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/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 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.network import linux_net
from nova.openstack.common import importutils
from nova.openstack.common import log as logging
from nova.openstack.common import rpc
from nova import utils
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 = importutils.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 = importutils.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 = importutils.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)
argv = flags.parse_args(sys.argv)
logging.setup("nova")
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()
|
