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[Matt Riedemann <mriedem@xxxxxxxxxx>]

Public bug reported:

Something changed since 1/20 where the
nova.tests.unit.virt.libvirt.test_driver tests would pass if you didn't
have a real libvirt installed but now they fail if you don't have
libvirt installed, e.g.:

    Traceback (most recent call last):
      File "nova/tests/unit/virt/libvirt/test_driver.py", line 4062, in test_xml_and_uri_rescue_no_kernel
        expect_ramdisk=True, rescue=instance_data)
      File "/home/mriedem/git/nova/.tox/py27/local/lib/python2.7/site-packages/mock.py", line 1201, in patched
        return func(*args, **keywargs)
      File "nova/tests/unit/virt/libvirt/test_driver.py", line 5601, in _check_xml_and_uri
        rescue=rescue)
      File "nova/virt/libvirt/driver.py", line 4006, in _get_guest_xml
        context, flavor=flavor)
      File "nova/virt/libvirt/driver.py", line 3819, in _get_guest_config
        instance.numa_topology, flavor, allowed_cpus)
      File "nova/virt/libvirt/driver.py", line 3384, in _get_guest_numa_config
        topology = self._get_host_numa_topology()
      File "nova/virt/libvirt/driver.py", line 4580, in _get_host_numa_topology
        if not self._host.has_min_version(MIN_LIBVIRT_NUMA_TOPOLOGY_VERSION):
      File "nova/virt/libvirt/host.py", line 433, in has_min_version
        conn = self.get_connection()
      File "nova/virt/libvirt/host.py", line 415, in get_connection
        raise exception.HypervisorUnavailable(host=CONF.host)
    HypervisorUnavailable: Connection to the hypervisor is broken on host: fake-mini

I suspect something was missed in this change:

https://github.com/openstack/nova/commit/4b9bec3a1c819e7006af6bfa1de6928bde91b2c7

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: libvirt testing

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https://bugs.launchpad.net/bugs/1414708

Title:
  libvirt unit tests are failing if no real libvirt installed

Status in OpenStack Compute (Nova):
  New

Bug description:
  Something changed since 1/20 where the
  nova.tests.unit.virt.libvirt.test_driver tests would pass if you
  didn't have a real libvirt installed but now they fail if you don't
  have libvirt installed, e.g.:

      Traceback (most recent call last):
        File "nova/tests/unit/virt/libvirt/test_driver.py", line 4062, in test_xml_and_uri_rescue_no_kernel
          expect_ramdisk=True, rescue=instance_data)
        File "/home/mriedem/git/nova/.tox/py27/local/lib/python2.7/site-packages/mock.py", line 1201, in patched
          return func(*args, **keywargs)
        File "nova/tests/unit/virt/libvirt/test_driver.py", line 5601, in _check_xml_and_uri
          rescue=rescue)
        File "nova/virt/libvirt/driver.py", line 4006, in _get_guest_xml
          context, flavor=flavor)
        File "nova/virt/libvirt/driver.py", line 3819, in _get_guest_config
          instance.numa_topology, flavor, allowed_cpus)
        File "nova/virt/libvirt/driver.py", line 3384, in _get_guest_numa_config
          topology = self._get_host_numa_topology()
        File "nova/virt/libvirt/driver.py", line 4580, in _get_host_numa_topology
          if not self._host.has_min_version(MIN_LIBVIRT_NUMA_TOPOLOGY_VERSION):
        File "nova/virt/libvirt/host.py", line 433, in has_min_version
          conn = self.get_connection()
        File "nova/virt/libvirt/host.py", line 415, in get_connection
          raise exception.HypervisorUnavailable(host=CONF.host)
      HypervisorUnavailable: Connection to the hypervisor is broken on host: fake-mini

  I suspect something was missed in this change:

  https://github.com/openstack/nova/commit/4b9bec3a1c819e7006af6bfa1de6928bde91b2c7

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