def given_element(self, uuid='some_uuid', **kwargs): return ovsdb_topology.OvsdbNetworkTopologyElement(uuid=uuid, **kwargs)
def bind_port(self, port_context): """Set binding for a valid segment """ host_name = port_context.host elements = list() try: # Append to empty list to add as much elements as possible # in the case it raises an exception elements.extend(self._fetch_elements_by_host(host_name)) except Exception: LOG.exception( _LE('Error fetching elements for host %(host_name)r.'), {'host_name': host_name}, exc_info=1) if not elements: # In case it wasn't able to find any network topology element # for given host then it uses the legacy OVS one keeping the old # behaviour LOG.warning( _LW('Using legacy OVS network topology element for port ' 'binding for host: %(host_name)r.'), {'host_name': host_name}) # Imported here to avoid cyclic module dependencies from networking_odl.ml2 import ovsdb_topology elements = [ovsdb_topology.OvsdbNetworkTopologyElement()] # TODO(Federico Ressi): in the case there are more candidate virtual # switches instances for the same host it choses one for binding # port. As there isn't any know way to perform this selection it # selects a VIF type that is valid for all switches that have # been found and a VIF type valid for all them. This has to be improved for vif_type in self.valid_vif_types: vif_type_is_valid_for_all = True for element in elements: if vif_type not in element.valid_vif_types: # it is invalid for at least one element: discard it vif_type_is_valid_for_all = False break if vif_type_is_valid_for_all: # This is the best VIF type valid for all elements LOG.debug( "Found VIF type %(vif_type)r valid for all network " "topology elements for host %(host_name)r.", { 'vif_type': vif_type, 'host_name': host_name }) for element in elements: # It assumes that any element could be good for given host # In most of the cases I expect exactely one element for # every compute host try: return element.bind_port(port_context, vif_type, self._vif_details) except Exception: LOG.exception( _LE('Network topology element has failed binding ' 'port:\n%(element)s'), {'element': element.to_json()}) LOG.error( _LE('Unable to bind port element for given host and valid VIF ' 'types:\n' '\thostname: %(host_name)s\n' '\tvalid VIF types: %(valid_vif_types)s'), { 'host_name': host_name, 'valid_vif_types': ', '.join(self.valid_vif_types) })