b90167ca6c
In sync_routers L3-RPC method l3-agent sends router_ids but the server side expected router_id. This commit fixes the server side to accept router_ids, and drops "fullsync" arg from the agent side (fullsync is not used anywhere and it does not affect RPC signature). This change allows l3-agent to sync only the specified routers instead of all routers. Fixes bug #1201553 As a result of the above change, auto_schedule_routers() and list_active_sync_routers_on_active_l3_agent() in L3 scheduler needs to handle a list of router IDs. This commit changes L3 scheduler to accept a list of router IDs in the above two methods. Also fixes the argument order of fullsync and router_ids in get_routers in L3PluginApi. L3-agent main code expects router_ids as the second arg. Change-Id: I22e8d11b9676cbcfe9e72449031bb63071be8314
156 lines
6.7 KiB
Python
156 lines
6.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright (c) 2013 OpenStack Foundation.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import random
|
|
|
|
from sqlalchemy.orm import exc
|
|
from sqlalchemy.sql import exists
|
|
|
|
from neutron.common import constants
|
|
from neutron.db import agents_db
|
|
from neutron.db import agentschedulers_db
|
|
from neutron.db import l3_db
|
|
from neutron.openstack.common import log as logging
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class ChanceScheduler(object):
|
|
"""Allocate a L3 agent for a router in a random way.
|
|
More sophisticated scheduler (similar to filter scheduler in nova?)
|
|
can be introduced later.
|
|
"""
|
|
|
|
def auto_schedule_routers(self, plugin, context, host, router_ids):
|
|
"""Schedule non-hosted routers to L3 Agent running on host.
|
|
If router_ids is given, each router in router_ids is scheduled
|
|
if it is not scheduled yet. Otherwise all unscheduled routers
|
|
are scheduled.
|
|
Don't schedule the routers which are hosted already
|
|
by active l3 agents.
|
|
"""
|
|
with context.session.begin(subtransactions=True):
|
|
# query if we have valid l3 agent on the host
|
|
query = context.session.query(agents_db.Agent)
|
|
query = query.filter(agents_db.Agent.agent_type ==
|
|
constants.AGENT_TYPE_L3,
|
|
agents_db.Agent.host == host,
|
|
agents_db.Agent.admin_state_up == True)
|
|
try:
|
|
l3_agent = query.one()
|
|
except (exc.MultipleResultsFound, exc.NoResultFound):
|
|
LOG.debug(_('No enabled L3 agent on host %s'),
|
|
host)
|
|
return False
|
|
if agents_db.AgentDbMixin.is_agent_down(
|
|
l3_agent.heartbeat_timestamp):
|
|
LOG.warn(_('L3 agent %s is not active'), l3_agent.id)
|
|
# check if each of the specified routers is hosted
|
|
if router_ids:
|
|
unscheduled_router_ids = []
|
|
for router_id in router_ids:
|
|
l3_agents = plugin.get_l3_agents_hosting_routers(
|
|
context, [router_id], admin_state_up=True)
|
|
if l3_agents:
|
|
LOG.debug(_('Router %(router_id)s has already been'
|
|
' hosted by L3 agent %(agent_id)s'),
|
|
{'router_id': router_id,
|
|
'agent_id': l3_agents[0]['id']})
|
|
else:
|
|
unscheduled_router_ids.append(router_id)
|
|
if not unscheduled_router_ids:
|
|
# all (specified) routers are already scheduled
|
|
return False
|
|
else:
|
|
# get all routers that are not hosted
|
|
#TODO(gongysh) consider the disabled agent's router
|
|
stmt = ~exists().where(
|
|
l3_db.Router.id ==
|
|
agentschedulers_db.RouterL3AgentBinding.router_id)
|
|
unscheduled_router_ids = [router_id_[0] for router_id_ in
|
|
context.session.query(
|
|
l3_db.Router.id).filter(stmt)]
|
|
if not unscheduled_router_ids:
|
|
LOG.debug(_('No non-hosted routers'))
|
|
return False
|
|
|
|
# check if the configuration of l3 agent is compatible
|
|
# with the router
|
|
routers = plugin.get_routers(
|
|
context, filters={'id': unscheduled_router_ids})
|
|
to_removed_ids = []
|
|
for router in routers:
|
|
candidates = plugin.get_l3_agent_candidates(router, [l3_agent])
|
|
if not candidates:
|
|
to_removed_ids.append(router['id'])
|
|
router_ids = set(unscheduled_router_ids) - set(to_removed_ids)
|
|
if not router_ids:
|
|
LOG.warn(_('No routers compatible with L3 agent configuration'
|
|
' on host %s'), host)
|
|
return False
|
|
|
|
# binding
|
|
for router_id in router_ids:
|
|
binding = agentschedulers_db.RouterL3AgentBinding()
|
|
binding.l3_agent = l3_agent
|
|
binding.router_id = router_id
|
|
binding.default = True
|
|
context.session.add(binding)
|
|
return True
|
|
|
|
def schedule(self, plugin, context, router_id):
|
|
"""Schedule the router to an active L3 agent if there
|
|
is no enable L3 agent hosting it.
|
|
"""
|
|
with context.session.begin(subtransactions=True):
|
|
# allow one router is hosted by just
|
|
# one enabled l3 agent hosting since active is just a
|
|
# timing problem. Non-active l3 agent can return to
|
|
# active any time
|
|
l3_agents = plugin.get_l3_agents_hosting_routers(
|
|
context, [router_id], admin_state_up=True)
|
|
if l3_agents:
|
|
LOG.debug(_('Router %(router_id)s has already been hosted'
|
|
' by L3 agent %(agent_id)s'),
|
|
{'router_id': router_id,
|
|
'agent_id': l3_agents[0]['id']})
|
|
return
|
|
|
|
sync_router = plugin.get_router(context, router_id)
|
|
active_l3_agents = plugin.get_l3_agents(context, active=True)
|
|
if not active_l3_agents:
|
|
LOG.warn(_('No active L3 agents'))
|
|
return
|
|
candidates = plugin.get_l3_agent_candidates(sync_router,
|
|
active_l3_agents)
|
|
if not candidates:
|
|
LOG.warn(_('No L3 agents can host the router %s'),
|
|
sync_router['id'])
|
|
return
|
|
|
|
chosen_agent = random.choice(candidates)
|
|
binding = agentschedulers_db.RouterL3AgentBinding()
|
|
binding.l3_agent = chosen_agent
|
|
binding.router_id = sync_router['id']
|
|
context.session.add(binding)
|
|
LOG.debug(_('Router %(router_id)s is scheduled to '
|
|
'L3 agent %(agent_id)s'),
|
|
{'router_id': sync_router['id'],
|
|
'agent_id': chosen_agent['id']})
|
|
return chosen_agent
|