Extend ansible hostnames

I have been playing with ansible recently and quite like some of what I see.

One issue I have when setting up the ansible hosts file, which contains the inventory of all hosts known to ansible, is that at work my hosts have a slightly more complex pattern which ansible can not directly match, see http://ansible.cc/docs/patterns.html. So I patched 1.0 to cope with these.

This provides for:

  • multiple patterns in a single hostname
  • the optional use of a step in [1:99:3] to generate hosts which don’t increase by 1.

The patch can be found here: http://merlin.wl0.org/201305/01/ansible-1.0-extend-patterns.patch and this allows me to include several types of servers at work in a simpler pattern more easily.

My python is still a bit rusty but this seems to do the right thing. It would be nice to see this patch incorporated into ansible.

Update 2013-06-06

I’ve just upgraded ansible on my Mac to 1.1 (via macports) and this patch hasn’t been applied yet. I think 1.2 is out soon so I’ll see if I can poke the developers to get this patch included. See: https://github.com/ansible/ansible/issues/3135

Published by

Simon J Mudd

Born in England, I now live in Spain, but spent a few years living in the Netherlands. I previously worked in banking (financial markets) both in IT and as a broker, but IT has always had a stronger influence. Now working at booking.com as a Senior Database Administrator. Other interests include photography, and travel. Simon is married, with two children and lives in Madrid.

Leave a Reply