Re: [libvirt] libvirt 0.5.0 and KVM migration

On Tue, 2008-12-02 at 09:11 +0100, Chris Lalancette wrote: > Mickaël Canévet wrote: >> Thanks for your quick answer. >> >> I forgot to restart libvirt on one node. >> >> Now I have an other error message: >> >> libvir: QEMU error : operation failed: failed to start listening VM >> >> Is there any kernel limitation also ? will it work with my distro 2.6.26 >> kernel with kvm-79 userspace component or do I have to have kvm-79 >> kernel module also, or even kernel then 2.6.26 ? >> >> In other (debian) words, will an "apt-get update kvm -t >> experimental" (which provides kvm-79) be enough on my lenny (I would >> like to limit unstable or experimental packages) ? > Just an updated kvm-79 userspace *should* work; for instance, in oVirt, we are > running a kvm-79 userspace equivalent on a 2.6.27 kernel, which is slightly > older. In general, a new kvm userspace should work on an older kernel, but it > is not a heavily tested configuration, so your results might vary. > OK, I updated both userspace and kernel module to kvm-79. Now migration begins, but: - On the source node, the command does not returns and an strace shows that it does nothing (wait4(9709, ) - On the destination node, I can connect threw the VNC display, but there seams to have a strange issue with I/O (lot of messages on console; sd 0:0:0:0: rejecting I/O to offline device). FYI my VM disk is a DRBD over LVM as dual primary. - From another PC, I lose a few pings during migration. Are my I/0 errors comes from my backend storage (DRBD) ?