metrics.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");
}

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

        $metricController = new $className($metric, $metricName);

        if (!array_key_exists($metric->namespace, $metricsToPush)) {
            $metricsToPush[$metric->namespace] = array();
        }
        $metrics = $metricController->getMetric();
        if (is_array($metrics)) {
            $units = $metricController->getUnit();
            foreach ($metrics as $metricId => $value) {
                $metricsToPush[$metric->namespace][] = array(
                    'MetricName' => $metric->name . " " . $metricId,
                    'Timestamp' => time(),
                    'Value' => $value,
                    'Unit' => $units[$metricId],
                    'Dimensions' => array(
                        array('Name' => 'InstanceId', 'Value' => $instanceId),
                        array('Name' => 'Metrics', 'Value' => $metricName)
                    )
                );
            }
        } else {
            $metricsToPush[$metric->namespace][] = array(
                'MetricName' => $metric->name,
                'Timestamp' => time(),
                'Value' => $metrics,
                'Unit' => $metricController->getUnit(),
                'Dimensions' => array(
                    array('Name' => 'InstanceId', 'Value' => $instanceId),
                    array('Name' => 'Metrics', 'Value' => $metricName)
                )
            );
        }
    }
}

$client = getCloudWatchClient($conf);

foreach ($metricsToPush as $namespace => $metricData) {
    $client->putMetricData(array(
        'Namespace' => $namespace,
        'MetricData' => $metricData
    ));
}