626 lines
26 KiB
Python
626 lines
26 KiB
Python
"""
|
|
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
#
|
|
# Copyright 2012 Nicira Networks, Inc. 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.
|
|
#
|
|
# @author: Dan Wendlandt, Nicira, Inc
|
|
#
|
|
"""
|
|
|
|
import sys
|
|
|
|
import eventlet
|
|
from eventlet import semaphore
|
|
import netaddr
|
|
|
|
from quantum.agent.common import config
|
|
from quantum.agent.linux import external_process
|
|
from quantum.agent.linux import interface
|
|
from quantum.agent.linux import ip_lib
|
|
from quantum.agent.linux import iptables_manager
|
|
from quantum.agent.linux import utils
|
|
from quantum.common import constants as l3_constants
|
|
from quantum.common import topics
|
|
from quantum import context
|
|
from quantum import manager
|
|
from quantum.openstack.common import cfg
|
|
from quantum.openstack.common import importutils
|
|
from quantum.openstack.common import log as logging
|
|
from quantum.openstack.common import periodic_task
|
|
from quantum.openstack.common.rpc import common as rpc_common
|
|
from quantum.openstack.common.rpc import proxy
|
|
from quantum.openstack.common import service
|
|
from quantum import service as quantum_service
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
NS_PREFIX = 'qrouter-'
|
|
INTERNAL_DEV_PREFIX = 'qr-'
|
|
EXTERNAL_DEV_PREFIX = 'qg-'
|
|
|
|
|
|
class L3PluginApi(proxy.RpcProxy):
|
|
"""Agent side of the l3 agent RPC API.
|
|
|
|
API version history:
|
|
1.0 - Initial version.
|
|
|
|
"""
|
|
|
|
BASE_RPC_API_VERSION = '1.0'
|
|
|
|
def __init__(self, topic, host):
|
|
super(L3PluginApi, self).__init__(
|
|
topic=topic, default_version=self.BASE_RPC_API_VERSION)
|
|
self.host = host
|
|
|
|
def get_routers(self, context, fullsync=True, router_id=None):
|
|
"""Make a remote process call to retrieve the sync data for routers."""
|
|
router_ids = [router_id] if router_id else None
|
|
return self.call(context,
|
|
self.make_msg('sync_routers', host=self.host,
|
|
fullsync=fullsync,
|
|
router_ids=router_ids),
|
|
topic=self.topic)
|
|
|
|
def get_external_network_id(self, context):
|
|
"""Make a remote process call to retrieve the external network id.
|
|
|
|
@raise common.RemoteError: with TooManyExternalNetworks
|
|
as exc_type if there are
|
|
more than one external network
|
|
"""
|
|
return self.call(context,
|
|
self.make_msg('get_external_network_id',
|
|
host=self.host),
|
|
topic=self.topic)
|
|
|
|
|
|
class RouterInfo(object):
|
|
|
|
def __init__(self, router_id, root_helper, use_namespaces, router=None):
|
|
self.router_id = router_id
|
|
self.ex_gw_port = None
|
|
self.internal_ports = []
|
|
self.floating_ips = []
|
|
self.root_helper = root_helper
|
|
self.use_namespaces = use_namespaces
|
|
self.router = router
|
|
self.iptables_manager = iptables_manager.IptablesManager(
|
|
root_helper=root_helper,
|
|
#FIXME(danwent): use_ipv6=True,
|
|
namespace=self.ns_name())
|
|
|
|
def ns_name(self):
|
|
if self.use_namespaces:
|
|
return NS_PREFIX + self.router_id
|
|
|
|
|
|
class L3NATAgent(manager.Manager):
|
|
|
|
OPTS = [
|
|
cfg.StrOpt('root_helper', default='sudo',
|
|
help=_("Root helper application.")),
|
|
cfg.StrOpt('external_network_bridge', default='br-ex',
|
|
help=_("Name of bridge used for external network "
|
|
"traffic.")),
|
|
cfg.StrOpt('interface_driver',
|
|
help=_("The driver used to manage the virtual "
|
|
"interface.")),
|
|
cfg.IntOpt('metadata_port',
|
|
default=9697,
|
|
help=_("TCP Port used by Quantum metadata namespace "
|
|
"proxy.")),
|
|
cfg.IntOpt('send_arp_for_ha',
|
|
default=3,
|
|
help=_("Send this many gratuitous ARPs for HA setup, "
|
|
"set it below or equal to 0 to disable this "
|
|
"feature.")),
|
|
cfg.BoolOpt('use_namespaces', default=True,
|
|
help=_("Allow overlapping IP.")),
|
|
cfg.StrOpt('router_id', default='',
|
|
help=_("If namespaces is disabled, the l3 agent can only"
|
|
" confgure a router that has the matching router "
|
|
"ID.")),
|
|
cfg.BoolOpt('handle_internal_only_routers',
|
|
default=True,
|
|
help=_("Agent should implement routers with no gateway")),
|
|
cfg.StrOpt('gateway_external_network_id', default='',
|
|
help=_("UUID of external network for routers implemented "
|
|
"by the agents.")),
|
|
cfg.StrOpt('l3_agent_manager',
|
|
default='quantum.agent.l3_agent.L3NATAgent',
|
|
help=_("The Quantum L3 Agent manager.")),
|
|
]
|
|
|
|
def __init__(self, host, conf=None):
|
|
if conf:
|
|
self.conf = conf
|
|
else:
|
|
self.conf = cfg.CONF
|
|
self.router_info = {}
|
|
|
|
if not self.conf.interface_driver:
|
|
LOG.error(_('An interface driver must be specified'))
|
|
sys.exit(1)
|
|
try:
|
|
self.driver = importutils.import_object(self.conf.interface_driver,
|
|
self.conf)
|
|
except:
|
|
LOG.exception(_("Error importing interface driver '%s'"),
|
|
self.conf.interface_driver)
|
|
sys.exit(1)
|
|
self.plugin_rpc = L3PluginApi(topics.PLUGIN, host)
|
|
self.fullsync = True
|
|
self.sync_sem = semaphore.Semaphore(1)
|
|
if self.conf.use_namespaces:
|
|
self._destroy_all_router_namespaces()
|
|
super(L3NATAgent, self).__init__(host=self.conf.host)
|
|
|
|
def _destroy_all_router_namespaces(self):
|
|
"""Destroy all router namespaces on the host to eliminate
|
|
all stale linux devices, iptables rules, and namespaces.
|
|
"""
|
|
root_ip = ip_lib.IPWrapper(self.conf.root_helper)
|
|
for ns in root_ip.get_namespaces(self.conf.root_helper):
|
|
if ns.startswith(NS_PREFIX):
|
|
try:
|
|
self._destroy_router_namespace(ns)
|
|
except:
|
|
LOG.exception(_("Failed deleting namespace '%s'"), ns)
|
|
|
|
def _destroy_router_namespace(self, namespace):
|
|
ns_ip = ip_lib.IPWrapper(self.conf.root_helper,
|
|
namespace=namespace)
|
|
for d in ns_ip.get_devices(exclude_loopback=True):
|
|
if d.name.startswith(INTERNAL_DEV_PREFIX):
|
|
# device is on default bridge
|
|
self.driver.unplug(d.name, namespace=namespace,
|
|
prefix=INTERNAL_DEV_PREFIX)
|
|
elif d.name.startswith(EXTERNAL_DEV_PREFIX):
|
|
self.driver.unplug(d.name,
|
|
bridge=self.conf.external_network_bridge,
|
|
namespace=namespace,
|
|
prefix=EXTERNAL_DEV_PREFIX)
|
|
#(TODO) Address the failure for the deletion of the namespace
|
|
|
|
def _create_router_namespace(self, ri):
|
|
ip_wrapper_root = ip_lib.IPWrapper(self.conf.root_helper)
|
|
ip_wrapper = ip_wrapper_root.ensure_namespace(ri.ns_name())
|
|
ip_wrapper.netns.execute(['sysctl', '-w', 'net.ipv4.ip_forward=1'])
|
|
|
|
def _fetch_external_net_id(self):
|
|
"""Find UUID of single external network for this agent"""
|
|
if self.conf.gateway_external_network_id:
|
|
return self.conf.gateway_external_network_id
|
|
try:
|
|
return self.plugin_rpc.get_external_network_id(
|
|
context.get_admin_context())
|
|
except rpc_common.RemoteError as e:
|
|
if e.exc_type == 'TooManyExternalNetworks':
|
|
msg = _(
|
|
"The 'gateway_external_network_id' must be configured"
|
|
" if Quantum has more than one external network.")
|
|
raise Exception(msg)
|
|
else:
|
|
raise
|
|
|
|
def _router_added(self, router_id, router=None):
|
|
ri = RouterInfo(router_id, self.conf.root_helper,
|
|
self.conf.use_namespaces, router)
|
|
self.router_info[router_id] = ri
|
|
if self.conf.use_namespaces:
|
|
self._create_router_namespace(ri)
|
|
for c, r in self.metadata_filter_rules():
|
|
ri.iptables_manager.ipv4['filter'].add_rule(c, r)
|
|
for c, r in self.metadata_nat_rules():
|
|
ri.iptables_manager.ipv4['nat'].add_rule(c, r)
|
|
ri.iptables_manager.apply()
|
|
self._spawn_metadata_proxy(ri)
|
|
|
|
def _router_removed(self, router_id):
|
|
ri = self.router_info[router_id]
|
|
for c, r in self.metadata_filter_rules():
|
|
ri.iptables_manager.ipv4['filter'].remove_rule(c, r)
|
|
for c, r in self.metadata_nat_rules():
|
|
ri.iptables_manager.ipv4['nat'].remove_rule(c, r)
|
|
ri.iptables_manager.apply()
|
|
self._destroy_metadata_proxy(ri)
|
|
del self.router_info[router_id]
|
|
self._destroy_router_namespace(ri.ns_name())
|
|
|
|
def _spawn_metadata_proxy(self, router_info):
|
|
def callback(pid_file):
|
|
return ['quantum-ns-metadata-proxy',
|
|
'--pid_file=%s' % pid_file,
|
|
'--router_id=%s' % router_info.router_id,
|
|
'--state_path=%s' % self.conf.state_path]
|
|
|
|
pm = external_process.ProcessManager(
|
|
self.conf,
|
|
router_info.router_id,
|
|
self.conf.root_helper,
|
|
router_info.ns_name())
|
|
pm.enable(callback)
|
|
|
|
def _destroy_metadata_proxy(self, router_info):
|
|
pm = external_process.ProcessManager(
|
|
self.conf,
|
|
router_info.router_id,
|
|
self.conf.root_helper,
|
|
router_info.ns_name())
|
|
pm.disable()
|
|
|
|
def _set_subnet_info(self, port):
|
|
ips = port['fixed_ips']
|
|
if not ips:
|
|
raise Exception(_("Router port %s has no IP address") % port['id'])
|
|
if len(ips) > 1:
|
|
LOG.error(_("Ignoring multiple IPs on router port %s"),
|
|
port['id'])
|
|
prefixlen = netaddr.IPNetwork(port['subnet']['cidr']).prefixlen
|
|
port['ip_cidr'] = "%s/%s" % (ips[0]['ip_address'], prefixlen)
|
|
|
|
def process_router(self, ri):
|
|
|
|
ex_gw_port = self._get_ex_gw_port(ri)
|
|
internal_ports = ri.router.get(l3_constants.INTERFACE_KEY, [])
|
|
existing_port_ids = set([p['id'] for p in ri.internal_ports])
|
|
current_port_ids = set([p['id'] for p in internal_ports
|
|
if p['admin_state_up']])
|
|
new_ports = [p for p in internal_ports if
|
|
p['id'] in current_port_ids and
|
|
p['id'] not in existing_port_ids]
|
|
old_ports = [p for p in ri.internal_ports if
|
|
p['id'] not in current_port_ids]
|
|
|
|
for p in new_ports:
|
|
self._set_subnet_info(p)
|
|
ri.internal_ports.append(p)
|
|
self.internal_network_added(ri, ex_gw_port,
|
|
p['network_id'], p['id'],
|
|
p['ip_cidr'], p['mac_address'])
|
|
|
|
for p in old_ports:
|
|
ri.internal_ports.remove(p)
|
|
self.internal_network_removed(ri, ex_gw_port, p['id'],
|
|
p['ip_cidr'])
|
|
|
|
internal_cidrs = [p['ip_cidr'] for p in ri.internal_ports]
|
|
|
|
if ex_gw_port and not ri.ex_gw_port:
|
|
self._set_subnet_info(ex_gw_port)
|
|
self.external_gateway_added(ri, ex_gw_port, internal_cidrs)
|
|
elif not ex_gw_port and ri.ex_gw_port:
|
|
self.external_gateway_removed(ri, ri.ex_gw_port,
|
|
internal_cidrs)
|
|
|
|
if ri.ex_gw_port or ex_gw_port:
|
|
self.process_router_floating_ips(ri, ex_gw_port)
|
|
|
|
ri.ex_gw_port = ex_gw_port
|
|
|
|
def process_router_floating_ips(self, ri, ex_gw_port):
|
|
floating_ips = ri.router.get(l3_constants.FLOATINGIP_KEY, [])
|
|
existing_floating_ip_ids = set([fip['id'] for fip in ri.floating_ips])
|
|
cur_floating_ip_ids = set([fip['id'] for fip in floating_ips])
|
|
|
|
id_to_fip_map = {}
|
|
|
|
for fip in floating_ips:
|
|
if fip['port_id']:
|
|
if fip['id'] not in existing_floating_ip_ids:
|
|
ri.floating_ips.append(fip)
|
|
self.floating_ip_added(ri, ex_gw_port,
|
|
fip['floating_ip_address'],
|
|
fip['fixed_ip_address'])
|
|
|
|
# store to see if floatingip was remapped
|
|
id_to_fip_map[fip['id']] = fip
|
|
|
|
floating_ip_ids_to_remove = (existing_floating_ip_ids -
|
|
cur_floating_ip_ids)
|
|
for fip in ri.floating_ips:
|
|
if fip['id'] in floating_ip_ids_to_remove:
|
|
ri.floating_ips.remove(fip)
|
|
self.floating_ip_removed(ri, ri.ex_gw_port,
|
|
fip['floating_ip_address'],
|
|
fip['fixed_ip_address'])
|
|
else:
|
|
# handle remapping of a floating IP
|
|
new_fip = id_to_fip_map[fip['id']]
|
|
new_fixed_ip = new_fip['fixed_ip_address']
|
|
existing_fixed_ip = fip['fixed_ip_address']
|
|
if (new_fixed_ip and existing_fixed_ip and
|
|
new_fixed_ip != existing_fixed_ip):
|
|
floating_ip = fip['floating_ip_address']
|
|
self.floating_ip_removed(ri, ri.ex_gw_port,
|
|
floating_ip, existing_fixed_ip)
|
|
self.floating_ip_added(ri, ri.ex_gw_port,
|
|
floating_ip, new_fixed_ip)
|
|
ri.floating_ips.remove(fip)
|
|
ri.floating_ips.append(new_fip)
|
|
|
|
def _get_ex_gw_port(self, ri):
|
|
return ri.router.get('gw_port')
|
|
|
|
def _send_gratuitous_arp_packet(self, ri, interface_name, ip_address):
|
|
if self.conf.send_arp_for_ha > 0:
|
|
arping_cmd = ['arping', '-A', '-U',
|
|
'-I', interface_name,
|
|
'-c', self.conf.send_arp_for_ha,
|
|
ip_address]
|
|
try:
|
|
if self.conf.use_namespaces:
|
|
ip_wrapper = ip_lib.IPWrapper(self.conf.root_helper,
|
|
namespace=ri.ns_name())
|
|
ip_wrapper.netns.execute(arping_cmd, check_exit_code=True)
|
|
else:
|
|
utils.execute(arping_cmd, check_exit_code=True,
|
|
root_helper=self.conf.root_helper)
|
|
except Exception as e:
|
|
LOG.error(_("Failed sending gratuitous ARP: %s"), str(e))
|
|
|
|
def get_internal_device_name(self, port_id):
|
|
return (INTERNAL_DEV_PREFIX + port_id)[:self.driver.DEV_NAME_LEN]
|
|
|
|
def get_external_device_name(self, port_id):
|
|
return (EXTERNAL_DEV_PREFIX + port_id)[:self.driver.DEV_NAME_LEN]
|
|
|
|
def external_gateway_added(self, ri, ex_gw_port, internal_cidrs):
|
|
|
|
interface_name = self.get_external_device_name(ex_gw_port['id'])
|
|
ex_gw_ip = ex_gw_port['fixed_ips'][0]['ip_address']
|
|
if not ip_lib.device_exists(interface_name,
|
|
root_helper=self.conf.root_helper,
|
|
namespace=ri.ns_name()):
|
|
self.driver.plug(ex_gw_port['network_id'],
|
|
ex_gw_port['id'], interface_name,
|
|
ex_gw_port['mac_address'],
|
|
bridge=self.conf.external_network_bridge,
|
|
namespace=ri.ns_name(),
|
|
prefix=EXTERNAL_DEV_PREFIX)
|
|
self.driver.init_l3(interface_name, [ex_gw_port['ip_cidr']],
|
|
namespace=ri.ns_name())
|
|
ip_address = ex_gw_port['ip_cidr'].split('/')[0]
|
|
self._send_gratuitous_arp_packet(ri, interface_name, ip_address)
|
|
|
|
gw_ip = ex_gw_port['subnet']['gateway_ip']
|
|
if ex_gw_port['subnet']['gateway_ip']:
|
|
cmd = ['route', 'add', 'default', 'gw', gw_ip]
|
|
if self.conf.use_namespaces:
|
|
ip_wrapper = ip_lib.IPWrapper(self.conf.root_helper,
|
|
namespace=ri.ns_name())
|
|
ip_wrapper.netns.execute(cmd, check_exit_code=False)
|
|
else:
|
|
utils.execute(cmd, check_exit_code=False,
|
|
root_helper=self.conf.root_helper)
|
|
|
|
for (c, r) in self.external_gateway_nat_rules(ex_gw_ip,
|
|
internal_cidrs,
|
|
interface_name):
|
|
ri.iptables_manager.ipv4['nat'].add_rule(c, r)
|
|
ri.iptables_manager.apply()
|
|
|
|
def external_gateway_removed(self, ri, ex_gw_port, internal_cidrs):
|
|
|
|
interface_name = self.get_external_device_name(ex_gw_port['id'])
|
|
if ip_lib.device_exists(interface_name,
|
|
root_helper=self.conf.root_helper,
|
|
namespace=ri.ns_name()):
|
|
self.driver.unplug(interface_name,
|
|
bridge=self.conf.external_network_bridge,
|
|
namespace=ri.ns_name(),
|
|
prefix=EXTERNAL_DEV_PREFIX)
|
|
|
|
ex_gw_ip = ex_gw_port['fixed_ips'][0]['ip_address']
|
|
for c, r in self.external_gateway_nat_rules(ex_gw_ip, internal_cidrs,
|
|
interface_name):
|
|
ri.iptables_manager.ipv4['nat'].remove_rule(c, r)
|
|
ri.iptables_manager.apply()
|
|
|
|
def metadata_filter_rules(self):
|
|
rules = []
|
|
rules.append(('INPUT', '-s 0.0.0.0/0 -d 127.0.0.1 '
|
|
'-p tcp -m tcp --dport %s '
|
|
'-j ACCEPT' % self.conf.metadata_port))
|
|
return rules
|
|
|
|
def metadata_nat_rules(self):
|
|
rules = []
|
|
rules.append(('PREROUTING', '-s 0.0.0.0/0 -d 169.254.169.254/32 '
|
|
'-p tcp -m tcp --dport 80 -j REDIRECT '
|
|
'--to-port %s' % self.conf.metadata_port))
|
|
return rules
|
|
|
|
def external_gateway_nat_rules(self, ex_gw_ip, internal_cidrs,
|
|
interface_name):
|
|
rules = [('POSTROUTING', '! -i %(interface_name)s '
|
|
'! -o %(interface_name)s -m conntrack ! '
|
|
'--ctstate DNAT -j ACCEPT' % locals())]
|
|
for cidr in internal_cidrs:
|
|
rules.extend(self.internal_network_nat_rules(ex_gw_ip, cidr))
|
|
return rules
|
|
|
|
def internal_network_added(self, ri, ex_gw_port, network_id, port_id,
|
|
internal_cidr, mac_address):
|
|
interface_name = self.get_internal_device_name(port_id)
|
|
if not ip_lib.device_exists(interface_name,
|
|
root_helper=self.conf.root_helper,
|
|
namespace=ri.ns_name()):
|
|
self.driver.plug(network_id, port_id, interface_name, mac_address,
|
|
namespace=ri.ns_name(),
|
|
prefix=INTERNAL_DEV_PREFIX)
|
|
|
|
self.driver.init_l3(interface_name, [internal_cidr],
|
|
namespace=ri.ns_name())
|
|
ip_address = internal_cidr.split('/')[0]
|
|
self._send_gratuitous_arp_packet(ri, interface_name, ip_address)
|
|
|
|
if ex_gw_port:
|
|
ex_gw_ip = ex_gw_port['fixed_ips'][0]['ip_address']
|
|
for c, r in self.internal_network_nat_rules(ex_gw_ip,
|
|
internal_cidr):
|
|
ri.iptables_manager.ipv4['nat'].add_rule(c, r)
|
|
ri.iptables_manager.apply()
|
|
|
|
def internal_network_removed(self, ri, ex_gw_port, port_id, internal_cidr):
|
|
interface_name = self.get_internal_device_name(port_id)
|
|
if ip_lib.device_exists(interface_name,
|
|
root_helper=self.conf.root_helper,
|
|
namespace=ri.ns_name()):
|
|
self.driver.unplug(interface_name, namespace=ri.ns_name(),
|
|
prefix=INTERNAL_DEV_PREFIX)
|
|
|
|
if ex_gw_port:
|
|
ex_gw_ip = ex_gw_port['fixed_ips'][0]['ip_address']
|
|
for c, r in self.internal_network_nat_rules(ex_gw_ip,
|
|
internal_cidr):
|
|
ri.iptables_manager.ipv4['nat'].remove_rule(c, r)
|
|
ri.iptables_manager.apply()
|
|
|
|
def internal_network_nat_rules(self, ex_gw_ip, internal_cidr):
|
|
rules = [('snat', '-s %s -j SNAT --to-source %s' %
|
|
(internal_cidr, ex_gw_ip))]
|
|
return rules
|
|
|
|
def floating_ip_added(self, ri, ex_gw_port, floating_ip, fixed_ip):
|
|
ip_cidr = str(floating_ip) + '/32'
|
|
interface_name = self.get_external_device_name(ex_gw_port['id'])
|
|
device = ip_lib.IPDevice(interface_name, self.conf.root_helper,
|
|
namespace=ri.ns_name())
|
|
|
|
if ip_cidr not in [addr['cidr'] for addr in device.addr.list()]:
|
|
net = netaddr.IPNetwork(ip_cidr)
|
|
device.addr.add(net.version, ip_cidr, str(net.broadcast))
|
|
self._send_gratuitous_arp_packet(ri, interface_name, floating_ip)
|
|
|
|
for chain, rule in self.floating_forward_rules(floating_ip, fixed_ip):
|
|
ri.iptables_manager.ipv4['nat'].add_rule(chain, rule)
|
|
ri.iptables_manager.apply()
|
|
|
|
def floating_ip_removed(self, ri, ex_gw_port, floating_ip, fixed_ip):
|
|
ip_cidr = str(floating_ip) + '/32'
|
|
net = netaddr.IPNetwork(ip_cidr)
|
|
interface_name = self.get_external_device_name(ex_gw_port['id'])
|
|
|
|
device = ip_lib.IPDevice(interface_name, self.conf.root_helper,
|
|
namespace=ri.ns_name())
|
|
device.addr.delete(net.version, ip_cidr)
|
|
|
|
for chain, rule in self.floating_forward_rules(floating_ip, fixed_ip):
|
|
ri.iptables_manager.ipv4['nat'].remove_rule(chain, rule)
|
|
ri.iptables_manager.apply()
|
|
|
|
def floating_forward_rules(self, floating_ip, fixed_ip):
|
|
return [('PREROUTING', '-d %s -j DNAT --to %s' %
|
|
(floating_ip, fixed_ip)),
|
|
('OUTPUT', '-d %s -j DNAT --to %s' %
|
|
(floating_ip, fixed_ip)),
|
|
('float-snat', '-s %s -j SNAT --to %s' %
|
|
(fixed_ip, floating_ip))]
|
|
|
|
def router_deleted(self, context, router_id):
|
|
"""Deal with router deletion RPC message."""
|
|
with self.sync_sem:
|
|
if router_id in self.router_info:
|
|
try:
|
|
self._router_removed(router_id)
|
|
except Exception:
|
|
msg = _("Failed dealing with router "
|
|
"'%s' deletion RPC message")
|
|
LOG.debug(msg, router_id)
|
|
self.fullsync = True
|
|
|
|
def routers_updated(self, context, routers):
|
|
"""Deal with routers modification and creation RPC message."""
|
|
if not routers:
|
|
return
|
|
with self.sync_sem:
|
|
try:
|
|
self._process_routers(routers)
|
|
except Exception:
|
|
msg = _("Failed dealing with routers update RPC message")
|
|
LOG.debug(msg)
|
|
self.fullsync = True
|
|
|
|
def _process_routers(self, routers):
|
|
if (self.conf.external_network_bridge and
|
|
not ip_lib.device_exists(self.conf.external_network_bridge)):
|
|
LOG.error(_("The external network bridge '%s' does not exist"),
|
|
self.conf.external_network_bridge)
|
|
return
|
|
|
|
target_ex_net_id = self._fetch_external_net_id()
|
|
|
|
for r in routers:
|
|
if not r['admin_state_up']:
|
|
continue
|
|
|
|
# If namespaces are disabled, only process the router associated
|
|
# with the configured agent id.
|
|
if (not self.conf.use_namespaces and
|
|
r['id'] != self.conf.router_id):
|
|
continue
|
|
|
|
ex_net_id = (r['external_gateway_info'] or {}).get('network_id')
|
|
if not ex_net_id and not self.conf.handle_internal_only_routers:
|
|
continue
|
|
|
|
if ex_net_id and ex_net_id != target_ex_net_id:
|
|
continue
|
|
|
|
if r['id'] not in self.router_info:
|
|
self._router_added(r['id'])
|
|
|
|
ri = self.router_info[r['id']]
|
|
ri.router = r
|
|
self.process_router(ri)
|
|
|
|
@periodic_task.periodic_task
|
|
def _sync_routers_task(self, context):
|
|
# we need to sync with router deletion RPC message
|
|
with self.sync_sem:
|
|
if self.fullsync:
|
|
try:
|
|
if not self.conf.use_namespaces:
|
|
router_id = self.conf.router_id
|
|
else:
|
|
router_id = None
|
|
routers = self.plugin_rpc.get_routers(
|
|
context, router_id)
|
|
self.router_info = {}
|
|
self._process_routers(routers)
|
|
self.fullsync = False
|
|
except Exception:
|
|
LOG.exception(_("Failed synchronizing routers"))
|
|
self.fullsync = True
|
|
|
|
def after_start(self):
|
|
LOG.info(_("L3 agent started"))
|
|
|
|
|
|
def main():
|
|
eventlet.monkey_patch()
|
|
conf = cfg.CONF
|
|
conf.register_opts(L3NATAgent.OPTS)
|
|
conf.register_opts(interface.OPTS)
|
|
conf.register_opts(external_process.OPTS)
|
|
conf()
|
|
config.setup_logging(conf)
|
|
server = quantum_service.Service.create(binary='quantum-l3-agent',
|
|
topic=topics.L3_AGENT)
|
|
service.launch(server).wait()
|