Determining when a guest booted / how long it's been running

[wferi at niif.hu]

Digimer <lists at alteeve.ca> writes:

> I did find a way to do it working around virsh, but of course I'd
> prefer to directly query the source instead of infering it if possible.

Speaking about other possible workarounds, what about watching the
/var/log/libvirt/qemu/*.log files (assuming you use the QEMU driver)?
Those contain timestamps of QEMU startups (and other info).  Or if
you've got systemd around, "machinectl status" prints the start time of
a given VM.  If you don't want to mistake live migrations for fresh
startups, more careful log analysis will be needed, though.  And your
current solution may still be the best for your exact purpose, of
course.
-- 
Regards,
Feri