[ovirt-users] HE vm fails to migrate due to host CPU incompatibility even after changing cluster CPU type

[Simone Tiraboschi]

On Wed, Mar 8, 2017 at 1:02 PM, Sandro Bonazzola <sbonazzo at redhat.com>
wrote:

>
>
> On Sat, Mar 4, 2017 at 12:04 PM, Stefano Stagnaro <stefanos@
> prismatelecomtesting.com> wrote:
>
>> Hi guys,
>>
>> I've started an oVirt 4.1 HE deployment on a Broadwell based server. Then
>> I added to HE a second, older host based on Nehalem. I've downgraded the
>> cluster CPU type to Nehalem to accommodate host2 and it finally reached
>> score 3400. However, when I try to migrate HE vm it fails with the
>> following error:
>>
>> 2017-03-03 20:19:51,814 ERROR (migsrc/b0d38435) [virt.vm]
>> (vmId='b0d38435-5774-4ca9-ad24-70b57b5bc25d') unsupported configuration:
>> guest and host CPU are not compatible: Host CPU does not provide required
>> features: pclmuldq, fma, pcid, x2apic, movbe, tsc-deadline, aes, xsave,
>> avx, fsgsbase, bmi1, hle, avx2, smep, bmi2, erms, invpcid, rtm, rdseed,
>> adx, smap, 3dnowprefetch; try using 'Broadwell-noTSX' CPU model
>> (migration:265)
>>
>> I believe the problem is in the HE vm XML where the cpu is still
>> configured as Broadwell. how can I change this specific setting without
>> losing the deployment? Please find all the relevant logs at the following
>> link: https://www.dropbox.com/sh/njl9aofhdw10ses/AADf2Ql4GKVIKcbgL
>> ivbmjC2a
>>
>> Besides that, I believe this is a wrong behavior because HE should follow
>> cluster properties (otherwise do not reach score 3400); do you believe is
>> it worth opening a issue on bugzilla?
>>
>
> I would consider opening a BZ to track this. Adding some people who may
> have some insight on the issue.
>

The definition for the engine VM is getting extracted by ovirt-ha-agent
from the OVF_STORE volume, not sure why the engine doesn't update it when
you change cluster properties. I think it's work to fill a bug.
Stefano, did you tried simply changing the number of cores for the engine
VM from the engine to force a configuration update?



>
>
>>
>> Thank you,
>> Stefano.
>>
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>>
>
>
>
> --
> Sandro Bonazzola
> Better technology. Faster innovation. Powered by community collaboration.
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>
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