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

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-c... -- Thanks, Matt