Publishing Custom Metrics in Amazon CloudWatch

Metrics are data about the performance of your systems. An alarm watches a single metric over a time period you specify, and performs one or more actions based on the value of the metric relative to a given threshold over a number of time periods.

The examples below show how to:

All the example code for the AWS SDK for PHP is available here on GitHub.

Credentials

Before running the example code, configure your AWS credentials, as described in Credentials.

Publish Metric Data

require 'vendor/autoload.php';
use Aws\CloudWatch\CloudWatchClient;
use Aws\Exception\AwsException;

$client = new CloudWatchClient([
    'profile' => 'default',
    'region' => 'us-west-2',
    'version' => '2010-08-01'
]);
try {
    $result = $client->putMetricData(array(
        'Namespace' => 'string',
        'MetricData' => array(
            array(
                'MetricName' => 'string',
                //Timestamp : mixed type: string (date format)|int (unix timestamp)|\DateTime
                'Timestamp' => time(),
                'Value' => integer,
                'Unit' => 'Kilobytes'
            )
        )
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}

Create an Alarm

require 'vendor/autoload.php';
use Aws\CloudWatch\CloudWatchClient;
use Aws\Exception\AwsException;

$client = new CloudWatchClient([
    'profile' => 'default',
    'region' => 'us-west-2',
    'version' => '2010-08-01'
]);
try {
    $result = $client->putMetricAlarm(array(
        // AlarmName is required
        'AlarmName' => 'string',
        // MetricName is required
        'MetricName' => 'string',
        // Namespace is required
        'Namespace' => 'string',
        // Statistic is required
        //string: SampleCount | Average | Sum | Minimum | Maximum
        'Statistic' => 'string',
        // Period is required
        'Period' => integer,
        'Unit' => 'Count/Second',
        // EvaluationPeriods is required
        'EvaluationPeriods' => integer,
        // Threshold is required
        'Threshold' => interger,
        // ComparisonOperator is required
        // string: GreaterThanOrEqualToThreshold | GreaterThanThreshold | LessThanThreshold | LessThanOrEqualToThreshold
        'ComparisonOperator' => 'string',
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}