Add TCP publisher
This commit adds a TCP publisher. The publisher works similarly to the UDP publisher. Change-Id: Iac662018039e74ad59ac9c7fa4db994da540ef2f
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jwysogla
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94
ceilometer/publisher/tcp.py
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94
ceilometer/publisher/tcp.py
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#
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# Copyright 2022 Red Hat, Inc
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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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"""Publish a sample using a TCP mechanism
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"""
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import socket
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import msgpack
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from oslo_log import log
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from oslo_utils import netutils
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import ceilometer
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from ceilometer.i18n import _
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from ceilometer import publisher
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from ceilometer.publisher import utils
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LOG = log.getLogger(__name__)
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class TCPPublisher(publisher.ConfigPublisherBase):
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def __init__(self, conf, parsed_url):
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super(TCPPublisher, self).__init__(conf, parsed_url)
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self.host, self.port = netutils.parse_host_port(
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parsed_url.netloc, default_port=4952)
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addrinfo = None
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try:
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addrinfo = socket.getaddrinfo(self.host, None, socket.AF_INET6,
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socket.SOCK_STREAM)[0]
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except socket.gaierror:
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try:
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addrinfo = socket.getaddrinfo(self.host, None, socket.AF_INET,
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socket.SOCK_STREAM)[0]
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except socket.gaierror:
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pass
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if addrinfo:
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self.addr_family = addrinfo[0]
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else:
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LOG.warning(
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"Cannot resolve host %s, creating AF_INET socket...",
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self.host)
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self.addr_family = socket.AF_INET
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self.create_and_connect()
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def create_and_connect(self):
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self.socket = socket.socket(self.addr_family,
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socket.SOCK_STREAM)
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self.socket.connect((self.host, self.port))
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def publish_samples(self, samples):
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"""Send a metering message for publishing
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:param samples: Samples from pipeline after transformation
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"""
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for sample in samples:
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msg = utils.meter_message_from_counter(
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sample, self.conf.publisher.telemetry_secret, self.conf.host)
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host = self.host
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port = self.port
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LOG.debug("Publishing sample %(msg)s over TCP to "
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"%(host)s:%(port)d", {'msg': msg, 'host': host,
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'port': port})
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encoded_msg = msgpack.dumps(msg, use_bin_type=True)
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msg_len = len(encoded_msg).to_bytes(8, 'little')
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try:
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self.socket.send(msg_len + encoded_msg)
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except Exception:
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LOG.warning(_("Unable to send sample over TCP,"
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"trying to reconnect and resend the message"))
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self.create_and_connect()
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try:
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self.socket.send(msg_len + encoded_msg)
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except Exception:
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LOG.exception(_("Unable to reconnect and resend"
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"sample over TCP"))
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def publish_events(self, events):
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"""Send an event message for publishing
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:param events: events from pipeline after transformation
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"""
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raise ceilometer.NotImplementedError
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@ -114,7 +114,7 @@ def verify_signature(message, secret):
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return secretutils.constant_time_compare(new_sig, old_sig)
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def meter_message_from_counter(sample, secret):
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def meter_message_from_counter(sample, secret, publisher_id=None):
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"""Make a metering message ready to be published or stored.
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Returns a dictionary containing a metering message
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@ -135,6 +135,8 @@ def meter_message_from_counter(sample, secret):
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'message_id': sample.id,
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'monotonic_time': sample.monotonic_time,
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}
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if publisher_id is not None:
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msg['publisher_id'] = publisher_id
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msg['message_signature'] = compute_signature(msg, secret)
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return msg
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223
ceilometer/tests/unit/publisher/test_tcp.py
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223
ceilometer/tests/unit/publisher/test_tcp.py
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#
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# Copyright 2022 Red Hat, Inc
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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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"""Tests for ceilometer/publisher/tcp.py"""
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import datetime
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from unittest import mock
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import msgpack
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from oslo_utils import netutils
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from oslotest import base
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from ceilometer.publisher import tcp
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from ceilometer.publisher import utils
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from ceilometer import sample
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from ceilometer import service
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COUNTER_SOURCE = 'testsource'
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class TestTCPPublisher(base.BaseTestCase):
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test_data = [
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sample.Sample(
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name='test',
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type=sample.TYPE_CUMULATIVE,
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unit='',
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volume=1,
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user_id='test',
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project_id='test',
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resource_id='test_run_tasks',
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timestamp=datetime.datetime.utcnow().isoformat(),
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resource_metadata={'name': 'TestPublish'},
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source=COUNTER_SOURCE,
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),
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sample.Sample(
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name='test',
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type=sample.TYPE_CUMULATIVE,
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unit='',
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volume=1,
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user_id='test',
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project_id='test',
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resource_id='test_run_tasks',
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timestamp=datetime.datetime.utcnow().isoformat(),
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resource_metadata={'name': 'TestPublish'},
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source=COUNTER_SOURCE,
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),
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sample.Sample(
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name='test2',
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type=sample.TYPE_CUMULATIVE,
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unit='',
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volume=1,
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user_id='test',
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project_id='test',
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resource_id='test_run_tasks',
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timestamp=datetime.datetime.utcnow().isoformat(),
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resource_metadata={'name': 'TestPublish'},
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source=COUNTER_SOURCE,
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),
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sample.Sample(
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name='test2',
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type=sample.TYPE_CUMULATIVE,
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unit='',
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volume=1,
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user_id='test',
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project_id='test',
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resource_id='test_run_tasks',
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timestamp=datetime.datetime.utcnow().isoformat(),
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resource_metadata={'name': 'TestPublish'},
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source=COUNTER_SOURCE,
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),
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sample.Sample(
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name='test3',
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type=sample.TYPE_CUMULATIVE,
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unit='',
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volume=1,
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user_id='test',
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project_id='test',
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resource_id='test_run_tasks',
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timestamp=datetime.datetime.utcnow().isoformat(),
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resource_metadata={'name': 'TestPublish'},
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source=COUNTER_SOURCE,
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),
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]
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@staticmethod
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def _make_fake_socket(published):
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def _fake_socket_socket(family, type):
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def record_data(msg):
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msg_length = int.from_bytes(msg[0:8], "little")
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published.append(msg[8:msg_length + 8])
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def connect(dst):
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pass
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tcp_socket = mock.Mock()
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tcp_socket.send = record_data
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tcp_socket.connect = connect
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return tcp_socket
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return _fake_socket_socket
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def setUp(self):
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super(TestTCPPublisher, self).setUp()
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self.CONF = service.prepare_service([], [])
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self.CONF.publisher.telemetry_secret = 'not-so-secret'
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def test_published(self):
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self.data_sent = []
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with mock.patch('socket.socket',
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self._make_fake_socket(self.data_sent)):
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publisher = tcp.TCPPublisher(
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self.CONF,
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netutils.urlsplit('tcp://somehost'))
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publisher.publish_samples(self.test_data)
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self.assertEqual(5, len(self.data_sent))
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sent_counters = []
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for data in self.data_sent:
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counter = msgpack.loads(data, raw=False)
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sent_counters.append(counter)
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# Check that counters are equal
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def sort_func(counter):
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return counter['counter_name']
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counters = [utils.meter_message_from_counter(d,
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"not-so-secret",
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publisher.conf.host)
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for d in self.test_data]
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counters.sort(key=sort_func)
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sent_counters.sort(key=sort_func)
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self.assertEqual(counters, sent_counters)
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@staticmethod
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def _make_disconnecting_socket(published, connections):
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def _fake_socket_socket(family, type):
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def record_data(msg):
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if len(published) == len(connections) - 1:
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# Raise for every each first send attempt to
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# trigger a reconnection attempt and send the data
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# correctly after reconnecting
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raise IOError
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msg_length = int.from_bytes(msg[0:8], "little")
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published.append(msg[8:msg_length + 8])
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def record_connection(dest):
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connections.append(dest)
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tcp_socket = mock.Mock()
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tcp_socket.send = record_data
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tcp_socket.connect = record_connection
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return tcp_socket
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return _fake_socket_socket
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def test_reconnect(self):
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self.data_sent = []
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self.connections = []
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with mock.patch('socket.socket',
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self._make_disconnecting_socket(self.data_sent,
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self.connections)):
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publisher = tcp.TCPPublisher(
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self.CONF,
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netutils.urlsplit('tcp://somehost'))
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publisher.publish_samples(self.test_data)
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sent_counters = []
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for data in self.data_sent:
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counter = msgpack.loads(data, raw=False)
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sent_counters.append(counter)
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for connection in self.connections:
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# Check destination
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self.assertEqual(('somehost', 4952), connection)
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self.assertEqual(len(self.connections) - 1, len(self.data_sent))
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# Check that counters are equal
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def sort_func(counter):
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return counter['counter_name']
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counters = [utils.meter_message_from_counter(d,
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"not-so-secret",
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publisher.conf.host)
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for d in self.test_data]
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counters.sort(key=sort_func)
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sent_counters.sort(key=sort_func)
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self.assertEqual(counters, sent_counters)
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@staticmethod
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def _raise_ioerror(*args):
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raise IOError
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def _make_broken_socket(self, family, type):
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def connect(dst):
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pass
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tcp_socket = mock.Mock()
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tcp_socket.send = self._raise_ioerror
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tcp_socket.connect = connect
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return tcp_socket
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def test_publish_error(self):
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with mock.patch('socket.socket',
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self._make_broken_socket):
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publisher = tcp.TCPPublisher(
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self.CONF,
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netutils.urlsplit('tcp://localhost'))
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publisher.publish_samples(self.test_data)
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@ -180,6 +180,7 @@ ceilometer.sample.publisher =
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test = ceilometer.publisher.test:TestPublisher
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notifier = ceilometer.publisher.messaging:SampleNotifierPublisher
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udp = ceilometer.publisher.udp:UDPPublisher
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tcp = ceilometer.publisher.tcp:TCPPublisher
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file = ceilometer.publisher.file:FilePublisher
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http = ceilometer.publisher.http:HttpPublisher
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prometheus = ceilometer.publisher.prometheus:PrometheusPublisher
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