Hi,
I've been reviewing 3 solutions suggested for monitoring oVirt's mirror sites: mirmon(used by CentOS), Debian Mirror Checker, MirrorManager(used by Fedora). I've put what I gathered so far here(google docs).

imo, there are 2 main problems:
1. monitoring that the mirrors are up and synced( logs and http access)
2. updating the mirrorlist(../yum-repo/mirrorlist) file automatically when a mirror site is not synced after X amount of time.

so far installing only mirmon, it seems like the simpler tool that can address problem 1 easily, in order to handle problem 2 another script that filters the log file needs to be written.

MirrorManager needs further inspection(has many other features which I am not sure if we need?)
and Debian Mirror Checker, i think, is not worth it(incomplete docs, not maintained, debian infra specific - assuming I found the correct repository)

what do you think?