I would dearly love for Foreman to expand and fill the gap in my infrastructure currently filled by Rundeck. This is a huge feature request and so I put together a wiki page on it with as much initial information as I could think to flesh out. It may not be appropriate for Foreman or something you are willing to look at.

You can see the page at http://www.theforeman.org/projects/foreman/wiki/Scripted_Processes