1136 lines
49 KiB
Python
1136 lines
49 KiB
Python
# Copyright 2012 VMware, Inc. 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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#
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import eventlet
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import netaddr
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from oslo_config import cfg
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import oslo_messaging
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from oslo_utils import excutils
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from oslo_utils import importutils
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from oslo_utils import timeutils
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from neutron.agent.l3 import dvr
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from neutron.agent.l3 import dvr_fip_ns
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from neutron.agent.l3 import dvr_router
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from neutron.agent.l3 import event_observers
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from neutron.agent.l3 import ha
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from neutron.agent.l3 import ha_router
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from neutron.agent.l3 import legacy_router
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from neutron.agent.l3 import router_processing_queue as queue
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from neutron.agent.linux import external_process
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from neutron.agent.linux import ip_lib
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from neutron.agent.linux import ra
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from neutron.agent.metadata import driver as metadata_driver
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from neutron.agent import rpc as agent_rpc
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from neutron.common import constants as l3_constants
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from neutron.common import exceptions as n_exc
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from neutron.common import ipv6_utils
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from neutron.common import rpc as n_rpc
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from neutron.common import topics
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from neutron.common import utils as common_utils
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from neutron import context as n_context
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from neutron.i18n import _LE, _LI, _LW
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from neutron import manager
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import loopingcall
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from neutron.openstack.common import periodic_task
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from neutron.services import advanced_service as adv_svc
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try:
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from neutron_fwaas.services.firewall.agents.l3reference \
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import firewall_l3_agent
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except Exception:
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# TODO(dougw) - REMOVE THIS FROM NEUTRON; during l3_agent refactor only
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from neutron.services.firewall.agents.l3reference import firewall_l3_agent
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LOG = logging.getLogger(__name__)
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NS_PREFIX = 'qrouter-'
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INTERNAL_DEV_PREFIX = 'qr-'
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EXTERNAL_DEV_PREFIX = 'qg-'
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class L3PluginApi(object):
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"""Agent side of the l3 agent RPC API.
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API version history:
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1.0 - Initial version.
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1.1 - Floating IP operational status updates
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1.2 - DVR support: new L3 plugin methods added.
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- get_ports_by_subnet
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- get_agent_gateway_port
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Needed by the agent when operating in DVR/DVR_SNAT mode
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1.3 - Get the list of activated services
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"""
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def __init__(self, topic, host):
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self.host = host
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target = oslo_messaging.Target(topic=topic, version='1.0')
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self.client = n_rpc.get_client(target)
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def get_routers(self, context, router_ids=None):
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"""Make a remote process call to retrieve the sync data for routers."""
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cctxt = self.client.prepare()
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return cctxt.call(context, 'sync_routers', host=self.host,
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router_ids=router_ids)
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def get_external_network_id(self, context):
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"""Make a remote process call to retrieve the external network id.
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@raise oslo_messaging.RemoteError: with TooManyExternalNetworks as
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exc_type if there are more than one
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external network
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"""
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cctxt = self.client.prepare()
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return cctxt.call(context, 'get_external_network_id', host=self.host)
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def update_floatingip_statuses(self, context, router_id, fip_statuses):
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"""Call the plugin update floating IPs's operational status."""
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cctxt = self.client.prepare(version='1.1')
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return cctxt.call(context, 'update_floatingip_statuses',
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router_id=router_id, fip_statuses=fip_statuses)
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def get_ports_by_subnet(self, context, subnet_id):
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"""Retrieve ports by subnet id."""
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cctxt = self.client.prepare(version='1.2')
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return cctxt.call(context, 'get_ports_by_subnet', host=self.host,
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subnet_id=subnet_id)
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def get_agent_gateway_port(self, context, fip_net):
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"""Get or create an agent_gateway_port."""
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cctxt = self.client.prepare(version='1.2')
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return cctxt.call(context, 'get_agent_gateway_port',
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network_id=fip_net, host=self.host)
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def get_service_plugin_list(self, context):
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"""Make a call to get the list of activated services."""
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cctxt = self.client.prepare(version='1.3')
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return cctxt.call(context, 'get_service_plugin_list')
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class L3NATAgent(firewall_l3_agent.FWaaSL3AgentRpcCallback,
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ha.AgentMixin,
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dvr.AgentMixin,
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manager.Manager):
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"""Manager for L3NatAgent
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API version history:
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1.0 initial Version
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1.1 changed the type of the routers parameter
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to the routers_updated method.
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It was previously a list of routers in dict format.
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It is now a list of router IDs only.
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Per rpc versioning rules, it is backwards compatible.
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1.2 - DVR support: new L3 agent methods added.
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- add_arp_entry
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- del_arp_entry
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Needed by the L3 service when dealing with DVR
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"""
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target = oslo_messaging.Target(version='1.2')
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def __init__(self, host, conf=None):
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if conf:
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self.conf = conf
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else:
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self.conf = cfg.CONF
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self.router_info = {}
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self._check_config_params()
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self.process_monitor = external_process.ProcessMonitor(
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config=self.conf,
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resource_type='router')
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try:
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self.driver = importutils.import_object(
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self.conf.interface_driver,
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self.conf
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)
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except Exception:
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LOG.error(_LE("Error importing interface driver "
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"'%s'"), self.conf.interface_driver)
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raise SystemExit(1)
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self.context = n_context.get_admin_context_without_session()
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self.plugin_rpc = L3PluginApi(topics.L3PLUGIN, host)
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self.fullsync = True
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# Get the list of service plugins from Neutron Server
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# This is the first place where we contact neutron-server on startup
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# so retry in case its not ready to respond.
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retry_count = 5
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while True:
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retry_count = retry_count - 1
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try:
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self.neutron_service_plugins = (
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self.plugin_rpc.get_service_plugin_list(self.context))
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except oslo_messaging.RemoteError as e:
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with excutils.save_and_reraise_exception() as ctx:
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ctx.reraise = False
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LOG.warning(_LW('l3-agent cannot check service plugins '
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'enabled at the neutron server when '
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'startup due to RPC error. It happens '
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'when the server does not support this '
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'RPC API. If the error is '
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'UnsupportedVersion you can ignore this '
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'warning. Detail message: %s'), e)
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self.neutron_service_plugins = None
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except oslo_messaging.MessagingTimeout as e:
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with excutils.save_and_reraise_exception() as ctx:
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if retry_count > 0:
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ctx.reraise = False
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LOG.warning(_LW('l3-agent cannot check service '
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'plugins enabled on the neutron '
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'server. Retrying. '
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'Detail message: %s'), e)
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continue
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break
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self._clean_stale_namespaces = self.conf.use_namespaces
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self._queue = queue.RouterProcessingQueue()
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self.event_observers = event_observers.L3EventObservers()
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super(L3NATAgent, self).__init__(conf=self.conf)
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self.target_ex_net_id = None
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self.use_ipv6 = ipv6_utils.is_enabled()
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if self.conf.enable_metadata_proxy:
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driver = metadata_driver.MetadataDriver.instance(self)
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self.event_observers.add(driver)
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def _check_config_params(self):
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"""Check items in configuration files.
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Check for required and invalid configuration items.
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The actual values are not verified for correctness.
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"""
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if not self.conf.interface_driver:
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msg = _LE('An interface driver must be specified')
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LOG.error(msg)
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raise SystemExit(1)
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if not self.conf.use_namespaces and not self.conf.router_id:
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msg = _LE('Router id is required if not using namespaces.')
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LOG.error(msg)
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raise SystemExit(1)
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def _list_namespaces(self):
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"""Get a set of all router namespaces on host
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The argument routers is the list of routers that are recorded in
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the database as being hosted on this node.
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"""
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try:
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root_ip = ip_lib.IPWrapper()
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host_namespaces = root_ip.get_namespaces()
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return set(ns for ns in host_namespaces
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if (ns.startswith(NS_PREFIX)
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or ns.startswith(dvr.SNAT_NS_PREFIX)))
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except RuntimeError:
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LOG.exception(_LE('RuntimeError in obtaining router list '
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'for namespace cleanup.'))
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return set()
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def _get_routers_namespaces(self, router_ids):
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namespaces = set(self.get_ns_name(rid) for rid in router_ids)
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namespaces.update(self.get_snat_ns_name(rid) for rid in router_ids)
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return namespaces
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def _cleanup_namespaces(self, router_namespaces, router_ids):
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"""Destroy stale router namespaces on host when L3 agent restarts
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This routine is called when self._clean_stale_namespaces is True.
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The argument router_namespaces is the list of all routers namespaces
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The argument router_ids is the list of ids for known routers.
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"""
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# Don't destroy namespaces of routers this agent handles.
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ns_to_ignore = self._get_routers_namespaces(router_ids)
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ns_to_destroy = router_namespaces - ns_to_ignore
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for ns in ns_to_destroy:
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try:
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self._destroy_namespace(ns)
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except RuntimeError:
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LOG.exception(_LE('Failed to destroy stale router namespace '
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'%s'), ns)
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self._clean_stale_namespaces = False
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def _destroy_namespace(self, ns):
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if ns.startswith(NS_PREFIX):
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self._destroy_router_namespace(ns)
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elif ns.startswith(dvr_fip_ns.FIP_NS_PREFIX):
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self._destroy_fip_namespace(ns)
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elif ns.startswith(dvr.SNAT_NS_PREFIX):
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self._destroy_snat_namespace(ns)
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def _delete_namespace(self, ns_ip, ns):
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try:
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ns_ip.netns.delete(ns)
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except RuntimeError:
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LOG.exception(_LE('Failed trying to delete namespace: %s'), ns)
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def _destroy_router_namespace(self, ns):
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router_id = self.get_router_id(ns)
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if router_id in self.router_info:
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self.router_info[router_id].radvd.disable()
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ns_ip = ip_lib.IPWrapper(namespace=ns)
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for d in ns_ip.get_devices(exclude_loopback=True):
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if d.name.startswith(INTERNAL_DEV_PREFIX):
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# device is on default bridge
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self.driver.unplug(d.name, namespace=ns,
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prefix=INTERNAL_DEV_PREFIX)
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elif d.name.startswith(dvr_fip_ns.ROUTER_2_FIP_DEV_PREFIX):
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ns_ip.del_veth(d.name)
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elif d.name.startswith(EXTERNAL_DEV_PREFIX):
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self.driver.unplug(d.name,
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bridge=self.conf.external_network_bridge,
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namespace=ns,
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prefix=EXTERNAL_DEV_PREFIX)
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if self.conf.router_delete_namespaces:
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self._delete_namespace(ns_ip, ns)
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def _create_namespace(self, name):
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ip_wrapper_root = ip_lib.IPWrapper()
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ip_wrapper = ip_wrapper_root.ensure_namespace(name)
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ip_wrapper.netns.execute(['sysctl', '-w', 'net.ipv4.ip_forward=1'])
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if self.use_ipv6:
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ip_wrapper.netns.execute(['sysctl', '-w',
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'net.ipv6.conf.all.forwarding=1'])
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def _create_router_namespace(self, ri):
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self._create_namespace(ri.ns_name)
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def _fetch_external_net_id(self, force=False):
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"""Find UUID of single external network for this agent."""
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if self.conf.gateway_external_network_id:
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return self.conf.gateway_external_network_id
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# L3 agent doesn't use external_network_bridge to handle external
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# networks, so bridge_mappings with provider networks will be used
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# and the L3 agent is able to handle any external networks.
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if not self.conf.external_network_bridge:
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return
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if not force and self.target_ex_net_id:
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return self.target_ex_net_id
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try:
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self.target_ex_net_id = self.plugin_rpc.get_external_network_id(
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self.context)
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return self.target_ex_net_id
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except oslo_messaging.RemoteError as e:
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with excutils.save_and_reraise_exception() as ctx:
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if e.exc_type == 'TooManyExternalNetworks':
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ctx.reraise = False
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msg = _(
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"The 'gateway_external_network_id' option must be "
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"configured for this agent as Neutron has more than "
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"one external network.")
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raise Exception(msg)
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def _create_router(self, router_id, router):
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# TODO(Carl) We need to support a router that is both HA and DVR. The
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# patch that enables it will replace these lines. See bug #1365473.
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if router.get('distributed') and router.get('ha'):
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raise n_exc.DvrHaRouterNotSupported(router_id=router_id)
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ns_name = (self.get_ns_name(router_id)
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if self.conf.use_namespaces else None)
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args = []
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kwargs = {
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'router_id': router_id,
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'router': router,
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'use_ipv6': self.use_ipv6,
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'ns_name': ns_name,
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'agent_conf': self.conf,
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'interface_driver': self.driver,
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}
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if router.get('distributed'):
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kwargs['host'] = self.host
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return dvr_router.DvrRouter(*args, **kwargs)
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if router.get('ha'):
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return ha_router.HaRouter(*args, **kwargs)
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return legacy_router.LegacyRouter(*args, **kwargs)
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def _router_added(self, router_id, router):
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ri = self._create_router(router_id, router)
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ri.radvd = ra.DaemonMonitor(router['id'],
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ri.ns_name,
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self.process_monitor,
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self.get_internal_device_name)
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self.event_observers.notify(
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adv_svc.AdvancedService.before_router_added, ri)
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self.router_info[router_id] = ri
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if self.conf.use_namespaces:
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self._create_router_namespace(ri)
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self.process_router_add(ri)
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if ri.is_ha:
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self.process_ha_router_added(ri)
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def _router_removed(self, router_id):
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ri = self.router_info.get(router_id)
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if ri is None:
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LOG.warn(_LW("Info for router %s were not found. "
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"Skipping router removal"), router_id)
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return
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self.event_observers.notify(
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adv_svc.AdvancedService.before_router_removed, ri)
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if ri.is_ha:
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self.process_ha_router_removed(ri)
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ri.router['gw_port'] = None
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ri.router[l3_constants.INTERFACE_KEY] = []
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ri.router[l3_constants.FLOATINGIP_KEY] = []
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self.process_router(ri)
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del self.router_info[router_id]
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self._destroy_router_namespace(ri.ns_name)
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self.event_observers.notify(
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adv_svc.AdvancedService.after_router_removed, ri)
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def _set_subnet_info(self, port):
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ips = port['fixed_ips']
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if not ips:
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raise Exception(_("Router port %s has no IP address") % port['id'])
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if len(ips) > 1:
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LOG.error(_LE("Ignoring multiple IPs on router port %s"),
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port['id'])
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prefixlen = netaddr.IPNetwork(port['subnet']['cidr']).prefixlen
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port['ip_cidr'] = "%s/%s" % (ips[0]['ip_address'], prefixlen)
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def _get_existing_devices(self, ri):
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ip_wrapper = ip_lib.IPWrapper(namespace=ri.ns_name)
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ip_devs = ip_wrapper.get_devices(exclude_loopback=True)
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return [ip_dev.name for ip_dev in ip_devs]
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def _process_internal_ports(self, ri):
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internal_ports = ri.router.get(l3_constants.INTERFACE_KEY, [])
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existing_port_ids = set([p['id'] for p in ri.internal_ports])
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current_port_ids = set([p['id'] for p in internal_ports
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if p['admin_state_up']])
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new_ports = [p for p in internal_ports if
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p['id'] in current_port_ids and
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p['id'] not in existing_port_ids]
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old_ports = [p for p in ri.internal_ports if
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p['id'] not in current_port_ids]
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new_ipv6_port = False
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old_ipv6_port = False
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for p in new_ports:
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self._set_subnet_info(p)
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self.internal_network_added(ri, p)
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ri.internal_ports.append(p)
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self._set_subnet_arp_info(ri, p)
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if (not new_ipv6_port and
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netaddr.IPNetwork(p['subnet']['cidr']).version == 6):
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new_ipv6_port = True
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for p in old_ports:
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self.internal_network_removed(ri, p)
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ri.internal_ports.remove(p)
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if (not old_ipv6_port and
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netaddr.IPNetwork(p['subnet']['cidr']).version == 6):
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old_ipv6_port = True
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# Enable RA
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if new_ipv6_port or old_ipv6_port:
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ri.radvd.enable(internal_ports)
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existing_devices = self._get_existing_devices(ri)
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current_internal_devs = set([n for n in existing_devices
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if n.startswith(INTERNAL_DEV_PREFIX)])
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current_port_devs = set([self.get_internal_device_name(id) for
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id in current_port_ids])
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stale_devs = current_internal_devs - current_port_devs
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for stale_dev in stale_devs:
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LOG.debug('Deleting stale internal router device: %s',
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stale_dev)
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self.driver.unplug(stale_dev,
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namespace=ri.ns_name,
|
|
prefix=INTERNAL_DEV_PREFIX)
|
|
|
|
def _process_external_gateway(self, ri):
|
|
ex_gw_port = ri.get_ex_gw_port()
|
|
ex_gw_port_id = (ex_gw_port and ex_gw_port['id'] or
|
|
ri.ex_gw_port and ri.ex_gw_port['id'])
|
|
|
|
interface_name = None
|
|
if ex_gw_port_id:
|
|
interface_name = self.get_external_device_name(ex_gw_port_id)
|
|
if ex_gw_port:
|
|
def _gateway_ports_equal(port1, port2):
|
|
def _get_filtered_dict(d, ignore):
|
|
return dict((k, v) for k, v in d.iteritems()
|
|
if k not in ignore)
|
|
|
|
keys_to_ignore = set(['binding:host_id'])
|
|
port1_filtered = _get_filtered_dict(port1, keys_to_ignore)
|
|
port2_filtered = _get_filtered_dict(port2, keys_to_ignore)
|
|
return port1_filtered == port2_filtered
|
|
|
|
self._set_subnet_info(ex_gw_port)
|
|
if not ri.ex_gw_port:
|
|
self.external_gateway_added(ri, ex_gw_port, interface_name)
|
|
elif not _gateway_ports_equal(ex_gw_port, ri.ex_gw_port):
|
|
self.external_gateway_updated(ri, ex_gw_port, interface_name)
|
|
elif not ex_gw_port and ri.ex_gw_port:
|
|
self.external_gateway_removed(ri, ri.ex_gw_port, interface_name)
|
|
|
|
existing_devices = self._get_existing_devices(ri)
|
|
stale_devs = [dev for dev in existing_devices
|
|
if dev.startswith(EXTERNAL_DEV_PREFIX)
|
|
and dev != interface_name]
|
|
for stale_dev in stale_devs:
|
|
LOG.debug('Deleting stale external router device: %s',
|
|
stale_dev)
|
|
self.driver.unplug(stale_dev,
|
|
bridge=self.conf.external_network_bridge,
|
|
namespace=ri.ns_name,
|
|
prefix=EXTERNAL_DEV_PREFIX)
|
|
|
|
# Process SNAT rules for external gateway
|
|
if (not ri.router['distributed'] or
|
|
ex_gw_port and self.get_gw_port_host(ri.router) == self.host):
|
|
ri.perform_snat_action(self._handle_router_snat_rules,
|
|
interface_name)
|
|
|
|
def _update_fip_statuses(self, ri, existing_floating_ips, fip_statuses):
|
|
# Identify floating IPs which were disabled
|
|
ri.floating_ips = set(fip_statuses.keys())
|
|
for fip_id in existing_floating_ips - ri.floating_ips:
|
|
fip_statuses[fip_id] = l3_constants.FLOATINGIP_STATUS_DOWN
|
|
# Update floating IP status on the neutron server
|
|
self.plugin_rpc.update_floatingip_statuses(
|
|
self.context, ri.router_id, fip_statuses)
|
|
|
|
def _process_ha_router(self, ri):
|
|
if ri.is_ha:
|
|
if ri.ha_port:
|
|
ri.spawn_keepalived()
|
|
else:
|
|
ri.disable_keepalived()
|
|
|
|
def _process_external(self, ri):
|
|
try:
|
|
with ri.iptables_manager.defer_apply():
|
|
self._process_external_gateway(ri)
|
|
ex_gw_port = ri.get_ex_gw_port()
|
|
# TODO(Carl) Return after setting existing_floating_ips and
|
|
# still call _update_fip_statuses?
|
|
if not ex_gw_port:
|
|
return
|
|
|
|
# Process SNAT/DNAT rules and addresses for floating IPs
|
|
existing_floating_ips = ri.floating_ips
|
|
if ri.router['distributed']:
|
|
self.create_dvr_fip_interfaces(ri, ex_gw_port)
|
|
ri.process_snat_dnat_for_fip()
|
|
|
|
# Once NAT rules for floating IPs are safely in place
|
|
# configure their addresses on the external gateway port
|
|
interface_name = self._get_external_device_interface_name(
|
|
ri, ex_gw_port)
|
|
fip_statuses = ri.configure_fip_addresses(interface_name)
|
|
|
|
except (n_exc.FloatingIpSetupException,
|
|
n_exc.IpTablesApplyException) as e:
|
|
# All floating IPs must be put in error state
|
|
LOG.exception(e)
|
|
fip_statuses = ri.put_fips_in_error_state()
|
|
|
|
self._update_fip_statuses(ri, existing_floating_ips, fip_statuses)
|
|
|
|
@common_utils.exception_logger()
|
|
def process_router(self, ri):
|
|
# TODO(mrsmith) - we shouldn't need to check here
|
|
if 'distributed' not in ri.router:
|
|
ri.router['distributed'] = False
|
|
ex_gw_port = ri.get_ex_gw_port()
|
|
if ri.router.get('distributed') and ex_gw_port:
|
|
ri.fip_ns = self.get_fip_ns(ex_gw_port['network_id'])
|
|
ri.fip_ns.scan_fip_ports(ri)
|
|
self._process_internal_ports(ri)
|
|
self._process_external(ri)
|
|
# Process static routes for router
|
|
ri.routes_updated()
|
|
|
|
# Enable or disable keepalived for ha routers
|
|
self._process_ha_router(ri)
|
|
|
|
# Update ex_gw_port and enable_snat on the router info cache
|
|
ri.ex_gw_port = ex_gw_port
|
|
ri.snat_ports = ri.router.get(l3_constants.SNAT_ROUTER_INTF_KEY, [])
|
|
ri.enable_snat = ri.router.get('enable_snat')
|
|
|
|
def _handle_router_snat_rules(self, ri, ex_gw_port,
|
|
interface_name, action):
|
|
# Remove all the rules
|
|
# This is safe because if use_namespaces is set as False
|
|
# then the agent can only configure one router, otherwise
|
|
# each router's SNAT rules will be in their own namespace
|
|
if not ri.router['distributed']:
|
|
iptables_manager = ri.iptables_manager
|
|
elif ri.snat_iptables_manager:
|
|
iptables_manager = ri.snat_iptables_manager
|
|
else:
|
|
LOG.debug("DVR router: no snat rules to be handled")
|
|
return
|
|
|
|
iptables_manager.ipv4['nat'].empty_chain('POSTROUTING')
|
|
iptables_manager.ipv4['nat'].empty_chain('snat')
|
|
|
|
if not ri.router['distributed']:
|
|
# Add back the jump to float-snat
|
|
iptables_manager.ipv4['nat'].add_rule('snat', '-j $float-snat')
|
|
|
|
# And add them back if the action is add_rules
|
|
if action == 'add_rules' and ex_gw_port:
|
|
# ex_gw_port should not be None in this case
|
|
# NAT rules are added only if ex_gw_port has an IPv4 address
|
|
for ip_addr in ex_gw_port['fixed_ips']:
|
|
ex_gw_ip = ip_addr['ip_address']
|
|
if netaddr.IPAddress(ex_gw_ip).version == 4:
|
|
rules = self.external_gateway_nat_rules(ex_gw_ip,
|
|
interface_name)
|
|
for rule in rules:
|
|
iptables_manager.ipv4['nat'].add_rule(*rule)
|
|
break
|
|
iptables_manager.apply()
|
|
|
|
def create_dvr_fip_interfaces(self, ri, ex_gw_port):
|
|
floating_ips = ri.get_floating_ips()
|
|
fip_agent_port = self.get_floating_agent_gw_interface(
|
|
ri, ex_gw_port['network_id'])
|
|
LOG.debug("FloatingIP agent gateway port received from the plugin: "
|
|
"%s", fip_agent_port)
|
|
if floating_ips:
|
|
is_first = ri.fip_ns.subscribe(ri.router_id)
|
|
if is_first and fip_agent_port:
|
|
if 'subnet' not in fip_agent_port:
|
|
LOG.error(_LE('Missing subnet/agent_gateway_port'))
|
|
else:
|
|
self._set_subnet_info(fip_agent_port)
|
|
ri.fip_ns.create_gateway_port(fip_agent_port)
|
|
|
|
if ri.fip_ns.agent_gateway_port and floating_ips:
|
|
if ri.dist_fip_count == 0:
|
|
ri.fip_ns.create_rtr_2_fip_link(ri)
|
|
|
|
# kicks the FW Agent to add rules for the IR namespace if
|
|
# configured
|
|
self.process_router_add(ri)
|
|
|
|
def _get_external_device_interface_name(self, ri, ex_gw_port):
|
|
if ri.router['distributed']:
|
|
fip_int = ri.fip_ns.get_int_device_name(ri.router_id)
|
|
if ip_lib.device_exists(fip_int, namespace=ri.fip_ns.get_name()):
|
|
return ri.fip_ns.get_rtr_ext_device_name(ri.router_id)
|
|
else:
|
|
return self.get_external_device_name(ex_gw_port['id'])
|
|
|
|
def get_internal_device_name(self, port_id):
|
|
return (INTERNAL_DEV_PREFIX + port_id)[:self.driver.DEV_NAME_LEN]
|
|
|
|
def get_external_device_name(self, port_id):
|
|
return (EXTERNAL_DEV_PREFIX + port_id)[:self.driver.DEV_NAME_LEN]
|
|
|
|
def get_ns_name(self, router_id):
|
|
return (NS_PREFIX + router_id)
|
|
|
|
def get_router_id(self, ns_name):
|
|
return ns_name[len(NS_PREFIX):]
|
|
|
|
def get_floating_agent_gw_interface(self, ri, ext_net_id):
|
|
"""Filter Floating Agent GW port for the external network."""
|
|
fip_ports = ri.router.get(l3_constants.FLOATINGIP_AGENT_INTF_KEY, [])
|
|
return next(
|
|
(p for p in fip_ports if p['network_id'] == ext_net_id), None)
|
|
|
|
def external_gateway_added(self, ri, ex_gw_port, interface_name):
|
|
if ri.router['distributed']:
|
|
ip_wrapr = ip_lib.IPWrapper(namespace=ri.ns_name)
|
|
ip_wrapr.netns.execute(['sysctl', '-w',
|
|
'net.ipv4.conf.all.send_redirects=0'])
|
|
snat_ports = self.get_snat_interfaces(ri)
|
|
for p in ri.internal_ports:
|
|
gateway = self._map_internal_interfaces(ri, p, snat_ports)
|
|
id_name = self.get_internal_device_name(p['id'])
|
|
if gateway:
|
|
self._snat_redirect_add(ri, gateway['fixed_ips'][0]
|
|
['ip_address'], p, id_name)
|
|
|
|
if (self.conf.agent_mode == l3_constants.L3_AGENT_MODE_DVR_SNAT and
|
|
self.get_gw_port_host(ri.router) == self.host):
|
|
self._create_dvr_gateway(ri, ex_gw_port, interface_name,
|
|
snat_ports)
|
|
for port in snat_ports:
|
|
for ip in port['fixed_ips']:
|
|
self._update_arp_entry(ri, ip['ip_address'],
|
|
port['mac_address'],
|
|
ip['subnet_id'], 'add')
|
|
return
|
|
|
|
# Compute a list of addresses this router is supposed to have.
|
|
# This avoids unnecessarily removing those addresses and
|
|
# causing a momentarily network outage.
|
|
floating_ips = ri.get_floating_ips()
|
|
preserve_ips = [common_utils.ip_to_cidr(ip['floating_ip_address'])
|
|
for ip in floating_ips]
|
|
|
|
self._external_gateway_added(ri, ex_gw_port, interface_name,
|
|
ri.ns_name, preserve_ips)
|
|
|
|
if ri.is_ha:
|
|
ri._ha_external_gateway_added(ex_gw_port, interface_name)
|
|
ri._ha_disable_addressing_on_interface(interface_name)
|
|
|
|
def external_gateway_updated(self, ri, ex_gw_port, interface_name):
|
|
preserve_ips = []
|
|
if ri.router['distributed']:
|
|
if (self.conf.agent_mode == l3_constants.L3_AGENT_MODE_DVR_SNAT and
|
|
self.get_gw_port_host(ri.router) == self.host):
|
|
ns_name = self.get_snat_ns_name(ri.router['id'])
|
|
else:
|
|
# no centralized SNAT gateway for this node/agent
|
|
LOG.debug("not hosting snat for router: %s", ri.router['id'])
|
|
return
|
|
else:
|
|
ns_name = ri.ns_name
|
|
floating_ips = ri.get_floating_ips()
|
|
preserve_ips = [common_utils.ip_to_cidr(ip['floating_ip_address'])
|
|
for ip in floating_ips]
|
|
|
|
self._external_gateway_added(ri, ex_gw_port, interface_name,
|
|
ns_name, preserve_ips)
|
|
|
|
if ri.is_ha:
|
|
ri._ha_external_gateway_updated(ex_gw_port, interface_name)
|
|
|
|
def _external_gateway_added(self, ri, ex_gw_port, interface_name,
|
|
ns_name, preserve_ips):
|
|
if not ip_lib.device_exists(interface_name, namespace=ns_name):
|
|
self.driver.plug(ex_gw_port['network_id'],
|
|
ex_gw_port['id'], interface_name,
|
|
ex_gw_port['mac_address'],
|
|
bridge=self.conf.external_network_bridge,
|
|
namespace=ns_name,
|
|
prefix=EXTERNAL_DEV_PREFIX)
|
|
|
|
if not ri.is_ha:
|
|
self.driver.init_l3(
|
|
interface_name, [ex_gw_port['ip_cidr']], namespace=ns_name,
|
|
gateway=ex_gw_port['subnet'].get('gateway_ip'),
|
|
extra_subnets=ex_gw_port.get('extra_subnets', []),
|
|
preserve_ips=preserve_ips)
|
|
ip_address = ex_gw_port['ip_cidr'].split('/')[0]
|
|
ip_lib.send_gratuitous_arp(ns_name,
|
|
interface_name,
|
|
ip_address,
|
|
self.conf.send_arp_for_ha)
|
|
|
|
def external_gateway_removed(self, ri, ex_gw_port, interface_name):
|
|
if ri.router['distributed']:
|
|
# TODO(Carl) Should this be calling process_snat_dnat_for_fip?
|
|
ri.process_floating_ip_nat_rules()
|
|
if ri.fip_ns:
|
|
to_fip_interface_name = (
|
|
self._get_external_device_interface_name(ri, ex_gw_port))
|
|
ri.process_floating_ip_addresses(to_fip_interface_name)
|
|
for p in ri.internal_ports:
|
|
internal_interface = self.get_internal_device_name(p['id'])
|
|
self._snat_redirect_remove(ri, p, internal_interface)
|
|
|
|
if (self.conf.agent_mode == l3_constants.L3_AGENT_MODE_DVR_SNAT
|
|
and self.get_gw_port_host(ri.router) == self.host):
|
|
ns_name = self.get_snat_ns_name(ri.router['id'])
|
|
else:
|
|
# not hosting agent - no work to do
|
|
LOG.debug('DVR: CSNAT not hosted: %s', ex_gw_port)
|
|
return
|
|
else:
|
|
ns_name = ri.ns_name
|
|
|
|
if ri.is_ha:
|
|
ri._ha_external_gateway_removed(interface_name)
|
|
|
|
self.driver.unplug(interface_name,
|
|
bridge=self.conf.external_network_bridge,
|
|
namespace=ns_name,
|
|
prefix=EXTERNAL_DEV_PREFIX)
|
|
if ri.router['distributed']:
|
|
self._destroy_snat_namespace(ns_name)
|
|
|
|
def external_gateway_nat_rules(self, ex_gw_ip, interface_name):
|
|
rules = [('POSTROUTING', '! -i %(interface_name)s '
|
|
'! -o %(interface_name)s -m conntrack ! '
|
|
'--ctstate DNAT -j ACCEPT' %
|
|
{'interface_name': interface_name}),
|
|
('snat', '-o %s -j SNAT --to-source %s' %
|
|
(interface_name, ex_gw_ip))]
|
|
return rules
|
|
|
|
def _internal_network_added(self, ns_name, network_id, port_id,
|
|
internal_cidr, mac_address,
|
|
interface_name, prefix, is_ha=False):
|
|
if not ip_lib.device_exists(interface_name, namespace=ns_name):
|
|
self.driver.plug(network_id, port_id, interface_name, mac_address,
|
|
namespace=ns_name,
|
|
prefix=prefix)
|
|
|
|
if not is_ha:
|
|
self.driver.init_l3(interface_name, [internal_cidr],
|
|
namespace=ns_name)
|
|
ip_address = internal_cidr.split('/')[0]
|
|
ip_lib.send_gratuitous_arp(ns_name,
|
|
interface_name,
|
|
ip_address,
|
|
self.conf.send_arp_for_ha)
|
|
|
|
def internal_network_added(self, ri, port):
|
|
network_id = port['network_id']
|
|
port_id = port['id']
|
|
internal_cidr = port['ip_cidr']
|
|
mac_address = port['mac_address']
|
|
|
|
interface_name = self.get_internal_device_name(port_id)
|
|
|
|
self._internal_network_added(ri.ns_name, network_id, port_id,
|
|
internal_cidr, mac_address,
|
|
interface_name, INTERNAL_DEV_PREFIX,
|
|
ri.is_ha)
|
|
|
|
if ri.is_ha:
|
|
ri._ha_disable_addressing_on_interface(interface_name)
|
|
ri._add_vip(internal_cidr, interface_name)
|
|
|
|
ex_gw_port = ri.get_ex_gw_port()
|
|
if ri.router['distributed'] and ex_gw_port:
|
|
snat_ports = self.get_snat_interfaces(ri)
|
|
sn_port = self._map_internal_interfaces(ri, port, snat_ports)
|
|
if sn_port:
|
|
self._snat_redirect_add(ri, sn_port['fixed_ips'][0]
|
|
['ip_address'], port, interface_name)
|
|
if (self.conf.agent_mode == l3_constants.L3_AGENT_MODE_DVR_SNAT
|
|
and self.get_gw_port_host(ri.router) == self.host):
|
|
ns_name = self.get_snat_ns_name(ri.router['id'])
|
|
self._set_subnet_info(sn_port)
|
|
interface_name = (
|
|
self.get_snat_int_device_name(sn_port['id']))
|
|
self._internal_network_added(ns_name,
|
|
sn_port['network_id'],
|
|
sn_port['id'],
|
|
sn_port['ip_cidr'],
|
|
sn_port['mac_address'],
|
|
interface_name,
|
|
dvr.SNAT_INT_DEV_PREFIX)
|
|
|
|
def internal_network_removed(self, ri, port):
|
|
port_id = port['id']
|
|
interface_name = self.get_internal_device_name(port_id)
|
|
if ri.router['distributed'] and ri.ex_gw_port:
|
|
# DVR handling code for SNAT
|
|
self._snat_redirect_remove(ri, port, interface_name)
|
|
if (self.conf.agent_mode == l3_constants.L3_AGENT_MODE_DVR_SNAT
|
|
and ri.ex_gw_port['binding:host_id'] == self.host):
|
|
snat_port = self._map_internal_interfaces(ri, port,
|
|
ri.snat_ports)
|
|
if snat_port:
|
|
snat_interface = (
|
|
self.get_snat_int_device_name(snat_port['id'])
|
|
)
|
|
ns_name = self.get_snat_ns_name(ri.router['id'])
|
|
prefix = dvr.SNAT_INT_DEV_PREFIX
|
|
if ip_lib.device_exists(snat_interface,
|
|
namespace=ns_name):
|
|
self.driver.unplug(snat_interface, namespace=ns_name,
|
|
prefix=prefix)
|
|
|
|
if ip_lib.device_exists(interface_name, namespace=ri.ns_name):
|
|
if ri.is_ha:
|
|
ri._clear_vips(interface_name)
|
|
self.driver.unplug(interface_name, namespace=ri.ns_name,
|
|
prefix=INTERNAL_DEV_PREFIX)
|
|
|
|
def router_deleted(self, context, router_id):
|
|
"""Deal with router deletion RPC message."""
|
|
LOG.debug('Got router deleted notification for %s', router_id)
|
|
update = queue.RouterUpdate(router_id,
|
|
queue.PRIORITY_RPC,
|
|
action=queue.DELETE_ROUTER)
|
|
self._queue.add(update)
|
|
|
|
def routers_updated(self, context, routers):
|
|
"""Deal with routers modification and creation RPC message."""
|
|
LOG.debug('Got routers updated notification :%s', routers)
|
|
if routers:
|
|
# This is needed for backward compatibility
|
|
if isinstance(routers[0], dict):
|
|
routers = [router['id'] for router in routers]
|
|
for id in routers:
|
|
update = queue.RouterUpdate(id, queue.PRIORITY_RPC)
|
|
self._queue.add(update)
|
|
|
|
def router_removed_from_agent(self, context, payload):
|
|
LOG.debug('Got router removed from agent :%r', payload)
|
|
router_id = payload['router_id']
|
|
update = queue.RouterUpdate(router_id,
|
|
queue.PRIORITY_RPC,
|
|
action=queue.DELETE_ROUTER)
|
|
self._queue.add(update)
|
|
|
|
def router_added_to_agent(self, context, payload):
|
|
LOG.debug('Got router added to agent :%r', payload)
|
|
self.routers_updated(context, payload)
|
|
|
|
def _process_router_if_compatible(self, router):
|
|
if (self.conf.external_network_bridge and
|
|
not ip_lib.device_exists(self.conf.external_network_bridge)):
|
|
LOG.error(_LE("The external network bridge '%s' does not exist"),
|
|
self.conf.external_network_bridge)
|
|
return
|
|
|
|
# If namespaces are disabled, only process the router associated
|
|
# with the configured agent id.
|
|
if (not self.conf.use_namespaces and
|
|
router['id'] != self.conf.router_id):
|
|
raise n_exc.RouterNotCompatibleWithAgent(router_id=router['id'])
|
|
|
|
# Either ex_net_id or handle_internal_only_routers must be set
|
|
ex_net_id = (router['external_gateway_info'] or {}).get('network_id')
|
|
if not ex_net_id and not self.conf.handle_internal_only_routers:
|
|
raise n_exc.RouterNotCompatibleWithAgent(router_id=router['id'])
|
|
|
|
# If target_ex_net_id and ex_net_id are set they must be equal
|
|
target_ex_net_id = self._fetch_external_net_id()
|
|
if (target_ex_net_id and ex_net_id and ex_net_id != target_ex_net_id):
|
|
# Double check that our single external_net_id has not changed
|
|
# by forcing a check by RPC.
|
|
if ex_net_id != self._fetch_external_net_id(force=True):
|
|
raise n_exc.RouterNotCompatibleWithAgent(
|
|
router_id=router['id'])
|
|
|
|
if router['id'] not in self.router_info:
|
|
self._process_added_router(router)
|
|
else:
|
|
self._process_updated_router(router)
|
|
|
|
def _process_added_router(self, router):
|
|
# TODO(pcm): Next refactoring will rework this logic
|
|
self._router_added(router['id'], router)
|
|
ri = self.router_info[router['id']]
|
|
ri.router = router
|
|
self.process_router(ri)
|
|
self.event_observers.notify(
|
|
adv_svc.AdvancedService.after_router_added, ri)
|
|
|
|
def _process_updated_router(self, router):
|
|
# TODO(pcm): Next refactoring will rework this logic
|
|
ri = self.router_info[router['id']]
|
|
ri.router = router
|
|
self.event_observers.notify(
|
|
adv_svc.AdvancedService.before_router_updated, ri)
|
|
self.process_router(ri)
|
|
self.event_observers.notify(
|
|
adv_svc.AdvancedService.after_router_updated, ri)
|
|
|
|
def _process_router_update(self):
|
|
for rp, update in self._queue.each_update_to_next_router():
|
|
LOG.debug("Starting router update for %s", update.id)
|
|
router = update.router
|
|
if update.action != queue.DELETE_ROUTER and not router:
|
|
try:
|
|
update.timestamp = timeutils.utcnow()
|
|
routers = self.plugin_rpc.get_routers(self.context,
|
|
[update.id])
|
|
except Exception:
|
|
msg = _LE("Failed to fetch router information for '%s'")
|
|
LOG.exception(msg, update.id)
|
|
self.fullsync = True
|
|
continue
|
|
|
|
if routers:
|
|
router = routers[0]
|
|
|
|
if not router:
|
|
self._router_removed(update.id)
|
|
continue
|
|
|
|
try:
|
|
self._process_router_if_compatible(router)
|
|
except n_exc.RouterNotCompatibleWithAgent as e:
|
|
LOG.exception(e.msg)
|
|
# Was the router previously handled by this agent?
|
|
if router['id'] in self.router_info:
|
|
LOG.error(_LE("Removing incompatible router '%s'"),
|
|
router['id'])
|
|
self._router_removed(router['id'])
|
|
except Exception:
|
|
msg = _LE("Failed to process compatible router '%s'")
|
|
LOG.exception(msg, update.id)
|
|
self.fullsync = True
|
|
continue
|
|
|
|
LOG.debug("Finished a router update for %s", update.id)
|
|
rp.fetched_and_processed(update.timestamp)
|
|
|
|
def _process_routers_loop(self):
|
|
LOG.debug("Starting _process_routers_loop")
|
|
pool = eventlet.GreenPool(size=8)
|
|
while True:
|
|
pool.spawn_n(self._process_router_update)
|
|
|
|
@periodic_task.periodic_task
|
|
def periodic_sync_routers_task(self, context):
|
|
self.process_services_sync(context)
|
|
LOG.debug("Starting periodic_sync_routers_task - fullsync:%s",
|
|
self.fullsync)
|
|
if not self.fullsync:
|
|
return
|
|
|
|
# self.fullsync is True at this point. If an exception -- caught or
|
|
# uncaught -- prevents setting it to False below then the next call
|
|
# to periodic_sync_routers_task will re-enter this code and try again.
|
|
|
|
# Capture a picture of namespaces *before* fetching the full list from
|
|
# the database. This is important to correctly identify stale ones.
|
|
namespaces = set()
|
|
if self._clean_stale_namespaces:
|
|
namespaces = self._list_namespaces()
|
|
prev_router_ids = set(self.router_info)
|
|
timestamp = timeutils.utcnow()
|
|
|
|
try:
|
|
if self.conf.use_namespaces:
|
|
routers = self.plugin_rpc.get_routers(context)
|
|
else:
|
|
routers = self.plugin_rpc.get_routers(context,
|
|
[self.conf.router_id])
|
|
|
|
except oslo_messaging.MessagingException:
|
|
LOG.exception(_LE("Failed synchronizing routers due to RPC error"))
|
|
else:
|
|
LOG.debug('Processing :%r', routers)
|
|
for r in routers:
|
|
update = queue.RouterUpdate(r['id'],
|
|
queue.PRIORITY_SYNC_ROUTERS_TASK,
|
|
router=r,
|
|
timestamp=timestamp)
|
|
self._queue.add(update)
|
|
self.fullsync = False
|
|
LOG.debug("periodic_sync_routers_task successfully completed")
|
|
|
|
# Resync is not necessary for the cleanup of stale namespaces
|
|
curr_router_ids = set([r['id'] for r in routers])
|
|
|
|
# Two kinds of stale routers: Routers for which info is cached in
|
|
# self.router_info and the others. First, handle the former.
|
|
for router_id in prev_router_ids - curr_router_ids:
|
|
update = queue.RouterUpdate(router_id,
|
|
queue.PRIORITY_SYNC_ROUTERS_TASK,
|
|
timestamp=timestamp,
|
|
action=queue.DELETE_ROUTER)
|
|
self._queue.add(update)
|
|
|
|
# Next, one effort to clean out namespaces for which we don't have
|
|
# a record. (i.e. _clean_stale_namespaces=False after one pass)
|
|
if self._clean_stale_namespaces:
|
|
ids_to_keep = curr_router_ids | prev_router_ids
|
|
self._cleanup_namespaces(namespaces, ids_to_keep)
|
|
|
|
def after_start(self):
|
|
eventlet.spawn_n(self._process_routers_loop)
|
|
LOG.info(_LI("L3 agent started"))
|
|
# When L3 agent is ready, we immediately do a full sync
|
|
self.periodic_sync_routers_task(self.context)
|
|
|
|
|
|
class L3NATAgentWithStateReport(L3NATAgent):
|
|
|
|
def __init__(self, host, conf=None):
|
|
super(L3NATAgentWithStateReport, self).__init__(host=host, conf=conf)
|
|
self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN)
|
|
self.agent_state = {
|
|
'binary': 'neutron-l3-agent',
|
|
'host': host,
|
|
'topic': topics.L3_AGENT,
|
|
'configurations': {
|
|
'agent_mode': self.conf.agent_mode,
|
|
'use_namespaces': self.conf.use_namespaces,
|
|
'router_id': self.conf.router_id,
|
|
'handle_internal_only_routers':
|
|
self.conf.handle_internal_only_routers,
|
|
'external_network_bridge': self.conf.external_network_bridge,
|
|
'gateway_external_network_id':
|
|
self.conf.gateway_external_network_id,
|
|
'interface_driver': self.conf.interface_driver},
|
|
'start_flag': True,
|
|
'agent_type': l3_constants.AGENT_TYPE_L3}
|
|
report_interval = self.conf.AGENT.report_interval
|
|
self.use_call = True
|
|
if report_interval:
|
|
self.heartbeat = loopingcall.FixedIntervalLoopingCall(
|
|
self._report_state)
|
|
self.heartbeat.start(interval=report_interval)
|
|
|
|
def _report_state(self):
|
|
LOG.debug("Report state task started")
|
|
num_ex_gw_ports = 0
|
|
num_interfaces = 0
|
|
num_floating_ips = 0
|
|
router_infos = self.router_info.values()
|
|
num_routers = len(router_infos)
|
|
for ri in router_infos:
|
|
ex_gw_port = ri.get_ex_gw_port()
|
|
if ex_gw_port:
|
|
num_ex_gw_ports += 1
|
|
num_interfaces += len(ri.router.get(l3_constants.INTERFACE_KEY,
|
|
[]))
|
|
num_floating_ips += len(ri.router.get(l3_constants.FLOATINGIP_KEY,
|
|
[]))
|
|
configurations = self.agent_state['configurations']
|
|
configurations['routers'] = num_routers
|
|
configurations['ex_gw_ports'] = num_ex_gw_ports
|
|
configurations['interfaces'] = num_interfaces
|
|
configurations['floating_ips'] = num_floating_ips
|
|
try:
|
|
self.state_rpc.report_state(self.context, self.agent_state,
|
|
self.use_call)
|
|
self.agent_state.pop('start_flag', None)
|
|
self.use_call = False
|
|
LOG.debug("Report state task successfully completed")
|
|
except AttributeError:
|
|
# This means the server does not support report_state
|
|
LOG.warn(_LW("Neutron server does not support state report."
|
|
" State report for this agent will be disabled."))
|
|
self.heartbeat.stop()
|
|
return
|
|
except Exception:
|
|
LOG.exception(_LE("Failed reporting state!"))
|
|
|
|
def agent_updated(self, context, payload):
|
|
"""Handle the agent_updated notification event."""
|
|
self.fullsync = True
|
|
LOG.info(_LI("agent_updated by server side %s!"), payload)
|