Your own apache virtual host configuration with puppet

apache.pp

class apache {
  package { "apache2":
    ensure => present
  }   

  service { "apache2":
    enable => true,
    ensure => running,
    require => Package["apache2"]
  }   
}

vhost.erb

<VirtualHost *:80>
    ServerName <%= domain %>
    ServerAdmin admin@<%= domain %>
    DocumentRoot <%= docroot %>
    ErrorLog ${APACHE_LOG_DIR}/<%= domain %>.error_log
    CustomLog ${APACHE_LOG_DIR}/<%= domain %>.access_log common
    <Directory /var/www/<%= domain %>> 
        Allow from all 
        Options +Includes +Indexes +FollowSymLinks
        AllowOverride all 
    </Directory>
     ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
    <Directory "/usr/lib/cgi-bin">
        AllowOverride None
        Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
        Order allow,deny
        Allow from all 
    </Directory>
</VirtualHost>

vhost.pp

define apache::vhost ($docroot, $domain, $vhost_name) {
    include apache
    file { "/etc/apache2/sites-available/${vhost_name}.conf":
    content => template("apache/vhost.erb"),
    notify => Exec["enable-${vhost_domain}-vhost"],
  }   

  exec { "enable-${vhost_domain}-vhost":
    command => "/usr/sbin/a2ensite ${vhost_name}.conf",
    require => [ File["/etc/apache2/sites-available/${vhost_name}.conf"], Package["apache2"] ],
    refreshonly => true,
    notify => Service["apache2"],
  }   
}