140 lines
5.5 KiB
Python
140 lines
5.5 KiB
Python
# Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# 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
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from neutron_lib import constants
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from neutron.agent.l3 import dvr_edge_router
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from neutron.agent.l3 import ha_router
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from neutron.agent.l3 import router_info
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class DvrEdgeHaRouter(dvr_edge_router.DvrEdgeRouter,
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ha_router.HaRouter):
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"""Router class which represents a centralized SNAT
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DVR router with HA capabilities.
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"""
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def __init__(self, host, *args, **kwargs):
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super(DvrEdgeHaRouter, self).__init__(host,
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*args, **kwargs)
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self.enable_snat = None
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@property
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def ha_namespace(self):
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if self.snat_namespace:
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return self.snat_namespace.name
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return None
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def internal_network_added(self, port):
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# Call RouterInfo's internal_network_added (Plugs the port, adds IP)
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router_info.RouterInfo.internal_network_added(self, port)
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for subnet in port['subnets']:
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self._set_subnet_arp_info(subnet['id'])
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self._snat_redirect_add_from_port(port)
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if not self.get_ex_gw_port() or not self._is_this_snat_host():
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return
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sn_port = self.get_snat_port_for_internal_port(port)
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if not sn_port:
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return
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self._plug_ha_router_port(
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sn_port,
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self._get_snat_int_device_name,
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constants.SNAT_INT_DEV_PREFIX)
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def add_centralized_floatingip(self, fip, fip_cidr):
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interface_name = self.get_snat_external_device_interface_name(
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self.get_ex_gw_port())
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self._add_vip(fip_cidr, interface_name)
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self.set_ha_port()
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if (self.is_router_master() and self.ha_port and
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self.ha_port['status'] == constants.PORT_STATUS_ACTIVE):
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return super(DvrEdgeHaRouter, self).add_centralized_floatingip(
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fip, fip_cidr)
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else:
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return constants.FLOATINGIP_STATUS_ACTIVE
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def remove_centralized_floatingip(self, fip_cidr):
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self._remove_vip(fip_cidr)
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if self.is_router_master():
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super(DvrEdgeHaRouter, self).remove_centralized_floatingip(
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fip_cidr)
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def get_centralized_fip_cidr_set(self):
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ex_gw_port = self.get_ex_gw_port()
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if not ex_gw_port:
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return set()
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interface_name = self.get_snat_external_device_interface_name(
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ex_gw_port)
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return set(self._get_cidrs_from_keepalived(interface_name))
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def external_gateway_added(self, ex_gw_port, interface_name):
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super(DvrEdgeHaRouter, self).external_gateway_added(
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ex_gw_port, interface_name)
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for port in self.get_snat_interfaces():
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snat_interface_name = self._get_snat_int_device_name(port['id'])
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self._disable_ipv6_addressing_on_interface(snat_interface_name)
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self._add_vips(
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self.get_snat_port_for_internal_port(port),
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snat_interface_name)
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self._add_gateway_vip(ex_gw_port, interface_name)
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self._disable_ipv6_addressing_on_interface(interface_name)
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def external_gateway_removed(self, ex_gw_port, interface_name):
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for port in self.snat_ports:
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snat_interface = self._get_snat_int_device_name(port['id'])
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self.driver.unplug(snat_interface,
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namespace=self.ha_namespace,
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prefix=constants.SNAT_INT_DEV_PREFIX)
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self._clear_vips(snat_interface)
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super(DvrEdgeHaRouter, self)._external_gateway_removed(
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ex_gw_port, interface_name)
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self._clear_vips(interface_name)
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def external_gateway_updated(self, ex_gw_port, interface_name):
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ha_router.HaRouter.external_gateway_updated(self, ex_gw_port,
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interface_name)
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def _external_gateway_added(self, ex_gw_port, interface_name,
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ns_name, preserve_ips):
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link_up = self.external_gateway_link_up()
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self._plug_external_gateway(ex_gw_port, interface_name, ns_name,
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link_up=link_up)
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def _is_this_snat_host(self):
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return (self.agent_conf.agent_mode
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== constants.L3_AGENT_MODE_DVR_SNAT)
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def _dvr_internal_network_removed(self, port):
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super(DvrEdgeHaRouter, self)._dvr_internal_network_removed(port)
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sn_port = self.get_snat_port_for_internal_port(port, self.snat_ports)
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if not sn_port:
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return
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self._clear_vips(self._get_snat_int_device_name(sn_port['id']))
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def _plug_snat_port(self, port):
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"""Used by _create_dvr_gateway in DvrEdgeRouter."""
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interface_name = self._get_snat_int_device_name(port['id'])
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self.driver.plug(port['network_id'], port['id'],
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interface_name, port['mac_address'],
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namespace=self.snat_namespace.name,
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prefix=constants.SNAT_INT_DEV_PREFIX,
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mtu=port.get('mtu'))
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