Oops, I did read it wrong, you are performing LM from westmere to
broadwell.

** Changed in: nova
       Status: Invalid => New

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https://bugs.launchpad.net/bugs/1677426

Title:
  Live Migration fails as different cpu types

Status in OpenStack Compute (nova):
  New

Bug description:
  I'm trying to live migration from systen with Westmere to system with
  Broadwell but fails

  Additional info:
  operating system: centos 7.3
  openstack: Ocata

  /etc/nova/nova.conf 
  cpu_mode=none
  cpu_model=none
  virt_type=kvm

  Error report:
  *********************************************
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server 
[req-98ec383e-d18d-4e79-89e9-725a7e244ce5 - - - - -] Exception during message 
handling
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server Traceback (most 
recent call last):
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 155, in 
_process_incoming
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     res = 
self.dispatcher.dispatch(message)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 222, 
in dispatch
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     return 
self._do_dispatch(endpoint, method, ctxt, args)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 192, 
in _do_dispatch
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     result = 
func(ctxt, **new_args)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/exception_wrapper.py", line 75, in 
wrapped
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
function_name, call_dict, binary)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
self.force_reraise()
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in 
force_reraise
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
six.reraise(self.type_, self.value, self.tb)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/exception_wrapper.py", line 66, in 
wrapped
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     return 
f(self, context, *args, **kw)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/compute/utils.py", line 685, in 
decorated_function
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     return 
function(self, context, *args, **kwargs)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 216, in 
decorated_function
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
kwargs['instance'], e, sys.exc_info())
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
self.force_reraise()
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in 
force_reraise
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
six.reraise(self.type_, self.value, self.tb)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 204, in 
decorated_function
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     return 
function(self, context, *args, **kwargs)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 5213, in 
check_can_live_migrate_destination
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
disk_over_commit)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 5224, in 
_do_check_can_live_migrate_destination
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
block_migration, disk_over_commit)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5655, in 
check_can_live_migrate_destination
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     
self._compare_cpu(None, source_cpu_info, instance)
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5923, in 
_compare_cpu
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server     raise 
exception.InvalidCPUInfo(reason=m % {'ret': ret, 'u': u})
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server InvalidCPUInfo: 
Unacceptable CPU info: CPU doesn't have compatibility.
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server 0
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server Refer to 
http://libvirt.org/html/libvirt-libvirt-host.html#virCPUCompareResult
  2017-03-29 20:31:44.979 4051 ERROR oslo_messaging.rpc.server

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