aodh/ceilometer/api/app.py
Lianhao Lu 0e26faeb69 Corrected import order
Enabled H306 in tox.ini and corrected the import order.

Change-Id: If77984e8c62b0ec0cfb3d068e9c1b0d4d7c3583d
2013-11-13 14:41:33 +08:00

131 lines
4.0 KiB
Python

# -*- encoding: utf-8 -*-
#
# Copyright © 2012 New Dream Network, LLC (DreamHost)
#
# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
#
# 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
import os
from wsgiref import simple_server
from oslo.config import cfg
import pecan
from ceilometer.api import acl
from ceilometer.api import config as api_config
from ceilometer.api import hooks
from ceilometer.api import middleware
from ceilometer.openstack.common import log
from ceilometer import service
from ceilometer import storage
LOG = log.getLogger(__name__)
auth_opts = [
cfg.StrOpt('auth_strategy',
default='keystone',
help='The strategy to use for auth: noauth or keystone.'),
cfg.BoolOpt('enable_v1_api',
default=True,
help='Deploy the deprecated v1 API.'),
]
CONF = cfg.CONF
CONF.register_opts(auth_opts)
def get_pecan_config():
# Set up the pecan configuration
filename = api_config.__file__.replace('.pyc', '.py')
return pecan.configuration.conf_from_file(filename)
def setup_app(pecan_config=None, extra_hooks=None):
storage_engine = storage.get_engine(cfg.CONF)
# FIXME: Replace DBHook with a hooks.TransactionHook
app_hooks = [hooks.ConfigHook(),
hooks.DBHook(
storage_engine,
storage_engine.get_connection(cfg.CONF),
),
hooks.PipelineHook(),
hooks.TranslationHook()]
if extra_hooks:
app_hooks.extend(extra_hooks)
if not pecan_config:
pecan_config = get_pecan_config()
pecan.configuration.set_config(dict(pecan_config), overwrite=True)
app = pecan.make_app(
pecan_config.app.root,
static_root=pecan_config.app.static_root,
template_path=pecan_config.app.template_path,
debug=CONF.debug,
force_canonical=getattr(pecan_config.app, 'force_canonical', True),
hooks=app_hooks,
wrap_app=middleware.ParsableErrorMiddleware,
guess_content_type_from_ext=False
)
if pecan_config.app.enable_acl:
return acl.install(app, cfg.CONF)
return app
class VersionSelectorApplication(object):
def __init__(self):
pc = get_pecan_config()
pc.app.enable_acl = (CONF.auth_strategy == 'keystone')
if cfg.CONF.enable_v1_api:
from ceilometer.api.v1 import app as v1app
self.v1 = v1app.make_app(cfg.CONF, enable_acl=pc.app.enable_acl)
else:
def not_found(environ, start_response):
start_response('404 Not Found', [])
return []
self.v1 = not_found
self.v2 = setup_app(pecan_config=pc)
def __call__(self, environ, start_response):
if environ['PATH_INFO'].startswith('/v1/'):
return self.v1(environ, start_response)
return self.v2(environ, start_response)
def start():
service.prepare_service()
# Build the WSGI app
root = VersionSelectorApplication()
# Create the WSGI server and start it
host, port = cfg.CONF.api.host, cfg.CONF.api.port
srv = simple_server.make_server(host, port, root)
LOG.info('Starting server in PID %s' % os.getpid())
LOG.info("Configuration:")
cfg.CONF.log_opt_values(LOG, logging.INFO)
if host == '0.0.0.0':
LOG.info('serving on 0.0.0.0:%s, view at http://127.0.0.1:%s' %
(port, port))
else:
LOG.info("serving on http://%s:%s" % (host, port))
srv.serve_forever()