hyper-v: Logs tips on PortBindingFailed
When spawning an Hyper-V instance with NICs having the vif_type "hyperv", neutron will fail to bind the port to the Hyper-V host if the neutron server doesn't have the "hyperv" mechanism driver installed and configured, resulting in a PortBindingFailed exception on the nova-compute side. When this exception is encountered, the logs will say to check the neutron-server logs, but the problem and its solution are not obvious or clear, resulting in plenty of questions / reports, all having the same solution: is there an L2 agent on the host alive and reporting to neutron, and if neutron Hyper-V agent is used, make sure to install networking-hyperv and configure neutron-server to use the "hyperv" mechanism_driver. Change-Id: Idceeb08e1452413e3b10ecd0a65f71d4d82866e0 Closes-Bug: #1744032
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@ -503,6 +503,18 @@ class VMOpsTestCase(test_base.HyperVBaseTestCase):
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deadline=CONF.vif_plugging_timeout,
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error_callback=self._vmops._neutron_failed_callback)
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@mock.patch.object(vmops.VMOps, '_get_neutron_events')
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def test_wait_vif_plug_events_port_binding_failed(self, mock_get_events):
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mock_get_events.side_effect = exception.PortBindingFailed(
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port_id='fake_id')
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def _context_user():
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with self._vmops.wait_vif_plug_events(mock.sentinel.instance,
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mock.sentinel.network_info):
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pass
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self.assertRaises(exception.PortBindingFailed, _context_user)
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def test_neutron_failed_callback(self):
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self.flags(vif_plugging_is_fatal=True)
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self.assertRaises(exception.VirtualInterfaceCreateException,
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@ -306,9 +306,11 @@ class VMOps(object):
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@contextlib.contextmanager
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def wait_vif_plug_events(self, instance, network_info):
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timeout = CONF.vif_plugging_timeout
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events = self._get_neutron_events(network_info)
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try:
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# NOTE(claudiub): async calls to bind the neutron ports will be
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# done when network_info is being accessed.
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events = self._get_neutron_events(network_info)
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with self._virtapi.wait_for_instance_event(
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instance, events, deadline=timeout,
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error_callback=self._neutron_failed_callback):
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@ -319,6 +321,17 @@ class VMOps(object):
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'instance.', instance=instance)
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if CONF.vif_plugging_is_fatal:
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raise exception.VirtualInterfaceCreateException()
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except exception.PortBindingFailed:
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LOG.warning(
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"Neutron failed to bind a port to this host. Make sure that "
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"an L2 agent is alive and registered from this node (neutron "
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"Open vSwitch agent or Hyper-V agent), or make sure that "
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"neutron is configured with a mechanism driver that is able "
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"to bind ports to this host (OVN). If you are using neutron "
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"Hyper-V agent, make sure that networking-hyperv is installed "
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"on the neutron controller, and that the neutron-server was "
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"configured to use the 'hyperv' mechanism_driver.")
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raise
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def _neutron_failed_callback(self, event_name, instance):
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LOG.error('Neutron Reported failure on event %s',
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