f0b58f8c27
The prepare_service() function is defined both in watcher/service.py and in watcher/common/service.py. These 2 needed to be merged into a single one to avoid code duplication. At the same time, the watcher/service.py only contains this function, so I removed that file. Change-Id: I0c935dfcd011bee9597315752dae8668221c53f9 Closes-Bug: #1525842
135 lines
4.8 KiB
Python
135 lines
4.8 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2012 eNovance <licensing@enovance.com>
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##
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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import signal
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import socket
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from oslo_config import cfg
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from oslo_log import _options
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from oslo_log import log
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import oslo_messaging as messaging
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from oslo_service import service
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from oslo_utils import importutils
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from watcher._i18n import _LE
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from watcher._i18n import _LI
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from watcher.common import config
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from watcher.common import context
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from watcher.common import rpc
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from watcher.objects import base as objects_base
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service_opts = [
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cfg.IntOpt('periodic_interval',
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default=60,
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help='Seconds between running periodic tasks.'),
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cfg.StrOpt('host',
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default=socket.getfqdn(),
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help='Name of this node. This can be an opaque identifier. '
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'It is not necessarily a hostname, FQDN, or IP address. '
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'However, the node name must be valid within '
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'an AMQP key, and if using ZeroMQ, a valid '
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'hostname, FQDN, or IP address.'),
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]
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cfg.CONF.register_opts(service_opts)
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LOG = log.getLogger(__name__)
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class RPCService(service.Service):
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def __init__(self, host, manager_module, manager_class):
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super(RPCService, self).__init__()
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self.host = host
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manager_module = importutils.try_import(manager_module)
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manager_class = getattr(manager_module, manager_class)
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self.manager = manager_class(host, manager_module.MANAGER_TOPIC)
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self.topic = self.manager.topic
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self.rpcserver = None
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self.deregister = True
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def start(self):
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super(RPCService, self).start()
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admin_context = context.RequestContext('admin', 'admin', is_admin=True)
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target = messaging.Target(topic=self.topic, server=self.host)
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endpoints = [self.manager]
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serializer = objects_base.IronicObjectSerializer()
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self.rpcserver = rpc.get_server(target, endpoints, serializer)
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self.rpcserver.start()
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self.handle_signal()
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self.manager.init_host()
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self.tg.add_dynamic_timer(
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self.manager.periodic_tasks,
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periodic_interval_max=cfg.CONF.periodic_interval,
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context=admin_context)
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LOG.info(_LI('Created RPC server for service %(service)s on host '
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'%(host)s.'),
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{'service': self.topic, 'host': self.host})
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def stop(self):
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try:
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self.rpcserver.stop()
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self.rpcserver.wait()
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except Exception as e:
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LOG.exception(_LE('Service error occurred when stopping the '
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'RPC server. Error: %s'), e)
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try:
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self.manager.del_host(deregister=self.deregister)
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except Exception as e:
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LOG.exception(_LE('Service error occurred when cleaning up '
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'the RPC manager. Error: %s'), e)
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super(RPCService, self).stop(graceful=True)
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LOG.info(_LI('Stopped RPC server for service %(service)s on host '
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'%(host)s.'),
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{'service': self.topic, 'host': self.host})
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def _handle_signal(self, signo, frame):
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LOG.info(_LI('Got signal SIGUSR1. Not deregistering on next shutdown '
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'of service %(service)s on host %(host)s.'),
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{'service': self.topic, 'host': self.host})
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self.deregister = False
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def handle_signal(self):
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"""Add a signal handler for SIGUSR1.
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The handler ensures that the manager is not deregistered when it is
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shutdown.
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"""
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signal.signal(signal.SIGUSR1, self._handle_signal)
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_DEFAULT_LOG_LEVELS = ['amqp=WARN', 'amqplib=WARN', 'qpid.messaging=INFO',
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'oslo.messaging=INFO', 'sqlalchemy=WARN',
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'keystoneclient=INFO', 'stevedore=INFO',
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'eventlet.wsgi.server=WARN', 'iso8601=WARN',
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'paramiko=WARN', 'requests=WARN', 'neutronclient=WARN',
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'glanceclient=WARN', 'watcher.openstack.common=WARN']
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def prepare_service(argv=[], conf=cfg.CONF):
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log.register_options(conf)
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config.parse_args(argv)
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cfg.set_defaults(_options.log_opts,
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default_log_levels=_DEFAULT_LOG_LEVELS)
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log.setup(conf, 'python-watcher')
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conf.log_opt_values(LOG, logging.DEBUG)
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