The jenkins-stage machine could use an extra disk mounted at /var/lib/jenkins. That's the bit that would use up all the space anyway on the disk. 100G to start with would be good.
Done, see: https://github.com/gluster/gluster.org_ansible_configuration/commit/46fa914013f4b1f686038a000849dff2a9cf49aa I am however unsatisfied by the current way I did, so it may not be the perfect example of integration I was looking for, and may refactor that later. We need to move data from current partition to the new one, I will see on irc with Nigel (just a cp)
This is now fixed.