141 lines
5.3 KiB
Python
141 lines
5.3 KiB
Python
#
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# Copyright 2012-2013 eNovance <licensing@enovance.com>
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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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import socket
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import msgpack
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import oslo.messaging
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from oslo_config import cfg
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from oslo_utils import units
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from ceilometer import dispatcher
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from ceilometer import messaging
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from ceilometer.i18n import _, _LE
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from ceilometer.openstack.common import log
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from ceilometer.openstack.common import service as os_service
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OPTS = [
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cfg.StrOpt('udp_address',
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default='0.0.0.0',
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help='Address to which the UDP socket is bound. Set to '
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'an empty string to disable.'),
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cfg.IntOpt('udp_port',
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default=4952,
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help='Port to which the UDP socket is bound.'),
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cfg.BoolOpt('requeue_sample_on_dispatcher_error',
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default=False,
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help='Requeue the sample on the collector sample queue '
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'when the collector fails to dispatch it. This is only valid '
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'if the sample come from the notifier publisher.'),
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]
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cfg.CONF.register_opts(OPTS, group="collector")
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cfg.CONF.import_opt('metering_topic', 'ceilometer.publisher.messaging',
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group="publisher_rpc")
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cfg.CONF.import_opt('metering_topic', 'ceilometer.publisher.messaging',
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group="publisher_notifier")
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LOG = log.getLogger(__name__)
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class CollectorService(os_service.Service):
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"""Listener for the collector service."""
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def start(self):
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"""Bind the UDP socket and handle incoming data."""
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# ensure dispatcher is configured before starting other services
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self.dispatcher_manager = dispatcher.load_dispatcher_manager()
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self.rpc_server = None
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self.notification_server = None
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super(CollectorService, self).start()
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if cfg.CONF.collector.udp_address:
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self.tg.add_thread(self.start_udp)
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allow_requeue = cfg.CONF.collector.requeue_sample_on_dispatcher_error
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transport = messaging.get_transport(optional=True)
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if transport:
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self.rpc_server = messaging.get_rpc_server(
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transport, cfg.CONF.publisher_rpc.metering_topic, self)
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target = oslo.messaging.Target(
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topic=cfg.CONF.publisher_notifier.metering_topic)
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self.notification_server = messaging.get_notification_listener(
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transport, [target], [self],
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allow_requeue=allow_requeue)
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self.rpc_server.start()
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self.notification_server.start()
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if not cfg.CONF.collector.udp_address:
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# Add a dummy thread to have wait() working
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self.tg.add_timer(604800, lambda: None)
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def start_udp(self):
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udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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udp.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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udp.bind((cfg.CONF.collector.udp_address,
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cfg.CONF.collector.udp_port))
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self.udp_run = True
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while self.udp_run:
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# NOTE(jd) Arbitrary limit of 64K because that ought to be
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# enough for anybody.
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data, source = udp.recvfrom(64 * units.Ki)
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try:
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sample = msgpack.loads(data, encoding='utf-8')
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except Exception:
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LOG.warn(_("UDP: Cannot decode data sent by %s"), source)
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else:
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try:
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LOG.debug(_("UDP: Storing %s"), sample)
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self.dispatcher_manager.map_method('record_metering_data',
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sample)
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except Exception:
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LOG.exception(_("UDP: Unable to store meter"))
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def stop(self):
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self.udp_run = False
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if self.rpc_server:
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self.rpc_server.stop()
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if self.notification_server:
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self.notification_server.stop()
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super(CollectorService, self).stop()
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def sample(self, ctxt, publisher_id, event_type, payload, metadata):
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"""RPC endpoint for notification messages
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When another service sends a notification over the message
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bus, this method receives it.
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"""
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try:
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self.dispatcher_manager.map_method('record_metering_data',
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data=payload)
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except Exception:
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if cfg.CONF.collector.requeue_sample_on_dispatcher_error:
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LOG.exception(_LE("Dispatcher failed to handle the sample, "
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"requeue it."))
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return oslo.messaging.NotificationResult.REQUEUE
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raise
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def record_metering_data(self, context, data):
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"""RPC endpoint for messages we send to ourselves.
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When the notification messages are re-published through the
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RPC publisher, this method receives them for processing.
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"""
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self.dispatcher_manager.map_method('record_metering_data', data=data)
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