234 lines
9.5 KiB
Python
234 lines
9.5 KiB
Python
# Copyright (c) 2014 OpenStack Foundation.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from keystoneclient import auth as ks_auth
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from keystoneclient import session as ks_session
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from novaclient import client as nova_client
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from novaclient import exceptions as nova_exceptions
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_utils import uuidutils
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from sqlalchemy.orm import attributes as sql_attr
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from neutron.common import constants
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from neutron import context
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from neutron.i18n import _LE, _LI, _LW
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from neutron import manager
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from neutron.notifiers import batch_notifier
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LOG = logging.getLogger(__name__)
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VIF_UNPLUGGED = 'network-vif-unplugged'
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VIF_PLUGGED = 'network-vif-plugged'
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VIF_DELETED = 'network-vif-deleted'
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NEUTRON_NOVA_EVENT_STATUS_MAP = {constants.PORT_STATUS_ACTIVE: 'completed',
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constants.PORT_STATUS_ERROR: 'failed',
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constants.PORT_STATUS_DOWN: 'completed'}
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NOVA_API_VERSION = "2"
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class Notifier(object):
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def __init__(self):
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# FIXME(jamielennox): A notifier is being created for each Controller
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# and each Notifier is handling it's own auth. That means that we are
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# authenticating the exact same thing len(controllers) times. This
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# should be an easy thing to optimize.
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auth = ks_auth.load_from_conf_options(cfg.CONF, 'nova')
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session = ks_session.Session.load_from_conf_options(cfg.CONF,
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'nova',
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auth=auth)
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extensions = [
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ext for ext in nova_client.discover_extensions(NOVA_API_VERSION)
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if ext.name == "server_external_events"]
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self.nclient = nova_client.Client(
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NOVA_API_VERSION,
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session=session,
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region_name=cfg.CONF.nova.region_name,
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extensions=extensions)
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self.batch_notifier = batch_notifier.BatchNotifier(
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cfg.CONF.send_events_interval, self.send_events)
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def _is_compute_port(self, port):
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try:
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if (port['device_id'] and uuidutils.is_uuid_like(port['device_id'])
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and port['device_owner'].startswith('compute:')):
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return True
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except (KeyError, AttributeError):
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pass
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return False
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def _get_network_changed_event(self, device_id):
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return {'name': 'network-changed',
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'server_uuid': device_id}
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def _get_port_delete_event(self, port):
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return {'server_uuid': port['device_id'],
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'name': VIF_DELETED,
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'tag': port['id']}
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@property
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def _plugin(self):
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# NOTE(arosen): this cannot be set in __init__ currently since
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# this class is initialized at the same time as NeutronManager()
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# which is decorated with synchronized()
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if not hasattr(self, '_plugin_ref'):
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self._plugin_ref = manager.NeutronManager.get_plugin()
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return self._plugin_ref
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def send_network_change(self, action, original_obj,
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returned_obj):
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"""Called when a network change is made that nova cares about.
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:param action: the event that occurred.
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:param original_obj: the previous value of resource before action.
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:param returned_obj: the body returned to client as result of action.
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"""
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if not cfg.CONF.notify_nova_on_port_data_changes:
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return
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# When neutron re-assigns floating ip from an original instance
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# port to a new instance port without disassociate it first, an
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# event should be sent for original instance, that will make nova
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# know original instance's info, and update database for it.
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if (action == 'update_floatingip'
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and returned_obj['floatingip'].get('port_id')
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and original_obj.get('port_id')):
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disassociate_returned_obj = {'floatingip': {'port_id': None}}
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event = self.create_port_changed_event(action, original_obj,
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disassociate_returned_obj)
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self.batch_notifier.queue_event(event)
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event = self.create_port_changed_event(action, original_obj,
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returned_obj)
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self.batch_notifier.queue_event(event)
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def create_port_changed_event(self, action, original_obj, returned_obj):
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port = None
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if action in ['update_port', 'delete_port']:
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port = returned_obj['port']
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elif action in ['update_floatingip', 'create_floatingip',
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'delete_floatingip']:
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# NOTE(arosen) if we are associating a floatingip the
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# port_id is in the returned_obj. Otherwise on disassociate
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# it's in the original_object
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port_id = (returned_obj['floatingip'].get('port_id') or
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original_obj.get('port_id'))
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if port_id is None:
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return
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ctx = context.get_admin_context()
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port = self._plugin.get_port(ctx, port_id)
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if port and self._is_compute_port(port):
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if action == 'delete_port':
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return self._get_port_delete_event(port)
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else:
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return self._get_network_changed_event(port['device_id'])
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def record_port_status_changed(self, port, current_port_status,
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previous_port_status, initiator):
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"""Determine if nova needs to be notified due to port status change.
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"""
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# clear out previous _notify_event
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port._notify_event = None
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# If there is no device_id set there is nothing we can do here.
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if not port.device_id:
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LOG.debug("device_id is not set on port yet.")
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return
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if not port.id:
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LOG.warning(_LW("Port ID not set! Nova will not be notified of "
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"port status change."))
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return
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# We only want to notify about nova ports.
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if not self._is_compute_port(port):
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return
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# We notify nova when a vif is unplugged which only occurs when
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# the status goes from ACTIVE to DOWN.
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if (previous_port_status == constants.PORT_STATUS_ACTIVE and
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current_port_status == constants.PORT_STATUS_DOWN):
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event_name = VIF_UNPLUGGED
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# We only notify nova when a vif is plugged which only occurs
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# when the status goes from:
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# NO_VALUE/DOWN/BUILD -> ACTIVE/ERROR.
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elif (previous_port_status in [sql_attr.NO_VALUE,
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constants.PORT_STATUS_DOWN,
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constants.PORT_STATUS_BUILD]
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and current_port_status in [constants.PORT_STATUS_ACTIVE,
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constants.PORT_STATUS_ERROR]):
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event_name = VIF_PLUGGED
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# All the remaining state transitions are of no interest to nova
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else:
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LOG.debug("Ignoring state change previous_port_status: "
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"%(pre_status)s current_port_status: %(cur_status)s"
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" port_id %(id)s",
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{'pre_status': previous_port_status,
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'cur_status': current_port_status,
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'id': port.id})
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return
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port._notify_event = (
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{'server_uuid': port.device_id,
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'name': event_name,
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'status': NEUTRON_NOVA_EVENT_STATUS_MAP.get(current_port_status),
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'tag': port.id})
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def send_port_status(self, mapper, connection, port):
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event = getattr(port, "_notify_event", None)
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self.batch_notifier.queue_event(event)
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port._notify_event = None
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def send_events(self, batched_events):
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LOG.debug("Sending events: %s", batched_events)
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try:
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response = self.nclient.server_external_events.create(
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batched_events)
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except nova_exceptions.NotFound:
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LOG.warning(_LW("Nova returned NotFound for event: %s"),
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batched_events)
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except Exception:
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LOG.exception(_LE("Failed to notify nova on events: %s"),
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batched_events)
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else:
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if not isinstance(response, list):
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LOG.error(_LE("Error response returned from nova: %s"),
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response)
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return
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response_error = False
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for event in response:
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try:
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code = event['code']
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except KeyError:
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response_error = True
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continue
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if code != 200:
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LOG.warning(_LW("Nova event: %s returned with failed "
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"status"), event)
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else:
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LOG.info(_LI("Nova event response: %s"), event)
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if response_error:
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LOG.error(_LE("Error response returned from nova: %s"),
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response)
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