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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
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/*
*/
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/* ////////////////////////////////////////////////////////////////////////////
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* Purpose: enable_alarm_actions.cpp demonstrates how to enable actions on an Amazon CloudWatch metric alarm.
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*
* Prerequisites:
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* An Amazon CloudWatch metric alarm.
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*
* Inputs:
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* - alarm_name: The name of the alarm (entered as the second argument in the command line).
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* - instanceId: The instance ID of the alarm (entered as the third argument in the command line).
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* - actionArn: The Amazon Resource Name (ARN) of the action (entered as the third argument in the command line).
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*
* Outputs:
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* The metric alarm is enabled.
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* ///////////////////////////////////////////////////////////////////////// */
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// snippet-start:[cw.cpp.enable_alarm_actions.inc]
# include <aws/core/Aws.h>
# include <aws/monitoring/CloudWatchClient.h>
# include <aws/monitoring/model/EnableAlarmActionsRequest.h>
# include <aws/monitoring/model/PutMetricAlarmRequest.h>
# include <iostream>
// snippet-end:[cw.cpp.enable_alarm_actions.inc]
void CreateAlarmAndEnableActions (
const Aws : : String & alarm_name , const Aws : : String & instanceId ,
const Aws : : String & actionArn )
{
// snippet-start:[cw.cpp.enable_alarm_actions.code]
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 ;
// snippet-end:[cw.cpp.enable_alarm_actions.code]
}
/**
* Adds a cloud watch alarm to an instance based on CPU utilization. This alarm
* includes a command-line specified ARN that dictates what action to take when
* the alarm transitions into the Alarm state
*/
int main ( int argc , char * * argv )
{
if ( argc ! = 4 )
{
std : : cout < < " Usage: " < < std : : endl < < " enable_alarm_actions " < <
" <alarm_name> <instance_id> <alarm_action_arn> " < < std : : endl ;
return 1 ;
}
Aws : : SDKOptions options ;
Aws : : InitAPI ( options ) ;
{
Aws : : String alarm_name ( argv [ 1 ] ) ;
Aws : : String instanceId ( argv [ 2 ] ) ;
Aws : : String actionArn ( argv [ 3 ] ) ;
CreateAlarmAndEnableActions ( alarm_name , instanceId , actionArn ) ;
}
Aws : : ShutdownAPI ( options ) ;
return 0 ;
}
