42 lines
1.6 KiB
Python
42 lines
1.6 KiB
Python
# Copyright (c) 2014 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 nova.openstack.common import log as logging
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from nova.scheduler import filters
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LOG = logging.getLogger(__name__)
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class ExactDiskFilter(filters.BaseHostFilter):
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"""Exact Disk Filter."""
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def host_passes(self, host_state, filter_properties):
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"""Return True if host has the exact amount of disk available."""
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instance_type = filter_properties.get('instance_type')
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requested_disk = (1024 * (instance_type['root_gb'] +
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instance_type['ephemeral_gb']) +
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instance_type['swap'])
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if requested_disk != host_state.free_disk_mb:
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LOG.debug("%(host_state)s does not have exactly "
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"%(requested_disk)s MB usable disk, it "
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"has %(usable_disk_mb)s.",
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{'host_state': host_state,
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'requested_disk': requested_disk,
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'usable_disk_mb': host_state.free_disk_mb})
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return False
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return True
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