My MongoDB and PHP Famous 5 Minutes Tutorial

Did you ever wanted to integrate MongoDB monitoring with a third party service?
Did you wanted to integrate MongoDB performance counters with your load stress environment?

This 5 minutes tutorial will help you expose these details to any third party service or application using a simple JSON service, PHP and MongoDB:

1. Install Apache and PHP and php-devel: sudo yum -y install httpd php php-devel php-pear
2. Install PHP MongoDB Driver: sudo pecl install mongo
3. Add extension=mongo.so to you /etc/php.ini
4. Create a short monitoring code as mongo.php and place it at /var/www/html/:

header('Cache-Control: no-cache, must-revalidate');

header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');

header('Content-type: application/json;charset=UTF-8');

class Monitor {

public $VirtualMemory_MB;

public $PageFaults;

public $CurrentConnections;

public $NetworkIO_In_MB;

public $NetworkIO_Out_MB;

public $SpeedIO_Avg_ms;

public $LockRatio_Per;

public $ReadersLocked;

public $WritersLocked;

public $ObjectsInDatabase;

public $DatabaseDataSize_MB;

public $DatabaseIndexSize_MB;

public $IndexMissRatio_Per;

public $CursorsTimedOut;

public $DeleteSelectRatio_Per;

public $InsertSelectRatio_Per;

public $UpdateSelectRatio_Per;

}

if (!isset($_REQUEST['db'])) {

header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error', true, 500);

echo json_encode(array('status'=>0,'message'=>'db is missing'));

exit;

}

$databaseName = $_REQUEST['db'];

// connect

$m = new MongoClient();

// select a database

$db = $m->$databaseName;

$ret = $db->execute('db.stats();');

$result = new Monitor;

$result->ObjectsInDatabase = $ret["retval"]["objects"];

$result->DatabaseDataSize_MB = $ret["retval"]["dataSize"];

$result->DatabaseIndexSize_MB = $ret["retval"]["indexSize"];

//var_dump($ret);

$ret = $db->execute('db.serverStatus();');

$result->VirtualMemory_MB = $ret["retval"]["mem"]["virtual"];

$result->PageFaults = $ret["retval"]["extra_info"]["page_faults"];

$result->CurrentConnections = $ret["retval"]["connections"]["current"];

$result->NetworkIO_In_MB = $ret["retval"]["network"]["bytesIn"]/1000000;

$result->NetworkIO_Out_MB = $ret["retval"]["network"]["bytesOut"]/1000000;

$result->SpeedIO_Avg_ms = $ret["retval"]["backgroundFlushing"]["average_ms"];

$result->LockRatio_Per = $ret["retval"]["globalLock"]["lockTime"]/$ret["retval"]["globalLock"]["totalTime"]*100;

$result->ReadersLocked = $ret["retval"]["globalLock"]["currentQueue"]["readers"];

$result->WritersLocked = $ret["retval"]["globalLock"]["currentQueue"]["writers"];

$result->IndexMissRatio_Per = $ret["retval"]["indexCounters"]["btree"]["missRatio"];

$result->CursorsTimedOut = $ret["retval"]["cursors"]["timedOut"];

$result->DeleteSelectRatio_Per = $ret["retval"]["opcounters"]["delete"]/$ret["retval"]["opcounters"]["query"]*100;

$result->InsertSelectRatio_Per = $ret["retval"]["opcounters"]["insert"]/$ret["retval"]["opcounters"]["query"]*100;

$result->UpdateSelectRatio_Per = $ret["retval"]["opcounters"]["update"]/$ret["retval"]["opcounters"]["query"]*100;

echo json_encode($result);

?>

Bottom Line

You MongoDB is ready for monitoring by an external service: http://localhost/mongo.php

Keep Performing,

Moshe Kaplan