c4848cd472
Quota check for create/delete/resize volume Quota is implemented as a decorator, which can be easy enabled and disabled if wanted. The quota feature uses a reservation system that reserves resources prior to usage. BP https://blueprints.launchpad.net/reddwarf/+spec/quotas Change-Id: I5df82c8f1d7b40311b5d5d7301992607f98e9b2a
55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack LLC.
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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 MetaData
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from sqlalchemy import Table
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from sqlalchemy import orm
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from sqlalchemy.orm import exc as orm_exc
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def map(engine, models):
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meta = MetaData()
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meta.bind = engine
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if mapping_exists(models['instance']):
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return
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orm.mapper(models['instance'], Table('instances', meta, autoload=True))
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orm.mapper(models['root_enabled_history'],
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Table('root_enabled_history', meta, autoload=True))
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orm.mapper(models['service_image'],
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Table('service_images', meta, autoload=True))
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orm.mapper(models['service_statuses'],
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Table('service_statuses', meta, autoload=True))
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orm.mapper(models['dns_records'],
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Table('dns_records', meta, autoload=True))
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orm.mapper(models['agent_heartbeats'],
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Table('agent_heartbeats', meta, autoload=True))
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orm.mapper(models['quotas'],
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Table('quotas', meta, autoload=True))
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orm.mapper(models['quota_usages'],
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Table('quota_usages', meta, autoload=True))
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orm.mapper(models['reservations'],
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Table('reservations', meta, autoload=True))
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def mapping_exists(model):
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try:
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orm.class_mapper(model)
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return True
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except orm_exc.UnmappedClassError:
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return False
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