Linux

// Config
define('EMAIL','[email protected]');//gmail account used in google calendar
define('PASS','xxx');//your gmail password
define('SERVER_NAME','your_servername');//just as reference server name
//level of avg load http://php.net/manual/en/function.sys-getloadavg.php
define('LEVEL_EMAIL',3);//load average to notify by email
define('LEVEL_SMS',5);//load average to notify by sms
// End Config
 
//Loading Zend_Gdata libraries
ini_set('include_path', 'ZendGdata/library');
require_once 'Zend/Loader.php';
Zend_Loader::loadClass('Zend_Gdata');
Zend_Loader::loadClass('Zend_Gdata_AuthSub');
Zend_Loader::loadClass('Zend_Gdata_ClientLogin');
Zend_Loader::loadClass('Zend_Gdata_Calendar');
//End Loading Zend_Gdata libraries
 
// Function to create a new Google Calendar event
function createQuickAddEvent ($client, $quickAddText) {
  $gdataCal = new Zend_Gdata_Calendar($client);
  $event = $gdataCal->newEventEntry();
  $event->content = $gdataCal->newContent($quickAddText);
  $event->quickAdd = $gdataCal->newQuickAdd('true');
  $newEvent = $gdataCal->insertEvent($event);
}
// End Function to create a new Google Calendar event
 
 
//load average
if (function_exists(sys_getloadavg)){
	$load=sys_getloadavg();
	$load=$load[0];
}
else{
	$content = file_get_contents("/proc/loadavg");
	$loadavg = explode(" ", $content);
	$load = $loadavg[0] + 0;
}
//end load average
 
 
//NOTIFICATIONS
 
// Email - Send email notification
if($load >= LEVEL_EMAIL){
    mail(EMAIL, "Alarm high server load (".$load.") ".SERVER_NAME, "");
}
 
//SMS - Add Event in Google Calendar
if($load >= LEVEL_SMS){
    $text = "Alarm high server load (".$load.") ".SERVER_NAME;
    $service = Zend_Gdata_Calendar::AUTH_SERVICE_NAME; // service name Google Calendar
    $client = Zend_Gdata_ClientLogin::getHttpClient(EMAIL,PASS,$service);
 
    // Hour and minute with 2 minutes delayment
    $hour= date("H");
    $minute= date("i")+2;
 
    // Creates the event in Google Calendar
    createQuickAddEvent($client, $text." ".$hour.":".$minute);
}    
//END NOTIFICATIONS