/usr/bin/nova-dhcpbridge is in nova-network 2012.1.3+stable-20130423-e52e6912-0ubuntu1.4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | #!/usr/bin/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 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 log as logging
from nova import rpc
from nova import utils
from nova.network import linux_net
FLAGS = flags.FLAGS
LOG = logging.getLogger('nova.dhcpbridge')
def add_lease(mac, ip_address):
"""Set the IP that was assigned by the DHCP server."""
if FLAGS.fake_rabbit:
LOG.debug(_("leasing ip"))
network_manager = utils.import_object(FLAGS.network_manager)
network_manager.lease_fixed_ip(context.get_admin_context(),
ip_address)
else:
rpc.cast(context.get_admin_context(),
"%s.%s" % (FLAGS.network_topic, FLAGS.host),
{"method": "lease_fixed_ip",
"args": {"address": ip_address}})
def old_lease(mac, ip_address):
"""Called when an old lease is recognized."""
# NOTE(vish): We assume we heard about this lease the first time.
# If not, we will get it the next time the lease is
# renewed.
pass
def del_lease(mac, ip_address):
"""Called when a lease expires."""
if FLAGS.fake_rabbit:
LOG.debug(_("releasing ip"))
network_manager = utils.import_object(FLAGS.network_manager)
network_manager.release_fixed_ip(context.get_admin_context(),
ip_address)
else:
rpc.cast(context.get_admin_context(),
"%s.%s" % (FLAGS.network_topic, FLAGS.host),
{"method": "release_fixed_ip",
"args": {"address": ip_address}})
def init_leases(network_id):
"""Get the list of hosts for a network."""
ctxt = context.get_admin_context()
network_ref = db.network_get(ctxt, network_id)
network_manager = utils.import_object(FLAGS.network_manager)
return network_manager.get_dhcp_leases(ctxt, network_ref)
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)
logging.setup()
if int(os.environ.get('TESTING', '0')):
from nova.tests import fake_flags
action = argv[1]
if action in ['add', 'del', 'old']:
mac = argv[2]
ip = argv[3]
msg = _("Called '%(action)s' for mac '%(mac)s' with ip '%(ip)s'") % \
{"action": action,
"mac": mac,
"ip": ip}
LOG.debug(msg)
globals()[action + '_lease'](mac, ip)
else:
try:
network_id = int(os.environ.get('NETWORK_ID'))
except TypeError:
LOG.error(_("Environment variable 'NETWORK_ID' must be set."))
sys.exit(1)
print init_leases(network_id)
rpc.cleanup()
if __name__ == "__main__":
main()
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