lxc: libvirt error due to use of dom.vcpus()

[Scott Moser]

running a devstack with with LIBVIRT_TYPE=lxc and nova at:
  commit f597dc5548d66530e68ff5809ac2c56b7edbc6d8
  Merge: c979656 724e5e7
  Date: Tue Dec 13 18:05:39 2011 +0000

I ran a couple instances, killed some, and eventually saw this in nova compute log:

2011-12-13 21:13:41,875 DEBUG nova.virt.libvirt_conn [43af388f-bc82-4ad9-b4d5-7dfa1c0263fc None None] Updating host stats from (pid=5839) update_status /opt/stack/nova/nova/virt/libvirt/connection.py:1913
libvir: error : this function is not supported by the connection driver: virDomainGetVcpus
2011-12-13 21:13:41,881 ERROR nova.manager [43af388f-bc82-4ad9-b4d5-7dfa1c0263fc None None] Error during ComputeManager._report_driver_status: 'NoneType' object has no attribute '__getitem__'
(nova.manager): TRACE: Traceback (most recent call last):
(nova.manager): TRACE: File "/opt/stack/nova/nova/manager.py", line 154, in periodic_tasks
(nova.manager): TRACE: task(self, context)
(nova.manager): TRACE: File "/opt/stack/nova/nova/compute/manager.py", line 1896, in _report_driver_status
(nova.manager): TRACE: self.driver.get_host_stats(refresh=True))
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1883, in get_host_stats
(nova.manager): TRACE: return self.host_state.get_host_stats(refresh=refresh)
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1908, in get_host_stats
(nova.manager): TRACE: self.update_status()
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1918, in update_status
(nova.manager): TRACE: data["vcpus_used"] = self.connection.get_vcpu_used()
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1357, in get_vcpu_used
(nova.manager): TRACE: total += len(dom.vcpus()[1])
(nova.manager): TRACE: TypeError: 'NoneType' object has no attribute '__getitem__'
(nova.manager): TRACE:

and also:
2011-12-13 21:15:42,029 DEBUG nova.virt.libvirt_conn [d3c67c9b-08db-4238-9dde-7fa0e81bf6e4 None None] Updating host stats from (pid=5839) update_status /opt/stack/nova/nova/virt/libvirt/connection.py:1913
libvir: error : this function is not supported by the connection driver: virDomainGetVcpus
2011-12-13 21:15:42,033 ERROR nova.manager [d3c67c9b-08db-4238-9dde-7fa0e81bf6e4 None None] Error during ComputeManager._report_driver_status: 'NoneType' object has no attribute '__getitem__'
(nova.manager): TRACE: Traceback (most recent call last):
(nova.manager): TRACE: File "/opt/stack/nova/nova/manager.py", line 154, in periodic_tasks
(nova.manager): TRACE: task(self, context)
(nova.manager): TRACE: File "/opt/stack/nova/nova/compute/manager.py", line 1896, in _report_driver_status
(nova.manager): TRACE: self.driver.get_host_stats(refresh=True))
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1883, in get_host_stats
(nova.manager): TRACE: return self.host_state.get_host_stats(refresh=refresh)
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1908, in get_host_stats
(nova.manager): TRACE: self.update_status()
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1918, in update_status
(nova.manager): TRACE: data["vcpus_used"] = self.connection.get_vcpu_used()
(nova.manager): TRACE: File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 1357, in get_vcpu_used
(nova.manager): TRACE: total += len(dom.vcpus()[1])
(nova.manager): TRACE: TypeError: 'NoneType' object has no attribute '__getitem__'
(nova.manager): TRACE:

[Openstack Gerrit (openstack-gerrit)]

Reviewed: https://review.openstack.org/2305
Committed: http://github.com/openstack/nova/commit/f4368e5cdf286d065742e0da1977a3e48c091123
Submitter: Jenkins
Branch: master

 status fixcommitted
 done

commit f4368e5cdf286d065742e0da1977a3e48c091123
Author: Scott Moser <email address hidden>
Date: Tue Dec 13 16:48:05 2011 -0500

    avoid error and trace on dom.vcpus() in lxc

    This fixes bug 903943. If you used lxc, you'd eventually
    see stack traces in nova-compute due to use of dom.vcpus().

    Change-Id: I8ff4e973d33eef3df116feb237b2febc8e6a59b5

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/diablo
Review: https://review.openstack.org/2802

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/2802
Committed: http://github.com/openstack/nova/commit/abea7aac12704dcd0bc337e03f4e47a8ec189df8
Submitter: Jenkins
Branch: stable/diablo

commit abea7aac12704dcd0bc337e03f4e47a8ec189df8
Author: Scott Moser <email address hidden>
Date: Tue Dec 13 16:48:05 2011 -0500

    avoid error and trace on dom.vcpus() in lxc

    This fixes bug 903943. If you used lxc, you'd eventually
    see stack traces in nova-compute due to use of dom.vcpus().

    Change-Id: I8ff4e973d33eef3df116feb237b2febc8e6a59b5

[Chuck Short (zulcss)]

libvir: error : this function is not supported by the connection driver: virDomainGetVcpus
2013-01-27 08:24:50.832 ERROR nova.manager [-] Error during ComputeManager._report_driver_status: this function is not supported by the connection driver: virDomainGetVcpus
2013-01-27 08:24:50.832 TRACE nova.manager Traceback (most recent call last):
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/manager.py", line 230, in periodic_tasks
2013-01-27 08:24:50.832 TRACE nova.manager task(self, context)
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/compute/manager.py", line 3275, in _report_driver_status
2013-01-27 08:24:50.832 TRACE nova.manager capabilities = self.driver.get_host_stats(refresh=True)
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2925, in get_host_stats
2013-01-27 08:24:50.832 TRACE nova.manager return self.host_state.get_host_stats(refresh=refresh)
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 3198, in get_host_stats
2013-01-27 08:24:50.832 TRACE nova.manager self.update_status()
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 3208, in update_status
2013-01-27 08:24:50.832 TRACE nova.manager data["vcpus_used"] = self.connection.get_vcpu_used()
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2109, in get_vcpu_used
2013-01-27 08:24:50.832 TRACE nova.manager vcpus = dom.vcpus()
2013-01-27 08:24:50.832 TRACE nova.manager File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 187, in doit
2013-01-27 08:24:50.832 TRACE nova.manager result = proxy_call(self._autowrap, f, *args, **kwargs)
2013-01-27 08:24:50.832 TRACE nova.manager File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 147, in proxy_call
2013-01-27 08:24:50.832 TRACE nova.manager rv = execute(f,*args,**kwargs)
2013-01-27 08:24:50.832 TRACE nova.manager File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 76, in tworker
2013-01-27 08:24:50.832 TRACE nova.manager rv = meth(*args,**kwargs)
2013-01-27 08:24:50.832 TRACE nova.manager File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2087, in vcpus
2013-01-27 08:24:50.832 TRACE nova.manager if ret == -1: raise libvirtError ('virDomainGetVcpus() failed', dom=self)
2013-01-27 08:24:50.832 TRACE nova.manager libvirtError: this function is not supported by the connection driver: virDomainGetVcpus
2013-01-27 08:24:50.832 TRACE nova.manager
ERROR:nova.manager:Error during ComputeManager._report_driver_status: this function is not supported by the connection driver: virDomainGetVcpus
2013-01-27 08:24:50.832 TRACE nova.manager Traceback (most recent call last):
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/manager.py", line 230, in periodic_tasks
2013-01-27 08:24:50.832 TRACE nova.manager task(self, context)
2013-01-27 08:24:50.832 TRACE nova.manager File "/opt/stack/nova/nova/compute/manager.py", line 3275, in _report_driver_status
20...