74 lines
2.3 KiB
Python
74 lines
2.3 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2013 OpenStack Foundation
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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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"""Add a unique constraint on (agent_type, host) columns to prevent a race
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condition when an agent entry is 'upserted'.
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Revision ID: 1fcfc149aca4
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Revises: e197124d4b9
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Create Date: 2013-11-27 18:35:28.148680
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"""
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revision = '1fcfc149aca4'
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down_revision = 'e197124d4b9'
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migration_for_plugins = [
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'neutron.plugins.brocade.NeutronPlugin.BrocadePluginV2',
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'neutron.plugins.openvswitch.ovs_neutron_plugin.OVSNeutronPluginV2',
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'neutron.plugins.linuxbridge.lb_neutron_plugin.LinuxBridgePluginV2',
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'neutron.plugins.nec.nec_plugin.NECPluginV2',
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'neutron.plugins.nicira.NeutronPlugin.NvpPluginV2',
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'neutron.plugins.nicira.NeutronServicePlugin.NvpAdvancedPlugin',
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'neutron.plugins.vmware.plugin.NsxPlugin',
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'neutron.plugins.vmware.plugin.NsxServicePlugin',
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'neutron.services.loadbalancer.plugin.LoadBalancerPlugin',
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'neutron.plugins.ibm.sdnve_neutron_plugin.SdnvePluginV2',
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'neutron.plugins.oneconvergence.plugin.OneConvergencePluginV2',
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'neutron.plugins.mlnx.mlnx_plugin.MellanoxEswitchPlugin',
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]
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from alembic import op
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from neutron.db import migration
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TABLE_NAME = 'agents'
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UC_NAME = 'uniq_agents0agent_type0host'
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def upgrade(active_plugins=None, options=None):
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if not migration.should_run(active_plugins, migration_for_plugins):
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return
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op.create_unique_constraint(
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name=UC_NAME,
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source=TABLE_NAME,
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local_cols=['agent_type', 'host']
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)
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def downgrade(active_plugins=None, options=None):
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if not migration.should_run(active_plugins, migration_for_plugins):
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return
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op.drop_constraint(
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name=UC_NAME,
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table_name=TABLE_NAME,
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type_='unique'
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)
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