openstack
/
neutron
Code Issues Proposed changes

DVR: Configure centralized floatingips to snat_namespace. 

This patch is the agent side patch that takes care of configuring
the centralized floatingips for the unbound ports in the snat_namespace.

Change-Id: I595ce4d6520adfd57bacbdf20ed03ffefd0b190a
Closes-Bug: #1583694
This commit is contained in:
Swaminathan Vasudevan 2016-05-31 15:21:37 -07:00 committed by Swaminathan Vasudevan
parent 5d5ebd0bd9
commit 8b4bb9c0b0
7 changed files with 275 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

90
neutron/agent/l3/dvr_edge_router.py
View File

@ -21,6 +21,7 @@ from neutron.agent.l3 import dvr_snat_ns
from neutron.agent.l3 import router_info as router
from neutron.agent.linux import ip_lib
from neutron.agent.linux import iptables_manager
from neutron.common import constants as n_const
LOG = logging.getLogger(__name__)
@ -260,3 +261,92 @@ class DvrEdgeRouter(dvr_local_router.DvrLocalRouter):
bridge=self.agent_conf.external_network_bridge,
namespace=self.snat_namespace.name,
prefix=router.EXTERNAL_DEV_PREFIX)
def get_snat_external_device_interface_name(self, ex_gw_port):
long_name = router.EXTERNAL_DEV_PREFIX + ex_gw_port['id']
return long_name[:self.driver.DEV_NAME_LEN]
def _get_centralized_fip_cidr_set(self):
"""Returns the fip_cidr set for centralized floatingips."""
interface_name = self.get_snat_external_device_interface_name(
self.get_ex_gw_port())
device = ip_lib.IPDevice(
interface_name, namespace=self.snat_namespace.name)
return set([addr['cidr'] for addr in device.addr.list()])
def get_router_cidrs(self, device):
"""Over-ride the get_router_cidrs function to return the list.
This function is overridden to provide the complete list of
floating_ip cidrs that the router hosts.
This includes the centralized floatingip cidr list and the
regular floatingip cidr list that are bound to fip namespace.
"""
fip_cidrs = super(DvrEdgeRouter, self).get_router_cidrs(device)
centralized_cidrs = set()
if self.get_ex_gw_port():
centralized_cidrs = self._get_centralized_fip_cidr_set()
return fip_cidrs | centralized_cidrs
def remove_centralized_floatingip(self, fip_cidr):
"""Function to handle the centralized Floatingip remove."""
if not self.get_ex_gw_port():
return
if not self._is_this_snat_host():
return
interface_name = self.get_snat_external_device_interface_name(
self.get_ex_gw_port())
device = ip_lib.IPDevice(
interface_name, namespace=self.snat_namespace.name)
device.delete_addr_and_conntrack_state(fip_cidr)
self.process_floating_ip_nat_rules_for_centralized_floatingip()
def add_centralized_floatingip(self, fip, fip_cidr):
"""Function to handle the centralized Floatingip addition."""
if not self.get_ex_gw_port():
return
if not self._is_this_snat_host():
return
interface_name = self.get_snat_external_device_interface_name(
self.get_ex_gw_port())
device = ip_lib.IPDevice(
interface_name, namespace=self.snat_namespace.name)
try:
device.addr.add(fip_cidr)
except RuntimeError:
LOG.warning("Unable to configure IP address for centralized "
"floating IP: %s", fip['id'])
return lib_constants.FLOATINGIP_STATUS_ERROR
self.process_floating_ip_nat_rules_for_centralized_floatingip()
# Send a GARP message on the external interface for the
# centralized floatingip configured.
ip_lib.send_ip_addr_adv_notif(self.snat_namespace.name,
interface_name,
fip['floating_ip_address'],
self.agent_conf)
return lib_constants.FLOATINGIP_STATUS_ACTIVE
def _centralized_floating_forward_rules(self, floating_ip, fixed_ip):
return [('PREROUTING', '-d %s/32 -j DNAT --to-destination %s' %
(floating_ip, fixed_ip)),
('OUTPUT', '-d %s/32 -j DNAT --to-destination %s' %
(floating_ip, fixed_ip)),
('float-snat', '-s %s/32 -j SNAT --to-source %s' %
(fixed_ip, floating_ip))]
def _set_floating_ip_nat_rules_for_centralized_floatingip(self, fip):
if fip.get(n_const.DVR_SNAT_BOUND):
fixed = fip['fixed_ip_address']
fip_ip = fip['floating_ip_address']
for chain, rule in self._centralized_floating_forward_rules(
fip_ip, fixed):
self.snat_iptables_manager.ipv4['nat'].add_rule(
chain, rule, tag='floating_ip')
def process_floating_ip_nat_rules_for_centralized_floatingip(self):
self.snat_iptables_manager.ipv4['nat'].clear_rules_by_tag(
'floating_ip')
floating_ips = self.get_floating_ips()
for fip in floating_ips:
self._set_floating_ip_nat_rules_for_centralized_floatingip(fip)
self.snat_iptables_manager.apply()

52
neutron/agent/l3/dvr_local_router.py
View File

@ -43,24 +43,23 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
super(DvrLocalRouter, self).__init__(host, *args, **kwargs)
self.floating_ips_dict = {}
self.centralized_floatingips_set = set()
# Linklocal subnet for router and floating IP namespace link
self.rtr_fip_subnet = None
self.rtr_fip_connect = False
self.fip_ns = None
self._pending_arp_set = set()
def get_floating_ips(self):
"""Filter Floating IPs to be hosted on this agent."""
floating_ips = super(DvrLocalRouter, self).get_floating_ips()
return [i for i in floating_ips if (
(i['host'] == self.host) or
(i.get('dest_host') == self.host))]
def floating_forward_rules(self, floating_ip, fixed_ip):
def floating_forward_rules(self, fip):
"""Override this function defined in router_info for dvr routers."""
if not self.fip_ns:
return []
if fip.get(n_const.DVR_SNAT_BOUND):
return []
fixed_ip = fip['fixed_ip_address']
floating_ip = fip['floating_ip_address']
rtr_2_fip_name = self.fip_ns.get_rtr_ext_device_name(self.router_id)
dnat_from_floatingip_to_fixedip = (
'PREROUTING', '-d %s/32 -i %s -j DNAT --to-destination %s' % (
@ -83,8 +82,25 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
'FORWARD', '-s %s/32 -j $float-snat' % fixed_ip)
return [mark_traffic_to_floating_ip, mark_traffic_from_fixed_ip]
def add_centralized_floatingip(self, fip, fip_cidr):
"""Implements floatingip in centralized network node.
This is a dummy function and is overridden in dvr_edge_router.py
to add the floatingip function to the snat namespace.
"""
def remove_centralized_floatingip(self, fip_cidr):
"""Removes floatingip from centralized network node.
This is a dummy function and is overridden in dvr_edge_router.py
to remove the floatingip function from the snat namespace.
"""
def floating_ip_added_dist(self, fip, fip_cidr):
"""Add floating IP to FIP namespace."""
if fip.get(n_const.DVR_SNAT_BOUND):
floating_ip_status = self.add_centralized_floatingip(fip, fip_cidr)
if floating_ip_status == lib_constants.FLOATINGIP_STATUS_ACTIVE:
self.centralized_floatingips_set.add(fip_cidr)
return floating_ip_status
floating_ip = fip['floating_ip_address']
fixed_ip = fip['fixed_ip_address']
self._add_floating_ip_rule(floating_ip, fixed_ip)
@ -103,6 +119,7 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
ip_lib.send_ip_addr_adv_notif(fip_ns_name,
interface_name,
floating_ip)
return lib_constants.FLOATINGIP_STATUS_ACTIVE
def _add_floating_ip_rule(self, floating_ip, fixed_ip):
rule_pr = self.fip_ns.allocate_rule_priority(floating_ip)
@ -124,6 +141,10 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
def floating_ip_removed_dist(self, fip_cidr):
"""Remove floating IP from FIP namespace."""
if fip_cidr in self.centralized_floatingips_set:
self.remove_centralized_floatingip(fip_cidr)
self.centralized_floatingips_set.remove(fip_cidr)
return
floating_ip = fip_cidr.split('/')[0]
fip_2_rtr_name = self.fip_ns.get_int_device_name(self.router_id)
if self.rtr_fip_subnet is None:
@ -147,8 +168,7 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
def add_floating_ip(self, fip, interface_name, device):
# Special Handling for DVR - update FIP namespace
ip_cidr = common_utils.ip_to_cidr(fip['floating_ip_address'])
self.floating_ip_added_dist(fip, ip_cidr)
return lib_constants.FLOATINGIP_STATUS_ACTIVE
return self.floating_ip_added_dist(fip, ip_cidr)
def remove_floating_ip(self, device, ip_cidr):
self.floating_ip_removed_dist(ip_cidr)
@ -417,7 +437,13 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
return next(
(p for p in fip_ports if p['network_id'] == ext_net_id), None)
def get_snat_external_device_interface_name(self, port_id):
pass
def get_external_device_interface_name(self, ex_gw_port):
floating_ips = self.get_floating_ips()
if not self._get_floatingips_bound_to_host(floating_ips):
return self.get_snat_external_device_interface_name(ex_gw_port)
fip_int = self.fip_ns.get_int_device_name(self.router_id)
if ip_lib.device_exists(fip_int, namespace=self.fip_ns.get_name()):
return self.fip_ns.get_rtr_ext_device_name(self.router_id)
@ -519,6 +545,12 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
ext_scope_mark)
return ports_scopemark
def _get_floatingips_bound_to_host(self, floating_ips):
"""Filter Floating IPs to be hosted on this agent."""
return [i for i in floating_ips
if (i['host'] == self.host or
i.get('dest_host') == self.host)]
def process_external(self):
ex_gw_port = self.get_ex_gw_port()
if ex_gw_port:

8
neutron/agent/l3/router_info.py
View File

@ -161,7 +161,9 @@ class RouterInfo(object):
"""Filter Floating IPs to be hosted on this agent."""
return self.router.get(lib_constants.FLOATINGIP_KEY, [])
def floating_forward_rules(self, floating_ip, fixed_ip):
def floating_forward_rules(self, fip):
fixed_ip = fip['fixed_ip_address']
floating_ip = fip['floating_ip_address']
return [('PREROUTING', '-d %s/32 -j DNAT --to-destination %s' %
(floating_ip, fixed_ip)),
('OUTPUT', '-d %s/32 -j DNAT --to-destination %s' %
@ -215,9 +217,7 @@ class RouterInfo(object):
# Loop once to ensure that floating ips are configured.
for fip in floating_ips:
# Rebuild iptables rules for the floating ip.
fixed = fip['fixed_ip_address']
fip_ip = fip['floating_ip_address']
for chain, rule in self.floating_forward_rules(fip_ip, fixed):
for chain, rule in self.floating_forward_rules(fip):
self.iptables_manager.ipv4['nat'].add_rule(chain, rule,
tag='floating_ip')

23
neutron/tests/functional/agent/l3/test_dvr_router.py
View File

@ -445,6 +445,7 @@ class TestDvrRouter(framework.L3AgentTestFramework):
enable_ha=False,
enable_snat=False,
enable_gw=True,
snat_bound_fip=False,
agent=None,
extra_routes=False,
enable_floating_ip=True,
@ -465,6 +466,9 @@ class TestDvrRouter(framework.L3AgentTestFramework):
if enable_floating_ip:
floating_ip = router['_floatingips'][0]
floating_ip['host'] = agent.conf.host
if snat_bound_fip:
floating_ip[n_const.DVR_SNAT_BOUND] = True
if enable_gw:
external_gw_port = router['gw_port']
router['gw_port'][portbindings.HOST_ID] = agent.conf.host
@ -481,6 +485,7 @@ class TestDvrRouter(framework.L3AgentTestFramework):
floating_ip['port_id'] = internal_ports[0]['id']
floating_ip['status'] = 'ACTIVE'
if not snat_bound_fip:
self._add_fip_agent_gw_port_info_to_router(router,
external_gw_port)
return router
@ -683,10 +688,7 @@ class TestDvrRouter(framework.L3AgentTestFramework):
# In the router namespace, check the iptables rules are set correctly
for fip in floating_ips:
floatingip = fip['floating_ip_address']
fixedip = fip['fixed_ip_address']
expected_rules = router.floating_forward_rules(floatingip,
fixedip)
expected_rules = router.floating_forward_rules(fip)
self._assert_iptables_rules_exist(
router.iptables_manager, 'nat', expected_rules)
@ -986,6 +988,19 @@ class TestDvrRouter(framework.L3AgentTestFramework):
internal_dev_name, namespace=snat_ns)
return qg_device_created_successfully, sg_device_created_successfully
def test_snat_bound_floating_ip(self):
"""Test to validate the snat bound floatingip lifecycle."""
self.agent.conf.agent_mode = lib_constants.L3_AGENT_MODE_DVR_SNAT
router_info = self.generate_dvr_router_info(snat_bound_fip=True)
router1 = self.manage_router(self.agent, router_info)
snat_bound_floatingips = router_info[lib_constants.FLOATINGIP_KEY]
self._assert_snat_namespace_exists(router1)
# In the snat namespace, check the iptables rules are set correctly
for fip in snat_bound_floatingips:
expected_rules = router1.floating_forward_rules(fip)
self._assert_iptables_rules_exist(
router1.snat_iptables_manager, 'nat', expected_rules)
def test_dvr_router_snat_namespace_with_interface_remove(self):
"""Test to validate the snat namespace with interface remove.

72
neutron/tests/unit/agent/l3/test_agent.py
View File

@ -1182,6 +1182,8 @@ class TestBasicRouterOperations(BasicRouterOperationsFramework):
fip_gw_port.return_value = agent_gateway_port[0]
ri.create_dvr_external_gateway_on_agent(ext_gw_port)
ri.connect_rtr_2_fip()
ri._get_floatingips_bound_to_host = mock.Mock(
return_value=True)
self.assertTrue(fip_gw_port.called)
self.assertTrue(create_fip.called)
self.assertEqual(agent_gateway_port[0],
@ -1200,6 +1202,72 @@ class TestBasicRouterOperations(BasicRouterOperationsFramework):
create_fip.assert_called_once_with()
self.assertEqual(1, ri.fip_ns.create_rtr_2_fip_link.call_count)
@mock.patch.object(lla.LinkLocalAllocator, '_write')
def test_floating_ip_centralized(self, lla_write):
fake_network_id = _uuid()
subnet_id = _uuid()
fake_floatingips = {'floatingips': [
{'id': _uuid(),
'floating_ip_address': '20.0.0.3',
'fixed_ip_address': '192.168.0.1',
'floating_network_id': _uuid(),
'port_id': _uuid(),
'dvr_snat_bound': True,
'host': None}]}
agent_gateway_port = (
[{'fixed_ips': [
{'ip_address': '20.0.0.30',
'prefixlen': 24,
'subnet_id': subnet_id}],
'subnets': [
{'id': subnet_id,
'cidr': '20.0.0.0/24',
'gateway_ip': '20.0.0.1'}],
'id': _uuid(),
'network_id': fake_network_id,
'mac_address': 'ca:fe:de:ad:be:ef'}]
)
router = l3_test_common.prepare_router_data(enable_snat=True)
router[lib_constants.FLOATINGIP_KEY] = fake_floatingips['floatingips']
router[n_const.FLOATINGIP_AGENT_INTF_KEY] = agent_gateway_port
router['distributed'] = True
agent = l3_agent.L3NATAgent(HOSTNAME, self.conf)
self._set_ri_kwargs(agent, router['id'], router)
ri = dvr_router.DvrEdgeRouter(HOSTNAME, **self.ri_kwargs)
ext_gw_port = ri.router.get('gw_port')
ri.fip_ns = agent.get_fip_ns(ext_gw_port['network_id'])
agent.process_router_add = mock.Mock()
ri.fip_ns.create_rtr_2_fip_link = mock.Mock()
with mock.patch.object(ri, 'get_floating_ips') as fips, \
mock.patch.object(ri,
'add_centralized_floatingip') as add_fip, \
mock.patch.object(ri, 'get_floating_agent_gw_interface'
) as fip_gw_port, \
mock.patch.object(ri.fip_ns,
'create') as create_fip, \
mock.patch.object(ri,
'remove_centralized_floatingip') as rem_fip:
fips.return_value = fake_floatingips
fip_gw_port.return_value = agent_gateway_port[0]
add_fip.return_value = lib_constants.FLOATINGIP_STATUS_ACTIVE
ri.create_dvr_external_gateway_on_agent(ext_gw_port)
ri.connect_rtr_2_fip()
self.assertTrue(fip_gw_port.called)
self.assertTrue(create_fip.called)
self.assertEqual(agent_gateway_port[0],
ri.fip_ns.agent_gateway_port)
self.assertTrue(ri.rtr_fip_connect)
# Now let us associate the fip to the router
status = ri.floating_ip_added_dist(fips, "192.168.0.1/32")
add_fip.assert_called_once_with(fips, "192.168.0.1/32")
self.assertEqual(lib_constants.FLOATINGIP_STATUS_ACTIVE, status)
self.assertEqual(set(["192.168.0.1/32"]),
ri.centralized_floatingips_set)
ri.floating_ip_removed_dist("192.168.0.1/32")
rem_fip.assert_called_once_with("192.168.0.1/32")
self.assertEqual(set([]), ri.centralized_floatingips_set)
@mock.patch.object(lla.LinkLocalAllocator, '_write')
def test_create_dvr_fip_interfaces_for_late_binding(self, lla_write):
fake_network_id = _uuid()
@ -1291,6 +1359,8 @@ class TestBasicRouterOperations(BasicRouterOperationsFramework):
fip_gw_port.return_value = agent_gateway_port[0]
ri.create_dvr_external_gateway_on_agent(ext_gw_port)
ri.connect_rtr_2_fip()
ri._get_floatingips_bound_to_host = mock.Mock(
return_value=True)
self.assertTrue(fip_gw_port.called)
self.assertEqual(agent_gateway_port[0],
ri.fip_ns.agent_gateway_port)
@ -1339,6 +1409,8 @@ class TestBasicRouterOperations(BasicRouterOperationsFramework):
fip_gw_port.return_value = agent_gateway_port[0]
ri.create_dvr_external_gateway_on_agent(ext_gw_port)
ri.connect_rtr_2_fip()
ri._get_floatingips_bound_to_host = mock.Mock(
return_value=True)
self.assertTrue(fip_gw_port.called)
self.assertEqual(agent_gateway_port[0],
ri.fip_ns.agent_gateway_port)

39
neutron/tests/unit/agent/l3/test_dvr_local_router.py
View File

@ -21,6 +21,7 @@ from oslo_log import log
from oslo_utils import uuidutils
from neutron.agent.l3 import agent as l3_agent
from neutron.agent.l3 import dvr_edge_router as dvr_edge_rtr
from neutron.agent.l3 import dvr_local_router as dvr_router
from neutron.agent.l3 import link_local_allocator as lla
from neutron.agent.l3 import router_info
@ -178,6 +179,7 @@ class TestDvrRouterOperations(base.BaseTestCase):
ri.rtr_fip_connect = True
ex_gw_port = {'network_id': 'fake_net_id'}
ri.create_dvr_external_gateway_on_agent(ex_gw_port)
ri._get_floatingips_bound_to_host = mock.Mock(return_value=True)
ri.fip_ns.create_or_update_gateway_port.assert_called_once_with(
fip_agent_port)
@ -231,16 +233,16 @@ class TestDvrRouterOperations(base.BaseTestCase):
fips = ri.get_floating_ips()
self.assertEqual([{'host': HOSTNAME}], fips)
self.assertEqual(
[{'host': HOSTNAME}, {'host': mock.sentinel.otherhost}], fips)
def test_floating_forward_rules_no_fip_ns(self):
router = mock.MagicMock()
router.get.return_value = [{'host': HOSTNAME},
{'host': mock.sentinel.otherhost}]
fip = {'id': _uuid()}
ri = self._create_router(router)
floating_ip = mock.Mock()
fixed_ip = mock.Mock()
self.assertFalse(ri.floating_forward_rules(floating_ip, fixed_ip))
self.assertFalse(ri.floating_forward_rules(fip))
def test_floating_forward_rules(self):
router = mock.MagicMock()
@ -250,6 +252,9 @@ class TestDvrRouterOperations(base.BaseTestCase):
floating_ip = '15.1.2.3'
rtr_2_fip_name = 'fake_router'
fixed_ip = '192.168.0.1'
fip = {'id': _uuid(),
'fixed_ip_address': '192.168.0.1',
'floating_ip_address': '15.1.2.3'}
instance = mock.Mock()
instance.get_rtr_ext_device_name = mock.Mock(
return_value=rtr_2_fip_name)
@ -260,7 +265,7 @@ class TestDvrRouterOperations(base.BaseTestCase):
snat_from_fixedip_to_floatingip = (
'float-snat', '-s %s/32 -j SNAT --to-source %s' % (
fixed_ip, floating_ip))
actual = ri.floating_forward_rules(floating_ip, fixed_ip)
actual = ri.floating_forward_rules(fip)
expected = [dnat_from_floatingip_to_fixedip,
snat_from_fixedip_to_floatingip]
self.assertEqual(expected, actual)
@ -405,9 +410,13 @@ class TestDvrRouterOperations(base.BaseTestCase):
table=16,
priority=FIP_PRI)
def _test_add_floating_ip(self, ri, fip, is_failure):
ri.floating_ip_added_dist = mock.Mock()
def _test_add_floating_ip(self, ri, fip, is_failure=False):
if not is_failure:
ri.floating_ip_added_dist = mock.Mock(
return_value=lib_constants.FLOATINGIP_STATUS_ACTIVE)
else:
ri.floating_ip_added_dist = mock.Mock(
return_value=lib_constants.FLOATINGIP_STATUS_ERROR)
result = ri.add_floating_ip(fip,
mock.sentinel.interface_name,
mock.sentinel.device)
@ -419,10 +428,18 @@ class TestDvrRouterOperations(base.BaseTestCase):
ri = self._create_router(mock.MagicMock())
ip = '15.1.2.3'
fip = {'floating_ip_address': ip}
result = self._test_add_floating_ip(ri, fip, True)
result = self._test_add_floating_ip(ri, fip)
ri.floating_ip_added_dist.assert_called_once_with(fip, ip + '/32')
self.assertEqual(lib_constants.FLOATINGIP_STATUS_ACTIVE, result)
def test_add_floating_ip_failure(self):
ri = self._create_router(mock.MagicMock())
ip = '15.1.2.3'
fip = {'floating_ip_address': ip}
result = self._test_add_floating_ip(ri, fip, True)
ri.floating_ip_added_dist.assert_called_once_with(fip, ip + '/32')
self.assertEqual(lib_constants.FLOATINGIP_STATUS_ERROR, result)
@mock.patch.object(router_info.RouterInfo, 'remove_floating_ip')
def test_remove_floating_ip(self, super_remove_floating_ip):
ri = self._create_router(mock.MagicMock())
@ -694,14 +711,14 @@ class TestDvrRouterOperations(base.BaseTestCase):
def test_external_gateway_removed_ext_gw_port_and_fip(self):
agent = l3_agent.L3NATAgent(HOSTNAME, self.conf)
agent.conf.agent_mode = 'dvr'
agent.conf.agent_mode = lib_constants.L3_AGENT_MODE_DVR_SNAT
router = l3_test_common.prepare_router_data(num_internal_ports=2)
router['gw_port_host'] = HOSTNAME
self.mock_driver.unplug.reset_mock()
external_net_id = router['gw_port']['network_id']
self._set_ri_kwargs(agent, router['id'], router)
ri = dvr_router.DvrLocalRouter(HOSTNAME, **self.ri_kwargs)
ri = dvr_edge_rtr.DvrEdgeRouter(HOSTNAME, **self.ri_kwargs)
ri.remove_floating_ip = mock.Mock()
agent._fetch_external_net_id = mock.Mock(return_value=external_net_id)
ri.ex_gw_port = ri.router['gw_port']

20
releasenotes/notes/dvr_handle_unbound_floatingip_port-f12ae806b8be2065.yaml Normal file
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---
features:
- |
Floating IPs associated with an unbound port with DVR routers will
not be distributed, but will be centralized and implemented in the
SNAT namespace of the Network node or ``dvr_snat`` node.
Floating IPs associated with allowed_address_pair port IP and are
bound to multiple active VMs with DVR routers will be implemented
in the SNAT namespace in the Network node or ``dvr_snat`` node. This
will address VRRP use cases.
More information about this is captured in
`bug 1583694 <https://bugs.launchpad.net/neutron/+bug/1583694>`__.
issues:
- |
While the bound port Floating IPs are distributed, the unbound port
Floating IPs are centralized.
fixes:
- |
Allows the unbound port Floating IPs to be configured
properly with DVR routers irrespective of its device_owner.