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...ll migrate all VMs to another hosts, but that monitor which checks VMs will migrate it after reboot. But I have race condition there that monitors can check that host is running before it is shutdown and will migrate VM's back to server which will reboot. Thank you for any help -- Ondřej Kunc, Senior Linux Administrator IGNUM s.r.o., Vinohradská 190, Praha 3, 130 61, CZE Mobil: +420 603 111 111 | Fax: +420 296 332 222 www.ignum.cz | www.domena.cz | www.webcloud.cz

...management so it is OK, that it is not implemented in libvirt library. What about prevention of VM migrations, is it acceptable to just close migration port in firewall ? Thank you Ondřej Dne 10.12.2013 14:34, Daniel P. Berrange napsal(a): > On Mon, Dec 09, 2013 at 01:01:43PM +0100, Ondřej Kunc wrote: >> Hi list, >> >> Is there any function in libvirt to determine runlevel of host or >> any possibility to prevent VM migrations to that host ? >> >> I'm developing simple cluster of 4 servers running KVM VMs. For >> management I decided to use py...

...her servers with core2 duo processor (only dualcore) and there this problem never appeared. I've saved a core-dump of affected domU, but it's really big(1,1GB), so I'll not attach it to bugreport, but it is available for debugging. Thanks for potential interest in debugging. Ond?ej Kunc -- System Information: Debian Release: 5.0.4 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 2.6.26-2-xen-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash xen-hypervis...

...I had catched one domU crash and taken tracedumps from xen vcpus, see attachment. Hope it could help. Today I've got some problems with clocksource so I've upgraded to last 2.6.26-xen-amd64 kernel from security so I'll confirm if problem occurs there or not in some days. -- Ond?ej Kunc ---------------------------------------------------------------------- spr?vce serverov? farmy CZOL media s.r.o. Na Mor?ni 5357, Chomutov 43001 E-mail: ondra at czol.eu URL: www.czol.eu www.cz-hosting.com SIP: triak at ekiga.net Jabber: triak at jabber.cz -------------- next part --------------...

Hi, Now I must confirm that bug is present in latest kernel from security updates. One domU locked about one minute after start. -- Ond?ej Kunc spr?vce serverov? farmy CZOL media interactive s.r.o. S?dlo: Moul?kova 2238/1, Praha 5, 15000 Kancel??e: Na Mor?ni 5357, Chomutov, 43001 Telefon: +420 723 137 981 E-mail: ondra at czol.eu URL: www.czol.eu, www.cz-hosting.com

...I changed kernel only for domUs to 2.6.18-6-amd64. With this configuration server crashed after ten minutes. It was totally frozen so I had to restore previous state, but now I don't know what to do now. It's production environment so I need to run in without interruptions. -- Ond?ej Kunc spr?vce serverov? farmy CZOL media interactive s.r.o. S?dlo: Moul?kova 2238/1, Praha 5, 15000 Kancel??e: Na Mor?ni 5357, Chomutov, 43001 Telefon: +420 723 137 981 E-mail: ondra at czol.eu URL: www.czol.eu, www.cz-hosting.com

On Mon, Dec 09, 2013 at 01:01:43PM +0100, Ondřej Kunc wrote: > Hi list, > > Is there any function in libvirt to determine runlevel of host or > any possibility to prevent VM migrations to that host ? > > I'm developing simple cluster of 4 servers running KVM VMs. For > management I decided to use python-libvirt. It is workin...