fc5e46802e
Implements blueprint embrane-lbaas-driver This commit implements Embrane's driver for LBaaS, which uses Embrane's heleos(tm) appliances to provide Load Balancing. Change-Id: Ia76fbc8881d178cfe6df11a2cfe8e77d3f36094f
72 lines
2.8 KiB
Python
72 lines
2.8 KiB
Python
# Copyright 2014 Embrane, Inc.
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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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#
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# @author: Ivar Lazzaro, Embrane, Inc. ivar@embrane.com
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from heleosapi import exceptions as h_exc
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from neutron import context
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from neutron.db.loadbalancer import loadbalancer_db as ldb
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from neutron.db import servicetype_db as sdb
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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.plugins.common import constants as ccon
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from neutron.plugins.embrane.common import contexts as embrane_ctx
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from neutron.services.loadbalancer.drivers.embrane import constants as econ
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LOG = logging.getLogger(__name__)
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skip_states = [ccon.PENDING_CREATE,
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ccon.PENDING_DELETE,
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ccon.PENDING_UPDATE,
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ccon.ERROR]
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class Poller(object):
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def __init__(self, driver):
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self.dispatcher = driver._dispatcher
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service_type_manager = sdb.ServiceTypeManager.get_instance()
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self.provider = (service_type_manager.get_service_providers(
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None, filters={
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'service_type': [ccon.LOADBALANCER],
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'driver': ['neutron.services.loadbalancer.drivers.'
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'embrane.driver.EmbraneLbaas']}))[0]['name']
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def start_polling(self, interval):
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loop_call = loopingcall.FixedIntervalLoopingCall(self._run)
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loop_call.start(interval=interval)
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return loop_call
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def _run(self):
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ctx = context.get_admin_context()
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try:
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self.synchronize_vips(ctx)
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except h_exc.PollingException as e:
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LOG.exception(_('Unhandled exception occurred'), e)
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def synchronize_vips(self, ctx):
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session = ctx.session
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vips = session.query(ldb.Vip).join(
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sdb.ProviderResourceAssociation,
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sdb.ProviderResourceAssociation.resource_id ==
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ldb.Vip.pool_id).filter(
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sdb.ProviderResourceAssociation.provider_name == self.provider)
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# No need to check pending states
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for vip in vips:
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if vip['status'] not in skip_states:
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self.dispatcher.dispatch_lb(
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d_context=embrane_ctx.DispatcherContext(
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econ.Events.POLL_GRAPH, vip, ctx, None),
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args=())
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