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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 OpenStack LLC
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2010 OpenStack LLC.
# 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 os
import socket
import ssl
import sys
# NOTE(mikal): All of this is because if dnspython is present in your
# environment then eventlet monkeypatches socket.getaddrinfo() with an
# implementation which doesn't work for IPv6. What we're checking here is
# that the magic environment variable was set when the import happened.
if ('eventlet' in sys.modules and
os.environ.get('EVENTLET_NO_GREENDNS', '').lower() != 'yes'):
raise ImportError('eventlet imported before '
'keystone.common.wsgi_server '
'(EVENTLET_NO_GREENDNS env var set to %s)'
% os.environ.get('EVENTLET_NO_GREENDNS'))
os.environ['EVENTLET_NO_GREENDNS'] = 'yes'
import eventlet
import eventlet.wsgi
from keystone.common import logging
from keystone.common import wsgi
LOG = logging.getLogger(__name__)
def monkey_patch_eventlet(monkeypatch_thread=None):
if monkeypatch_thread is None:
monkeypatch_thread = not os.getenv('STANDARD_THREADS')
eventlet.patcher.monkey_patch(all=False, socket=True, time=True,
thread=monkeypatch_thread)
class Server(object):
"""Server class to manage multiple WSGI sockets and applications."""
def __init__(self, application, host=None, port=None, threads=1000):
self.application = application
self.host = host or '0.0.0.0'
self.port = port or 0
self.pool = eventlet.GreenPool(threads)
self.socket_info = {}
self.greenthread = None
self.do_ssl = False
self.cert_required = False
def start(self, key=None, backlog=128):
"""Run a WSGI server with the given application."""
LOG.debug(_('Starting %(arg0)s on %(host)s:%(port)s') %
{'arg0': sys.argv[0],
'host': self.host,
'port': self.port})
# TODO(dims): eventlet's green dns/socket module does not actually
# support IPv6 in getaddrinfo(). We need to get around this in the
# future or monitor upstream for a fix
info = socket.getaddrinfo(self.host,
self.port,
socket.AF_UNSPEC,
socket.SOCK_STREAM)[0]
_socket = eventlet.listen(info[-1],
family=info[0],
backlog=backlog)
if key:
self.socket_info[key] = _socket.getsockname()
# SSL is enabled
if self.do_ssl:
if self.cert_required:
cert_reqs = ssl.CERT_REQUIRED
else:
cert_reqs = ssl.CERT_NONE
sslsocket = eventlet.wrap_ssl(_socket, certfile=self.certfile,
keyfile=self.keyfile,
server_side=True,
cert_reqs=cert_reqs,
ca_certs=self.ca_certs)
_socket = sslsocket
self.greenthread = self.pool.spawn(self._run,
self.application,
_socket)
def set_ssl(self, certfile, keyfile=None, ca_certs=None,
cert_required=True):
self.certfile = certfile
self.keyfile = keyfile
self.ca_certs = ca_certs
self.cert_required = cert_required
self.do_ssl = True
def kill(self):
if self.greenthread:
self.greenthread.kill()
def wait(self):
"""Wait until all servers have completed running."""
try:
self.pool.waitall()
except KeyboardInterrupt:
pass
def _run(self, application, socket):
"""Start a WSGI server in a new green thread."""
log = logging.getLogger('eventlet.wsgi.server')
try:
eventlet.wsgi.server(socket, application, custom_pool=self.pool,
log=wsgi.WritableLogger(log))
except Exception:
LOG.exception(_('Server error'))
raise
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