OpenStack Networking (Neutron)
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 Nicira Networks, Inc
# 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.
import logging
from quantum.common import config
from quantum.common import wsgi
from quantum.common import exceptions as exception
LOG = logging.getLogger('quantum.service')
class WsgiService(object):
"""Base class for WSGI based services.
For each api you define, you must also define these flags:
:<api>_listen: The address on which to listen
:<api>_listen_port: The port on which to listen
"""
def __init__(self, app_name, conf_file, conf):
self.app_name = app_name
self.conf_file = conf_file
self.conf = conf
self.wsgi_app = None
def start(self):
self.wsgi_app = _run_wsgi(self.app_name, self.conf, self.conf_file)
def wait(self):
self.wsgi_app.wait()
class QuantumApiService(WsgiService):
"""Class for quantum-api service."""
@classmethod
def create(cls, conf=None, options=None, args=None):
app_name = "quantum"
if not conf:
conf_file, conf = config.load_paste_config(
app_name, options, args)
if not conf:
message = (_('No paste configuration found for: %s'),
app_name)
raise exception.Error(message)
# Setup logging early, supplying both the CLI options and the
# configuration mapping from the config file
# We only update the conf dict for the verbose and debug
# flags. Everything else must be set up in the conf file...
# Log the options used when starting if we're in debug mode...
config.setup_logging(options, conf)
debug = options.get('debug') or \
config.get_option(conf, 'debug',
type='bool', default=False)
verbose = options.get('verbose') or \
config.get_option(conf, 'verbose',
type='bool', default=False)
conf['debug'] = debug
conf['verbose'] = verbose
LOG.debug("*" * 80)
LOG.debug("Configuration options gathered from config file:")
LOG.debug(conf_file)
LOG.debug("================================================")
items = dict([(k, v) for k, v in conf.items()
if k not in ('__file__', 'here')])
for key, value in sorted(items.items()):
LOG.debug("%(key)-30s %(value)s" % locals())
LOG.debug("*" * 80)
service = cls(app_name, conf_file, conf)
return service
def serve_wsgi(cls, conf=None, options=None, args=None):
try:
service = cls.create(conf, options, args)
except Exception:
logging.exception('in WsgiService.create()')
raise
service.start()
return service
def _run_wsgi(app_name, paste_conf, paste_config_file):
LOG.info(_('Using paste.deploy config at: %s'), paste_config_file)
app = config.load_paste_app(paste_config_file, app_name)
if not app:
LOG.error(_('No known API applications configured in %s.'),
paste_config_file)
return
server = wsgi.Server()
server.start(app,
int(paste_conf['bind_port']), paste_conf['bind_host'])
return server