Synnefo » snf-ganeti » ganeti-local

.. admonition:: Why a fully qualified host name

   Although most distributions use only the short name in the /etc/hostname

   file, we still think Ganeti nodes should use the full name. The reason for

   this is that calling 'hostname --fqdn' requires the resolver library to work

   and is a 'guess' via heuristics at what is your domain name. Since Ganeti

   can be used among other things to host DNS servers, we don't want to depend

   on them as much as possible, and we'd rather have the uname() syscall return

   the full node name.

   We haven't ever found any breakage in using a full hostname on a Linux

   system, and anyway we recommend to have only a minimal installation on

   Ganeti nodes, and to use instances (or other dedicated machines) to run the

   rest of your network services. By doing this you can change the

   /etc/hostname file to contain an FQDN without the fear of breaking anything

   unrelated.