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nova /bin /nova-dhcpbridge

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#!/usr/bin/env python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# 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
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# 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
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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
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from nova import db
from nova import config
from nova import flags
from nova.network import linux_net
Add version to network rpc API. This patch adds versioning support for the nova-network rpc API. During Folsom development I added versioning to all rpc APIs with the exception of network and volume. I was holding off on those to see what the fate of that code in nova was going to be for sure. Adding it to the volume API in nova doesn't make much sense at this point (but doing it in Cinder does). Since nova-network is sticking around for a while, it seems worthwhile to add a version number to the API for any future changes while the code is still in the tree. There are plenty of things in this rpc API that could be cleaned up or improved, but I held off on doing any of those things. I would recommend the same for anyone else (unless it's a bug that needs to be fixed). I think any further improvements should be focused on Quantum integration with Nova or Quantum itself. Fixes bug 1060197. Change-Id: I63ce57657388166544202af9c44c2298ae551aea
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from nova.network import rpcapi as network_rpcapi
from nova.openstack.common import importutils
from nova.openstack.common import log as logging
from nova.openstack.common import rpc
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from nova import utils
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CONF = config.CONF
LOG = logging.getLogger('nova.dhcpbridge')
def add_lease(mac, ip_address):
"""Set the IP that was assigned by the DHCP server."""
if CONF.fake_rabbit:
LOG.debug(_("leasing ip"))
network_manager = importutils.import_object(CONF.network_manager)
network_manager.lease_fixed_ip(context.get_admin_context(),
ip_address)
else:
Add version to network rpc API. This patch adds versioning support for the nova-network rpc API. During Folsom development I added versioning to all rpc APIs with the exception of network and volume. I was holding off on those to see what the fate of that code in nova was going to be for sure. Adding it to the volume API in nova doesn't make much sense at this point (but doing it in Cinder does). Since nova-network is sticking around for a while, it seems worthwhile to add a version number to the API for any future changes while the code is still in the tree. There are plenty of things in this rpc API that could be cleaned up or improved, but I held off on doing any of those things. I would recommend the same for anyone else (unless it's a bug that needs to be fixed). I think any further improvements should be focused on Quantum integration with Nova or Quantum itself. Fixes bug 1060197. Change-Id: I63ce57657388166544202af9c44c2298ae551aea
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api = network_rpcapi.NetworkAPI()
api.lease_fixed_ip(context.get_admin_context(), ip_address, CONF.host)
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
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def del_lease(mac, ip_address):
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"""Called when a lease expires."""
if CONF.fake_rabbit:
LOG.debug(_("releasing ip"))
network_manager = importutils.import_object(CONF.network_manager)
network_manager.release_fixed_ip(context.get_admin_context(),
ip_address)
else:
Add version to network rpc API. This patch adds versioning support for the nova-network rpc API. During Folsom development I added versioning to all rpc APIs with the exception of network and volume. I was holding off on those to see what the fate of that code in nova was going to be for sure. Adding it to the volume API in nova doesn't make much sense at this point (but doing it in Cinder does). Since nova-network is sticking around for a while, it seems worthwhile to add a version number to the API for any future changes while the code is still in the tree. There are plenty of things in this rpc API that could be cleaned up or improved, but I held off on doing any of those things. I would recommend the same for anyone else (unless it's a bug that needs to be fixed). I think any further improvements should be focused on Quantum integration with Nova or Quantum itself. Fixes bug 1060197. Change-Id: I63ce57657388166544202af9c44c2298ae551aea
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api = network_rpcapi.NetworkAPI()
api.release_fixed_ip(context.get_admin_context(), ip_address,
CONF.host)
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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(CONF.network_manager)
Add DHCP support to the QuantumManager and break apart dhcp/gateway This introduces a new flag "quantum_use_dhcp=<boolean>" which indicates whether or not to enable dhcp for all of the networks. If it is set then we start dnsmasq (and provide it with the IP/MACs from Melange) similar to how this was done in linux_net before. Prior to this if you enabled dhcp then you would also get a gateway device.. some people may not want that so we now require that you specify the gateway when creating the network in order to end up with a device that will act as a gateway. If you're using Melange IPAM and you don't specify the gateway you still end up with one because it doesn't allow you to not have one. This lays the groundwork for the option of not having one in the future, at least :) Also, fix quantum/melange ipam interaction We now query for the subnets by net_id/vif_id instead of searching through all the blocks to find the right one. Both of the allocate and deallocate for instance calls are now using the vif_id -> network_id mapping instead of searching the quantum networks. get_port_by_attachment was also changed to take a net_id so that we don't have to search through all of the quantum networks to find the corresponding port. Change-Id: I6a84da35237b6c5f5cdee91ada92642103439a97
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return network_manager.get_dhcp_leases(ctxt, network_ref)
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def main():
"""Parse environment and arguments and call the approproate action."""
flagfile = os.environ.get('FLAGFILE', CONF.dhcpbridge_flagfile)
argv = config.parse_args(sys.argv, default_config_files=[flagfile])
logging.setup("nova")
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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()