文档 AWS SDK 示例 GitHub 存储库中还有更多 [S AWS DK 示例](https://github.com/awsdocs/aws-doc-sdk-examples)。

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# 将 `DescribePolicies` 与 CLI 配合使用
<a name="auto-scaling_example_auto-scaling_DescribePolicies_section"></a>

以下代码示例演示如何使用 `DescribePolicies`。

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

**AWS CLI**  
**示例 1：描述指定组的扩展策略**  
此示例描述指定自动扩缩组的扩展策略。  

```
aws autoscaling describe-policies \
    --auto-scaling-group-name my-asg
```
输出：  

```
{
    "ScalingPolicies": [
        {
            "AutoScalingGroupName": "my-asg",
            "PolicyName": "alb1000-target-tracking-scaling-policy",
            "PolicyARN": "arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:3065d9c8-9969-4bec-bb6a-3fbe5550fde6:autoScalingGroupName/my-asg:policyName/alb1000-target-tracking-scaling-policy",
            "PolicyType": "TargetTrackingScaling",
            "StepAdjustments": [],
            "Alarms": [
                {
                    "AlarmName": "TargetTracking-my-asg-AlarmHigh-924887a9-12d7-4e01-8686-6f844d13a196",
                    "AlarmARN": "arn:aws:cloudwatch:us-west-2:123456789012:alarm:TargetTracking-my-asg-AlarmHigh-924887a9-12d7-4e01-8686-6f844d13a196"
                },
                {
                    "AlarmName": "TargetTracking-my-asg-AlarmLow-f96f899d-b8e7-4d09-a010-c1aaa35da296",
                    "AlarmARN": "arn:aws:cloudwatch:us-west-2:123456789012:alarm:TargetTracking-my-asg-AlarmLow-f96f899d-b8e7-4d09-a010-c1aaa35da296"
                }
            ],
            "TargetTrackingConfiguration": {
                "PredefinedMetricSpecification": {
                    "PredefinedMetricType": "ALBRequestCountPerTarget",
                    "ResourceLabel": "app/my-alb/778d41231b141a0f/targetgroup/my-alb-target-group/943f017f100becff"
                },
                "TargetValue": 1000.0,
                "DisableScaleIn": false
            },
            "Enabled": true
        },
        {
            "AutoScalingGroupName": "my-asg",
            "PolicyName": "cpu40-target-tracking-scaling-policy",
            "PolicyARN": "arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:5fd26f71-39d4-4690-82a9-b8515c45cdde:autoScalingGroupName/my-asg:policyName/cpu40-target-tracking-scaling-policy",
            "PolicyType": "TargetTrackingScaling",
            "StepAdjustments": [],
            "Alarms": [
                {
                    "AlarmName": "TargetTracking-my-asg-AlarmHigh-139f9789-37b9-42ad-bea5-b5b147d7f473",
                    "AlarmARN": "arn:aws:cloudwatch:us-west-2:123456789012:alarm:TargetTracking-my-asg-AlarmHigh-139f9789-37b9-42ad-bea5-b5b147d7f473"
                },
                {
                    "AlarmName": "TargetTracking-my-asg-AlarmLow-bd681c67-fc18-4c56-8468-fb8e413009c9",
                    "AlarmARN": "arn:aws:cloudwatch:us-west-2:123456789012:alarm:TargetTracking-my-asg-AlarmLow-bd681c67-fc18-4c56-8468-fb8e413009c9"
                }
            ],
            "TargetTrackingConfiguration": {
                "PredefinedMetricSpecification": {
                    "PredefinedMetricType": "ASGAverageCPUUtilization"
                },
                "TargetValue": 40.0,
                "DisableScaleIn": false
            },
            "Enabled": true
        }
    ]
}
```
有关更多信息，请参阅《Amazon EC2 Auto Scaling 用户指南》**中的[动态扩展](https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-scale-based-on-demand.html)。  
**示例 2：描述指定名称的扩展策略**  
要返回特定的扩展策略，请使用 `--policy-names` 选项。  

```
aws autoscaling describe-policies \
    --auto-scaling-group-name my-asg \
    --policy-names cpu40-target-tracking-scaling-policy
```
有关输出示例，请参阅示例 1。  
有关更多信息，请参阅《Amazon EC2 Auto Scaling 用户指南》**中的[动态扩展](https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-scale-based-on-demand.html)。  
**示例 3：描述多种扩展策略**  
要返回特定数量的策略，请使用 `--max-items` 选项。  

```
aws autoscaling describe-policies \
    --auto-scaling-group-name my-asg \
    --max-items 1
```
有关输出示例，请参阅示例 1。  
如果输出包含 `NextToken` 字段，则请在后续调用中使用此字段的值和 `--starting-token` 选项获取其他策略。  

```
aws autoscaling describe-policies --auto-scaling-group-name my-asg --starting-token Z3M3LMPEXAMPLE
```
有关更多信息，请参阅《Amazon EC2 Auto Scaling 用户指南》**中的[动态扩展](https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-scale-based-on-demand.html)。  
+  有关 API 的详细信息，请参阅*AWS CLI 命令参考[DescribePolicies](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/autoscaling/describe-policies.html)*中的。

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

**适用于 PowerShell V4 的工具**  
**示例 1：此示例描述指定自动扩缩组的所有策略。**  

```
Get-ASPolicy -AutoScalingGroupName my-asg
```
**输出**：  

```
AdjustmentType          : ChangeInCapacity
Alarms                  : {}
AutoScalingGroupName    : my-asg
Cooldown                : 0
EstimatedInstanceWarmup : 0
MetricAggregationType   :
MinAdjustmentMagnitude  : 0
MinAdjustmentStep       : 0
PolicyARN               : arn:aws:auto-scaling:us-west-2:123456789012:scalingPolicy:aa3836ab-5462-42c7-adab-e1d769fc24ef
                          :autoScalingGroupName/my-asg:policyName/myScaleInPolicy
PolicyName              : myScaleInPolicy
PolicyType              : SimpleScaling
ScalingAdjustment       : -1
StepAdjustments         : {}
```
**示例 2：此示例描述指定自动扩缩组的指定策略。**  

```
Get-ASPolicy -AutoScalingGroupName my-asg -PolicyName @("myScaleOutPolicy", "myScaleInPolicy")
```
**示例 3：此示例描述所有自动扩缩组的所有策略。**  

```
Get-ASPolicy
```
+  有关 API 的详细信息，请参阅 *AWS Tools for PowerShell Cmdlet 参考 (V* 4) [DescribePolicies](https://docs.aws.amazon.com/powershell/v4/reference)中的。

**适用于 PowerShell V5 的工具**  
**示例 1：此示例描述指定自动扩缩组的所有策略。**  

```
Get-ASPolicy -AutoScalingGroupName my-asg
```
**输出**：  

```
AdjustmentType          : ChangeInCapacity
Alarms                  : {}
AutoScalingGroupName    : my-asg
Cooldown                : 0
EstimatedInstanceWarmup : 0
MetricAggregationType   :
MinAdjustmentMagnitude  : 0
MinAdjustmentStep       : 0
PolicyARN               : arn:aws:auto-scaling:us-west-2:123456789012:scalingPolicy:aa3836ab-5462-42c7-adab-e1d769fc24ef
                          :autoScalingGroupName/my-asg:policyName/myScaleInPolicy
PolicyName              : myScaleInPolicy
PolicyType              : SimpleScaling
ScalingAdjustment       : -1
StepAdjustments         : {}
```
**示例 2：此示例描述指定自动扩缩组的指定策略。**  

```
Get-ASPolicy -AutoScalingGroupName my-asg -PolicyName @("myScaleOutPolicy", "myScaleInPolicy")
```
**示例 3：此示例描述所有自动扩缩组的所有策略。**  

```
Get-ASPolicy
```
+  有关 API 的详细信息，请参阅 *AWS Tools for PowerShell Cmdlet 参考 (V* 5) [DescribePolicies](https://docs.aws.amazon.com/powershell/v5/reference)中的。

------