ec83c69372
This sets up the HTTPProxyToWSGI middleware in front of Octavia API. The purpose of this middleware is to set up the request URL correctly in the case there is a proxy (For instance, a loadbalancer such as HAProxy) in front of Octavia API. So, when TLS connections are terminated at the proxy, and one tries to get the versions from the '/' resource from Octavia API, one will notice that the protocol is incorrect; It will show 'http' instead of 'https'. So this middleware handles such cases. The HTTPProxyToWSGI is off by default and needs to be enabled via a configuration value. It can be enabled with the option in octavia.conf: [oslo_middleware] enable_proxy_headers_parsing=True Story: 2005105 Task: 29732 Change-Id: I276188530a83598ed75560f02ed9d80ce9afca2f
102 lines
3.3 KiB
Python
102 lines
3.3 KiB
Python
# Copyright 2014 Rackspace
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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 keystonemiddleware.audit as audit_middleware
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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_middleware import cors
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from oslo_middleware import http_proxy_to_wsgi
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from oslo_middleware import request_id
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import pecan
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from octavia.api import config as app_config
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from octavia.api.drivers import driver_factory
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from octavia.common import constants
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from octavia.common import exceptions
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from octavia.common import keystone
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from octavia.common import service as octavia_service
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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def get_pecan_config():
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"""Returns the pecan config."""
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filename = app_config.__file__.replace('.pyc', '.py')
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return pecan.configuration.conf_from_file(filename)
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def _init_drivers():
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"""Initialize provider drivers."""
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for provider in CONF.api_settings.enabled_provider_drivers:
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driver_factory.get_driver(provider)
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def setup_app(pecan_config=None, debug=False, argv=None):
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"""Creates and returns a pecan wsgi app."""
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octavia_service.prepare_service(argv)
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cfg.CONF.log_opt_values(LOG, logging.DEBUG)
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_init_drivers()
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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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return pecan.make_app(
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pecan_config.app.root,
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wrap_app=_wrap_app,
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debug=debug,
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hooks=pecan_config.app.hooks,
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wsme=pecan_config.wsme
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)
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def _wrap_app(app):
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"""Wraps wsgi app with additional middlewares."""
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app = request_id.RequestId(app)
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if CONF.audit.enabled:
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try:
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app = audit_middleware.AuditMiddleware(
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app,
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audit_map_file=CONF.audit.audit_map_file,
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ignore_req_list=CONF.audit.ignore_req_list
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)
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except (EnvironmentError, OSError,
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audit_middleware.PycadfAuditApiConfigError) as e:
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raise exceptions.InputFileError(
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file_name=CONF.audit.audit_map_file,
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reason=e
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)
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if cfg.CONF.api_settings.auth_strategy == constants.KEYSTONE:
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app = keystone.SkippingAuthProtocol(app, {})
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app = http_proxy_to_wsgi.HTTPProxyToWSGI(app)
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# This should be the last middleware in the list (which results in
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# it being the first in the middleware chain). This is to ensure
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# that any errors thrown by other middleware, such as an auth
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# middleware - are annotated with CORS headers, and thus accessible
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# by the browser.
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app = cors.CORS(app, cfg.CONF)
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cors.set_defaults(
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allow_headers=['X-Auth-Token', 'X-Openstack-Request-Id'],
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allow_methods=['GET', 'PUT', 'POST', 'DELETE'],
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expose_headers=['X-Auth-Token', 'X-Openstack-Request-Id']
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)
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return app
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