Introduction

I used this kind of script because it’s simpler to open a small web page to view VM activity rather than launching a bunch of commands.

Sudo

You need sudo because by default Apache doesn’t have the necessary rights to execute these commands:

  apt-get install sudo

Then edit /etc/sudoers and add the following:

  www-data        ALL=NOPASSWD: /usr/sbin/vserver-stat,/usr/sbin/xm list

Php and script

You obviously need to have Apache and PHP installed for this to work:

  apt-get install apache2 php5

Additionally, there’s a small JavaScript that refreshes the page every 60 seconds.

Then create a folder and copy this into an index file:

  mkdir /var/www/virtual && vi /var/www/virtual/index.php

Here’s the content of index.php:

  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <script language="javascript" type="text/javascript">
    setTimeout("location.reload();", 600000);
  </script>
  <head>
    <meta content="text/html; charset=ISO-8859-1" http-equiv="content-type" />
    <title>Informations for Virtual Machines</title>
  </head>
  <body>
    <?php
       system("date +%c") ;
       echo("<BR><br />--- Vservers informations ---<br />") ;
    echo("<syntaxhighlight lang="text"
      >\n") ; system("sudo /usr/sbin/vserver-stat") ; echo("</syntaxhighlight
    >\n") ; echo("<br />") ; echo("--- Xen informations ---<br />") ;
    echo("<syntaxhighlight lang="text"
      >\n") ; system("sudo /usr/sbin/xm list") ; echo("</syntaxhighlight
    >") ; ?>
  </body>
</html>

Now set the proper permissions:

  chown -Rf www-data. /var/www/virtual

All that’s left is to access it :-)

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Last updated 14 May 2007, 10:09 CEST. history