# 使用 AWS CLI 的 Application Auto Scaling 示例
以下代码示例演示如何通过将 AWS Command Line Interface与 Application Auto Scaling 结合使用，来执行操作和实现常见场景。
*操作是大型程序的代码摘录*，必须在上下文中运行。您可以通过操作了解如何调用单个服务函数，还可以通过函数相关场景的上下文查看操作。
每个示例都包含一个指向完整源代码的链接，您可以从中找到有关如何在上下文中设置和运行代码的说明。
**Topics**
+ [操作](#actions)
## 操作
### `delete-scaling-policy`
以下代码示例演示了如何使用 `delete-scaling-policy`。
**AWS CLI**
**删除扩展策略**
此示例删除在默认集群中运行的 Amazon ECS 服务 web-app 的扩展策略。
命令:
```
aws application-autoscaling delete-scaling-policy --policy-name web-app-cpu-lt-25 --scalable-dimension ecs:service:DesiredCount --resource-id service/default/web-app --service-namespace ecs
```
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [DeleteScalingPolicy](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/delete-scaling-policy.html)。
### `delete-scheduled-action`
以下代码示例演示了如何使用 `delete-scheduled-action`。
**AWS CLI**
**删除计划操作**
以下 `delete-scheduled-action` 示例从指定的 Amazon AppStream 2.0 实例集中删除指定的计划操作：
```
aws application-autoscaling delete-scheduled-action \
--service-namespace appstream \
--scalable-dimension appstream:fleet:DesiredCapacity \
--resource-id fleet/sample-fleet \
--scheduled-action-name my-recurring-action
```
此命令不生成任何输出。
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的[计划扩展](https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-scheduled-scaling.html)。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [DeleteScheduledAction](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/delete-scheduled-action.html)。
### `deregister-scalable-target`
以下代码示例演示了如何使用 `deregister-scalable-target`。
**AWS CLI**
**取消注册可扩展目标**
此示例取消注册在默认集群中运行的 Amazon ECS 服务（名为 web-app）的可扩展目标。
命令:
```
aws application-autoscaling deregister-scalable-target --service-namespace ecs --scalable-dimension ecs:service:DesiredCount --resource-id service/default/web-app
```
此示例取消注册自定义资源的可扩展目标。custom-resource-id.txt 文件包含一个标识资源 ID 的字符串，对于自定义资源，该 ID 是通过 Amazon API Gateway 端点指向自定义资源的路径。
命令:
```
aws application-autoscaling deregister-scalable-target --service-namespace custom-resource --scalable-dimension custom-resource:ResourceType:Property --resource-id file://~/custom-resource-id.txt
```
custom-resource-id.txt 文件的内容：
```
https://example.execute-api.us-west-2.amazonaws.com/prod/scalableTargetDimensions/1-23456789
```
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [DeregisterScalableTarget](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/deregister-scalable-target.html)。
### `describe-scalable-targets`
以下代码示例演示了如何使用 `describe-scalable-targets`。
**AWS CLI**
**描述可扩展目标**
以下 `describe-scalable-targets` 示例描述 `ecs` 服务命名空间的可扩展目标。
```
aws application-autoscaling describe-scalable-targets \
--service-namespace ecs
```
输出：
```
{
"ScalableTargets": [
{
"ServiceNamespace": "ecs",
"ScalableDimension": "ecs:service:DesiredCount",
"ResourceId": "service/default/web-app",
"MinCapacity": 1,
"MaxCapacity": 10,
"RoleARN": "arn:aws:iam::123456789012:role/aws-service-role/ecs.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ECSService",
"CreationTime": 1462558906.199,
"SuspendedState": {
"DynamicScalingOutSuspended": false,
"ScheduledScalingSuspended": false,
"DynamicScalingInSuspended": false
},
"ScalableTargetARN": "arn:aws:application-autoscaling:us-west-2:123456789012:scalable-target/1234abcd56ab78cd901ef1234567890ab123"
}
]
}
```
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的[可与 Application Auto Scaling 一起使用的 AWS 服务](https://docs.aws.amazon.com/autoscaling/application/userguide/integrated-services-list.html)。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [DescribeScalableTargets](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/describe-scalable-targets.html)。
### `describe-scaling-activities`
以下代码示例演示了如何使用 `describe-scaling-activities`。
**AWS CLI**
**示例 1：描述指定 Amazon ECS 服务的扩展活动**
以下 `describe-scaling-activities` 示例描述在 `default` 集群中运行的 Amazon ECS 服务（名为 `web-app`）的扩展活动。输出显示了由扩展策略启动的扩展活动。
```
aws application-autoscaling describe-scaling-activities \
--service-namespace ecs \
--resource-id service/default/web-app
```
输出：
```
{
"ScalingActivities": [
{
"ScalableDimension": "ecs:service:DesiredCount",
"Description": "Setting desired count to 1.",
"ResourceId": "service/default/web-app",
"ActivityId": "e6c5f7d1-dbbb-4a3f-89b2-51f33e766399",
"StartTime": 1462575838.171,
"ServiceNamespace": "ecs",
"EndTime": 1462575872.111,
"Cause": "monitor alarm web-app-cpu-lt-25 in state ALARM triggered policy web-app-cpu-lt-25",
"StatusMessage": "Successfully set desired count to 1. Change successfully fulfilled by ecs.",
"StatusCode": "Successful"
}
]
}
```
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的 [Application Auto Scaling 的扩展活动](https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-scaling-activities.html)。
**示例 2：描述指定 DynamoDB 表的扩展活动**
以下 `describe-scaling-activities` 示例描述名为 `TestTable` 的 DynamoDB 表的扩展活动。输出显示了由两个不同的计划操作启动的扩展活动。
```
aws application-autoscaling describe-scaling-activities \
--service-namespace dynamodb \
--resource-id table/TestTable
```
输出：
```
{
"ScalingActivities": [
{
"ScalableDimension": "dynamodb:table:WriteCapacityUnits",
"Description": "Setting write capacity units to 10.",
"ResourceId": "table/my-table",
"ActivityId": "4d1308c0-bbcf-4514-a673-b0220ae38547",
"StartTime": 1561574415.086,
"ServiceNamespace": "dynamodb",
"EndTime": 1561574449.51,
"Cause": "maximum capacity was set to 10",
"StatusMessage": "Successfully set write capacity units to 10. Change successfully fulfilled by dynamodb.",
"StatusCode": "Successful"
},
{
"ScalableDimension": "dynamodb:table:WriteCapacityUnits",
"Description": "Setting min capacity to 5 and max capacity to 10",
"ResourceId": "table/my-table",
"ActivityId": "f2b7847b-721d-4e01-8ef0-0c8d3bacc1c7",
"StartTime": 1561574414.644,
"ServiceNamespace": "dynamodb",
"Cause": "scheduled action name my-second-scheduled-action was triggered",
"StatusMessage": "Successfully set min capacity to 5 and max capacity to 10",
"StatusCode": "Successful"
},
{
"ScalableDimension": "dynamodb:table:WriteCapacityUnits",
"Description": "Setting write capacity units to 15.",
"ResourceId": "table/my-table",
"ActivityId": "d8ea4de6-9eaa-499f-b466-2cc5e681ba8b",
"StartTime": 1561574108.904,
"ServiceNamespace": "dynamodb",
"EndTime": 1561574140.255,
"Cause": "minimum capacity was set to 15",
"StatusMessage": "Successfully set write capacity units to 15. Change successfully fulfilled by dynamodb.",
"StatusCode": "Successful"
},
{
"ScalableDimension": "dynamodb:table:WriteCapacityUnits",
"Description": "Setting min capacity to 15 and max capacity to 20",
"ResourceId": "table/my-table",
"ActivityId": "3250fd06-6940-4e8e-bb1f-d494db7554d2",
"StartTime": 1561574108.512,
"ServiceNamespace": "dynamodb",
"Cause": "scheduled action name my-first-scheduled-action was triggered",
"StatusMessage": "Successfully set min capacity to 15 and max capacity to 20",
"StatusCode": "Successful"
}
]
}
```
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的 [Application Auto Scaling 的扩展活动](https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-scaling-activities.html)。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [DescribeScalingActivities](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/describe-scaling-activities.html)。
### `describe-scaling-policies`
以下代码示例演示了如何使用 `describe-scaling-policies`。
**AWS CLI**
**描述扩展策略**
此示例命令描述 ecs 服务命名空间的扩展策略。
命令:
```
aws application-autoscaling describe-scaling-policies --service-namespace ecs
```
输出：
```
{
"ScalingPolicies": [
{
"PolicyName": "web-app-cpu-gt-75",
"ScalableDimension": "ecs:service:DesiredCount",
"ResourceId": "service/default/web-app",
"CreationTime": 1462561899.23,
"StepScalingPolicyConfiguration": {
"Cooldown": 60,
"StepAdjustments": [
{
"ScalingAdjustment": 200,
"MetricIntervalLowerBound": 0.0
}
],
"AdjustmentType": "PercentChangeInCapacity"
},
"PolicyARN": "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy:6d8972f3-efc8-437c-92d1-6270f29a66e7:resource/ecs/service/default/web-app:policyName/web-app-cpu-gt-75",
"PolicyType": "StepScaling",
"Alarms": [
{
"AlarmName": "web-app-cpu-gt-75",
"AlarmARN": "arn:aws:cloudwatch:us-west-2:012345678910:alarm:web-app-cpu-gt-75"
}
],
"ServiceNamespace": "ecs"
},
{
"PolicyName": "web-app-cpu-lt-25",
"ScalableDimension": "ecs:service:DesiredCount",
"ResourceId": "service/default/web-app",
"CreationTime": 1462562575.099,
"StepScalingPolicyConfiguration": {
"Cooldown": 1,
"StepAdjustments": [
{
"ScalingAdjustment": -50,
"MetricIntervalUpperBound": 0.0
}
],
"AdjustmentType": "PercentChangeInCapacity"
},
"PolicyARN": "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy:6d8972f3-efc8-437c-92d1-6270f29a66e7:resource/ecs/service/default/web-app:policyName/web-app-cpu-lt-25",
"PolicyType": "StepScaling",
"Alarms": [
{
"AlarmName": "web-app-cpu-lt-25",
"AlarmARN": "arn:aws:cloudwatch:us-west-2:012345678910:alarm:web-app-cpu-lt-25"
}
],
"ServiceNamespace": "ecs"
}
]
}
```
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [DescribeScalingPolicies](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/describe-scaling-policies.html)。
### `describe-scheduled-actions`
以下代码示例演示了如何使用 `describe-scheduled-actions`。
**AWS CLI**
**描述计划的操作**
以下 `describe-scheduled-actions` 示例显示指定服务命名空间的计划操作的详细信息：
```
aws application-autoscaling describe-scheduled-actions \
--service-namespace dynamodb
```
输出：
```
{
"ScheduledActions": [
{
"ScalableDimension": "dynamodb:table:WriteCapacityUnits",
"Schedule": "at(2019-05-20T18:35:00)",
"ResourceId": "table/my-table",
"CreationTime": 1561571888.361,
"ScheduledActionARN": "arn:aws:autoscaling:us-west-2:123456789012:scheduledAction:2d36aa3b-cdf9-4565-b290-81db519b227d:resource/dynamodb/table/my-table:scheduledActionName/my-first-scheduled-action",
"ScalableTargetAction": {
"MinCapacity": 15,
"MaxCapacity": 20
},
"ScheduledActionName": "my-first-scheduled-action",
"ServiceNamespace": "dynamodb"
},
{
"ScalableDimension": "dynamodb:table:WriteCapacityUnits",
"Schedule": "at(2019-05-20T18:40:00)",
"ResourceId": "table/my-table",
"CreationTime": 1561571946.021,
"ScheduledActionARN": "arn:aws:autoscaling:us-west-2:123456789012:scheduledAction:2d36aa3b-cdf9-4565-b290-81db519b227d:resource/dynamodb/table/my-table:scheduledActionName/my-second-scheduled-action",
"ScalableTargetAction": {
"MinCapacity": 5,
"MaxCapacity": 10
},
"ScheduledActionName": "my-second-scheduled-action",
"ServiceNamespace": "dynamodb"
}
]
}
```
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的[计划扩展](https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-scheduled-scaling.html)。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [DescribeScheduledActions](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/describe-scheduled-actions.html)。
### `list-tags-for-resource`
以下代码示例演示了如何使用 `list-tags-for-resource`。
**AWS CLI**
**列出可扩展目标的标签**
以下 `list-tags-for-resource` 示例列出附加到由其 ARN 指定的可扩展目标的标签键名称和值。
```
aws application-autoscaling list-tags-for-resource \
--resource-arn arn:aws:application-autoscaling:us-west-2:123456789012:scalable-target/1234abcd56ab78cd901ef1234567890ab123
```
输出：
```
{
"Tags": {
"environment": "production"
}
}
```
有关更多信息，请参阅 [Application Auto Scaling 用户指南](https://docs.aws.amazon.com/autoscaling/application/userguide/resource-tagging-support.html)中的 *Application Auto Scaling 的标签支持*。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [ListTagsForResource](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/list-tags-for-resource.html)。
### `put-scaling-policy`
以下代码示例演示了如何使用 `put-scaling-policy`。
**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 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 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 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 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
```
的内容`config.json`：
```
{
"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 详细信息，请参阅《AWS CLI 命令参考》**中的 [PutScalingPolicy](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/put-scaling-policy.html)。
### `put-scheduled-action`
以下代码示例演示了如何使用 `put-scheduled-action`。
**AWS CLI**
**向 DynamoDB 表添加计划操作**
此示例向名为 TestTable 的 DynamoDB 表添加一个计划操作，以便按周期性计划进行横向扩展。按照指定的计划（UTC 时间每天中午 12:15），如果当前容量低于为 MinCapacity 指定的值，则 Application Auto Scaling 将横向扩展到由 MinCapacity 指定的值。
命令:
```
aws application-autoscaling put-scheduled-action --service-namespace dynamodb --scheduled-action-name my-recurring-action --schedule "cron(15 12 * * ? *)" --resource-id table/TestTable --scalable-dimension dynamodb:table:WriteCapacityUnits --scalable-target-action MinCapacity=6
```
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的“计划扩展”。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [PutScheduledAction](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/put-scheduled-action.html)。
### `register-scalable-target`
以下代码示例演示了如何使用 `register-scalable-target`。
**AWS CLI**
**示例 1：将 ECS 服务注册为可扩展目标**
以下 `register-scalable-target` 示例向 Application Auto Scaling 注册 Amazon ECS 服务。它还向可扩展目标添加一个带有键名称 `environment` 和值 `production` 的标签。
```
aws application-autoscaling register-scalable-target \
--service-namespace ecs \
--scalable-dimension ecs:service:DesiredCount \
--resource-id service/default/web-app \
--min-capacity 1 --max-capacity 10 \
--tags environment=production
```
输出：
```
{
"ScalableTargetARN": "arn:aws:application-autoscaling:us-west-2:123456789012:scalable-target/1234abcd56ab78cd901ef1234567890ab123"
}
```
有关其它 AWS 服务和自定义资源的示例，请参阅《Application Auto Scaling 用户指南》**中的[可与 Application Auto Scaling 结合使用的 AWS 服务](https://docs.aws.amazon.com/autoscaling/application/userguide/integrated-services-list.html)中的主题。
**示例 2：暂停可扩展目标的扩展活动**
以下 `register-scalable-target` 示例暂停现有可扩展目标的扩展活动。
```
aws application-autoscaling register-scalable-target \
--service-namespace dynamodb \
--scalable-dimension dynamodb:table:ReadCapacityUnits \
--resource-id table/my-table \
--suspended-state DynamicScalingInSuspended=true,DynamicScalingOutSuspended=true,ScheduledScalingSuspended=true
```
输出：
```
{
"ScalableTargetARN": "arn:aws:application-autoscaling:us-west-2:123456789012:scalable-target/1234abcd56ab78cd901ef1234567890ab123"
}
```
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的[暂停和恢复 Application Auto Scaling 扩展](https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-suspend-resume-scaling.html)。
**示例 3：恢复可扩展目标的扩展活动**
以下 `register-scalable-target` 示例恢复现有可扩展目标的扩展活动。
```
aws application-autoscaling register-scalable-target \
--service-namespace dynamodb \
--scalable-dimension dynamodb:table:ReadCapacityUnits \
--resource-id table/my-table \
--suspended-state DynamicScalingInSuspended=false,DynamicScalingOutSuspended=false,ScheduledScalingSuspended=false
```
输出：
```
{
"ScalableTargetARN": "arn:aws:application-autoscaling:us-west-2:123456789012:scalable-target/1234abcd56ab78cd901ef1234567890ab123"
}
```
有关更多信息，请参阅《Application Auto Scaling 用户指南》**中的[暂停和恢复 Application Auto Scaling 扩展](https://docs.aws.amazon.com/autoscaling/application/userguide/application-auto-scaling-suspend-resume-scaling.html)。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [RegisterScalableTarget](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/register-scalable-target.html)。
### `tag-resource`
以下代码示例演示了如何使用 `tag-resource`。
**AWS CLI**
**向可扩展目标添加标签**
以下 `tag-resource` 示例将带有键名称 `environment` 和值 `production` 的标签添加到由其 ARN 指定的可扩展目标。
```
aws application-autoscaling tag-resource \
--resource-arn arn:aws:application-autoscaling:us-west-2:123456789012:scalable-target/1234abcd56ab78cd901ef1234567890ab123 \
--tags environment=production
```
此命令不生成任何输出。
有关更多信息，请参阅 [Application Auto Scaling 用户指南](https://docs.aws.amazon.com/autoscaling/application/userguide/resource-tagging-support.html)中的 *Application Auto Scaling 的标签支持*。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [TagResource](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/tag-resource.html)。
### `untag-resource`
以下代码示例演示了如何使用 `untag-resource`。
**AWS CLI**
**从可扩展目标中移除标签**
以下 `untag-resource` 示例从由其 ARN 指定的可扩展目标中移除带有键名称 `environment` 的标签对。
```
aws application-autoscaling untag-resource \
--resource-arn arn:aws:application-autoscaling:us-west-2:123456789012:scalable-target/1234abcd56ab78cd901ef1234567890ab123 \
--tag-keys "environment"
```
此命令不生成任何输出。
有关更多信息，请参阅 [Application Auto Scaling 用户指南](https://docs.aws.amazon.com/autoscaling/application/userguide/resource-tagging-support.html)中的 *Application Auto Scaling 的标签支持*。
+ 有关 API 详细信息，请参阅《AWS CLI 命令参考》**中的 [UntagResource](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/application-autoscaling/untag-resource.html)。