On Sun, Jun 12, 2022 at 00:16:20 +0200, Gionatan Danti wrote: > Il 2022-06-11 19:32 Laine Stump ha scritto: [...] > > I guess you'll need to do a "virsh dumpxml --inactive" for each guest > > and parse it out of there. > > It matches my results. However, virsh dumpxml is an expensive operation - > polkitd can easily burn >30% of a single core for 1s polling interval with > virsh dumpxml. I settled (for testing) with grepping "mode..vepa" in > /etc/libvirtd/qemu and it seems to work well (1s polling not even register > in top). The unfortunate thing about using `virsh dumpxml $VM` as written is that it opens a connection (which uses polkit to auth), gets the XML and then closes the connection. If you want it to be more optimized you can e.g. write a script using python bindings for libvirt and simply keep the connection open ... > Does libvirt support calling some external script when a new virtual machine > is defined? ... which additionally allows you to register 'domain lifecycle events' [1] which give you a trigger when a new VM is defined. https://www.libvirt.org/html/libvirt-libvirt-domain.html#virConnectDomainEventRegister https://www.libvirt.org/html/libvirt-libvirt-domain.html#virDomainEventID
