118 lines
3.3 KiB
Python
118 lines
3.3 KiB
Python
# Copyright 2011 VMware, Inc
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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 as std_logging
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_service import service
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from oslo_utils import excutils
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from tacker.common import config
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from tacker import wsgi
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service_opts = [
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cfg.IntOpt('periodic_interval',
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default=40,
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help=_('Seconds between running periodic tasks')),
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cfg.IntOpt('api_workers',
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default=0,
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help=_('Number of separate worker processes for service')),
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cfg.IntOpt('periodic_fuzzy_delay',
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default=5,
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help=_('Range of seconds to randomly delay when starting the '
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'periodic task scheduler to reduce stampeding. '
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'(Disable by setting to 0)')),
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]
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CONF = cfg.CONF
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CONF.register_opts(service_opts)
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def config_opts():
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return [(None, service_opts)]
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LOG = logging.getLogger(__name__)
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class WsgiService(service.ServiceBase):
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"""Base class for WSGI based services.
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For each api you define, you must also define these flags:
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:<api>_listen: The address on which to listen
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:<api>_listen_port: The port on which to listen
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"""
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def __init__(self, app_name):
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self.app_name = app_name
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self.wsgi_app = None
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def start(self):
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self.wsgi_app = _run_wsgi(self.app_name)
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def wait(self):
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if self.wsgi_app:
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self.wsgi_app.wait()
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def stop(self):
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pass
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def reset(self):
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pass
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class TackerApiService(WsgiService):
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"""Class for tacker-api service."""
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@classmethod
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def create(cls, app_name='tacker'):
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# Setup logging early
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config.setup_logging(cfg.CONF)
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# Dump the initial option values
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cfg.CONF.log_opt_values(LOG, std_logging.DEBUG)
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service = cls(app_name)
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return service
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def serve_wsgi(cls):
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try:
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service = cls.create()
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except Exception:
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with excutils.save_and_reraise_exception():
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LOG.exception(_('Unrecoverable error: please check log '
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'for details.'))
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return service
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def _run_wsgi(app_name):
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app = config.load_paste_app(app_name)
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if not app:
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LOG.error(_('No known API applications configured.'))
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return
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server = wsgi.Server("Tacker")
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server.start(app, cfg.CONF.bind_port, cfg.CONF.bind_host,
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workers=cfg.CONF.api_workers)
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# Dump all option values here after all options are parsed
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cfg.CONF.log_opt_values(LOG, std_logging.DEBUG)
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LOG.info(_("Tacker service started, listening on %(host)s:%(port)s"),
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{'host': cfg.CONF.bind_host,
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'port': cfg.CONF.bind_port})
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return server
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