespace ecs \
  --query 'ScalingPolicies[?PolicyType==`StepScaling`]'
```

**Windows**

```
aws application-autoscaling describe-scaling-policies --service-namespace ecs ^
  --query "ScalingPolicies[?PolicyType==`StepScaling`]"
```

**Output**  
以下為範例輸出。

```
[
    {
        "PolicyARN": "PolicyARN",
        "StepScalingPolicyConfiguration": {
            "MetricAggregationType": "Average",
            "Cooldown": 60,
            "StepAdjustments": [
                {
                    "MetricIntervalLowerBound": 0.0,
                    "MetricIntervalUpperBound": 15.0,
                    "ScalingAdjustment": 1
                },
                {
                    "MetricIntervalLowerBound": 15.0,
                    "MetricIntervalUpperBound": 25.0,
                    "ScalingAdjustment": 2
                },
                {
                    "MetricIntervalLowerBound": 25.0,
                    "ScalingAdjustment": 3
                }
            ],
            "AdjustmentType": "ChangeInCapacity"
        },
        "PolicyType": "StepScaling",
        "ResourceId": "service/my-cluster/my-service",
        "ServiceNamespace": "ecs",
        "Alarms": [
            {
                "AlarmName": "Step-Scaling-AlarmHigh-ECS:service/my-cluster/my-service",
                "AlarmARN": "arn:aws:cloudwatch:region:012345678910:alarm:Step-Scaling-AlarmHigh-ECS:service/my-cluster/my-service"
            }
        ],
        "PolicyName": "my-step-scaling-policy",
        "ScalableDimension": "ecs:service:DesiredCount",
        "CreationTime": 1515024099.901
    }
]
```