b5990a7bd7
The cfg API is now available via the oslo-config library, so switch to it and remove the copied-and-pasted version. Add the 2013.1b3 tarball to tools/pip-requires - this will be changed to 'oslo-config>=2013.1' when oslo-config is published to pypi. This will happen in time for grizzly final. Remove the 'deps = pep8' from tox.ini as it means all the other deps get installed with easy_install which can't install oslo-config from the URL. Retain dummy cfg.py file until keystoneclient middleware has been updated (I18c450174277c8e2d15ed93879da6cd92074c27a). Change-Id: I4815aeb8a9341a31a250e920157f15ee15cfc5bc
223 lines
7.6 KiB
Python
223 lines
7.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
#
|
|
# Copyright 2012 New Dream Network, LLC (DreamHost)
|
|
#
|
|
# 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.
|
|
#
|
|
# @author: Mark McClain, DreamHost
|
|
|
|
import hashlib
|
|
import hmac
|
|
import os
|
|
import socket
|
|
import urlparse
|
|
|
|
import eventlet
|
|
import httplib2
|
|
from oslo.config import cfg
|
|
from quantumclient.v2_0 import client
|
|
import webob
|
|
|
|
from quantum.common import config
|
|
from quantum.openstack.common import log as logging
|
|
from quantum import wsgi
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
DEVICE_OWNER_ROUTER_INTF = "network:router_interface"
|
|
|
|
|
|
class MetadataProxyHandler(object):
|
|
OPTS = [
|
|
cfg.StrOpt('admin_user',
|
|
help=_("Admin user")),
|
|
cfg.StrOpt('admin_password',
|
|
help=_("Admin password"),
|
|
secret=True),
|
|
cfg.StrOpt('admin_tenant_name',
|
|
help=_("Admin tenant name")),
|
|
cfg.StrOpt('auth_url',
|
|
help=_("Authentication URL")),
|
|
cfg.StrOpt('auth_strategy', default='keystone',
|
|
help=_("The type of authentication to use")),
|
|
cfg.StrOpt('auth_region',
|
|
help=_("Authentication region")),
|
|
cfg.StrOpt('nova_metadata_ip', default='127.0.0.1',
|
|
help=_("IP address used by Nova metadata server.")),
|
|
cfg.IntOpt('nova_metadata_port',
|
|
default=8775,
|
|
help=_("TCP Port used by Nova metadata server.")),
|
|
cfg.StrOpt('metadata_proxy_shared_secret',
|
|
default='',
|
|
help=_('Shared secret to sign instance-id request'),
|
|
secret=True)
|
|
]
|
|
|
|
def __init__(self, conf):
|
|
self.conf = conf
|
|
|
|
self.qclient = client.Client(
|
|
username=self.conf.admin_user,
|
|
password=self.conf.admin_password,
|
|
tenant_name=self.conf.admin_tenant_name,
|
|
auth_url=self.conf.auth_url,
|
|
auth_strategy=self.conf.auth_strategy,
|
|
region_name=self.conf.auth_region
|
|
)
|
|
|
|
@webob.dec.wsgify(RequestClass=wsgi.Request)
|
|
def __call__(self, req):
|
|
try:
|
|
LOG.debug(_("Request: %s"), req)
|
|
|
|
instance_id = self._get_instance_id(req)
|
|
if instance_id:
|
|
return self._proxy_request(instance_id, req)
|
|
else:
|
|
return webob.exc.HTTPNotFound()
|
|
|
|
except Exception, e:
|
|
LOG.exception(_("Unexpected error."))
|
|
msg = _('An unknown error has occurred. '
|
|
'Please try your request again.')
|
|
return webob.exc.HTTPInternalServerError(explanation=unicode(msg))
|
|
|
|
def _get_instance_id(self, req):
|
|
remote_address = req.headers.get('X-Forwarded-For')
|
|
network_id = req.headers.get('X-Quantum-Network-ID')
|
|
router_id = req.headers.get('X-Quantum-Router-ID')
|
|
|
|
if network_id:
|
|
networks = [network_id]
|
|
else:
|
|
internal_ports = self.qclient.list_ports(
|
|
device_id=router_id,
|
|
device_owner=DEVICE_OWNER_ROUTER_INTF)['ports']
|
|
|
|
networks = [p['network_id'] for p in internal_ports]
|
|
|
|
ports = self.qclient.list_ports(
|
|
network_id=networks,
|
|
fixed_ips=['ip_address=%s' % remote_address])['ports']
|
|
|
|
if len(ports) == 1:
|
|
return ports[0]['device_id']
|
|
|
|
def _proxy_request(self, instance_id, req):
|
|
headers = {
|
|
'X-Forwarded-For': req.headers.get('X-Forwarded-For'),
|
|
'X-Instance-ID': instance_id,
|
|
'X-Instance-ID-Signature': self._sign_instance_id(instance_id)
|
|
}
|
|
|
|
url = urlparse.urlunsplit((
|
|
'http',
|
|
'%s:%s' % (self.conf.nova_metadata_ip,
|
|
self.conf.nova_metadata_port),
|
|
req.path_info,
|
|
req.query_string,
|
|
''))
|
|
|
|
h = httplib2.Http()
|
|
resp, content = h.request(url, headers=headers)
|
|
|
|
if resp.status == 200:
|
|
LOG.debug(str(resp))
|
|
return content
|
|
elif resp.status == 403:
|
|
msg = _(
|
|
'The remote metadata server responded with Forbidden. This '
|
|
'response usually occurs when shared secrets do not match.'
|
|
)
|
|
LOG.warn(msg)
|
|
return webob.exc.HTTPForbidden()
|
|
elif resp.status == 404:
|
|
return webob.exc.HTTPNotFound()
|
|
elif resp.status == 500:
|
|
msg = _(
|
|
'Remote metadata server experienced an internal server error.'
|
|
)
|
|
LOG.warn(msg)
|
|
return webob.exc.HTTPInternalServerError(explanation=unicode(msg))
|
|
else:
|
|
raise Exception(_('Unexpected response code: %s') % resp.status)
|
|
|
|
def _sign_instance_id(self, instance_id):
|
|
return hmac.new(self.conf.metadata_proxy_shared_secret,
|
|
instance_id,
|
|
hashlib.sha256).hexdigest()
|
|
|
|
|
|
class UnixDomainHttpProtocol(eventlet.wsgi.HttpProtocol):
|
|
def __init__(self, request, client_address, server):
|
|
if client_address == '':
|
|
client_address = ('<local>', 0)
|
|
# base class is old-style, no super does not work properly
|
|
eventlet.wsgi.HttpProtocol.__init__(self, request, client_address,
|
|
server)
|
|
|
|
|
|
class UnixDomainWSGIServer(wsgi.Server):
|
|
def start(self, application, file_socket, backlog=128):
|
|
sock = eventlet.listen(file_socket,
|
|
family=socket.AF_UNIX,
|
|
backlog=backlog)
|
|
self.pool.spawn_n(self._run, application, sock)
|
|
|
|
def _run(self, application, socket):
|
|
"""Start a WSGI service in a new green thread."""
|
|
logger = logging.getLogger('eventlet.wsgi.server')
|
|
eventlet.wsgi.server(socket,
|
|
application,
|
|
custom_pool=self.pool,
|
|
protocol=UnixDomainHttpProtocol,
|
|
log=logging.WritableLogger(logger))
|
|
|
|
|
|
class UnixDomainMetadataProxy(object):
|
|
OPTS = [
|
|
cfg.StrOpt('metadata_proxy_socket',
|
|
default='$state_path/metadata_proxy',
|
|
help=_('Location for Metadata Proxy UNIX domain socket'))
|
|
]
|
|
|
|
def __init__(self, conf):
|
|
self.conf = conf
|
|
|
|
dirname = os.path.dirname(cfg.CONF.metadata_proxy_socket)
|
|
if os.path.isdir(dirname):
|
|
try:
|
|
os.unlink(cfg.CONF.metadata_proxy_socket)
|
|
except OSError:
|
|
if os.path.exists(cfg.CONF.metadata_proxy_socket):
|
|
raise
|
|
else:
|
|
os.makedirs(dirname, 0755)
|
|
|
|
def run(self):
|
|
server = UnixDomainWSGIServer('quantum-metadata-agent')
|
|
server.start(MetadataProxyHandler(self.conf),
|
|
self.conf.metadata_proxy_socket)
|
|
server.wait()
|
|
|
|
|
|
def main():
|
|
eventlet.monkey_patch()
|
|
cfg.CONF.register_opts(UnixDomainMetadataProxy.OPTS)
|
|
cfg.CONF.register_opts(MetadataProxyHandler.OPTS)
|
|
cfg.CONF(project='quantum')
|
|
config.setup_logging(cfg.CONF)
|
|
|
|
proxy = UnixDomainMetadataProxy(cfg.CONF)
|
|
proxy.run()
|