40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
# Copyright (c) 2011-2012 OpenStack Foundation.
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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 cinder.scheduler import filters
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class AvailabilityZoneFilter(filters.BaseBackendFilter):
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"""Filters Backends by availability zone."""
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# Availability zones do not change within a request
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run_filter_once_per_request = True
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def backend_passes(self, backend_state, filter_properties):
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spec = filter_properties.get('request_spec', {})
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availability_zones = spec.get('availability_zones')
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if availability_zones:
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return (backend_state.service['availability_zone']
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in availability_zones)
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props = spec.get('resource_properties', {})
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availability_zone = props.get('availability_zone')
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if availability_zone:
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return (availability_zone ==
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backend_state.service['availability_zone'])
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return True
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