Support gateway which is not in subnet CIDR in ha_router

There is case that gateway is not in subnet CIDR.
We can set 2 routes as follows to support this:
ip route add 172.16.0.1/32 dev eth0
ip route add default via 172.16.0.1 dev eth0

Conflicts:
    neutron/agent/l3/ha_router.py

Closes-bug: #1861674
Change-Id: I69356e926b15de7f1f99540e7cb98671c634e8a9
(cherry picked from commit 554b5c2267)
This commit is contained in:
jufeng 2020-02-03 14:54:12 +08:00 committed by Slawek Kaplonski
parent 5936e4cea9
commit 8d39f02d46
2 changed files with 13 additions and 0 deletions

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@ -30,6 +30,7 @@ from neutron.agent.linux import ip_lib
from neutron.agent.linux import keepalived
from neutron.common import constants as const
from neutron.common import utils as common_utils
from neutron.ipam import utils as ipam_utils
LOG = logging.getLogger(__name__)
HA_DEV_PREFIX = 'ha-'
@ -270,6 +271,14 @@ class HaRouter(router.RouterInfo):
default_gw_rts = []
instance = self._get_keepalived_instance()
for subnet in ex_gw_port.get('subnets', []):
is_gateway_not_in_subnet = (subnet['gateway_ip'] and
not ipam_utils.check_subnet_ip(
subnet['cidr'],
subnet['gateway_ip']))
if is_gateway_not_in_subnet:
default_gw_rts.append(keepalived.KeepalivedVirtualRoute(
subnet['gateway_ip'], None, interface_name, scope='link'))
for gw_ip in gateway_ips:
# TODO(Carl) This is repeated everywhere. A method would
# be nice.

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@ -77,6 +77,10 @@ class TestBasicRouterOperations(base.BaseTestCase):
ri._add_default_gw_virtual_route(ex_gw_port, 'qg-abc')
self.assertEqual(0, len(mock_instance.virtual_routes.gateway_routes))
subnets[1]['gateway_ip'] = '30.0.1.1'
ri._add_default_gw_virtual_route(ex_gw_port, 'qg-abc')
self.assertEqual(2, len(mock_instance.virtual_routes.gateway_routes))
@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())