Chkdomains script

!/usr/bin/php -q

<?php

/* Copyright 10/30/2006 freelock computing

 *


  chkdomains.php
 basic site monitoring script
 sends an email when status is different than previous running of the script






 ***







 installation instructions
 create a /var/www/conf directory to store this
  /var/www/conf/satus contains the cache result
  this must be writable by the user running the job
  add a  URL to the $site array for each site to check
  set $mailto to appropriate email addresses, comma seporated
  schedual the cron job (php command line package required php_cli)
 
  The status file needs to be writiable by the script ( a user accont
  that runs the script)
 
 on your server that is to be checked,  create a textfile called "FILENAME" with your success string, this must match exactly, newlines and whitespace matter.






 ***







 Testing instructions
 delete or change the contents of the domain_uptime.txt
 run the script
 check the contents of the new domain_uptime.txt file
 check your email

 *








 ***







 files, 
 on each server, uptime.txt
 on monitoring system

     /var/www/conf/chkdomains.php (this file)


   /var/www/conf/status/domain_uptime.txt  conists of 1's and 0's seporated by newlines, this is rewritten every run. 1's represent server being up, 0's represent server being down.
/




 fully qualified URLS of http servers with a trailing slash

$site[] = "http://yoursite1.com/";

$site[] = "http://yoursite2.org/";

$site[] = "http://yoursite3.net/";



 email address(es) seporated by commas

$mailto = "sys-admin@yourdomain.com,optionaladditional@email.com";



file to check from servers listed above

define('FILENAME', "uptime.txt"); 



file contents must match exactly

define('SUCCESS', "success");  



file to store the status of the last run

define('STATUS_FILE', '/var/www/conf/status/domain_uptime.txt'); #


$out = '';


for ($i=0; $i
{

    $filename = $site[$i] . FILENAME;

    

    if ($fp=@fopen($filename,'r')){

        $err = socket_get_status($fp);

        if ($err['timed_out']) {

            $txt = "$filename timed out\n";

            $status[$i]= 0;

        }

        else

        {

            $text = trim(fread($fp, 2048));

      

        $txt = $filename. ': ' . $text . '(' . ($text==SUCCESS) . ")\n";

            $status[$i]=1;

        }

        fclose($fp);

    } else {

    

        $txt = "$filename not opened\n";

        $status[$i]=0;

    }

 

    $out .= $txt;

}


$changed = false;

if ($oldstatus= @file(STATUS_FILE))

{

    for ($i=0;$i
    {

        if ($status[$i]!=trim($oldstatus[$i]))

        {

            $changed = true;

        }

    }

}

else

{

    $changed = true;

}


if ($changed)

    {

        $fp = fopen(STATUS_FILE, 'w');

        for ($i=0;$i
        {

            fwrite($fp, $status[$i] . "\n");

        }

fclose($fp);

mail( $mailto , 'Domain Uptime Report: Status Change', $out);

    }


?>