Merge "Switch to oslo.service"
This commit is contained in:
Jenkins
Gerrit Code Review
commit
e64311726a
@ -26,6 +26,7 @@ import random
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from oslo_config import cfg
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from oslo_context import context
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from oslo_log import log
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from oslo_service import service as os_service
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import six
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from six import moves
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from six.moves.urllib import parse as urlparse
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@ -34,7 +35,6 @@ from stevedore import extension
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from ceilometer.agent import plugin_base
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from ceilometer import coordination
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from ceilometer.i18n import _
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from ceilometer.openstack.common import service as os_service
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from ceilometer import pipeline as publish_pipeline
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from ceilometer import utils
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@ -22,6 +22,7 @@ import abc
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from ceilometerclient import client as ceiloclient
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from oslo_config import cfg
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from oslo_log import log
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from oslo_service import service as os_service
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from oslo_utils import netutils
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import six
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from stevedore import extension
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@ -31,7 +32,6 @@ from ceilometer.alarm import rpc as rpc_alarm
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from ceilometer import coordination as coordination
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from ceilometer.i18n import _
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from ceilometer import messaging
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from ceilometer.openstack.common import service as os_service
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OPTS = [
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@ -14,12 +14,16 @@
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_config import cfg
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from oslo_service import service as os_service
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from ceilometer import notification
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from ceilometer.openstack.common import service as os_service
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from ceilometer import service
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CONF = cfg.CONF
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def main():
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service.prepare_service()
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os_service.launch(notification.NotificationService(),
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os_service.launch(CONF, notification.NotificationService(),
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workers=service.get_workers('notification')).wait()
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@ -14,16 +14,20 @@
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_config import cfg
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from oslo_service import service as os_service
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from ceilometer.alarm import service as alarm_service
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from ceilometer.openstack.common import service as os_service
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from ceilometer import service
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CONF = cfg.CONF
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def notifier():
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service.prepare_service()
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os_service.launch(alarm_service.AlarmNotifierService()).wait()
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os_service.launch(CONF, alarm_service.AlarmNotifierService()).wait()
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def evaluator():
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service.prepare_service()
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os_service.launch(alarm_service.AlarmEvaluationService()).wait()
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os_service.launch(CONF, alarm_service.AlarmEvaluationService()).wait()
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@ -14,12 +14,16 @@
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_config import cfg
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from oslo_service import service as os_service
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from ceilometer import collector
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from ceilometer.openstack.common import service as os_service
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from ceilometer import service
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CONF = cfg.CONF
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def main():
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service.prepare_service()
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os_service.launch(collector.CollectorService(),
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os_service.launch(CONF, collector.CollectorService(),
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workers=service.get_workers('collector')).wait()
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@ -16,10 +16,10 @@
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from oslo_config import cfg
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from oslo_log import log
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from oslo_service import service as os_service
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from ceilometer.agent import manager
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from ceilometer.i18n import _LW
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from ceilometer.openstack.common import service as os_service
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from ceilometer import service
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LOG = log.getLogger(__name__)
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@ -73,22 +73,22 @@ CONF.register_cli_opts(CLI_OPTS)
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def main():
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service.prepare_service()
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os_service.launch(manager.AgentManager(CONF.polling_namespaces,
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CONF.pollster_list)).wait()
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os_service.launch(CONF, manager.AgentManager(CONF.polling_namespaces,
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CONF.pollster_list)).wait()
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# todo(dbelova): remove it someday. Needed for backward compatibility
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def main_compute():
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service.prepare_service()
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os_service.launch(manager.AgentManager(['compute'])).wait()
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os_service.launch(CONF, manager.AgentManager(['compute'])).wait()
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# todo(dbelova): remove it someday. Needed for backward compatibility
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def main_central():
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service.prepare_service()
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os_service.launch(manager.AgentManager(['central'])).wait()
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os_service.launch(CONF, manager.AgentManager(['central'])).wait()
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def main_ipmi():
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service.prepare_service()
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os_service.launch(manager.AgentManager(['ipmi'])).wait()
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os_service.launch(CONF, manager.AgentManager(['ipmi'])).wait()
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@ -19,13 +19,13 @@ import msgpack
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from oslo_config import cfg
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from oslo_log import log
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import oslo_messaging
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from oslo_service import service as os_service
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from oslo_utils import netutils
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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 service as os_service
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from ceilometer import utils
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OPTS = [
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@ -17,6 +17,7 @@ from oslo_config import cfg
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from oslo_context import context
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from oslo_log import log
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import oslo_messaging
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from oslo_service import service as os_service
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from stevedore import extension
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from ceilometer.agent import plugin_base as base
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@ -24,7 +25,6 @@ from ceilometer import coordination
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from ceilometer.event import endpoint as event_endpoint
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from ceilometer.i18n import _, _LW
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from ceilometer import messaging
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from ceilometer.openstack.common import service as os_service
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from ceilometer import pipeline
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from ceilometer import utils
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@ -1,151 +0,0 @@
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# Copyright (c) 2012 OpenStack Foundation.
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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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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from __future__ import print_function
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import copy
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import errno
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import gc
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import logging
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import os
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import pprint
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import socket
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import sys
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import traceback
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import eventlet.backdoor
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import greenlet
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from oslo_config import cfg
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from ceilometer.openstack.common._i18n import _LI
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help_for_backdoor_port = (
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"Acceptable values are 0, <port>, and <start>:<end>, where 0 results "
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"in listening on a random tcp port number; <port> results in listening "
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"on the specified port number (and not enabling backdoor if that port "
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"is in use); and <start>:<end> results in listening on the smallest "
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"unused port number within the specified range of port numbers. The "
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"chosen port is displayed in the service's log file.")
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eventlet_backdoor_opts = [
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cfg.StrOpt('backdoor_port',
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help="Enable eventlet backdoor. %s" % help_for_backdoor_port)
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]
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CONF = cfg.CONF
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CONF.register_opts(eventlet_backdoor_opts)
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LOG = logging.getLogger(__name__)
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def list_opts():
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"""Entry point for oslo-config-generator.
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"""
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return [(None, copy.deepcopy(eventlet_backdoor_opts))]
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class EventletBackdoorConfigValueError(Exception):
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def __init__(self, port_range, help_msg, ex):
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msg = ('Invalid backdoor_port configuration %(range)s: %(ex)s. '
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'%(help)s' %
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{'range': port_range, 'ex': ex, 'help': help_msg})
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super(EventletBackdoorConfigValueError, self).__init__(msg)
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self.port_range = port_range
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def _dont_use_this():
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print("Don't use this, just disconnect instead")
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def _find_objects(t):
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return [o for o in gc.get_objects() if isinstance(o, t)]
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def _print_greenthreads():
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for i, gt in enumerate(_find_objects(greenlet.greenlet)):
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print(i, gt)
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traceback.print_stack(gt.gr_frame)
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print()
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def _print_nativethreads():
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for threadId, stack in sys._current_frames().items():
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print(threadId)
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traceback.print_stack(stack)
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print()
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def _parse_port_range(port_range):
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if ':' not in port_range:
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start, end = port_range, port_range
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else:
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start, end = port_range.split(':', 1)
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try:
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start, end = int(start), int(end)
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if end < start:
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raise ValueError
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return start, end
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except ValueError as ex:
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raise EventletBackdoorConfigValueError(port_range, ex,
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help_for_backdoor_port)
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def _listen(host, start_port, end_port, listen_func):
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try_port = start_port
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while True:
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try:
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return listen_func((host, try_port))
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except socket.error as exc:
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if (exc.errno != errno.EADDRINUSE or
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try_port >= end_port):
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raise
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try_port += 1
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def initialize_if_enabled():
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backdoor_locals = {
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'exit': _dont_use_this, # So we don't exit the entire process
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'quit': _dont_use_this, # So we don't exit the entire process
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'fo': _find_objects,
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'pgt': _print_greenthreads,
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'pnt': _print_nativethreads,
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}
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if CONF.backdoor_port is None:
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return None
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start_port, end_port = _parse_port_range(str(CONF.backdoor_port))
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# NOTE(johannes): The standard sys.displayhook will print the value of
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# the last expression and set it to __builtin__._, which overwrites
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# the __builtin__._ that gettext sets. Let's switch to using pprint
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# since it won't interact poorly with gettext, and it's easier to
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# read the output too.
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def displayhook(val):
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if val is not None:
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pprint.pprint(val)
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sys.displayhook = displayhook
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sock = _listen('localhost', start_port, end_port, eventlet.listen)
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# In the case of backdoor port being zero, a port number is assigned by
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# listen(). In any case, pull the port number out here.
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port = sock.getsockname()[1]
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LOG.info(
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_LI('Eventlet backdoor listening on %(port)s for process %(pid)d'),
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{'port': port, 'pid': os.getpid()}
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)
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eventlet.spawn_n(eventlet.backdoor.backdoor_server, sock,
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locals=backdoor_locals)
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return port
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@ -1,147 +0,0 @@
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# Copyright 2011 Justin Santa Barbara
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# All Rights Reserved.
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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 logging
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import sys
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import time
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from eventlet import event
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from eventlet import greenthread
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from ceilometer.openstack.common._i18n import _LE, _LW
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LOG = logging.getLogger(__name__)
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# NOTE(zyluo): This lambda function was declared to avoid mocking collisions
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# with time.time() called in the standard logging module
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# during unittests.
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_ts = lambda: time.time()
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class LoopingCallDone(Exception):
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"""Exception to break out and stop a LoopingCallBase.
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The poll-function passed to LoopingCallBase can raise this exception to
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break out of the loop normally. This is somewhat analogous to
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StopIteration.
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An optional return-value can be included as the argument to the exception;
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this return-value will be returned by LoopingCallBase.wait()
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"""
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def __init__(self, retvalue=True):
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""":param retvalue: Value that LoopingCallBase.wait() should return."""
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self.retvalue = retvalue
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class LoopingCallBase(object):
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def __init__(self, f=None, *args, **kw):
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self.args = args
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self.kw = kw
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self.f = f
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self._running = False
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self.done = None
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def stop(self):
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self._running = False
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def wait(self):
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return self.done.wait()
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class FixedIntervalLoopingCall(LoopingCallBase):
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"""A fixed interval looping call."""
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def start(self, interval, initial_delay=None):
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self._running = True
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done = event.Event()
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def _inner():
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if initial_delay:
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greenthread.sleep(initial_delay)
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try:
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while self._running:
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start = _ts()
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self.f(*self.args, **self.kw)
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end = _ts()
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if not self._running:
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break
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delay = end - start - interval
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if delay > 0:
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LOG.warning(_LW('task %(func_name)r run outlasted '
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'interval by %(delay).2f sec'),
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{'func_name': self.f, 'delay': delay})
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greenthread.sleep(-delay if delay < 0 else 0)
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except LoopingCallDone as e:
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self.stop()
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done.send(e.retvalue)
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except Exception:
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LOG.exception(_LE('in fixed duration looping call'))
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done.send_exception(*sys.exc_info())
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return
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else:
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done.send(True)
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self.done = done
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greenthread.spawn_n(_inner)
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return self.done
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class DynamicLoopingCall(LoopingCallBase):
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"""A looping call which sleeps until the next known event.
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The function called should return how long to sleep for before being
|
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called again.
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"""
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||||
def start(self, initial_delay=None, periodic_interval_max=None):
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self._running = True
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done = event.Event()
|
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|
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def _inner():
|
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if initial_delay:
|
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greenthread.sleep(initial_delay)
|
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|
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try:
|
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while self._running:
|
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idle = self.f(*self.args, **self.kw)
|
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if not self._running:
|
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break
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|
||||
if periodic_interval_max is not None:
|
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idle = min(idle, periodic_interval_max)
|
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LOG.debug('Dynamic looping call %(func_name)r sleeping '
|
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'for %(idle).02f seconds',
|
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{'func_name': self.f, 'idle': idle})
|
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greenthread.sleep(idle)
|
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except LoopingCallDone as e:
|
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self.stop()
|
||||
done.send(e.retvalue)
|
||||
except Exception:
|
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LOG.exception(_LE('in dynamic looping call'))
|
||||
done.send_exception(*sys.exc_info())
|
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return
|
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else:
|
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done.send(True)
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||||
|
||||
self.done = done
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|
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greenthread.spawn(_inner)
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return self.done
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@ -1,507 +0,0 @@
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# Copyright 2010 United States Government as represented by the
|
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# Administrator of the National Aeronautics and Space Administration.
|
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# Copyright 2011 Justin Santa Barbara
|
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# All Rights Reserved.
|
||||
#
|
||||
# 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.
|
||||
|
||||
"""Generic Node base class for all workers that run on hosts."""
|
||||
|
||||
import errno
|
||||
import io
|
||||
import logging
|
||||
import os
|
||||
import random
|
||||
import signal
|
||||
import sys
|
||||
import time
|
||||
|
||||
import eventlet
|
||||
from eventlet import event
|
||||
from oslo_config import cfg
|
||||
|
||||
from ceilometer.openstack.common import eventlet_backdoor
|
||||
from ceilometer.openstack.common._i18n import _LE, _LI, _LW
|
||||
from ceilometer.openstack.common import systemd
|
||||
from ceilometer.openstack.common import threadgroup
|
||||
|
||||
|
||||
CONF = cfg.CONF
|
||||
LOG = logging.getLogger(__name__)
|
||||
|
||||
|
||||
def _sighup_supported():
|
||||
return hasattr(signal, 'SIGHUP')
|
||||
|
||||
|
||||
def _is_daemon():
|
||||
# The process group for a foreground process will match the
|
||||
# process group of the controlling terminal. If those values do
|
||||
# not match, or ioctl() fails on the stdout file handle, we assume
|
||||
# the process is running in the background as a daemon.
|
||||
# http://www.gnu.org/software/bash/manual/bashref.html#Job-Control-Basics
|
||||
try:
|
||||
is_daemon = os.getpgrp() != os.tcgetpgrp(sys.stdout.fileno())
|
||||
except io.UnsupportedOperation:
|
||||
# Could not get the fileno for stdout, so we must be a daemon.
|
||||
is_daemon = True
|
||||
except OSError as err:
|
||||
if err.errno == errno.ENOTTY:
|
||||
# Assume we are a daemon because there is no terminal.
|
||||
is_daemon = True
|
||||
else:
|
||||
raise
|
||||
return is_daemon
|
||||
|
||||
|
||||
def _is_sighup_and_daemon(signo):
|
||||
if not (_sighup_supported() and signo == signal.SIGHUP):
|
||||
# Avoid checking if we are a daemon, because the signal isn't
|
||||
# SIGHUP.
|
||||
return False
|
||||
return _is_daemon()
|
||||
|
||||
|
||||
def _signo_to_signame(signo):
|
||||
signals = {signal.SIGTERM: 'SIGTERM',
|
||||
signal.SIGINT: 'SIGINT'}
|
||||
if _sighup_supported():
|
||||
signals[signal.SIGHUP] = 'SIGHUP'
|
||||
return signals[signo]
|
||||
|
||||
|
||||
def _set_signals_handler(handler):
|
||||
signal.signal(signal.SIGTERM, handler)
|
||||
signal.signal(signal.SIGINT, handler)
|
||||
if _sighup_supported():
|
||||
signal.signal(signal.SIGHUP, handler)
|
||||
|
||||
|
||||
class Launcher(object):
|
||||
"""Launch one or more services and wait for them to complete."""
|
||||
|
||||
def __init__(self):
|
||||
"""Initialize the service launcher.
|
||||
|
||||
:returns: None
|
||||
|
||||
"""
|
||||
self.services = Services()
|
||||
self.backdoor_port = eventlet_backdoor.initialize_if_enabled()
|
||||
|
||||
def launch_service(self, service):
|
||||
"""Load and start the given service.
|
||||
|
||||
:param service: The service you would like to start.
|
||||
:returns: None
|
||||
|
||||
"""
|
||||
service.backdoor_port = self.backdoor_port
|
||||
self.services.add(service)
|
||||
|
||||
def stop(self):
|
||||
"""Stop all services which are currently running.
|
||||
|
||||
:returns: None
|
||||
|
||||
"""
|
||||
self.services.stop()
|
||||
|
||||
def wait(self):
|
||||
"""Waits until all services have been stopped, and then returns.
|
||||
|
||||
:returns: None
|
||||
|
||||
"""
|
||||
self.services.wait()
|
||||
|
||||
def restart(self):
|
||||
"""Reload config files and restart service.
|
||||
|
||||
:returns: None
|
||||
|
||||
"""
|
||||
cfg.CONF.reload_config_files()
|
||||
self.services.restart()
|
||||
|
||||
|
||||
class SignalExit(SystemExit):
|
||||
def __init__(self, signo, exccode=1):
|
||||
super(SignalExit, self).__init__(exccode)
|
||||
self.signo = signo
|
||||
|
||||
|
||||
class ServiceLauncher(Launcher):
|
||||
def _handle_signal(self, signo, frame):
|
||||
# Allow the process to be killed again and die from natural causes
|
||||
_set_signals_handler(signal.SIG_DFL)
|
||||
raise SignalExit(signo)
|
||||
|
||||
def handle_signal(self):
|
||||
_set_signals_handler(self._handle_signal)
|
||||
|
||||
def _wait_for_exit_or_signal(self, ready_callback=None):
|
||||
status = None
|
||||
signo = 0
|
||||
|
||||
LOG.debug('Full set of CONF:')
|
||||
CONF.log_opt_values(LOG, logging.DEBUG)
|
||||
|
||||
try:
|
||||
if ready_callback:
|
||||
ready_callback()
|
||||
super(ServiceLauncher, self).wait()
|
||||
except SignalExit as exc:
|
||||
signame = _signo_to_signame(exc.signo)
|
||||
LOG.info(_LI('Caught %s, exiting'), signame)
|
||||
status = exc.code
|
||||
signo = exc.signo
|
||||
except SystemExit as exc:
|
||||
status = exc.code
|
||||
finally:
|
||||
self.stop()
|
||||
|
||||
return status, signo
|
||||
|
||||
def wait(self, ready_callback=None):
|
||||
systemd.notify_once()
|
||||
while True:
|
||||
self.handle_signal()
|
||||
status, signo = self._wait_for_exit_or_signal(ready_callback)
|
||||
if not _is_sighup_and_daemon(signo):
|
||||
return status
|
||||
self.restart()
|
||||
|
||||
|
||||
class ServiceWrapper(object):
|
||||
def __init__(self, service, workers):
|
||||
self.service = service
|
||||
self.workers = workers
|
||||
self.children = set()
|
||||
self.forktimes = []
|
||||
|
||||
|
||||
class ProcessLauncher(object):
|
||||
_signal_handlers_set = set()
|
||||
|
||||
@classmethod
|
||||
def _handle_class_signals(cls, *args, **kwargs):
|
||||
for handler in cls._signal_handlers_set:
|
||||
handler(*args, **kwargs)
|
||||
|
||||
def __init__(self, wait_interval=0.01):
|
||||
"""Constructor.
|
||||
|
||||
:param wait_interval: The interval to sleep for between checks
|
||||
of child process exit.
|
||||
"""
|
||||
self.children = {}
|
||||
self.sigcaught = None
|
||||
self.running = True
|
||||
self.wait_interval = wait_interval
|
||||
rfd, self.writepipe = os.pipe()
|
||||
self.readpipe = eventlet.greenio.GreenPipe(rfd, 'r')
|
||||
self.handle_signal()
|
||||
|
||||
def handle_signal(self):
|
||||
self._signal_handlers_set.add(self._handle_signal)
|
||||
_set_signals_handler(self._handle_class_signals)
|
||||
|
||||
def _handle_signal(self, signo, frame):
|
||||
self.sigcaught = signo
|
||||
self.running = False
|
||||
|
||||
# Allow the process to be killed again and die from natural causes
|
||||
_set_signals_handler(signal.SIG_DFL)
|
||||
|
||||
def _pipe_watcher(self):
|
||||
# This will block until the write end is closed when the parent
|
||||
# dies unexpectedly
|
||||
self.readpipe.read(1)
|
||||
|
||||
LOG.info(_LI('Parent process has died unexpectedly, exiting'))
|
||||
|
||||
sys.exit(1)
|
||||
|
||||
def _child_process_handle_signal(self):
|
||||
# Setup child signal handlers differently
|
||||
def _sighup(*args):
|
||||
signal.signal(signal.SIGHUP, signal.SIG_DFL)
|
||||
raise SignalExit(signal.SIGHUP)
|
||||
|
||||
# Parent signals with SIGTERM when it wants us to go away.
|
||||
signal.signal(signal.SIGTERM, signal.SIG_DFL)
|
||||
if _sighup_supported():
|
||||
signal.signal(signal.SIGHUP, _sighup)
|
||||
# Block SIGINT and let the parent send us a SIGTERM
|
||||
signal.signal(signal.SIGINT, signal.SIG_IGN)
|
||||
|
||||
def _child_wait_for_exit_or_signal(self, launcher):
|
||||
status = 0
|
||||
signo = 0
|
||||
|
||||
# NOTE(johannes): All exceptions are caught to ensure this
|
||||
# doesn't fallback into the loop spawning children. It would
|
||||
# be bad for a child to spawn more children.
|
||||
try:
|
||||
launcher.wait()
|
||||
except SignalExit as exc:
|
||||
signame = _signo_to_signame(exc.signo)
|
||||
LOG.info(_LI('Child caught %s, exiting'), signame)
|
||||
status = exc.code
|
||||
signo = exc.signo
|
||||
except SystemExit as exc:
|
||||
status = exc.code
|
||||
except BaseException:
|
||||
LOG.exception(_LE('Unhandled exception'))
|
||||
status = 2
|
||||
finally:
|
||||
launcher.stop()
|
||||
|
||||
return status, signo
|
||||
|
||||
def _child_process(self, service):
|
||||
self._child_process_handle_signal()
|
||||
|
||||
# Reopen the eventlet hub to make sure we don't share an epoll
|
||||
# fd with parent and/or siblings, which would be bad
|
||||
eventlet.hubs.use_hub()
|
||||
|
||||
# Close write to ensure only parent has it open
|
||||
os.close(self.writepipe)
|
||||
# Create greenthread to watch for parent to close pipe
|
||||
eventlet.spawn_n(self._pipe_watcher)
|
||||
|
||||
# Reseed random number generator
|
||||
random.seed()
|
||||
|
||||
launcher = Launcher()
|
||||
launcher.launch_service(service)
|
||||
return launcher
|
||||
|
||||
def _start_child(self, wrap):
|
||||
if len(wrap.forktimes) > wrap.workers:
|
||||
# Limit ourselves to one process a second (over the period of
|
||||
# number of workers * 1 second). This will allow workers to
|
||||
# start up quickly but ensure we don't fork off children that
|
||||
# die instantly too quickly.
|
||||
if time.time() - wrap.forktimes[0] < wrap.workers:
|
||||
LOG.info(_LI('Forking too fast, sleeping'))
|
||||
time.sleep(1)
|
||||
|
||||
wrap.forktimes.pop(0)
|
||||
|
||||
wrap.forktimes.append(time.time())
|
||||
|
||||
pid = os.fork()
|
||||
if pid == 0:
|
||||
launcher = self._child_process(wrap.service)
|
||||
while True:
|
||||
self._child_process_handle_signal()
|
||||
status, signo = self._child_wait_for_exit_or_signal(launcher)
|
||||
if not _is_sighup_and_daemon(signo):
|
||||
break
|
||||
launcher.restart()
|
||||
|
||||
os._exit(status)
|
||||
|
||||
LOG.info(_LI('Started child %d'), pid)
|
||||
|
||||
wrap.children.add(pid)
|
||||
self.children[pid] = wrap
|
||||
|
||||
return pid
|
||||
|
||||
def launch_service(self, service, workers=1):
|
||||
wrap = ServiceWrapper(service, workers)
|
||||
|
||||
LOG.info(_LI('Starting %d workers'), wrap.workers)
|
||||
while self.running and len(wrap.children) < wrap.workers:
|
||||
self._start_child(wrap)
|
||||
|
||||
def _wait_child(self):
|
||||
try:
|
||||
# Don't block if no child processes have exited
|
||||
pid, status = os.waitpid(0, os.WNOHANG)
|
||||
if not pid:
|
||||
return None
|
||||
except OSError as exc:
|
||||
if exc.errno not in (errno.EINTR, errno.ECHILD):
|
||||
raise
|
||||
return None
|
||||
|
||||
if os.WIFSIGNALED(status):
|
||||
sig = os.WTERMSIG(status)
|
||||
LOG.info(_LI('Child %(pid)d killed by signal %(sig)d'),
|
||||
dict(pid=pid, sig=sig))
|
||||
else:
|
||||
code = os.WEXITSTATUS(status)
|
||||
LOG.info(_LI('Child %(pid)s exited with status %(code)d'),
|
||||
dict(pid=pid, code=code))
|
||||
|
||||
if pid not in self.children:
|
||||
LOG.warning(_LW('pid %d not in child list'), pid)
|
||||
return None
|
||||
|
||||
wrap = self.children.pop(pid)
|
||||
wrap.children.remove(pid)
|
||||
return wrap
|
||||
|
||||
def _respawn_children(self):
|
||||
while self.running:
|
||||
wrap = self._wait_child()
|
||||
if not wrap:
|
||||
# Yield to other threads if no children have exited
|
||||
# Sleep for a short time to avoid excessive CPU usage
|
||||
# (see bug #1095346)
|
||||
eventlet.greenthread.sleep(self.wait_interval)
|
||||
continue
|
||||
while self.running and len(wrap.children) < wrap.workers:
|
||||
self._start_child(wrap)
|
||||
|
||||
def wait(self):
|
||||
"""Loop waiting on children to die and respawning as necessary."""
|
||||
|
||||
systemd.notify_once()
|
||||
LOG.debug('Full set of CONF:')
|
||||
CONF.log_opt_values(LOG, logging.DEBUG)
|
||||
|
||||
try:
|
||||
while True:
|
||||
self.handle_signal()
|
||||
self._respawn_children()
|
||||
# No signal means that stop was called. Don't clean up here.
|
||||
if not self.sigcaught:
|
||||
return
|
||||
|
||||
signame = _signo_to_signame(self.sigcaught)
|
||||
LOG.info(_LI('Caught %s, stopping children'), signame)
|
||||
if not _is_sighup_and_daemon(self.sigcaught):
|
||||
break
|
||||
|
||||
cfg.CONF.reload_config_files()
|
||||
for service in set(
|
||||
[wrap.service for wrap in self.children.values()]):
|
||||
service.reset()
|
||||
|
||||
for pid in self.children:
|
||||
os.kill(pid, signal.SIGHUP)
|
||||
|
||||
self.running = True
|
||||
self.sigcaught = None
|
||||
except eventlet.greenlet.GreenletExit:
|
||||
LOG.info(_LI("Wait called after thread killed. Cleaning up."))
|
||||
|
||||
self.stop()
|
||||
|
||||
def stop(self):
|
||||
"""Terminate child processes and wait on each."""
|
||||
self.running = False
|
||||
for pid in self.children:
|
||||
try:
|
||||
os.kill(pid, signal.SIGTERM)
|
||||
except OSError as exc:
|
||||
if exc.errno != errno.ESRCH:
|
||||
raise
|
||||
|
||||
# Wait for children to die
|
||||
if self.children:
|
||||
LOG.info(_LI('Waiting on %d children to exit'), len(self.children))
|
||||
while self.children:
|
||||
self._wait_child()
|
||||
|
||||
|
||||
class Service(object):
|
||||
"""Service object for binaries running on hosts."""
|
||||
|
||||
def __init__(self, threads=1000):
|
||||
self.tg = threadgroup.ThreadGroup(threads)
|
||||
|
||||
# signal that the service is done shutting itself down:
|
||||
self._done = event.Event()
|
||||
|
||||
def reset(self):
|
||||
# NOTE(Fengqian): docs for Event.reset() recommend against using it
|
||||
self._done = event.Event()
|
||||
|
||||
def start(self):
|
||||
pass
|
||||
|
||||
def stop(self, graceful=False):
|
||||
self.tg.stop(graceful)
|
||||
self.tg.wait()
|
||||
# Signal that service cleanup is done:
|
||||
if not self._done.ready():
|
||||
self._done.send()
|
||||
|
||||
def wait(self):
|
||||
self._done.wait()
|
||||
|
||||
|
||||
class Services(object):
|
||||
|
||||
def __init__(self):
|
||||
self.services = []
|
||||
self.tg = threadgroup.ThreadGroup()
|
||||
self.done = event.Event()
|
||||
|
||||
def add(self, service):
|
||||
self.services.append(service)
|
||||
self.tg.add_thread(self.run_service, service, self.done)
|
||||
|
||||
def stop(self):
|
||||
# wait for graceful shutdown of services:
|
||||
for service in self.services:
|
||||
service.stop()
|
||||
service.wait()
|
||||
|
||||
# Each service has performed cleanup, now signal that the run_service
|
||||
# wrapper threads can now die:
|
||||
if not self.done.ready():
|
||||
self.done.send()
|
||||
|
||||
# reap threads:
|
||||
self.tg.stop()
|
||||
|
||||
def wait(self):
|
||||
self.tg.wait()
|
||||
|
||||
def restart(self):
|
||||
self.stop()
|
||||
self.done = event.Event()
|
||||
for restart_service in self.services:
|
||||
restart_service.reset()
|
||||
self.tg.add_thread(self.run_service, restart_service, self.done)
|
||||
|
||||
@staticmethod
|
||||
def run_service(service, done):
|
||||
"""Service start wrapper.
|
||||
|
||||
:param service: service to run
|
||||
:param done: event to wait on until a shutdown is triggered
|
||||
:returns: None
|
||||
|
||||
"""
|
||||
service.start()
|
||||
done.wait()
|
||||
|
||||
|
||||
def launch(service, workers=1):
|
||||
if workers is None or workers == 1:
|
||||
launcher = ServiceLauncher()
|
||||
launcher.launch_service(service)
|
||||
else:
|
||||
launcher = ProcessLauncher()
|
||||
launcher.launch_service(service, workers=workers)
|
||||
|
||||
return launcher
|
||||
@ -1,105 +0,0 @@
|
||||
# Copyright 2012-2014 Red Hat, Inc.
|
||||
#
|
||||
# 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.
|
||||
|
||||
"""
|
||||
Helper module for systemd service readiness notification.
|
||||
"""
|
||||
|
||||
import logging
|
||||
import os
|
||||
import socket
|
||||
import sys
|
||||
|
||||
|
||||
LOG = logging.getLogger(__name__)
|
||||
|
||||
|
||||
def _abstractify(socket_name):
|
||||
if socket_name.startswith('@'):
|
||||
# abstract namespace socket
|
||||
socket_name = '\0%s' % socket_name[1:]
|
||||
return socket_name
|
||||
|
||||
|
||||
def _sd_notify(unset_env, msg):
|
||||
notify_socket = os.getenv('NOTIFY_SOCKET')
|
||||
if notify_socket:
|
||||
sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
|
||||
try:
|
||||
sock.connect(_abstractify(notify_socket))
|
||||
sock.sendall(msg)
|
||||
if unset_env:
|
||||
del os.environ['NOTIFY_SOCKET']
|
||||
except EnvironmentError:
|
||||
LOG.debug("Systemd notification failed", exc_info=True)
|
||||
finally:
|
||||
sock.close()
|
||||
|
||||
|
||||
def notify():
|
||||
"""Send notification to Systemd that service is ready.
|
||||
|
||||
For details see
|
||||
http://www.freedesktop.org/software/systemd/man/sd_notify.html
|
||||
"""
|
||||
_sd_notify(False, 'READY=1')
|
||||
|
||||
|
||||
def notify_once():
|
||||
"""Send notification once to Systemd that service is ready.
|
||||
|
||||
Systemd sets NOTIFY_SOCKET environment variable with the name of the
|
||||
socket listening for notifications from services.
|
||||
This method removes the NOTIFY_SOCKET environment variable to ensure
|
||||
notification is sent only once.
|
||||
"""
|
||||
_sd_notify(True, 'READY=1')
|
||||
|
||||
|
||||
def onready(notify_socket, timeout):
|
||||
"""Wait for systemd style notification on the socket.
|
||||
|
||||
:param notify_socket: local socket address
|
||||
:type notify_socket: string
|
||||
:param timeout: socket timeout
|
||||
:type timeout: float
|
||||
:returns: 0 service ready
|
||||
1 service not ready
|
||||
2 timeout occurred
|
||||
"""
|
||||
sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
|
||||
sock.settimeout(timeout)
|
||||
sock.bind(_abstractify(notify_socket))
|
||||
try:
|
||||
msg = sock.recv(512)
|
||||
except socket.timeout:
|
||||
return 2
|
||||
finally:
|
||||
sock.close()
|
||||
if 'READY=1' in msg:
|
||||
return 0
|
||||
else:
|
||||
return 1
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
# simple CLI for testing
|
||||
if len(sys.argv) == 1:
|
||||
notify()
|
||||
elif len(sys.argv) >= 2:
|
||||
timeout = float(sys.argv[1])
|
||||
notify_socket = os.getenv('NOTIFY_SOCKET')
|
||||
if notify_socket:
|
||||
retval = onready(notify_socket, timeout)
|
||||
sys.exit(retval)
|
||||
@ -1,150 +0,0 @@
|
||||
# Copyright 2012 Red Hat, Inc.
|
||||
#
|
||||
# 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.
|
||||
import logging
|
||||
import threading
|
||||
|
||||
import eventlet
|
||||
from eventlet import greenpool
|
||||
|
||||
from ceilometer.openstack.common._i18n import _LE
|
||||
from ceilometer.openstack.common import loopingcall
|
||||
|
||||
|
||||
LOG = logging.getLogger(__name__)
|
||||
|
||||
|
||||
def _thread_done(gt, *args, **kwargs):
|
||||
"""Callback function to be passed to GreenThread.link() when we spawn()
|
||||
Calls the :class:`ThreadGroup` to notify if.
|
||||
|
||||
"""
|
||||
kwargs['group'].thread_done(kwargs['thread'])
|
||||
|
||||
|
||||
class Thread(object):
|
||||
"""Wrapper around a greenthread, that holds a reference to the
|
||||
:class:`ThreadGroup`. The Thread will notify the :class:`ThreadGroup` when
|
||||
it has done so it can be removed from the threads list.
|
||||
"""
|
||||
def __init__(self, thread, group):
|
||||
self.thread = thread
|
||||
self.thread.link(_thread_done, group=group, thread=self)
|
||||
|
||||
def stop(self):
|
||||
self.thread.kill()
|
||||
|
||||
def wait(self):
|
||||
return self.thread.wait()
|
||||
|
||||
def link(self, func, *args, **kwargs):
|
||||
self.thread.link(func, *args, **kwargs)
|
||||
|
||||
|
||||
class ThreadGroup(object):
|
||||
"""The point of the ThreadGroup class is to:
|
||||
|
||||
* keep track of timers and greenthreads (making it easier to stop them
|
||||
when need be).
|
||||
* provide an easy API to add timers.
|
||||
"""
|
||||
def __init__(self, thread_pool_size=10):
|
||||
self.pool = greenpool.GreenPool(thread_pool_size)
|
||||
self.threads = []
|
||||
self.timers = []
|
||||
|
||||
def add_dynamic_timer(self, callback, initial_delay=None,
|
||||
periodic_interval_max=None, *args, **kwargs):
|
||||
timer = loopingcall.DynamicLoopingCall(callback, *args, **kwargs)
|
||||
timer.start(initial_delay=initial_delay,
|
||||
periodic_interval_max=periodic_interval_max)
|
||||
self.timers.append(timer)
|
||||
|
||||
def add_timer(self, interval, callback, initial_delay=None,
|
||||
*args, **kwargs):
|
||||
pulse = loopingcall.FixedIntervalLoopingCall(callback, *args, **kwargs)
|
||||
pulse.start(interval=interval,
|
||||
initial_delay=initial_delay)
|
||||
self.timers.append(pulse)
|
||||
|
||||
def add_thread(self, callback, *args, **kwargs):
|
||||
gt = self.pool.spawn(callback, *args, **kwargs)
|
||||
th = Thread(gt, self)
|
||||
self.threads.append(th)
|
||||
return th
|
||||
|
||||
def thread_done(self, thread):
|
||||
self.threads.remove(thread)
|
||||
|
||||
def _stop_threads(self):
|
||||
current = threading.current_thread()
|
||||
|
||||
# Iterate over a copy of self.threads so thread_done doesn't
|
||||
# modify the list while we're iterating
|
||||
for x in self.threads[:]:
|
||||
if x is current:
|
||||
# don't kill the current thread.
|
||||
continue
|
||||
try:
|
||||
x.stop()
|
||||
except eventlet.greenlet.GreenletExit:
|
||||
pass
|
||||
except Exception:
|
||||
LOG.exception(_LE('Error stopping thread.'))
|
||||
|
||||
def stop_timers(self):
|
||||
for x in self.timers:
|
||||
try:
|
||||
x.stop()
|
||||
except Exception:
|
||||
LOG.exception(_LE('Error stopping timer.'))
|
||||
self.timers = []
|
||||
|
||||
def stop(self, graceful=False):
|
||||
"""stop function has the option of graceful=True/False.
|
||||
|
||||
* In case of graceful=True, wait for all threads to be finished.
|
||||
Never kill threads.
|
||||
* In case of graceful=False, kill threads immediately.
|
||||
"""
|
||||
self.stop_timers()
|
||||
if graceful:
|
||||
# In case of graceful=True, wait for all threads to be
|
||||
# finished, never kill threads
|
||||
self.wait()
|
||||
else:
|
||||
# In case of graceful=False(Default), kill threads
|
||||
# immediately
|
||||
self._stop_threads()
|
||||
|
||||
def wait(self):
|
||||
for x in self.timers:
|
||||
try:
|
||||
x.wait()
|
||||
except eventlet.greenlet.GreenletExit:
|
||||
pass
|
||||
except Exception:
|
||||
LOG.exception(_LE('Error waiting on ThreadGroup.'))
|
||||
current = threading.current_thread()
|
||||
|
||||
# Iterate over a copy of self.threads so thread_done doesn't
|
||||
# modify the list while we're iterating
|
||||
for x in self.threads[:]:
|
||||
if x is current:
|
||||
continue
|
||||
try:
|
||||
x.wait()
|
||||
except eventlet.greenlet.GreenletExit:
|
||||
pass
|
||||
except Exception as ex:
|
||||
LOG.exception(ex)
|
||||
@ -13,6 +13,8 @@
|
||||
# under the License.
|
||||
import itertools
|
||||
|
||||
import oslo_service.eventlet_backdoor
|
||||
|
||||
import ceilometer.agent.manager
|
||||
import ceilometer.alarm.notifier.rest
|
||||
import ceilometer.alarm.rpc
|
||||
@ -49,7 +51,6 @@ import ceilometer.notification
|
||||
import ceilometer.nova_client
|
||||
import ceilometer.objectstore.rgw
|
||||
import ceilometer.objectstore.swift
|
||||
import ceilometer.openstack.common.eventlet_backdoor
|
||||
import ceilometer.orchestration.notifications
|
||||
import ceilometer.pipeline
|
||||
import ceilometer.profiler.notifications
|
||||
@ -65,7 +66,8 @@ import ceilometer.volume.notifications
|
||||
def list_opts():
|
||||
return [
|
||||
('DEFAULT',
|
||||
itertools.chain(ceilometer.agent.base.OPTS,
|
||||
itertools.chain(oslo_service.eventlet_backdoor.eventlet_backdoor_opts,
|
||||
ceilometer.agent.base.OPTS,
|
||||
ceilometer.api.app.OPTS,
|
||||
ceilometer.cmd.eventlet.polling.CLI_OPTS,
|
||||
ceilometer.compute.notifications.OPTS,
|
||||
@ -82,8 +84,6 @@ def list_opts():
|
||||
ceilometer.network.notifications.OPTS,
|
||||
ceilometer.nova_client.OPTS,
|
||||
ceilometer.objectstore.swift.OPTS,
|
||||
(ceilometer.openstack.common.eventlet_backdoor
|
||||
.eventlet_backdoor_opts),
|
||||
ceilometer.orchestration.notifications.OPTS,
|
||||
ceilometer.pipeline.OPTS,
|
||||
ceilometer.profiler.notifications.OPTS,
|
||||
|
||||
@ -20,6 +20,7 @@ from oslo_config import fixture as fixture_config
|
||||
from oslo_context import context
|
||||
import oslo_messaging
|
||||
import oslo_messaging.conffixture
|
||||
import oslo_service.service
|
||||
from oslo_utils import timeutils
|
||||
import six
|
||||
from stevedore import extension
|
||||
@ -29,7 +30,6 @@ from ceilometer.compute.notifications import instance
|
||||
from ceilometer import messaging
|
||||
from ceilometer import notification
|
||||
from ceilometer.openstack.common import fileutils
|
||||
import ceilometer.openstack.common.service
|
||||
from ceilometer.publisher import test as test_publisher
|
||||
from ceilometer.tests import base as tests_base
|
||||
|
||||
@ -286,7 +286,7 @@ class TestRealNotification(BaseRealNotification):
|
||||
fake_coord.return_value = fake_coord1
|
||||
self._check_notification_service()
|
||||
|
||||
@mock.patch.object(ceilometer.openstack.common.service.Service, 'stop')
|
||||
@mock.patch.object(oslo_service.service.Service, 'stop')
|
||||
def test_notification_service_start_abnormal(self, mocked):
|
||||
try:
|
||||
self.srv.stop()
|
||||
|
||||
@ -1,7 +1,4 @@
|
||||
[DEFAULT]
|
||||
|
||||
# The list of modules to copy from oslo-incubator
|
||||
module=service
|
||||
|
||||
# The base module to hold the copy of openstack.common
|
||||
base=ceilometer
|
||||
|
||||
@ -20,6 +20,7 @@ oslo.i18n>=1.5.0 # Apache-2.0
|
||||
oslo.log>=1.2.0 # Apache-2.0
|
||||
oslo.policy>=0.5.0 # Apache-2.0
|
||||
oslo.rootwrap>=2.0.0 # Apache-2.0
|
||||
oslo.service>=0.1.0 # Apache-2.0
|
||||
PasteDeploy>=1.5.0
|
||||
pbr>=0.11,<2.0
|
||||
pecan>=0.8.0
|
||||
|
||||
Loading…
Reference in New Issue
Block a user