82 lines
2.9 KiB
Python
82 lines
2.9 KiB
Python
# Copyright (c) 2012 The Cloudscaling Group, Inc.
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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.scheduler import filters
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from nova.scheduler.filters import utils
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LOG = logging.getLogger(__name__)
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class TypeAffinityFilter(filters.BaseHostFilter):
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"""DEPRECATED: TypeAffinityFilter doesn't allow more than one VM type
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per host.
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Note: this works best with ram_weight_multiplier
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(spread) set to 1 (default).
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"""
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RUN_ON_REBUILD = False
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def __init__(self):
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super(TypeAffinityFilter, self).__init__()
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LOG.warning('TypeAffinityFilter is deprecated for removal in the '
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'17.0.0 Queens release. There is no replacement planned '
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'for this filter. It is fundamentally flawed in that it '
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'relies on the flavors.id primary key and if a flavor '
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'\"changed\" (deleted and re-created with new values) '
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'it will result in this filter thinking it is a '
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'different flavor, thus breaking the usefulness of this '
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'filter.')
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def host_passes(self, host_state, spec_obj):
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"""Dynamically limits hosts to one instance type
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Return False if host has any instance types other than the requested
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type. Return True if all instance types match or if host is empty.
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"""
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instance_type = spec_obj.flavor
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instance_type_id = instance_type.id
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other_types_on_host = utils.other_types_on_host(host_state,
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instance_type_id)
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return not other_types_on_host
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class AggregateTypeAffinityFilter(filters.BaseHostFilter):
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"""AggregateTypeAffinityFilter limits instance_type by aggregate
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return True if no instance_type key is set or if the aggregate metadata
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key 'instance_type' has the instance_type name as a value
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"""
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# Aggregate data does not change within a request
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run_filter_once_per_request = True
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RUN_ON_REBUILD = False
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def host_passes(self, host_state, spec_obj):
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instance_type = spec_obj.flavor
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aggregate_vals = utils.aggregate_values_from_key(
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host_state, 'instance_type')
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for val in aggregate_vals:
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if (instance_type.name in
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[x.strip() for x in val.split(',')]):
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return True
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return not aggregate_vals
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