ff2eaa345e
allow the ability to publish to multiple topics so we can have different consumers for different data. this is done by allowing users to specify a topic for each publisher rather than using the standard CONF option. DocImpact Closes-Bug: #1431922 Change-Id: Ib919cfa302e05653c788ea84a08eafbca4fe843c
230 lines
8.1 KiB
Python
230 lines
8.1 KiB
Python
#
|
|
# Copyright 2012 New Dream Network, LLC (DreamHost)
|
|
#
|
|
# 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.
|
|
"""Publish a sample using the preferred RPC mechanism.
|
|
"""
|
|
|
|
import abc
|
|
import itertools
|
|
import operator
|
|
|
|
import oslo.messaging
|
|
from oslo_config import cfg
|
|
import six
|
|
import six.moves.urllib.parse as urlparse
|
|
|
|
from ceilometer.i18n import _
|
|
from ceilometer import messaging
|
|
from ceilometer.openstack.common import log
|
|
from ceilometer import publisher
|
|
from ceilometer.publisher import utils
|
|
|
|
|
|
LOG = log.getLogger(__name__)
|
|
|
|
RPC_OPTS = [
|
|
cfg.StrOpt('metering_topic',
|
|
default='metering',
|
|
help='The topic that ceilometer uses for metering messages.',
|
|
deprecated_group="DEFAULT",
|
|
),
|
|
]
|
|
|
|
NOTIFIER_OPTS = [
|
|
cfg.StrOpt('metering_topic',
|
|
default='metering',
|
|
help='The topic that ceilometer uses for metering '
|
|
'notifications.',
|
|
),
|
|
cfg.StrOpt('event_topic',
|
|
default='event',
|
|
help='The topic that ceilometer uses for event '
|
|
'notifications.',
|
|
),
|
|
cfg.StrOpt('telemetry_driver',
|
|
default='messagingv2',
|
|
help='The driver that ceilometer uses for metering '
|
|
'notifications.',
|
|
deprecated_name='metering_driver',
|
|
)
|
|
]
|
|
|
|
cfg.CONF.register_opts(RPC_OPTS,
|
|
group="publisher_rpc")
|
|
cfg.CONF.register_opts(NOTIFIER_OPTS,
|
|
group="publisher_notifier")
|
|
cfg.CONF.import_opt('host', 'ceilometer.service')
|
|
|
|
|
|
@six.add_metaclass(abc.ABCMeta)
|
|
class MessagingPublisher(publisher.PublisherBase):
|
|
|
|
def __init__(self, parsed_url):
|
|
options = urlparse.parse_qs(parsed_url.query)
|
|
# the values of the option is a list of url params values
|
|
# only take care of the latest one if the option
|
|
# is provided more than once
|
|
self.per_meter_topic = bool(int(
|
|
options.get('per_meter_topic', [0])[-1]))
|
|
|
|
self.policy = options.get('policy', ['default'])[-1]
|
|
self.max_queue_length = int(options.get(
|
|
'max_queue_length', [1024])[-1])
|
|
|
|
self.local_queue = []
|
|
|
|
if self.policy in ['default', 'queue', 'drop']:
|
|
LOG.info(_('Publishing policy set to %s') % self.policy)
|
|
else:
|
|
LOG.warn(_('Publishing policy is unknown (%s) force to default')
|
|
% self.policy)
|
|
self.policy = 'default'
|
|
|
|
self.retry = 1 if self.policy in ['queue', 'drop'] else None
|
|
|
|
def publish_samples(self, context, samples):
|
|
"""Publish samples on RPC.
|
|
|
|
:param context: Execution context from the service or RPC call.
|
|
:param samples: Samples from pipeline after transformation.
|
|
|
|
"""
|
|
|
|
meters = [
|
|
utils.meter_message_from_counter(
|
|
sample, cfg.CONF.publisher.telemetry_secret)
|
|
for sample in samples
|
|
]
|
|
topic = cfg.CONF.publisher_rpc.metering_topic
|
|
self.local_queue.append((context, topic, meters))
|
|
|
|
if self.per_meter_topic:
|
|
for meter_name, meter_list in itertools.groupby(
|
|
sorted(meters, key=operator.itemgetter('counter_name')),
|
|
operator.itemgetter('counter_name')):
|
|
meter_list = list(meter_list)
|
|
topic_name = topic + '.' + meter_name
|
|
LOG.debug('Publishing %(m)d samples on %(n)s',
|
|
{'m': len(meter_list), 'n': topic_name})
|
|
self.local_queue.append((context, topic_name, meter_list))
|
|
|
|
self.flush()
|
|
|
|
def flush(self):
|
|
# NOTE(sileht):
|
|
# IO of the rpc stuff in handled by eventlet,
|
|
# this is why the self.local_queue, is emptied before processing the
|
|
# queue and the remaining messages in the queue are added to
|
|
# self.local_queue after in case of a other call have already added
|
|
# something in the self.local_queue
|
|
queue = self.local_queue
|
|
self.local_queue = []
|
|
self.local_queue = (self._process_queue(queue, self.policy) +
|
|
self.local_queue)
|
|
if self.policy == 'queue':
|
|
self._check_queue_length()
|
|
|
|
def _check_queue_length(self):
|
|
queue_length = len(self.local_queue)
|
|
if queue_length > self.max_queue_length > 0:
|
|
count = queue_length - self.max_queue_length
|
|
self.local_queue = self.local_queue[count:]
|
|
LOG.warn(_("Publisher max local_queue length is exceeded, "
|
|
"dropping %d oldest samples") % count)
|
|
|
|
def _process_queue(self, queue, policy):
|
|
while queue:
|
|
context, topic, data = queue[0]
|
|
try:
|
|
self._send(context, topic, data)
|
|
except oslo.messaging.MessageDeliveryFailure:
|
|
data = sum([len(m) for __, __, m in queue])
|
|
if policy == 'queue':
|
|
LOG.warn(_("Failed to publish %d datapoints, queue them"),
|
|
data)
|
|
return queue
|
|
elif policy == 'drop':
|
|
LOG.warn(_("Failed to publish %d datapoints, "
|
|
"dropping them"), data)
|
|
return []
|
|
# default, occur only if rabbit_max_retries > 0
|
|
raise
|
|
else:
|
|
queue.pop(0)
|
|
return []
|
|
|
|
def publish_events(self, context, events):
|
|
"""Send an event message for publishing
|
|
|
|
:param context: Execution context from the service or RPC call
|
|
:param events: events from pipeline after transformation
|
|
"""
|
|
ev_list = [utils.message_from_event(
|
|
event, cfg.CONF.publisher.telemetry_secret) for event in events]
|
|
|
|
topic = cfg.CONF.publisher_notifier.event_topic
|
|
self.local_queue.append((context, topic, ev_list))
|
|
self.flush()
|
|
|
|
@abc.abstractmethod
|
|
def _send(self, context, topic, meters):
|
|
"""Send the meters to the messaging topic."""
|
|
|
|
|
|
class RPCPublisher(MessagingPublisher):
|
|
def __init__(self, parsed_url):
|
|
super(RPCPublisher, self).__init__(parsed_url)
|
|
|
|
options = urlparse.parse_qs(parsed_url.query)
|
|
self.target = options.get('target', ['record_metering_data'])[0]
|
|
|
|
self.rpc_client = messaging.get_rpc_client(
|
|
messaging.get_transport(),
|
|
retry=self.retry, version='1.0'
|
|
)
|
|
|
|
def _send(self, context, topic, meters):
|
|
self.rpc_client.prepare(topic=topic).cast(context, self.target,
|
|
data=meters)
|
|
|
|
|
|
class NotifierPublisher(MessagingPublisher):
|
|
def __init__(self, parsed_url, default_topic):
|
|
super(NotifierPublisher, self).__init__(parsed_url)
|
|
options = urlparse.parse_qs(parsed_url.query)
|
|
topic = options.get('topic', [default_topic])[-1]
|
|
self.notifier = oslo.messaging.Notifier(
|
|
messaging.get_transport(),
|
|
driver=cfg.CONF.publisher_notifier.telemetry_driver,
|
|
publisher_id='telemetry.publisher.%s' % cfg.CONF.host,
|
|
topic=topic,
|
|
retry=self.retry
|
|
)
|
|
|
|
def _send(self, context, event_type, data):
|
|
self.notifier.sample(context.to_dict(), event_type=event_type,
|
|
payload=data)
|
|
|
|
|
|
class SampleNotifierPublisher(NotifierPublisher):
|
|
def __init__(self, parsed_url):
|
|
super(SampleNotifierPublisher, self).__init__(
|
|
parsed_url, cfg.CONF.publisher_notifier.metering_topic)
|
|
|
|
|
|
class EventNotifierPublisher(NotifierPublisher):
|
|
def __init__(self, parsed_url):
|
|
super(EventNotifierPublisher, self).__init__(
|
|
parsed_url, cfg.CONF.publisher_notifier.event_topic)
|