old_contents: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  #
  # Copyright 2013 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.
  #
  
  """DB Migration for ML2 VXLAN Type Driver
  
  Revision ID: 477a4488d3f4
  Revises: 20ae61555e95
  Create Date: 2013-07-09 14:14:33.158502
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '477a4488d3f4'
  down_revision = '20ae61555e95'
  
  # Change to ['*'] if this migration applies to all plugins
  
  migration_for_plugins = [
      'neutron.plugins.ml2.plugin.Ml2Plugin'
  ]
  
  from alembic import op
  import sqlalchemy as sa
  
  
  from neutron.db import migration
  
  
  def upgrade(active_plugins=None, options=None):
      if not migration.should_run(active_plugins, migration_for_plugins):
          return
  
      op.create_table(
          'ml2_vxlan_allocations',
          sa.Column('vxlan_vni', sa.Integer, nullable=False,
                    autoincrement=False),
          sa.Column('allocated', sa.Boolean, nullable=False),
          sa.PrimaryKeyConstraint('vxlan_vni')
      )
  
      op.create_table(
          'ml2_vxlan_endpoints',
          sa.Column('ip_address', sa.String(length=64)),
          sa.Column('udp_port', sa.Integer(), nullable=False,
                    autoincrement=False),
          sa.PrimaryKeyConstraint('ip_address', 'udp_port')
      )
  
  
  def downgrade(active_plugins=None, options=None):
      if not migration.should_run(active_plugins, migration_for_plugins):
          return
  
      op.drop_table('ml2_vxlan_allocations')
      op.drop_table('ml2_vxlan_endpoint')
  
new_contents: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  #
  # Copyright 2013 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.
  #
  
  """DB Migration for ML2 VXLAN Type Driver
  
  Revision ID: 477a4488d3f4
  Revises: 20ae61555e95
  Create Date: 2013-07-09 14:14:33.158502
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '477a4488d3f4'
  down_revision = '20ae61555e95'
  
  # Change to ['*'] if this migration applies to all plugins
  
  migration_for_plugins = [
      'neutron.plugins.ml2.plugin.Ml2Plugin'
  ]
  
  from alembic import op
  import sqlalchemy as sa
  
  
  from neutron.db import migration
  
  
  def upgrade(active_plugins=None, options=None):
      if not migration.should_run(active_plugins, migration_for_plugins):
          return
  
      op.create_table(
          'ml2_vxlan_allocations',
          sa.Column('vxlan_vni', sa.Integer, nullable=False,
                    autoincrement=False),
          sa.Column('allocated', sa.Boolean, nullable=False),
          sa.PrimaryKeyConstraint('vxlan_vni')
      )
  
      op.create_table(
          'ml2_vxlan_endpoints',
          sa.Column('ip_address', sa.String(length=64)),
          sa.Column('udp_port', sa.Integer(), nullable=False,
                    autoincrement=False),
          sa.PrimaryKeyConstraint('ip_address', 'udp_port')
      )
  
  
  def downgrade(active_plugins=None, options=None):
      if not migration.should_run(active_plugins, migration_for_plugins):
          return
  
      op.drop_table('ml2_vxlan_allocations')
      op.drop_table('ml2_vxlan_endpoints')
  
subject: Fix downgrade in migration