Nova live migration fails - InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility.

Matt Riedemann mriedemos at gmail.com
Thu Dec 13 23:31:02 UTC 2018


On 12/13/2018 4:36 PM, Torin Woltjer wrote:
> Having issues getting live migrations to functions between two compute 
> nodes.
> One is an Opteron G4 and the other is an Opteron G5. I can migrate from 
> the G4 to the G5 just fine. When I try to migrate an instance from the 
> G5 node to the G4 node I get an error message:
> InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility.
> This is despite having the following setting in my /etc/nova/nova.conf 
> on the G5 machine.
> 
> [libvirt]
> cpu_mode = custom
> cpu_model = Opteron_G4
> 
> Is this not the setting I'm looking for? What can I do to make this work?

This summit talk from Kashyap might be helpful:

https://www.openstack.org/videos/summits/berlin-2018/effective-virtual-cpu-configuration-in-nova

-- 

Thanks,

Matt



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