61 lines
2.3 KiB
Python
61 lines
2.3 KiB
Python
# Copyright (c) 2013 Cloudwatt
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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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import six
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import nova.conf
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from nova.scheduler import filters
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from nova.scheduler.filters import utils
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CONF = nova.conf.CONF
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LOG = logging.getLogger(__name__)
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class AggregateImagePropertiesIsolation(filters.BaseHostFilter):
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"""AggregateImagePropertiesIsolation works with image properties."""
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# Aggregate data and instance type does not change within a request
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run_filter_once_per_request = True
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def host_passes(self, host_state, spec_obj):
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"""Checks a host in an aggregate that metadata key/value match
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with image properties.
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"""
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cfg_namespace = CONF.aggregate_image_properties_isolation_namespace
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cfg_separator = CONF.aggregate_image_properties_isolation_separator
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image_props = spec_obj.image.properties if spec_obj.image else {}
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metadata = utils.aggregate_metadata_get_by_host(host_state)
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for key, options in six.iteritems(metadata):
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if (cfg_namespace and
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not key.startswith(cfg_namespace + cfg_separator)):
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continue
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prop = image_props.get(key)
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# NOTE(sbauza): Aggregate metadata is only strings, we need to
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# stringify the property to match with the option
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# TODO(sbauza): Fix that very ugly pattern matching
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if prop and str(prop) not in options:
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LOG.debug("%(host_state)s fails image aggregate properties "
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"requirements. Property %(prop)s does not "
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"match %(options)s.",
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{'host_state': host_state,
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'prop': prop,
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'options': options})
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return False
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return True
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