58 lines
2.4 KiB
Python
58 lines
2.4 KiB
Python
# 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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from sqlalchemy import MetaData, Table, func, select
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from nova import exception
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from nova.i18n import _
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from nova import objects
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def upgrade(migrate_engine):
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meta = MetaData()
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meta.bind = migrate_engine
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flavors = Table('flavors', meta, autoload=True)
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count = select([func.count()]).select_from(flavors).scalar()
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if count == 0:
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# NOTE(danms): We need to be careful here if this is a new
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# installation, which can't possibly have any mappings. Check
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# to see if any flavors are defined to determine if we are
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# upgrading an existing system. If not, then don't obsess over
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# the lack of mappings
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return
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cell_mappings = Table('cell_mappings', meta, autoload=True)
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count = select([func.count()]).select_from(cell_mappings).scalar()
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# Two mappings are required at a minimum, cell0 and your first cell
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if count < 2:
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msg = _('Cell mappings are not created, but required for Ocata. '
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'Please run nova-manage cell_v2 simple_cell_setup before '
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'continuing.')
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raise exception.ValidationError(detail=msg)
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count = select([func.count()]).select_from(cell_mappings).where(
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cell_mappings.c.uuid == objects.CellMapping.CELL0_UUID).scalar()
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if count != 1:
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msg = _('A mapping for Cell0 was not found, but is required for '
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'Ocata. Please run nova-manage cell_v2 simple_cell_setup '
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'before continuing.')
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raise exception.ValidationError(detail=msg)
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host_mappings = Table('host_mappings', meta, autoload=True)
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count = select([func.count()]).select_from(host_mappings).scalar()
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if count == 0:
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msg = _('No host mappings were found, but are required for Ocata. '
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'Please run nova-manage cell_v2 simple_cell_setup before '
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'continuing.')
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raise exception.ValidationError(detail=msg)
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