109 lines
3.4 KiB
Python
109 lines
3.4 KiB
Python
# Copyright (c) 2016 EMC Corporation.
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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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"""Remove host from driver private data
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Revision ID: e8ea58723178
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Revises: fdfb668d19e1
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Create Date: 2016-07-11 12:59:34.579291
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"""
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# revision identifiers, used by Alembic.
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revision = 'e8ea58723178'
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down_revision = 'fdfb668d19e1'
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from alembic import op
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from oslo_log import log
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from oslo_utils import uuidutils
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import sqlalchemy as sql
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from manila.db.migrations import utils
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from manila.i18n import _LI, _LE
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LOG = log.getLogger(__name__)
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TABLE_NAME = 'drivers_private_data'
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COLUMN_HOST = 'host'
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DEFAULT_HOST = 'unknown'
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COLUMN_ENTITY = 'entity_uuid'
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COLUMN_KEY = 'key'
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def upgrade():
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try:
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op.drop_column(TABLE_NAME, COLUMN_HOST)
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except Exception:
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LOG.error(_LE("Column '%s' could not be dropped"), COLUMN_HOST)
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raise
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def downgrade():
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connection = op.get_bind()
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from_table = utils.load_table(TABLE_NAME, connection)
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migration_table_name = "_migrating_%(table)s_%(session)s" % {
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'table': TABLE_NAME,
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'session': uuidutils.generate_uuid()[:8]
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}
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LOG.info(_LI("Creating the migration table %(table)s"), {
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'table': migration_table_name
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})
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migration_table = op.create_table(
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migration_table_name,
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sql.Column('created_at', sql.DateTime),
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sql.Column('updated_at', sql.DateTime),
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sql.Column('deleted_at', sql.DateTime),
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sql.Column('deleted', sql.Integer, default=0),
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sql.Column('host', sql.String(255),
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nullable=False, primary_key=True),
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sql.Column('entity_uuid', sql.String(36),
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nullable=False, primary_key=True),
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sql.Column('key', sql.String(255),
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nullable=False, primary_key=True),
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sql.Column('value', sql.String(1023), nullable=False),
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mysql_engine='InnoDB',
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)
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LOG.info(_LI("Copying data from %(from_table)s to the migration "
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"table %(migration_table)s") % {
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'from_table': TABLE_NAME,
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'migration_table': migration_table_name
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})
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rows = []
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for row in op.get_bind().execute(from_table.select()):
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rows.append({
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'created_at': row.created_at,
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'updated_at': row.updated_at,
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'deleted_at': row.deleted_at,
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'deleted': row.deleted,
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'host': DEFAULT_HOST,
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'entity_uuid': row.entity_uuid,
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'key': row.key,
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'value': row.value
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})
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op.bulk_insert(migration_table, rows)
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LOG.info(_LI("Dropping table %(from_table)s") % {
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'from_table': TABLE_NAME
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})
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op.drop_table(TABLE_NAME)
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LOG.info(_LI("Rename the migration table %(migration_table)s to "
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"the original table %(from_table)s") % {
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'migration_table': migration_table_name,
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'from_table': TABLE_NAME
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})
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op.rename_table(migration_table_name, TABLE_NAME)
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