We saw the issue on both 4.9.3 and 4.11.2. This seems to be a race in libvirt itself and was hit mostly when we put host in maintenance and 5 live migrations are processed in parallel. I don't recall triggering the bug migrating a single VM at a time.
On Thu, Nov 21, 2019 at 7:48 PM Andrija Panic <andrija.pa...@gmail.com> wrote: > That sucks...thx both. > > @both - which ACS version do you use (and encounter such issues?) > > Ubuntu comes with a whole another set of issues (I was losing my nerves > around very idiotic things, last time a week ago...) - though most can be > managed with some workarounds. > But yes, Qemu/libvirt should be better with Ubuntu - free of RedHat s$^%tty > business politics - i.e. in CentOS 6.x you were able to live migrate VM > WITH all the volumes to another host/storage. On CentOS 7 you can't do that > any more, unless you are using qemu-kvm-ev (but not the regular one from > the SIG CentOS repo, you need the one from the oVirt project) > > I'm just trying to understand if this is happening also on i.e. ACS 4.11 - > so to stop digging around the problem (and assume it's purely CentOS which > is broken - why all great things need to come to an end...damn it) > > (well I could also test same ACS code on Ubuntu and see if no issues there > with live migrations..) > > Thanks > Andrija > > On Thu, 21 Nov 2019 at 23:39, Jean-Francois Nadeau <the.jfnad...@gmail.com > > > wrote: > > > Hi Andrija, > > > > We experienced that problem with stock packages on CentOS 7.4. Live > > migration would frequently fail and leave the VM dead. We since moved > to > > RHEV packages for qemu. Libvirt is still stock per CentoS 7.6 (4.5). I > > want to say the situation improved but I can't tell yet if we have a 100% > > success rate on live migrations (as it should be !) > > > > Redhat also have been messing up severely with stock libvirt versions > > between 7.4/7.5/7.6 in such way it broke live migration compatibility > (cpu > > definitions). Im at the crossroads right now to entirely ditch > > centos/redhat in favor of Ubuntu to have well tested stock packages. > > > > best, > > > > -Jfn > > > > > > > > On Thu, Nov 21, 2019 at 5:25 PM Andrija Panic <andrija.pa...@gmail.com> > > wrote: > > > > > Hi guys. > > > > > > I wanted to see if any of you have seen similar/same in master, as > below. > > > > > > I've been testing some work/PRs (against the current master) and I've > > seen > > > that VMs will crash/be stopped occasionally when live migration is > > > happening. I experienced this on an NEW/EMPTY env, with 2 KVM hosts, > and > > > only SSVM and CPVM - not a capacity issues or similar. > > > > > > This is happening with CentOS 7 (CentOS 7.3 I believe, but we also > > updated > > > packages to the latest stock ones and same issue was happening again). > > > > > > This is still under investigation, but I was wondering if anyone else > has > > > seen similar thing happening? > > > > > > Best, > > > > > > -- > > > > > > Andrija Panić > > > > > > > > -- > > Andrija Panić >
