7593a6948c
Use import_class(), import_object(), and import_module() from openstack-common's importutils module. The equivalent functions have been removed from nova.utils. A few modules had import order cleaned up in passing, as well. My initial motivation for this was to remove some more usage of nova bits from nova.rpc as another step towards being able to move nova.rpc import openstack-common. Since I was pulling importutils into nova, I went ahead and converted the whole thing. Change-Id: I7c7786cf0001bcd06db52b9a99ff4284a3f6c6fa
132 lines
4.2 KiB
Python
Executable File
132 lines
4.2 KiB
Python
Executable File
#!/usr/bin/env python
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Handle lease database updates from DHCP servers.
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"""
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import gettext
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import os
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import sys
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# If ../nova/__init__.py exists, add ../ to Python search path, so that
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# it will override what happens to be installed in /usr/(local/)lib/python...
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possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
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os.pardir,
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os.pardir))
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if os.path.exists(os.path.join(possible_topdir, 'nova', '__init__.py')):
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sys.path.insert(0, possible_topdir)
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gettext.install('nova', unicode=1)
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from nova import context
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from nova import db
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from nova import flags
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from nova import log as logging
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from nova.network import linux_net
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from nova.openstack.common import importutils
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from nova import rpc
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from nova import utils
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FLAGS = flags.FLAGS
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LOG = logging.getLogger('nova.dhcpbridge')
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def add_lease(mac, ip_address):
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"""Set the IP that was assigned by the DHCP server."""
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if FLAGS.fake_rabbit:
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LOG.debug(_("leasing ip"))
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network_manager = importutils.import_object(FLAGS.network_manager)
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network_manager.lease_fixed_ip(context.get_admin_context(),
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ip_address)
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else:
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rpc.cast(context.get_admin_context(),
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"%s.%s" % (FLAGS.network_topic, FLAGS.host),
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{"method": "lease_fixed_ip",
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"args": {"address": ip_address}})
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def old_lease(mac, ip_address):
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"""Called when an old lease is recognized."""
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# NOTE(vish): We assume we heard about this lease the first time.
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# If not, we will get it the next time the lease is
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# renewed.
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pass
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def del_lease(mac, ip_address):
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"""Called when a lease expires."""
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if FLAGS.fake_rabbit:
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LOG.debug(_("releasing ip"))
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network_manager = importutils.import_object(FLAGS.network_manager)
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network_manager.release_fixed_ip(context.get_admin_context(),
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ip_address)
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else:
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rpc.cast(context.get_admin_context(),
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"%s.%s" % (FLAGS.network_topic, FLAGS.host),
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{"method": "release_fixed_ip",
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"args": {"address": ip_address}})
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def init_leases(network_id):
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"""Get the list of hosts for a network."""
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ctxt = context.get_admin_context()
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network_ref = db.network_get(ctxt, network_id)
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network_manager = importutils.import_object(FLAGS.network_manager)
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return network_manager.get_dhcp_leases(ctxt, network_ref)
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def main():
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"""Parse environment and arguments and call the approproate action."""
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flagfile = os.environ.get('FLAGFILE', FLAGS.dhcpbridge_flagfile)
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utils.default_flagfile(flagfile)
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argv = FLAGS(sys.argv)
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logging.setup()
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rpc.register_opts(FLAGS)
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if int(os.environ.get('TESTING', '0')):
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from nova.tests import fake_flags
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action = argv[1]
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if action in ['add', 'del', 'old']:
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mac = argv[2]
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ip = argv[3]
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msg = _("Called '%(action)s' for mac '%(mac)s' with ip '%(ip)s'") % \
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{"action": action,
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"mac": mac,
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"ip": ip}
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LOG.debug(msg)
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globals()[action + '_lease'](mac, ip)
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else:
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try:
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network_id = int(os.environ.get('NETWORK_ID'))
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except TypeError:
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LOG.error(_("Environment variable 'NETWORK_ID' must be set."))
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sys.exit(1)
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print init_leases(network_id)
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rpc.cleanup()
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if __name__ == "__main__":
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main()
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