277 lines
11 KiB
Python
277 lines
11 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 keystoneauth1 import loading as ks_loading
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from neutron_lib.callbacks import events
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from neutron_lib.callbacks import registry
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from neutron_lib.callbacks import resources
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from neutron_lib import constants
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from neutron_lib import context
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from neutron_lib import exceptions as exc
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from neutron_lib.plugins import directory
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from novaclient import api_versions
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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_context import context as common_context
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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.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 = "2.1"
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@registry.has_registry_receivers
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class Notifier(object):
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_instance = None
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@classmethod
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def get_instance(cls):
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if cls._instance is None:
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cls._instance = cls()
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return cls._instance
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def __init__(self):
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auth = ks_loading.load_auth_from_conf_options(cfg.CONF, 'nova')
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self.session = ks_loading.load_session_from_conf_options(
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cfg.CONF,
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'nova',
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auth=auth)
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self.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.batch_notifier = batch_notifier.BatchNotifier(
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cfg.CONF.send_events_interval, self.send_events)
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def _get_nova_client(self):
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global_id = common_context.generate_request_id()
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return nova_client.Client(
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api_versions.APIVersion(NOVA_API_VERSION),
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session=self.session,
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region_name=cfg.CONF.nova.region_name,
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endpoint_type=cfg.CONF.nova.endpoint_type,
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extensions=self.extensions,
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connect_retries=cfg.CONF.http_retries,
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global_request_id=global_id)
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def _is_compute_port(self, port):
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try:
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if (port['device_id'] and
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uuidutils.is_uuid_like(port['device_id']) and
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port['device_owner'].startswith(
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constants.DEVICE_OWNER_COMPUTE_PREFIX)):
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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, port):
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return {'name': 'network-changed',
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'server_uuid': port['device_id'],
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'tag': port['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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@registry.receives(resources.PORT, [events.BEFORE_RESPONSE])
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@registry.receives(resources.FLOATING_IP, [events.BEFORE_RESPONSE])
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def _send_nova_notification(self, resource, event, trigger, payload=None):
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self.send_network_change(payload.action, payload.states[0],
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payload.latest_state)
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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' and
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returned_obj['floatingip'].get('port_id') and
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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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try:
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port = directory.get_plugin().get_port(ctx, port_id)
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except exc.PortNotFound:
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LOG.debug("Port %s was deleted, no need to send any "
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"notification", port_id)
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return
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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)
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def _can_notify(self, port):
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if not port.id:
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LOG.warning("Port ID not set! Nova will not be notified of "
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"port status change.")
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return False
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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 %s yet.", port.id)
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return False
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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 False
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return True
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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 not self._can_notify(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] and
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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 notify_port_active_direct(self, port):
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"""Notify nova about active port
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Used when port was wired on the host other than port's current host
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according to port binding. This happens during live migration.
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In this case ml2 plugin skips port status update but we still we need
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to notify nova.
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"""
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if not self._can_notify(port):
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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': VIF_PLUGGED,
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'status': 'completed',
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'tag': port.id})
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self.send_port_status(None, None, port)
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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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novaclient = self._get_nova_client()
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try:
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response = novaclient.server_external_events.create(
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batched_events)
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except nova_exceptions.NotFound:
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LOG.debug("Nova returned NotFound for event: %s",
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batched_events)
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except Exception:
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LOG.exception("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("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("Nova event: %s returned with failed "
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"status", event)
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else:
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LOG.info("Nova event response: %s", event)
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if response_error:
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LOG.error("Error response returned from nova: %s",
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response)
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