[virt-tools-list] KVM Live Migration

[Andrew Cathrow]

----- Original Message -----
> From: "Mike Hall" <MHall at astc.nt.gov.au>
> To: "virt-tools-list at redhat.com" <virt-tools-list at redhat.com>
> Sent: Tuesday, October 5, 2010 7:18:07 PM
> Subject: [virt-tools-list] KVM Live Migration
> We have the following test environment:
> 
> 2 x CentOS 5.5 KVM virtual hosts
> 2 x CentOS 5.5 network storage boxes with NFS shares on LVs on DRBD
> (primary/secondary, no HA, just replication).
> 
> We have installed a Win7 guest which can be live migrated almost
> instantly between hosts using Virt Manager (or virsh). The problem is
> that the guest does not retain its running state after migration, but
> instead arrives on the new host in "reboot after unclean shutdown"
> mode (Windows Error Recovery page on screen), asking how we would like
> to reboot the guest (Safe Mode, normal, etc).
> 

Are the hosts "compatible" ?
eg. what hardware are they running - are there issue with compatibility between then CPUs -eg. does host A have a newer cpu (with newer features) than host b ?


> The migrated machine also loses IP connectivity (static IP) upon
> migration to new host, but regains it on migration back to original
> host.

> 
> So, live migration in this case isn't producing the expected results
> (a running, usable guest).
> Same results using "migrate offline" and pausing the machine before
> migration.
> 
> What could we be doing wrong?
> 
> Michael Hall
> IT Communications Officer
> Alice Springs Town Council
> mhall at astc.nt.gov.au
> (08) 8950 0561
> 
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