130 lines
4.7 KiB
Python
Executable File
130 lines
4.7 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright 2010 United States Government as represented by the
|
|
# Administrator of the National Aeronautics and Space Administration.
|
|
# 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.
|
|
|
|
"""
|
|
Handle lease database updates from DHCP servers.
|
|
"""
|
|
|
|
import gettext
|
|
import logging
|
|
import os
|
|
import sys
|
|
|
|
# If ../nova/__init__.py exists, add ../ to Python search path, so that
|
|
# it will override what happens to be installed in /usr/(local/)lib/python...
|
|
possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
|
|
os.pardir,
|
|
os.pardir))
|
|
if os.path.exists(os.path.join(possible_topdir, 'nova', '__init__.py')):
|
|
sys.path.insert(0, possible_topdir)
|
|
|
|
gettext.install('nova', unicode=1)
|
|
|
|
from nova import context
|
|
from nova import db
|
|
from nova import flags
|
|
from nova import rpc
|
|
from nova import utils
|
|
from nova.network import linux_net
|
|
|
|
FLAGS = flags.FLAGS
|
|
flags.DECLARE('auth_driver', 'nova.auth.manager')
|
|
flags.DECLARE('network_size', 'nova.network.manager')
|
|
flags.DECLARE('num_networks', 'nova.network.manager')
|
|
flags.DECLARE('update_dhcp_on_disassociate', 'nova.network.manager')
|
|
|
|
|
|
def add_lease(mac, ip_address, _hostname, _interface):
|
|
"""Set the IP that was assigned by the DHCP server."""
|
|
if FLAGS.fake_rabbit:
|
|
logging.debug("leasing ip")
|
|
network_manager = utils.import_object(FLAGS.network_manager)
|
|
network_manager.lease_fixed_ip(context.get_admin_context(),
|
|
mac,
|
|
ip_address)
|
|
else:
|
|
rpc.cast(context.get_admin_context(),
|
|
"%s.%s" % (FLAGS.network_topic, FLAGS.host),
|
|
{"method": "lease_fixed_ip",
|
|
"args": {"mac": mac,
|
|
"address": ip_address}})
|
|
|
|
|
|
def old_lease(mac, ip_address, hostname, interface):
|
|
"""Update just as add lease."""
|
|
logging.debug("Adopted old lease or got a change of mac/hostname")
|
|
add_lease(mac, ip_address, hostname, interface)
|
|
|
|
|
|
def del_lease(mac, ip_address, _hostname, _interface):
|
|
"""Called when a lease expires."""
|
|
if FLAGS.fake_rabbit:
|
|
logging.debug("releasing ip")
|
|
network_manager = utils.import_object(FLAGS.network_manager)
|
|
network_manager.release_fixed_ip(context.get_admin_context(),
|
|
mac,
|
|
ip_address)
|
|
else:
|
|
rpc.cast(context.get_admin_context(),
|
|
"%s.%s" % (FLAGS.network_topic, FLAGS.host),
|
|
{"method": "release_fixed_ip",
|
|
"args": {"mac": mac,
|
|
"address": ip_address}})
|
|
|
|
|
|
def init_leases(interface):
|
|
"""Get the list of hosts for an interface."""
|
|
ctxt = context.get_admin_context()
|
|
network_ref = db.network_get_by_bridge(ctxt, interface)
|
|
return linux_net.get_dhcp_hosts(ctxt, network_ref['id'])
|
|
|
|
|
|
def main():
|
|
"""Parse environment and arguments and call the approproate action."""
|
|
flagfile = os.environ.get('FLAGFILE', FLAGS.dhcpbridge_flagfile)
|
|
utils.default_flagfile(flagfile)
|
|
argv = FLAGS(sys.argv)
|
|
interface = os.environ.get('DNSMASQ_INTERFACE', 'br0')
|
|
if int(os.environ.get('TESTING', '0')):
|
|
FLAGS.fake_rabbit = True
|
|
FLAGS.network_size = 16
|
|
FLAGS.connection_type = 'fake'
|
|
FLAGS.fake_network = True
|
|
FLAGS.auth_driver = 'nova.auth.dbdriver.DbDriver'
|
|
FLAGS.num_networks = 5
|
|
path = os.path.abspath(os.path.join(os.path.dirname(__file__),
|
|
'..',
|
|
'_trial_temp',
|
|
'nova.sqlite'))
|
|
FLAGS.sql_connection = 'sqlite:///%s' % path
|
|
action = argv[1]
|
|
if action in ['add', 'del', 'old']:
|
|
mac = argv[2]
|
|
ip = argv[3]
|
|
hostname = argv[4]
|
|
logging.debug("Called %s for mac %s with ip %s and "
|
|
"hostname %s on interface %s",
|
|
action, mac, ip, hostname, interface)
|
|
globals()[action + '_lease'](mac, ip, hostname, interface)
|
|
else:
|
|
print init_leases(interface)
|
|
|
|
if __name__ == "__main__":
|
|
main()
|