alarmes.php

<?php

define('APPLICATION_PATH', realpath(dirname(__FILE__)));

include APPLICATION_PATH . '/vendor/autoload.php';
require_once 'lib.php';

use Aws\CloudWatch\CloudWatchClient;

// Load config file.
$conf = getConfigFile();
if ($conf === false) {
    echo "Conf file is not valid";
    die();
}
// Store metric by namespace in order to call "AWS Could Watch" one time per namespace
$metricsToPush = array();

// Get Instance Id
if ($conf->aws->instance) {
    $instanceId = $conf->aws->instance;
} else {
    $instanceId = file_get_contents("http://169.254.169.254/latest/meta-data/instance-id");
}

$client = getCloudWatchClient($conf);

foreach ($conf->metrics as $metrics) {
    foreach ($metrics as $metricName => $metric) {
        $pluginName = isset($metric->{'plugin'}) === true ? $metric->{'plugin'} : $metricName;
        $className  = "CloudWatchScript\\Plugins\\" . $pluginName . "Monitoring";
        $period     = isset($metric->period) === true ? $metric->period : 300;
        $action     = isset($metric->action) === true ? $metric->action : $conf->alarms->action;

        $metricController = new $className($metric, $metric->name);

        foreach ($metricController->getAlarms() as $key => $alarm) {
            $client->putMetricAlarm(array(
                'AlarmName' => $alarm["Name"],
                'AlarmDescription' => $metric->description,
                'ActionsEnabled' => true,
                'OKActions' => array($action),
                'AlarmActions' => array($action),
                'InsufficientDataActions' => array($action),
                'Dimensions' => array(
                    array('Name' => 'InstanceId', 'Value' => $instanceId),
                    array('Name' => 'Metrics', 'Value' => $metricName)
                ),
                'MetricName' => $metricController->getMetricName($alarm["Name"]),
                'Namespace' => $metric->namespace,
                'Statistic' => 'Average',
                'Period' => $period,
                'Unit' => $metricController->getUnit($alarm["Name"]),
                // EvaluationPeriods is required
                'EvaluationPeriods' => 2,
                // Threshold is required
                'Threshold' => $alarm["Threshold"],
                // ComparisonOperator is required
                'ComparisonOperator' => $alarm["ComparisonOperator"]
            ));
        }
    }
}