Re: [libvirt] Using external ceph.conf for RBD pools and disks

On Fri, 1 Nov 2013, Daniel P. Berrange wrote: > We have always taken the position that we do not want to rely on host > configuration in this way. The goal of the XML configs is that they > fully describe the functional setup of the resource in question. This > is to ensure that if you put the same XML config on two different hosts > you can be sure that they will operate in the same way. If you leave out > a bunch of config information and rely on the host ceph.conf file, then > you can no longer ever be sure if two hosts are configured the same way > with libvirt. I suspected that might be the case -- half the reason I sent my email, really! If it's desireable to not rely on any host configuration at all, should we be explicitly be passing conf=/dev/null to QEMU when setting up a RBD device?

As I mentioned before, without that QEMU will implicitly try to find a system ceph.conf file using a built-in librados search path. Would this actually be backwards-incompatible change given it was never documented by libvirt?