39 lines
1.5 KiB
Python
39 lines
1.5 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 ExactRamFilter(filters.BaseHostFilter):
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"""Exact RAM 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 RAM available."""
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instance_type = filter_properties.get('instance_type')
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requested_ram = instance_type['memory_mb']
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if requested_ram != host_state.free_ram_mb:
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LOG.debug("%(host_state)s does not have exactly "
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"%(requested_ram)s MB usable RAM, it has "
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"%(usable_ram)s.",
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{'host_state': host_state,
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'requested_ram': requested_ram,
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'usable_ram': host_state.free_ram_mb})
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return False
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return True
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