80 lines
3.0 KiB
Python
80 lines
3.0 KiB
Python
# Copyright (c) 2012 OpenStack Foundation
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# Copyright (c) 2012 Cloudscaling
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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 extra_specs_ops
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from nova.scheduler.filters import utils
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LOG = logging.getLogger(__name__)
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_SCOPE = 'aggregate_instance_extra_specs'
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class AggregateInstanceExtraSpecsFilter(filters.BaseHostFilter):
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"""AggregateInstanceExtraSpecsFilter works with InstanceType records."""
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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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RUN_ON_REBUILD = False
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def host_passes(self, host_state, spec_obj):
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"""Return a list of hosts that can create instance_type
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Check that the extra specs associated with the instance type match
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the metadata provided by aggregates. If not present return False.
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"""
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instance_type = spec_obj.flavor
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# If 'extra_specs' is not present or extra_specs are empty then we
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# need not proceed further
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if (not instance_type.obj_attr_is_set('extra_specs')
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or not instance_type.extra_specs):
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return True
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metadata = utils.aggregate_metadata_get_by_host(host_state)
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for key, req in instance_type.extra_specs.items():
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# Either not scope format, or aggregate_instance_extra_specs scope
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scope = key.split(':', 1)
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if len(scope) > 1:
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if scope[0] != _SCOPE:
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continue
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else:
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del scope[0]
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key = scope[0]
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aggregate_vals = metadata.get(key, None)
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if not aggregate_vals:
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LOG.debug(
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"%(host_state)s fails instance_type extra_specs "
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"requirements. Extra_spec %(key)s is not in aggregate.",
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{'host_state': host_state, 'key': key})
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return False
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for aggregate_val in aggregate_vals:
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if extra_specs_ops.match(aggregate_val, req):
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break
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else:
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LOG.debug("%(host_state)s fails instance_type extra_specs "
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"requirements. '%(aggregate_vals)s' do not "
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"match '%(req)s'",
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{'host_state': host_state, 'req': req,
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'aggregate_vals': aggregate_vals})
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return False
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return True
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