On Wed, 14 May 2008, Daniel P. Berrange wrote:
I might even go further and publish all resource statistics over mDNS. Maybe people have ideas about this too, securitywise i'm not really interested in the implications since I'm publishing it on a management LAN.
This is already a solved problem - any resource monitoring system can publish this kind of information. Rich Jones has already written libvirt plugins for both collectd and nagios to publish VM information, and so there's no need to re-invent this in libvirtd itself, nor abuse Avahi/mDNS service discovery for this purpose
http://collectd.org/documentation/manpages/collectd.conf.5.shtml#plugin_libv... http://et.redhat.com/~rjones/nagios-virt/
I'm currently implementing resource balancing between hosts. So one way or the other I want to receive or pull from the active hosts in the network their active states. And migrate host from heavy used machines to unused ones. Also, bias new started VMs to an unused machine. I see the collectd plugin takes the opposite approach which need to specify information while this is unknown for my statistics management. What I made is currently an avahi-based-libvirt-statistics-fetcher. And I presume the best situtation would be if it was an avahi-based-libvirt-statistics-receiver. If I'm reinventing the wheel because ovirt does this already or something like it... please tell me. Stefan