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Simple PHP Health Monitor for Windows Servers and Cisco Switches

I wrote (well-compiled from other people's code) a very simple time monitor for our servers - this is just an ICMP (ping) monitor, and it works great for our limited number of servers (about 20) and very fast. Here's the code (the actual ping verification functions, which I think are based on the work of Jensen Birk ( http://birk-jensen.dk/2010/09/php-ping/ ), and I just used its functions to display green a PNG mug when everything is inserted, and red for each server that is omitted (if any).

<html>
<head>
<style type='text/css'>

*{
    font-family:verdana,tahoma,arial;
    font-size:17px;
}

.light{width:30px;}

h1{
        font-size:25px;
}
</style>



<meta http-equiv="refresh" content="30">
</head>
<body>
<?php

$time1=date('H:i:s');
echo "Last Refresh Time = $time1<br/><hr/>";

error_reporting(0);

/*-----------------------------------------------------------------------------------------*/    
    // Checksum calculation function
    function icmpChecksum($data)
    {
    if (strlen($data)%2)
    $data .= "\x00";

    $bit = unpack('n*', $data);
    $sum = array_sum($bit);

    while ($sum >> 16)
    $sum = ($sum >> 16) + ($sum & 0xffff);

    return pack('n*', ~$sum);
    }


/*-----------------------------------------------------------------------------------------*/
    function PingTry1($pingaddress){
    // Making the package
    $type= "\x08";
    $code= "\x00";
    $checksum= "\x00\x00";
    $identifier = "\x00\x00";
    $seqNumber = "\x00\x00";
    $data= "testing123";
    $package = $type.$code.$checksum.$identifier.$seqNumber.$data;
    $checksum = icmpChecksum($package); // Calculate the checksum
    $package = $type.$code.$checksum.$identifier.$seqNumber.$data;
    // And off to the sockets
    $socket = socket_create(AF_INET, SOCK_RAW, 1);

    socket_set_option ( $socket, SOL_SOCKET, SO_RCVTIMEO, array("sec"=>1, "usec"=>0) );
    socket_connect($socket, $pingaddress, null);

    $startTime = microtime(true);
    socket_send($socket, $package, strLen($package), 0);
    if (socket_read($socket, 255)) {
    return true;
    }
    else{
    return false;
    }

    socket_close($socket);

    }
/*-----------------------------------------------------------------------------------------*/
   function DoTheCheck($name,$ip){
       global $errors;
       global $j;
       if (PingTry1($ip)==1){
    //do nothing
                      }else{
                      $j++;
                      $errors[$j] = "$name --> $ip";

                      }

    }
/*-----------------------------------------------------------------------------------------*/

//READ IN THE INI FILE INTO $filedata Array

$myFile1="hosts.ini";
$filehandle1 = fopen($myFile1, 'r') or die("Couldn't open file [$myFile1]");
$number1=count(file($myFile1));;
$filedata = fread($filehandle1, filesize($myFile1));
fclose($filehandle1);

// Create an array with each line of the file
$array1 = explode("\r\n", $filedata);

unset($filedata); //free up a bit of memory

foreach ($array1 as &$line) { // step through the array, line by line
    if (!empty($line)){
list ($name,$ip)=split(",",$line);
    DoTheCheck($name,$ip);
                 }
}


    if ($errors){

            echo 'The Following Hosts are down - <br/><br/><table>';

foreach ($errors as &$value) {
    $k++;
    echo '<tr><td><img class="light" src="red.png" /></td><td>'.$errors[$k].'</td></tr>';
}
echo '</tr></table>';
    }
else{echo '<img class="light" src="green.png" /><h1>ALL IPS ARE UP!</h1>';}




    ?>
    </body>
    </html>

, , , Cisco - , , "ping" .

script - .., , Google, , , 2 3 PHP n00b . , , 5 6 , , , , .

- :

   function ping($host, $timeout = 1) {
                /* ICMP ping packet with a pre-calculated checksum */
                $package = "\x08\x00\x7d\x4b\x00\x00\x00\x00PingHost";
                $socket  = socket_create(AF_INET, SOCK_RAW, 1);
                socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array('sec' => $timeout, 'usec' => 0));
                socket_connect($socket, $host, null);

                $ts = microtime(true);
                socket_send($socket, $package, strLen($package), 0);
                if (socket_read($socket, 255))
                        $result = microtime(true) - $ts;
                else    $result = false;
                socket_close($socket);

                return $result;
        }

:

    $url         = '192.168.1.1'; 
    $socket       = ( bool )false; 
    $error      = ( bool )false; 

    $socket = @fsockopen( $url, 23, $errno, $errstr, 1 ) or $error = ( bool )true; 

    if ( ( $socket ) && ( !$error ) ) 
    { 
        echo "bound";
        /* socket is bound - do something */ 
    } 
    else 
    { 
        echo "not bound , [$errstr]";
        /* socket is dead - errors are in $errno & $errstr */ 
    }  

if ($socket)fclose($socket);

, , IP-, ( , ), 5 , IP, .

, pcntl_fork ? "exec" AJAX ( - )

- Mac Layer (layer 2) - , - , , -, , , .

, , ( Dreaming:-D), .

EDIT - Net_Ping PEAR :

<?php

$time1=date('H:i:s');
echo "Last Refresh Time = $time1<br/><hr/>";

//not sure if still needed -       error_reporting(0);


require_once "Net/Ping.php";
$ping = Net_Ping::factory();

$ping->setArgs(array('count' => 2, 'ttl' => 50, 'timeout' => 1));
/*---------------------------------------------------------------------*/
function DoPing($ip)
{
    global $ping;

    $results = $ping->ping($ip);
    if ($results->_loss==0) {return true;}else{return false;}
}
/*---------------------------------------------------------------------------------*/
   function DoTheCheck($name,$ip){
       global $errors;
       global $j;

       if (DoPing($ip)==1){
    //do nothing
                      }else{
                      $j++;
                      $errors[$j] = "$name --> $ip";
                      }
    }
/*-----------------------------------------------------------------------------------*/

//READ IN THE INI FILE INTO $filedata Array

$myFile1="hosts.ini";
$filehandle1 = fopen($myFile1, 'r') or die("Couldn't open file [$myFile1]");
$number1=count(file($myFile1));;
$filedata = fread($filehandle1, filesize($myFile1));
fclose($filehandle1);

// Create an array with each line of the file
$array1 = explode("\r\n", $filedata);

unset($filedata); //free up a bit of memory

foreach ($array1 as &$line) { // step through the array, line by line
    if (  (!empty($line)) && (!strstr($line,'##'))  ) {
list ($name,$ip)=split(",",$line);
    DoTheCheck($name,$ip);
                 }
}

    if ($errors){

            echo 'The Following Hosts are down - <br/><br/><table>';

foreach ($errors as &$value) {
    $k++;
    echo '<tr><td><img class="light" src="red.png" /></td><td>'.$errors[$k].'</td></tr>';
}
echo '</tr></table>';
    }
else{echo '<img class="light" src="green.png" /><h1>ALL IPS ARE UP!</h1>';}

?>

... , 20 10 . 100 , . . , . , , Munin, -, (PHP).

+3
1

, Munin? , , , handcrafted script. ; ping. Munin .

Nagios Cacti, Munin .

PHP, PEAR Net_Ping, API .

:

, . Net_Ping , PHP . PHP pcntl, shell_exec. Ping script ping , ping . script , ping .

+1

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