31ab90f5ff
Blueprint: pipeline-publisher-url Change-Id: I6c912406e0e129b7e2523c40c2678e8b5e5c1df2 Signed-off-by: Julien Danjou <julien@danjou.info>
140 lines
4.4 KiB
Python
140 lines
4.4 KiB
Python
# -*- encoding: utf-8 -*-
|
|
#
|
|
# Copyright © 2012 New Dream Network, LLC (DreamHost)
|
|
#
|
|
# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
|
|
#
|
|
# 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 counter using the preferred RPC mechanism.
|
|
"""
|
|
|
|
import hashlib
|
|
import hmac
|
|
import itertools
|
|
import uuid
|
|
|
|
from oslo.config import cfg
|
|
|
|
from ceilometer.openstack.common import log
|
|
from ceilometer.openstack.common import rpc
|
|
from ceilometer import publisher
|
|
from ceilometer import utils
|
|
|
|
|
|
LOG = log.getLogger(__name__)
|
|
|
|
METER_PUBLISH_OPTS = [
|
|
cfg.StrOpt('metering_topic',
|
|
default='metering',
|
|
help='the topic ceilometer uses for metering messages',
|
|
deprecated_group="DEFAULT",
|
|
),
|
|
cfg.StrOpt('metering_secret',
|
|
secret=True,
|
|
default='change this or be hacked',
|
|
help='Secret value for signing metering messages',
|
|
deprecated_group="DEFAULT",
|
|
),
|
|
]
|
|
|
|
|
|
def register_opts(config):
|
|
"""Register the options for publishing metering messages.
|
|
"""
|
|
config.register_opts(METER_PUBLISH_OPTS, group="publisher_rpc")
|
|
|
|
|
|
register_opts(cfg.CONF)
|
|
|
|
|
|
def compute_signature(message, secret):
|
|
"""Return the signature for a message dictionary.
|
|
"""
|
|
digest_maker = hmac.new(secret, '', hashlib.sha256)
|
|
for name, value in utils.recursive_keypairs(message):
|
|
if name == 'message_signature':
|
|
# Skip any existing signature value, which would not have
|
|
# been part of the original message.
|
|
continue
|
|
digest_maker.update(name)
|
|
digest_maker.update(unicode(value).encode('utf-8'))
|
|
return digest_maker.hexdigest()
|
|
|
|
|
|
def verify_signature(message, secret):
|
|
"""Check the signature in the message against the value computed
|
|
from the rest of the contents.
|
|
"""
|
|
old_sig = message.get('message_signature')
|
|
new_sig = compute_signature(message, secret)
|
|
return new_sig == old_sig
|
|
|
|
|
|
def meter_message_from_counter(counter, secret, source):
|
|
"""Make a metering message ready to be published or stored.
|
|
|
|
Returns a dictionary containing a metering message
|
|
for a notification message and a Counter instance.
|
|
"""
|
|
msg = {'source': source,
|
|
'counter_name': counter.name,
|
|
'counter_type': counter.type,
|
|
'counter_unit': counter.unit,
|
|
'counter_volume': counter.volume,
|
|
'user_id': counter.user_id,
|
|
'project_id': counter.project_id,
|
|
'resource_id': counter.resource_id,
|
|
'timestamp': counter.timestamp,
|
|
'resource_metadata': counter.resource_metadata,
|
|
'message_id': str(uuid.uuid1()),
|
|
}
|
|
msg['message_signature'] = compute_signature(msg, secret)
|
|
return msg
|
|
|
|
|
|
class RPCPublisher(publisher.PublisherBase):
|
|
def publish_counters(self, context, counters, source):
|
|
"""Send a metering message for publishing
|
|
|
|
:param context: Execution context from the service or RPC call
|
|
:param counter: Counter from pipeline after transformation
|
|
:param source: counter source
|
|
"""
|
|
|
|
meters = [
|
|
meter_message_from_counter(
|
|
counter,
|
|
cfg.CONF.publisher_rpc.metering_secret,
|
|
source)
|
|
for counter in counters
|
|
]
|
|
|
|
topic = cfg.CONF.publisher_rpc.metering_topic
|
|
msg = {
|
|
'method': 'record_metering_data',
|
|
'version': '1.0',
|
|
'args': {'data': meters},
|
|
}
|
|
LOG.debug('PUBLISH: %s', str(msg))
|
|
rpc.cast(context, topic, msg)
|
|
|
|
for meter_name, meter_list in itertools.groupby(
|
|
sorted(meters, key=lambda m: m['counter_name']),
|
|
lambda m: m['counter_name']):
|
|
msg = {
|
|
'method': 'record_metering_data',
|
|
'version': '1.0',
|
|
'args': {'data': list(meter_list)},
|
|
}
|
|
rpc.cast(context, topic + '.' + meter_name, msg)
|