Fix IP allocation for multiple slaac subnets
Currently when one network contains multiple IPv6 slaac
subnets, the IP allocation for the port on this network
is not correct. Only the first fixed ip is based on EUI64.
This is caused by a wrong usage of removing element in list.
Change-Id: I1b0a478997371afeae34c0536d5fed7a18223f63
Closes-Bug:1358709
(cherry picked from commit 1dac7c4347)
This commit is contained in:
Xu Han Peng
Ihar Hrachyshka
parent
e27f00d949
commit
755f2ad747
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@ -552,32 +552,30 @@ class NeutronDbPluginV2(neutron_plugin_base_v2.NeutronPluginBaseV2,
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subnets = self.get_subnets(context, filters=filter)
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# Split into v4 and v6 subnets
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v4 = []
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v6 = []
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v6_stateful = []
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v6_stateless = []
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for subnet in subnets:
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if subnet['ip_version'] == 4:
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v4.append(subnet)
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else:
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v6.append(subnet)
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for subnet in v6:
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if ipv6_utils.is_auto_address_subnet(subnet):
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#(dzyu) If true, calculate an IPv6 address
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# by mac address and prefix, then remove this
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# subnet from the array of subnets that will be passed
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# to the _generate_ip() function call, since we just
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# generated an IP.
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prefix = subnet['cidr']
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ip_address = ipv6_utils.get_ipv6_addr_by_EUI64(
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prefix, p['mac_address'])
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if not self._check_unique_ip(
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context, p['network_id'],
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subnet['id'], ip_address.format()):
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raise n_exc.IpAddressInUse(
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net_id=p['network_id'],
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ip_address=ip_address.format())
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ips.append({'ip_address': ip_address.format(),
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'subnet_id': subnet['id']})
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v6.remove(subnet)
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version_subnets = [v4, v6]
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if ipv6_utils.is_auto_address_subnet(subnet):
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v6_stateless.append(subnet)
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else:
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v6_stateful.append(subnet)
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for subnet in v6_stateless:
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prefix = subnet['cidr']
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ip_address = ipv6_utils.get_ipv6_addr_by_EUI64(
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prefix, p['mac_address'])
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if not self._check_unique_ip(
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context, p['network_id'],
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subnet['id'], ip_address.format()):
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raise n_exc.IpAddressInUse(
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net_id=p['network_id'],
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ip_address=ip_address.format())
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ips.append({'ip_address': ip_address.format(),
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'subnet_id': subnet['id']})
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version_subnets = [v4, v6_stateful]
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for subnets in version_subnets:
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if subnets:
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result = NeutronDbPluginV2._generate_ip(context, subnets)
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@ -1492,6 +1492,34 @@ fixed_ips=ip_address%%3D%s&fixed_ips=ip_address%%3D%s&fixed_ips=subnet_id%%3D%s
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port_mac))
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self.assertEqual(port['port']['fixed_ips'][0]['ip_address'], eui_addr)
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def test_ip_allocation_for_ipv6_2_subnet_slaac_mode(self):
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res = self._create_network(fmt=self.fmt, name='net',
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admin_state_up=True)
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network = self.deserialize(self.fmt, res)
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v6_subnet_1 = self._make_subnet(self.fmt, network,
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gateway='2001:100::1',
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cidr='2001:100::0/64',
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ip_version=6,
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ipv6_ra_mode=constants.IPV6_SLAAC)
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v6_subnet_2 = self._make_subnet(self.fmt, network,
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gateway='2001:200::1',
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cidr='2001:200::0/64',
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ip_version=6,
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ipv6_ra_mode=constants.IPV6_SLAAC)
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port = self._make_port(self.fmt, network['network']['id'])
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self.assertEqual(len(port['port']['fixed_ips']), 2)
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port_mac = port['port']['mac_address']
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cidr_1 = v6_subnet_1['subnet']['cidr']
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cidr_2 = v6_subnet_2['subnet']['cidr']
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eui_addr_1 = str(ipv6_utils.get_ipv6_addr_by_EUI64(cidr_1,
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port_mac))
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eui_addr_2 = str(ipv6_utils.get_ipv6_addr_by_EUI64(cidr_2,
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port_mac))
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self.assertEqual(port['port']['fixed_ips'][0]['ip_address'],
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eui_addr_1)
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self.assertEqual(port['port']['fixed_ips'][1]['ip_address'],
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eui_addr_2)
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def test_range_allocation(self):
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with self.subnet(gateway_ip='10.0.0.3',
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cidr='10.0.0.0/29') as subnet:
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@ -4143,6 +4171,48 @@ class TestNeutronDbPluginV2(base.BaseTestCase):
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self._validate_rebuild_availability_ranges(pools, allocations,
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expected)
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def _test__allocate_ips_for_port(self, subnets, port, expected):
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plugin = db_base_plugin_v2.NeutronDbPluginV2()
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with mock.patch.object(db_base_plugin_v2.NeutronDbPluginV2,
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'get_subnets') as get_subnets:
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with mock.patch.object(db_base_plugin_v2.NeutronDbPluginV2,
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'_check_unique_ip') as check_unique:
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context = mock.Mock()
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get_subnets.return_value = subnets
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check_unique.return_value = True
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actual = plugin._allocate_ips_for_port(context, port)
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self.assertEqual(expected, actual)
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def test__allocate_ips_for_port_2_slaac_subnets(self):
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subnets = [
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{
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'cidr': u'2001:100::/64',
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'enable_dhcp': True,
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'gateway_ip': u'2001:100::1',
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'id': u'd1a28edd-bd83-480a-bd40-93d036c89f13',
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'ip_version': 6,
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'ipv6_address_mode': None,
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'ipv6_ra_mode': u'slaac'},
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{
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'cidr': u'2001:200::/64',
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'enable_dhcp': True,
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'gateway_ip': u'2001:200::1',
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'id': u'dc813d3d-ed66-4184-8570-7325c8195e28',
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'ip_version': 6,
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'ipv6_address_mode': None,
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'ipv6_ra_mode': u'slaac'}]
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port = {'port': {
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'network_id': 'fbb9b578-95eb-4b79-a116-78e5c4927176',
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'fixed_ips': attributes.ATTR_NOT_SPECIFIED,
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'mac_address': '12:34:56:78:44:ab'}}
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expected = []
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for subnet in subnets:
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addr = str(ipv6_utils.get_ipv6_addr_by_EUI64(
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subnet['cidr'], port['port']['mac_address']))
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expected.append({'ip_address': addr, 'subnet_id': subnet['id']})
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self._test__allocate_ips_for_port(subnets, port, expected)
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class NeutronDbPluginV2AsMixinTestCase(testlib_api.SqlTestCase):
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"""Tests for NeutronDbPluginV2 as Mixin.
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