OVH - Check Server Availability Tool

frs-ovh_checkserver.php

<?php
# ovh - check server availability tool
# author: furious
# crontab (every 5 min): */5 * * * *  php -f /path/to/checkserver.php

/* CONFIG */
define('EMAIL', '[email protected]');
define('SERVERS', array('1801armada01', '1801sys12'));

define('OVH_CHECK_URL', 'http://ws.ovh.com/dedicated/r2/ws.dispatcher/getAvailability2');
define('LAST_CHECK_FILE', dirname(__FILE__). '/checkcache.json');

if($json = file_get_contents(LAST_CHECK_FILE)){
	$cache = json_decode($json);
} else {
	$cache = (object) array();
}

if($json = json_decode(file_get_contents(OVH_CHECK_URL)) and $available = $json->answer->availability){
	$notify = false;
	foreach ($available as $server){
		$servername = $server->reference;
		if(in_array($servername, SERVERS)){
			$zones = array();
			foreach ($server->zones as $z){
				$status = $z->availability == "unavailable" ? "unavailable" : "available";
				if($status != 'unavailable' and (!isset($cache->{$servername}) or in_array($z->zone, $cache->{$servername}->unavailable))){
					$notify = true;
				}
				$zones[$status][] = $z->zone;
			}

			$msg = "Server: {$servername}\n";
			foreach ($zones as $status => $z) $msg .= "{$status}: " . implode(', ', $z) . "\n";
			echo $msg;

			$cache->{$servername} = (object) $zones;
			$cache->{$servername}->message = $msg;
		}
	}
	file_put_contents(LAST_CHECK_FILE, json_encode($cache));

	if(defined('EMAIL') and $notify){
		$msg = array();
		foreach ($cache as $server => $info) {
			$msg[] = $info->message;
		}
		mail(EMAIL, date('[d/m/Y H:i:s]') . " | OVH - Server Availability", implode("\n\n", $msg));
	}
}
?>