59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
# Copyright (c) 2014 OpenStack Foundation
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#
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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 oslo_log import log as logging
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from nova.i18n import _LW
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from nova.scheduler import filters
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LOG = logging.getLogger(__name__)
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class ExactCoreFilter(filters.BaseHostFilter):
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"""Exact Core Filter."""
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RUN_ON_REBUILD = False
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def __init__(self, *args, **kwargs):
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super(ExactCoreFilter, self).__init__(*args, **kwargs)
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LOG.warning('ExactCoreFilter is deprecated in Pike and will be '
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'removed in a subsequent release.')
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def host_passes(self, host_state, spec_obj):
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"""Return True if host has the exact number of CPU cores."""
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if not host_state.vcpus_total:
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# Fail safe
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LOG.warning(_LW("VCPUs not set; assuming CPU collection broken"))
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return False
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required_vcpus = spec_obj.vcpus
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usable_vcpus = host_state.vcpus_total - host_state.vcpus_used
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if required_vcpus != usable_vcpus:
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LOG.debug("%(host_state)s does not have exactly "
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"%(requested_vcpus)s cores of usable vcpu, it has "
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"%(usable_vcpus)s.",
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{'host_state': host_state,
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'requested_vcpus': required_vcpus,
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'usable_vcpus': usable_vcpus})
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return False
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# NOTE(mgoddard): Setting the limit ensures that it is enforced in
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# compute. This ensures that if multiple instances are scheduled to a
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# single host, then all after the first will fail in the claim.
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host_state.limits['vcpu'] = host_state.vcpus_total
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return True
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