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

[Stefano Stagnaro]

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/AADf2Ql4GKVIKcbgLivbmjC2a

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?

Thank you,
Stefano.