152 lines
4.4 KiB
Python
152 lines
4.4 KiB
Python
#
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# Copyright 2012 New Dream Network, LLC (DreamHost)
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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 os
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from oslo_config import cfg
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from oslo_log import log
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from paste import deploy
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import pecan
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from werkzeug import serving
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from aodh.api import config as api_config
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from aodh.api import hooks
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from aodh.api import middleware
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from aodh.i18n import _
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from aodh.i18n import _LW
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from aodh import service
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from aodh import storage
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LOG = log.getLogger(__name__)
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CONF = cfg.CONF
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OPTS = [
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cfg.StrOpt('api_paste_config',
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default="api_paste.ini",
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help="Configuration file for WSGI definition of API."
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),
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cfg.IntOpt('api_workers', default=1,
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help='Number of workers for aodh API server.'),
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]
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API_OPTS = [
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cfg.BoolOpt('pecan_debug',
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default=False,
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help='Toggle Pecan Debug Middleware.'),
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]
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CONF.register_opts(OPTS)
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CONF.register_opts(API_OPTS, group='api')
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def get_pecan_config():
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# Set up the pecan configuration
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filename = api_config.__file__.replace('.pyc', '.py')
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return pecan.configuration.conf_from_file(filename)
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def setup_app(pecan_config=None, extra_hooks=None):
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# FIXME: Replace DBHook with a hooks.TransactionHook
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app_hooks = [hooks.ConfigHook(),
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hooks.DBHook(
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storage.get_connection_from_config(cfg.CONF, 'alarm'),),
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hooks.TranslationHook()]
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if extra_hooks:
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app_hooks.extend(extra_hooks)
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if not pecan_config:
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pecan_config = get_pecan_config()
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pecan.configuration.set_config(dict(pecan_config), overwrite=True)
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# NOTE(sileht): pecan debug won't work in multi-process environment
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pecan_debug = CONF.api.pecan_debug
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if service.get_workers('api') != 1 and pecan_debug:
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pecan_debug = False
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LOG.warning(_LW('pecan_debug cannot be enabled, if workers is > 1, '
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'the value is overrided with False'))
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app = pecan.make_app(
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pecan_config.app.root,
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debug=pecan_debug,
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force_canonical=getattr(pecan_config.app, 'force_canonical', True),
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hooks=app_hooks,
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wrap_app=middleware.ParsableErrorMiddleware,
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guess_content_type_from_ext=False
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)
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return app
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class VersionSelectorApplication(object):
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def __init__(self):
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pc = get_pecan_config()
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def not_found(environ, start_response):
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start_response('404 Not Found', [])
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return []
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self.v1 = not_found
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self.v2 = setup_app(pecan_config=pc)
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def __call__(self, environ, start_response):
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if environ['PATH_INFO'].startswith('/v1/'):
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return self.v1(environ, start_response)
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return self.v2(environ, start_response)
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def load_app():
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# Build the WSGI app
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cfg_file = None
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cfg_path = cfg.CONF.api_paste_config
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if not os.path.isabs(cfg_path):
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cfg_file = CONF.find_file(cfg_path)
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elif os.path.exists(cfg_path):
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cfg_file = cfg_path
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if not cfg_file:
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raise cfg.ConfigFilesNotFoundError([cfg.CONF.api_paste_config])
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LOG.info("Full WSGI config used: %s" % cfg_file)
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return deploy.loadapp("config:" + cfg_file)
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def build_server():
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app = load_app()
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# Create the WSGI server and start it
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host, port = cfg.CONF.api.host, cfg.CONF.api.port
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LOG.info(_('Starting server in PID %s') % os.getpid())
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LOG.info(_("Configuration:"))
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cfg.CONF.log_opt_values(LOG, logging.INFO)
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if host == '0.0.0.0':
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LOG.info(_(
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'serving on 0.0.0.0:%(sport)s, view at http://127.0.0.1:%(vport)s')
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% ({'sport': port, 'vport': port}))
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else:
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LOG.info(_("serving on http://%(host)s:%(port)s") % (
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{'host': host, 'port': port}))
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workers = service.get_workers('api')
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serving.run_simple(cfg.CONF.api.host, cfg.CONF.api.port,
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app, processes=workers)
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def app_factory(global_config, **local_conf):
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return VersionSelectorApplication()
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