# Copyright (c) 2014 OpenStack Foundation. # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. from keystoneauth1 import loading as ks_loading from neutron_lib import constants from novaclient import client as nova_client from novaclient import exceptions as nova_exceptions from oslo_config import cfg from oslo_log import log as logging from oslo_utils import uuidutils from sqlalchemy.orm import attributes as sql_attr from neutron._i18n import _LE, _LI, _LW from neutron import context from neutron import manager from neutron.notifiers import batch_notifier LOG = logging.getLogger(__name__) VIF_UNPLUGGED = 'network-vif-unplugged' VIF_PLUGGED = 'network-vif-plugged' VIF_DELETED = 'network-vif-deleted' NEUTRON_NOVA_EVENT_STATUS_MAP = {constants.PORT_STATUS_ACTIVE: 'completed', constants.PORT_STATUS_ERROR: 'failed', constants.PORT_STATUS_DOWN: 'completed'} NOVA_API_VERSION = "2" class Notifier(object): def __init__(self): # FIXME(jamielennox): A notifier is being created for each Controller # and each Notifier is handling it's own auth. That means that we are # authenticating the exact same thing len(controllers) times. This # should be an easy thing to optimize. # FIXME(kevinbenton): remove this comment and the one above once the # switch to pecan is complete since only one notifier is constructed # in the pecan notification hook. auth = ks_loading.load_auth_from_conf_options(cfg.CONF, 'nova') session = ks_loading.load_session_from_conf_options( cfg.CONF, 'nova', auth=auth) extensions = [ ext for ext in nova_client.discover_extensions(NOVA_API_VERSION) if ext.name == "server_external_events"] self.nclient = nova_client.Client( NOVA_API_VERSION, session=session, region_name=cfg.CONF.nova.region_name, endpoint_type=cfg.CONF.nova.endpoint_type, extensions=extensions) self.batch_notifier = batch_notifier.BatchNotifier( cfg.CONF.send_events_interval, self.send_events) def _is_compute_port(self, port): try: if (port['device_id'] and uuidutils.is_uuid_like(port['device_id']) and port['device_owner'].startswith( constants.DEVICE_OWNER_COMPUTE_PREFIX)): return True except (KeyError, AttributeError): pass return False def _get_network_changed_event(self, device_id): return {'name': 'network-changed', 'server_uuid': device_id} def _get_port_delete_event(self, port): return {'server_uuid': port['device_id'], 'name': VIF_DELETED, 'tag': port['id']} @property def _plugin(self): # NOTE(arosen): this cannot be set in __init__ currently since # this class is initialized at the same time as NeutronManager() # which is decorated with synchronized() if not hasattr(self, '_plugin_ref'): self._plugin_ref = manager.NeutronManager.get_plugin() return self._plugin_ref def send_network_change(self, action, original_obj, returned_obj): """Called when a network change is made that nova cares about. :param action: the event that occurred. :param original_obj: the previous value of resource before action. :param returned_obj: the body returned to client as result of action. """ if not cfg.CONF.notify_nova_on_port_data_changes: return # When neutron re-assigns floating ip from an original instance # port to a new instance port without disassociate it first, an # event should be sent for original instance, that will make nova # know original instance's info, and update database for it. if (action == 'update_floatingip' and returned_obj['floatingip'].get('port_id') and original_obj.get('port_id')): disassociate_returned_obj = {'floatingip': {'port_id': None}} event = self.create_port_changed_event(action, original_obj, disassociate_returned_obj) self.batch_notifier.queue_event(event) event = self.create_port_changed_event(action, original_obj, returned_obj) self.batch_notifier.queue_event(event) def create_port_changed_event(self, action, original_obj, returned_obj): port = None if action in ['update_port', 'delete_port']: port = returned_obj['port'] elif action in ['update_floatingip', 'create_floatingip', 'delete_floatingip']: # NOTE(arosen) if we are associating a floatingip the # port_id is in the returned_obj. Otherwise on disassociate # it's in the original_object port_id = (returned_obj['floatingip'].get('port_id') or original_obj.get('port_id')) if port_id is None: return ctx = context.get_admin_context() port = self._plugin.get_port(ctx, port_id) if port and self._is_compute_port(port): if action == 'delete_port': return self._get_port_delete_event(port) else: return self._get_network_changed_event(port['device_id']) def record_port_status_changed(self, port, current_port_status, previous_port_status, initiator): """Determine if nova needs to be notified due to port status change. """ # clear out previous _notify_event port._notify_event = None # If there is no device_id set there is nothing we can do here. if not port.device_id: LOG.debug("device_id is not set on port yet.") return if not port.id: LOG.warning(_LW("Port ID not set! Nova will not be notified of " "port status change.")) return # We only want to notify about nova ports. if not self._is_compute_port(port): return # We notify nova when a vif is unplugged which only occurs when # the status goes from ACTIVE to DOWN. if (previous_port_status == constants.PORT_STATUS_ACTIVE and current_port_status == constants.PORT_STATUS_DOWN): event_name = VIF_UNPLUGGED # We only notify nova when a vif is plugged which only occurs # when the status goes from: # NO_VALUE/DOWN/BUILD -> ACTIVE/ERROR. elif (previous_port_status in [sql_attr.NO_VALUE, constants.PORT_STATUS_DOWN, constants.PORT_STATUS_BUILD] and current_port_status in [constants.PORT_STATUS_ACTIVE, constants.PORT_STATUS_ERROR]): event_name = VIF_PLUGGED # All the remaining state transitions are of no interest to nova else: LOG.debug("Ignoring state change previous_port_status: " "%(pre_status)s current_port_status: %(cur_status)s" " port_id %(id)s", {'pre_status': previous_port_status, 'cur_status': current_port_status, 'id': port.id}) return port._notify_event = ( {'server_uuid': port.device_id, 'name': event_name, 'status': NEUTRON_NOVA_EVENT_STATUS_MAP.get(current_port_status), 'tag': port.id}) def send_port_status(self, mapper, connection, port): event = getattr(port, "_notify_event", None) self.batch_notifier.queue_event(event) port._notify_event = None def send_events(self, batched_events): LOG.debug("Sending events: %s", batched_events) try: response = self.nclient.server_external_events.create( batched_events) except nova_exceptions.NotFound: LOG.debug("Nova returned NotFound for event: %s", batched_events) except Exception: LOG.exception(_LE("Failed to notify nova on events: %s"), batched_events) else: if not isinstance(response, list): LOG.error(_LE("Error response returned from nova: %s"), response) return response_error = False for event in response: try: code = event['code'] except KeyError: response_error = True continue if code != 200: LOG.warning(_LW("Nova event: %s returned with failed " "status"), event) else: LOG.info(_LI("Nova event response: %s"), event) if response_error: LOG.error(_LE("Error response returned from nova: %s"), response)