52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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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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from sqlalchemy import Column, Integer, MetaData, Table
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from nova import log as logging
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meta = MetaData()
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LOG = logging.getLogger(__name__)
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# Add disk_available_least column to compute_nodes table.
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# Thinking about qcow2 image support, both compressed and virtual disk size
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# has to be considered.
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# disk_available stores "total disk size - used disk(compressed disk size)",
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# while disk_available_least stores
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# "total disk size - used disk(virtual disk size)".
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# virtual disk size is used for kvm block migration.
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compute_nodes = Table('compute_nodes', meta,
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Column('id', Integer(), primary_key=True, nullable=False))
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disk_available_least = Column('disk_available_least', Integer(), default=0)
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def upgrade(migrate_engine):
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meta.bind = migrate_engine
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try:
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compute_nodes.create_column(disk_available_least)
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except Exception:
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LOG.error(_("progress column not added to compute_nodes table"))
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raise
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def downgrade(migrate_engine):
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meta.bind = migrate_engine
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compute_nodes.drop_column(disk_available_least)
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