automated subdomain creation amazon ec2

I am using amazon ec2 .... I want a script which creates subdomain when an user registers or user has the option to create subdomin as needed..?

can anyone suggest a script for this.. preferably php..

Thanks

If you are using apache web server and and a fedora linux, you have to do the following things

In your dns add a wild card entry. Suppose your domain name is demo.com the dns entry like

*.demo.com IN A 192.168.1.100

Replace the ip with your ip.

Then anything.demo.com will come to your server.

We have to configure apache to handle the subdomain.

For each subdomain we have to

• create a document root folder
• create a virtual host file and
• restart apache

The following php is in line with the above idea.

    <?php
    define('DOMAIN','demo.com');
    define('DOCROOT','/home/username/www/');
    define('CONF_FOLDER','/etc/httpd/conf.d/');

    /*
    * Function to create conf file in conf.d folder
    */
    function createNewVhostFile($subdomain) {
        $filename   = CONF_FOLDER.$subdomain.'.conf';
        $fh         = fopen($filename, 'w') or die("can't open file");
        $servername = $subdomain.".".DOMAIN;
        $docroot    =  DOCROOT.$subdomain; 

    $virtualhost = <<<HEREDOC
    <VirtualHost $servername > 
     DocumentRoot $docroot
     ServerName  $servername
     ServerAlias $servername
    </VirtualHost> 
    HEREDOC;

        fwrite($fh, $virtualhost);
        fclose($fh);
    }

    /*
    * Function to restart apache
    */
    function restartApache() {
        $configtest = `apachectl configtest 2>&1`;
        echo $configtest;
        if(strtolower(trim($configtest)) == 'syntax ok'){
            $restart = `/etc/init.d/httpd restart 2>&1`;
            echo $restart;
        }
    }

    /*
    * Create document root folder.
    */
    function createDocRoot($subdomain){
        $docroot =  DOCROOT.$subdomain; 
        if(is_dir($subdomain)){
            echo "Document root allready exists.";
        }else{
            mkdir($docroot,644);
        }
    }

    $subdomain = "sub";
    createDocRoot($subdomain);
    createNewVhostFile($subdomain);
    restartApache();
    ?>

You have to run this script as root user. In the virtual host configuration file you can add more options. You can also check the answer to a similar question question.

Hope that helps.