Open Stack

     A fair bit of my setup uses service names for automatic naming 
elsewhere.  For example, we have NFS mounts like /path/to/<servername> 
and automatic DNS like <servername>.example.org

     Of course, if a user is determined to to create a less useful 
instance, they can create one with a name like "...."  or "../../.." 
which will result in hilarity.

     I'm sure that I'm not the only one who regards a server name as 
useful for naming other resources.  What solutions do you use? Is there 
a way to tell nova or Horizon to restrict server names to a given pattern?