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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
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Ivar Lazzaro
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Mar 12, 2014
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61 changes: 61 additions & 0 deletions
61
neutron/db/migration/alembic_migrations/versions/33dd0a9fa487_embrane_lbaas_driver.py
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| # vim: tabstop=4 shiftwidth=4 softtabstop=4 | ||
| # | ||
| # Copyright 2014 OpenStack Foundation | ||
| # | ||
| # 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. | ||
| # | ||
|
|
||
| """embrane_lbaas_driver | ||
| Revision ID: 33dd0a9fa487 | ||
| Revises: 19180cf98af6 | ||
| Create Date: 2014-02-25 00:15:35.567111 | ||
| """ | ||
|
|
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| # revision identifiers, used by Alembic. | ||
| revision = '33dd0a9fa487' | ||
| down_revision = '19180cf98af6' | ||
|
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| # Change to ['*'] if this migration applies to all plugins | ||
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| migration_for_plugins = [ | ||
| 'neutron.services.loadbalancer.plugin.LoadBalancerPlugin' | ||
| ] | ||
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| from alembic import op | ||
| import sqlalchemy as sa | ||
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| from neutron.db import migration | ||
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| def upgrade(active_plugins=None, options=None): | ||
| if not migration.should_run(active_plugins, migration_for_plugins): | ||
| return | ||
|
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| op.create_table( | ||
| u'embrane_pool_port', | ||
| sa.Column(u'pool_id', sa.String(length=36), nullable=False), | ||
| sa.Column(u'port_id', sa.String(length=36), nullable=False), | ||
| sa.ForeignKeyConstraint(['pool_id'], [u'pools.id'], | ||
| name=u'embrane_pool_port_ibfk_1'), | ||
| sa.ForeignKeyConstraint(['port_id'], [u'ports.id'], | ||
| name=u'embrane_pool_port_ibfk_2'), | ||
| sa.PrimaryKeyConstraint(u'pool_id')) | ||
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| def downgrade(active_plugins=None, options=None): | ||
| if not migration.should_run(active_plugins, migration_for_plugins): | ||
| return | ||
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| op.drop_table(u'embrane_pool_port') |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| Embrane LBaaS Driver | ||
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| This DRIVER interfaces OpenStack Neutron with Embrane's heleos platform, | ||
| Load Balancing appliances for cloud environments. | ||
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| L2 connectivity is leveraged by one of the supported existing plugins. | ||
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| For more details on use, configuration and implementation please refer to: | ||
| https://wiki.openstack.org/wiki/Neutron/LBaaS/EmbraneDriver |
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neutron/services/loadbalancer/drivers/embrane/agent/dispatcher.py
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,108 @@ | ||
| # Copyright 2014 Embrane, Inc. | ||
| # 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. | ||
| # | ||
| # @author: Ivar Lazzaro, Embrane, Inc. ivar@embrane.com | ||
|
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| from eventlet import greenthread | ||
| from eventlet import queue | ||
| from heleosapi import exceptions as h_exc | ||
|
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| from neutron.openstack.common import log as logging | ||
| from neutron.plugins.embrane.common import contexts as ctx | ||
| from neutron.services.loadbalancer.drivers.embrane.agent import lb_operations | ||
| from neutron.services.loadbalancer.drivers.embrane import constants as econ | ||
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| LOG = logging.getLogger(__name__) | ||
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| class Dispatcher(object): | ||
| def __init__(self, driver, async=True): | ||
| self._async = async | ||
| self._driver = driver | ||
| self.sync_items = dict() | ||
| self.handlers = lb_operations.handlers | ||
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| def dispatch_lb(self, d_context, *args, **kwargs): | ||
| item = d_context.item | ||
| event = d_context.event | ||
| n_context = d_context.n_context | ||
| chain = d_context.chain | ||
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| item_id = item["id"] | ||
| if event in self.handlers: | ||
| for f in self.handlers[event]: | ||
| first_run = False | ||
| if item_id not in self.sync_items: | ||
| self.sync_items[item_id] = [queue.Queue()] | ||
| first_run = True | ||
| self.sync_items[item_id][0].put( | ||
| ctx.OperationContext(event, n_context, item, chain, f, | ||
| args, kwargs)) | ||
| if first_run: | ||
| t = greenthread.spawn(self._consume_lb, | ||
| item_id, | ||
| self.sync_items[item_id][0], | ||
| self._driver, | ||
| self._async) | ||
| self.sync_items[item_id].append(t) | ||
| if not self._async: | ||
| t = self.sync_items[item_id][1] | ||
| t.wait() | ||
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| def _consume_lb(self, sync_item, sync_queue, driver, a_sync): | ||
| current_state = None | ||
| while True: | ||
| try: | ||
| if current_state == econ.DELETED: | ||
| del self.sync_items[sync_item] | ||
| return | ||
| try: | ||
| operation_context = sync_queue.get( | ||
| block=a_sync, | ||
| timeout=econ.QUEUE_TIMEOUT) | ||
| except queue.Empty: | ||
| del self.sync_items[sync_item] | ||
| return | ||
|
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| (operation_context.chain and | ||
| operation_context.chain.execute_all()) | ||
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| transient_state = None | ||
| try: | ||
| transient_state = operation_context.function( | ||
| driver, operation_context.n_context, | ||
| operation_context.item, *operation_context.args, | ||
| **operation_context.kwargs) | ||
| except (h_exc.PendingDva, h_exc.DvaNotFound, | ||
| h_exc.BrokenInterface, h_exc.DvaCreationFailed, | ||
| h_exc.BrokenDva, h_exc.ConfigurationFailed) as ex: | ||
| LOG.warning(econ.error_map[type(ex)], ex.message) | ||
| except h_exc.DvaDeleteFailed as ex: | ||
| LOG.warning(econ.error_map[type(ex)], ex.message) | ||
| transient_state = econ.DELETED | ||
| finally: | ||
| # if the returned transient state is None, no operations | ||
| # are required on the DVA status | ||
| if transient_state == econ.DELETED: | ||
| current_state = driver._delete_vip( | ||
| operation_context.n_context, | ||
| operation_context.item) | ||
| # Error state cannot be reverted | ||
| else: | ||
| driver._update_vip_graph_state( | ||
| operation_context.n_context, | ||
| operation_context.item) | ||
| except Exception: | ||
| LOG.exception(_('Unhandled exception occurred')) |
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