#kubevirt

vossel, sorry it took a while :) here is what has been done for openstack wrt libvirt watchdog - https://wiki.openstack.org/wiki/LibvirtWatchdog and https://review.openstack.org/#/q/topic:bp/libvi...

vladikr, thanks

vossel, there is also a pvpanic device that gets events when a panic occur in the guest

I've been trying to implement something with it in nova, but it was hard to find a suitable place to store the dumps properly for users to access.. https://blueprints.launchpad.net/nova/+spec/lib...

does pvpanic require any guest daemons?

vossel, I can't remember now, but I don't think so... IIRC it listens to acpi events

vladikr, ah interesting. but it seems like the libvirt watchdog does require a guest daemon

i was kind of hoping we'd be able to have some sort of default sanity check that didnt require guest configuration. maybe pvpanic will give us something to work with

guest configuration meaning something actually has to be configured within the guest, not the libvirt xml

vossel, yeah, it needs the guest agent running

qemu-ga

vladikr, 'it' meaning watchdog, pvpanic, or both?

vossel, sorry, I mean, watchdog requires a guest agent

got it, thanks

vossel, I think we can take the same approach as in openstack , provide advanced sanity check if agent is present, otherwise provide something very limited

vladikr, is pvpanic the only limited approach? or are there others?

vossel, no, pvpanic won't give us anything more than a notification that there was a panic (and maybe the vm dump )

vossel, I think, we should use pvpanic in parallel to the watchdog

vladikr, did you have any thoughts on the "very limited" approach to use if qemu-ga isn't present?

vossel, we could check for memory changes, but I'm not sure how authentic is it

vladikr, interesting, there might be some checks we can do for cpu activity as well i suppose. i'll keep investigating

vossel, for memory changes, there is dommemstat ( or something like that ) or a qemu monitor command "info mem"

like virsh qemu-monitor-command --hmp "domain name" "info meme"

s/meme/mem

:)

interesting, thanks!

fromani, nice https://github.com/fromanirh/virt-collectd-expo...

fabiand: thanks! hopefully the minimum we need.

right

mpolednik, was actually pretty interested in your work

I hope that you either got or will get some feedback from him soon

fabiand: sure, as soon as he gets back from kvm forum!

yep :)

ah fabiand! you're a sight for sore eyes. how's the conference been?

sgott1, howdy!

sgott1, pretty nice

Amazing that talks can be _so_ low level

And tha tthe crwod comes up with valuable questions and a vivid discussion :)

Many nice talks ...

good to hear!

yep