Question

http://forge.puppetlabs.com – Is there a module for deploying Rails using puppet on a Ubuntu machine.

Answer 1

You can write a module to deploy rails using puppet, something like following:
/puppet/modules/rails/init.pp

class rails {
$package = ["rails"]

package { $package:
       ensure => installed,
}

}

/puppet/manifests/site.pp

node * {
      include rails
}