41a53cb3f5
We are purging all downgrade methods from icehouse to havana because:
1) havana is going to become unsupported during Kilo cycle.
2) most people will upgrade from icehouse, while a minor percentage
from havana
3) downgrade use cases are mostly to revert after failed upgrades
See discussion in https://review.openstack.org/109952 for details.
This change removes all downgrade code in this migrations and raises
an exception in downgrade of icehouse_release.
Partially-implements: blueprint reorganize-migrations
Change-Id: I874dd2475da0404370dc7e53d7c43e0a8dce0d56
47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
# Copyright 2014 Yahoo! Inc.
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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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"""icehouse
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Revision ID: icehouse
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Revises: 5ac1c354a051
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Create Date: 2013-03-28 00:00:00.000000
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"""
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# revision identifiers, used by Alembic.
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revision = 'icehouse'
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down_revision = '5ac1c354a051'
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# Change to ['*'] if this migration applies to all plugins
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migration_for_plugins = ['*']
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def upgrade(active_plugins=None, options=None):
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"""A no-op migration for marking the Icehouse release."""
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pass
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def downgrade(active_plugins=None, options=None):
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# We are purging all downgrade methods from icehouse to havana because:
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# 1) havana is going to become unsupported during Kilo cycle.
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# 2) most people will upgrade from icehouse, while a minor percentage
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# from havana
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# 3) downgrade use cases are mostly to revert after failed upgrades
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# See discussion in https://review.openstack.org/109952 for details
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raise NotImplementedError("Downgrade from icehouse to havana not "
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"supported") |