options:
   openstack-origin:
        default: distro
        type: string
        description: |
          Repository from which to install.  May be one of the following:
          distro (default), ppa:somecustom/ppa, a deb url sources entry,
          or a supported Cloud Archive release pocket.

          Supported Cloud Archive sources include: cloud:precise-folsom,
          cloud:precise-folsom/updates, cloud:precise-folsom/staging,
          cloud:precise-folsom/proposed.

          Note that updating this setting to a source that is known to
          provide a later version of OpenStack will trigger a software
          upgrade.
   webroot:
        default: "/horizon"
        type: string
        description: |
            Directory where application will be accessible, relative to
            http://$hostname/.