Re: [ovirt-users] Some VMs in status "not responding" in oVirt interface

This is a multi-part message in MIME format. ------=_NextPartTM-000-4a9428dc-2b1c-4caf-8ee3-a447a009db9b Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi Christian,=0A= =0A= you are right. These are different errors. In the past we had VM hangs or c= rashes from time to time.=0A= So we implemented 2 features for mitigation. That helped to analyze a lot o= f problems.=0A= =0A= 1) Install debug packages to get backtraces in case of stalled qemu process= es.=0A= 2) Setup the hosts to generate coredumps for qemu:=0A= =0A= a) /etc/security/limits.conf=0A= * soft core unlimited=0A= b) /usr/lib/systemd/system/libvirtd.service section Service=0A= LimitCORE=3Dinfinity=0A= c) create new before vdsm start hook to disable full qemu memory dump=0A= libvirtpid=3D`ps -ef | grep libvirt | grep listen | awk '{ print $2 }'`= =0A= echo 0 > /proc/$libvirtpid/coredump_filter=0A= =0A= Best regards.=0A= =0A= Markus=0A= =0A= ________________________________________=0A= Von: Christian Hailer [christian(a)hailer.eu]=0A= Gesendet: Donnerstag, 17. September 2015 07:39=0A= An: 'Daniel Helgenberger'; Markus Stockhausen=0A= Cc: ydary(a)redhat.com; users(a)ovirt.org=0A= Betreff: AW: AW: [ovirt-users] Some VMs in status "not responding" in oVirt= interface=0A= =0A= Hi,=0A= =0A= just to get it straight: most of my VMs had one or more existing snapshots.= Do you think this is a problem currently? If I understand it correctly the= BZ of Markus concerns only a short period of time while removing a snapsho= t, but my VMs stopped responding in the middle of the night without any int= eraction...=0A= I deleted all the snapshots, just in case :) my system is running fine for = nearly three days now, I'm not quite sure but I think it helped that I chan= ged the HDD and NIC of the Windows 2012 VMs to VirtIO devices...=0A= =0A= Best regards, Christian=0A= =0A= -----Urspr=FCngliche Nachricht-----=0A= Von: Daniel Helgenberger [mailto:daniel.helgenberger@m-box.de]=0A= Gesendet: Dienstag, 15. September 2015 22:24=0A= An: Markus Stockhausen <stockhausen(a)collogia.de>; Christian Hailer <christi= an(a)hailer.eu&gt;=0A= Cc: ydary(a)redhat.com; users(a)ovirt.org=0A= Betreff: Re: AW: [ovirt-users] Some VMs in status "not responding" in oVirt= interface=0A= =0A= =0A= =0A= On 15.09.2015 21:31, Markus Stockhausen wrote:=0A= =0A= Markus, thanks for the BZ. I think I do see the same issue. Actually my VM = is currently the only with a live snapshot and (puppetmaster) does a lot of= I/O.=0A= =0A= Christian, maybe this BZ1262251 also applicable?=0A= =0A= I'll go ahead and delete the live snapshot. If I see this issue again I wil= l submit the trace to your BZ.=0A= =0A= =0A= lled qemu-kvm-tools, maybe this is the pendant for CentOS?=0A= e.=0A= r@m-box.de>:=0A= f qemu-kvm process>'=0A= l: true. Entities affected : ID:=0A= ain id 84dcb2fc-fb63-442f-aa77-3e84dc7d5a72.=0A= essage: VM foreman is not responding.=0A= =0A= m=0A= helped.=0A= Stack:=0A= =0A= --=0A= Daniel Helgenberger=0A= m box bewegtbild GmbH=0A= =0A= P: +49/30/2408781-22=0A= F: +49/30/2408781-10=0A= =0A= ACKERSTR. 19=0A= D-10115 BERLIN=0A= =0A= =0A= www.m-box.de www.monkeymen.tv=0A= =0A= Gesch=E4ftsf=FChrer: Martin Retschitzegger / Michaela G=F6llner=0A= Handeslregister: Amtsgericht Charlottenburg / HRB 112767=0A= ------=_NextPartTM-000-4a9428dc-2b1c-4caf-8ee3-a447a009db9b Content-Type: text/plain; name="InterScan_Disclaimer.txt" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="InterScan_Disclaimer.txt" **************************************************************************** Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. 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