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[Bug 1447342] [NEW] libvirtError: XML error: Missing CPU model name lead to compute service fail to start

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Public bug reported:

got following error and failed to start a compute service
not sure if we should disallow compute service to start 
if 'libvirtError: XML error: Missing CPU model name' or not

2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     result = function(*args, **kwargs)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/openstack/common/service.py", line 497, in run_service
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     service.start()
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/service.py", line 164, in start
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     self.manager.init_host()
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/compute/manager.py", line 1258, in init_host
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     self.driver.init_host(host=self.host)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 529, in init_host
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     self._do_quality_warnings()
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 507, in _do_quality_warnings
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     caps = self._host.get_capabilities()
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/virt/libvirt/host.py", line 753, in get_capabilities
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     libvirt.VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 183, in doit
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     result = proxy_call(self._autowrap, f, *args, **kwargs)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in proxy_call
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     rv = execute(f, *args, **kwargs)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     six.reraise(c, e, tb)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     rv = meth(*args, **kwargs)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/libvirt.py", line 3153, in baselineCPU
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     if ret is None: raise libvirtError ('virConnectBaselineCPU() failed', conn=self)
2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup libvirtError: XML error: Missing CPU model name

** Affects: nova
     Importance: Undecided
     Assignee: jichenjc (jichenjc)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => jichenjc (jichenjc)

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https://bugs.launchpad.net/bugs/1447342

Title:
  libvirtError: XML error: Missing CPU model name lead to compute
  service fail to start

Status in OpenStack Compute (Nova):
  New

Bug description:
  got following error and failed to start a compute service
  not sure if we should disallow compute service to start 
  if 'libvirtError: XML error: Missing CPU model name' or not

  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     result = function(*args, **kwargs)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/openstack/common/service.py", line 497, in run_service
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     service.start()
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/service.py", line 164, in start
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     self.manager.init_host()
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/compute/manager.py", line 1258, in init_host
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     self.driver.init_host(host=self.host)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 529, in init_host
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     self._do_quality_warnings()
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 507, in _do_quality_warnings
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     caps = self._host.get_capabilities()
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/virt/libvirt/host.py", line 753, in get_capabilities
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     libvirt.VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 183, in doit
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     result = proxy_call(self._autowrap, f, *args, **kwargs)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in proxy_call
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     rv = execute(f, *args, **kwargs)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     six.reraise(c, e, tb)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     rv = meth(*args, **kwargs)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/libvirt.py", line 3153, in baselineCPU
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup     if ret is None: raise libvirtError ('virConnectBaselineCPU() failed', conn=self)
  2015-04-20 14:06:57.351 TRACE nova.openstack.common.threadgroup libvirtError: XML error: Missing CPU model name

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