L3 Agent support for routers with HA and DVR
The main difference for DVR HA routers is where the VRRP/keepalived logic is run and which ports fall in the HA domain for DVR. Instead of running in the qrouter namespace, keepalived will run inside the snat-namespace. Therefore only snat ports will fall under the control of the HA domain. Partial-Bug: #1365473 Change-Id: If2962580397d39f72fd1fbbc1188a6958f00ff0c Co-Authored-By: Michael Smith <michael.smith6@hp.com> Co-Authored-By: Hardik Italia <hardik.italia@hp.com> Co-Authored-By: Adolfo Duarte <adolfo.duarte@hp.com> Co-Authored-By: John Schwarz <jschwarz@redhat.com>changes/93/196893/50
Michael Smith
9 years ago
committed by
John Schwarz
parent
44cc4b9a63
commit
f63366e615
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# 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 oslo_log import log as logging
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from neutron.agent.l3.dvr_edge_router import DvrEdgeRouter
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from neutron.agent.l3 import dvr_snat_ns
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from neutron.agent.l3.ha_router import HaRouter
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from neutron.agent.l3.router_info import RouterInfo
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from neutron.common import constants as l3_constants
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LOG = logging.getLogger(__name__)
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class DvrEdgeHaRouter(DvrEdgeRouter, 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, agent, host, *args, **kwargs):
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super(DvrEdgeHaRouter, self).__init__(agent, host,
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*args, **kwargs)
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self.enable_snat = None
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self.snat_ports = 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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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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dvr_snat_ns.SNAT_INT_DEV_PREFIX)
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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=l3_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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HaRouter.external_gateway_updated(self, ex_gw_port, interface_name)
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def initialize(self, process_monitor):
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self._create_snat_namespace()
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super(DvrEdgeHaRouter, self).initialize(process_monitor)
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def process(self, agent):
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super(DvrEdgeHaRouter, self).process(agent)
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if self.ha_port:
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self.enable_keepalived()
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def delete(self, agent):
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super(DvrEdgeHaRouter, self).delete(agent)
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if self.snat_namespace:
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self.snat_namespace.delete()
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def get_router_cidrs(self, device):
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return RouterInfo.get_router_cidrs(self, device)
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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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self._plug_external_gateway(ex_gw_port, interface_name, ns_name)
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def _is_this_snat_host(self):
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return (self.agent_conf.agent_mode
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== l3_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=dvr_snat_ns.SNAT_INT_DEV_PREFIX)
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