Source code for octavia.api.app

#    Copyright 2014 Rackspace
#
#    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 sys

import keystonemiddleware.audit as audit_middleware
from oslo_config import cfg
from oslo_log import log as logging
from oslo_middleware import cors
from oslo_middleware import http_proxy_to_wsgi
from oslo_middleware import request_id
from oslo_middleware import sizelimit
from pecan import configuration as pecan_configuration
from pecan import make_app as pecan_make_app

from octavia.api import config as app_config
from octavia.api.drivers import driver_factory
from octavia.common import constants
from octavia.common import exceptions
from octavia.common import keystone
from octavia.common import service as octavia_service

LOG = logging.getLogger(__name__)
CONF = cfg.CONF


[docs] def get_pecan_config(): """Returns the pecan config.""" filename = app_config.__file__.replace('.pyc', '.py') return pecan_configuration.conf_from_file(filename)
def _init_drivers(): """Initialize provider drivers.""" for provider in CONF.api_settings.enabled_provider_drivers: driver_factory.get_driver(provider)
[docs] def setup_app(pecan_config=None, debug=False, argv=None): """Creates and returns a pecan wsgi app.""" if argv is None: argv = sys.argv octavia_service.prepare_service(argv) cfg.CONF.log_opt_values(LOG, logging.INFO) _init_drivers() if not pecan_config: pecan_config = get_pecan_config() pecan_configuration.set_config(dict(pecan_config), overwrite=True) return pecan_make_app( pecan_config.app.root, wrap_app=_wrap_app, debug=debug, hooks=pecan_config.app.hooks, wsme=pecan_config.wsme )
def _wrap_app(app): """Wraps wsgi app with additional middlewares.""" app = request_id.RequestId(app) if CONF.audit.enabled: try: app = audit_middleware.AuditMiddleware( app, audit_map_file=CONF.audit.audit_map_file, ignore_req_list=CONF.audit.ignore_req_list ) except (EnvironmentError, OSError, audit_middleware.PycadfAuditApiConfigError) as e: raise exceptions.InputFileError( file_name=CONF.audit.audit_map_file, reason=e ) if cfg.CONF.api_settings.auth_strategy == constants.KEYSTONE: app = keystone.SkippingAuthProtocol(app, {}) app = http_proxy_to_wsgi.HTTPProxyToWSGI(app) # This should be the last middleware in the list (which results in # it being the first in the middleware chain). This is to ensure # that any errors thrown by other middleware, such as an auth # middleware - are annotated with CORS headers, and thus accessible # by the browser. app = cors.CORS(app, cfg.CONF) cors.set_defaults( allow_headers=['X-Auth-Token', 'X-Openstack-Request-Id'], allow_methods=['GET', 'PUT', 'POST', 'DELETE'], expose_headers=['X-Auth-Token', 'X-Openstack-Request-Id'] ) app = sizelimit.RequestBodySizeLimiter(app, cfg.CONF) return app