57e1fa3264
Fixes bug 1194026 Fixes bug 1200749 Introduce a looping call for performing synchronization with neutron server. The sync will be performed only if router changes are notified via rpc. Only affected routers will be synchronized. Changes will be implemented by the l3 agent spawning a distinct greenthread for each router - iptables will be executed only once using iptables_manager.defer_apply_on. This patch will prevent the occurence of the following issues: - Out-of-order rpc message processing - Long processing time for router changes due to serial execution - Occasional and expected RPC blocks for long periods - Unnecessary processing of multiple requests Change-Id: I0978d1c38ac5c38c4548e5b1877857bb5cac3b81
117 lines
4.8 KiB
Python
117 lines
4.8 KiB
Python
# Copyright (c) 2013 OpenStack Foundation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from neutron.common import constants
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from neutron.common import topics
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from neutron.common import utils
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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.rpc import proxy
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LOG = logging.getLogger(__name__)
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class L3AgentNotifyAPI(proxy.RpcProxy):
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"""API for plugin to notify L3 agent."""
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BASE_RPC_API_VERSION = '1.0'
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def __init__(self, topic=topics.L3_AGENT):
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super(L3AgentNotifyAPI, self).__init__(
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topic=topic, default_version=self.BASE_RPC_API_VERSION)
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def _notification_host(self, context, method, payload, host):
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"""Notify the agent that is hosting the router."""
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LOG.debug(_('Nofity agent at %(host)s the message '
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'%(method)s'), {'host': host,
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'method': method})
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self.cast(
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context, self.make_msg(method,
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payload=payload),
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topic='%s.%s' % (topics.L3_AGENT, host))
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def _agent_notification(self, context, method, router_ids,
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operation, data):
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"""Notify changed routers to hosting l3 agents."""
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adminContext = context.is_admin and context or context.elevated()
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plugin = manager.NeutronManager.get_plugin()
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for router_id in router_ids:
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l3_agents = plugin.get_l3_agents_hosting_routers(
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adminContext, [router_id],
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admin_state_up=True,
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active=True)
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for l3_agent in l3_agents:
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LOG.debug(_('Notify agent at %(topic)s.%(host)s the message '
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'%(method)s'),
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{'topic': l3_agent.topic,
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'host': l3_agent.host,
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'method': method})
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self.cast(
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context, self.make_msg(method,
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routers=[router_id]),
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topic='%s.%s' % (l3_agent.topic, l3_agent.host),
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version='1.1')
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def _notification(self, context, method, router_ids, operation, data):
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"""Notify all the agents that are hosting the routers."""
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plugin = manager.NeutronManager.get_plugin()
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if utils.is_extension_supported(
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plugin, constants.L3_AGENT_SCHEDULER_EXT_ALIAS):
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adminContext = (context.is_admin and
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context or context.elevated())
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plugin.schedule_routers(adminContext, router_ids)
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self._agent_notification(
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context, method, router_ids, operation, data)
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else:
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self.fanout_cast(
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context, self.make_msg(method,
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routers=router_ids),
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topic=topics.L3_AGENT)
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def _notification_fanout(self, context, method, router_id):
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"""Fanout the deleted router to all L3 agents."""
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LOG.debug(_('Fanout notify agent at %(topic)s the message '
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'%(method)s on router %(router_id)s'),
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{'topic': topics.L3_AGENT,
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'method': method,
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'router_id': router_id})
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self.fanout_cast(
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context, self.make_msg(method,
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router_id=router_id),
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topic=topics.L3_AGENT)
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def agent_updated(self, context, admin_state_up, host):
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self._notification_host(context, 'agent_updated',
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{'admin_state_up': admin_state_up},
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host)
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def router_deleted(self, context, router_id):
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self._notification_fanout(context, 'router_deleted', router_id)
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def routers_updated(self, context, router_ids, operation=None, data=None):
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if router_ids:
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self._notification(context, 'routers_updated', router_ids,
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operation, data)
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def router_removed_from_agent(self, context, router_id, host):
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self._notification_host(context, 'router_removed_from_agent',
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{'router_id': router_id}, host)
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def router_added_to_agent(self, context, router_ids, host):
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self._notification_host(context, 'router_added_to_agent',
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router_ids, host)
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L3AgentNotify = L3AgentNotifyAPI()
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