本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

# 在中使用警报操作 CloudWatch
<a name="examples-cloudwatch-use-alarm-actions"></a>

使用 CloudWatch 警报操作，您可以创建执行自动停止、终止、重启或恢复 Amazon EC2 实例等操作的警报。

[创建警报时，可以使用[PutMetricAlarmRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-monitoring/html/class_aws_1_1_cloud_watch_1_1_model_1_1_put_metric_alarm_request.html)的`SetAlarmActions`功能将警报操作添加到警报中](examples-cloudwatch-create-alarms.md)。

## 先决条件
<a name="codeExamplePrereq"></a>

在开始之前，建议您先阅读[开始使用 适用于 C\+\+ 的 AWS SDK](getting-started.md)。

下载示例代码并按[代码示例入门](getting-started-code-examples.md)中所述构建解决方案。

要运行这些示例，您的代码用于发出请求的用户配置文件必须具有适当的权限 AWS （适用于服务和操作）。有关更多信息，请参阅[提供 AWS 凭证](credentials.md)。

## 启用警报操作
<a name="enable-alarm-actions"></a>

要为警报启用 CloudWatch 警报操作，请`EnableAlarmActions`使用[EnableAlarmActionsRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-monitoring/html/class_aws_1_1_cloud_watch_1_1_model_1_1_enable_alarm_actions_request.html)包含要启用其操作的一个或多个警报名称调用。 CloudWatchClient

 **包含** 

```
#include <aws/core/Aws.h>
#include <aws/monitoring/CloudWatchClient.h>
#include <aws/monitoring/model/EnableAlarmActionsRequest.h>
#include <aws/monitoring/model/PutMetricAlarmRequest.h>
#include <iostream>
```

 **代码** 

```
    Aws::CloudWatch::CloudWatchClient cw;
    Aws::CloudWatch::Model::PutMetricAlarmRequest request;
    request.SetAlarmName(alarm_name);
    request.SetComparisonOperator(
        Aws::CloudWatch::Model::ComparisonOperator::GreaterThanThreshold);
    request.SetEvaluationPeriods(1);
    request.SetMetricName("CPUUtilization");
    request.SetNamespace("AWS/EC2");
    request.SetPeriod(60);
    request.SetStatistic(Aws::CloudWatch::Model::Statistic::Average);
    request.SetThreshold(70.0);
    request.SetActionsEnabled(false);
    request.SetAlarmDescription("Alarm when server CPU exceeds 70%");
    request.SetUnit(Aws::CloudWatch::Model::StandardUnit::Seconds);
    request.AddAlarmActions(actionArn);

    Aws::CloudWatch::Model::Dimension dimension;
    dimension.SetName("InstanceId");
    dimension.SetValue(instanceId);
    request.AddDimensions(dimension);

    auto outcome = cw.PutMetricAlarm(request);
    if (!outcome.IsSuccess())
    {
        std::cout << "Failed to create CloudWatch alarm:" <<
            outcome.GetError().GetMessage() << std::endl;
        return;
    }

    Aws::CloudWatch::Model::EnableAlarmActionsRequest enable_request;
    enable_request.AddAlarmNames(alarm_name);

    auto enable_outcome = cw.EnableAlarmActions(enable_request);
    if (!enable_outcome.IsSuccess())
    {
        std::cout << "Failed to enable alarm actions:" <<
            enable_outcome.GetError().GetMessage() << std::endl;
        return;
    }

    std::cout << "Successfully created alarm " << alarm_name <<
        " and enabled actions on it." << std::endl;
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/cloudwatch/enable_alarm_actions.cpp)。

## 禁用警报操作
<a name="disable-alarm-actions"></a>

要禁用警报的 CloudWatch 警报操作，请`DisableAlarmActions`使用[DisableAlarmActionsRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-monitoring/html/class_aws_1_1_cloud_watch_1_1_model_1_1_disable_alarm_actions_request.html)包含要禁用其操作的一个或多个警报名称调用。 CloudWatchClient

 **包含** 

```
#include <aws/core/Aws.h>
#include <aws/monitoring/CloudWatchClient.h>
#include <aws/monitoring/model/DisableAlarmActionsRequest.h>
#include <iostream>
```

 **代码** 

```
        Aws::CloudWatch::CloudWatchClient cw;

        Aws::CloudWatch::Model::DisableAlarmActionsRequest disableAlarmActionsRequest;
        disableAlarmActionsRequest.AddAlarmNames(alarm_name);

        auto disableAlarmActionsOutcome = cw.DisableAlarmActions(disableAlarmActionsRequest);
        if (!disableAlarmActionsOutcome.IsSuccess())
        {
            std::cout << "Failed to disable actions for alarm " << alarm_name <<
                ": " << disableAlarmActionsOutcome.GetError().GetMessage() <<
                std::endl;
        }
        else
        {
            std::cout << "Successfully disabled actions for alarm " <<
                alarm_name << std::endl;
        }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/cloudwatch/disable_alarm_actions.cpp)。

## 更多信息
<a name="more-information"></a>
+  在 Amazon CloudWatch 用户指南中@@ [创建用于停止、终止、重启或恢复实例的警报](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/UsingAlarmActions.html)
+  [PutMetricAlarm](https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/PutMetricAlarm.html)在 Amazon CloudWatch API 参考中
+  [EnableAlarmActions](https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/EnableAlarmActions.html)在 Amazon CloudWatch API 参考中
+  [DisableAlarmActions](https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/DisableAlarmActions.html)在 Amazon CloudWatch API 参考中