Source code for ceilometer.notification

#
# Copyright 2012-2013 eNovance <licensing@enovance.com>
#
# Author: Julien Danjou <julien@danjou.info>
#
# 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 oslo.config import cfg
from stevedore import extension

from ceilometer.event import endpoint as event_endpoint
from ceilometer import messaging
from ceilometer.openstack.common.gettextutils import _
from ceilometer.openstack.common import log
from ceilometer.openstack.common import service as os_service
from ceilometer import pipeline


LOG = log.getLogger(__name__)


OPTS = [
    cfg.BoolOpt('ack_on_event_error',
                default=True,
                deprecated_group='collector',
                help='Acknowledge message when event persistence fails.'),
    cfg.BoolOpt('store_events',
                deprecated_group='collector',
                default=False,
                help='Save event details.'),
    cfg.MultiStrOpt('messaging_urls',
                    default=[],
                    help="Messaging URLs to listen for notifications. "
                         "Example: transport://user:pass@host1:port"
                         "[,hostN:portN]/virtual_host "
                         "(DEFAULT/transport_url is used if empty)"),
]

cfg.CONF.register_opts(OPTS, group="notification")


[docs]class NotificationService(os_service.Service): NOTIFICATION_NAMESPACE = 'ceilometer.notification' @classmethod def _get_notifications_manager(cls, pm): return extension.ExtensionManager( namespace=cls.NOTIFICATION_NAMESPACE, invoke_on_load=True, invoke_args=(pm, ) )
[docs] def start(self): super(NotificationService, self).start() # FIXME(sileht): endpoint use notification_topics option # and it should not because this is oslo.messaging option # not a ceilometer, until we have a something to get # the notification_topics in an other way # we must create a transport to ensure the option have # beeen registered by oslo.messaging transport = messaging.get_transport() messaging.get_notifier(transport, '') self.pipeline_manager = pipeline.setup_pipeline() self.notification_manager = self._get_notifications_manager( self.pipeline_manager) if not list(self.notification_manager): LOG.warning(_('Failed to load any notification handlers for %s'), self.NOTIFICATION_NAMESPACE) ack_on_error = cfg.CONF.notification.ack_on_event_error endpoints = [] if cfg.CONF.notification.store_events: endpoints = [event_endpoint.EventsNotificationEndpoint()] targets = [] for ext in self.notification_manager: handler = ext.obj LOG.debug(_('Event types from %(name)s: %(type)s' ' (ack_on_error=%(error)s)') % {'name': ext.name, 'type': ', '.join(handler.event_types), 'error': ack_on_error}) # NOTE(gordc): this could be a set check but oslo.messaging issue # https://bugs.launchpad.net/oslo.messaging/+bug/1398511 # This ensures we don't create multiple duplicate consumers. for new_tar in handler.get_targets(cfg.CONF): if new_tar not in targets: targets.append(new_tar) endpoints.append(handler) urls = cfg.CONF.notification.messaging_urls or [None] self.listeners = [] for url in urls: transport = messaging.get_transport(url) listener = messaging.get_notification_listener( transport, targets, endpoints) listener.start() self.listeners.append(listener) # Add a dummy thread to have wait() working self.tg.add_timer(604800, lambda: None)
[docs] def stop(self): map(lambda x: x.stop(), self.listeners) super(NotificationService, self).stop()