3aa88d65ad
Part of Support Nested Stacks and Updates story To add nested stack support to Valet, make up for missing Heat resource Orchestration IDs in nested resources by generating a subset of Heat stack lifecycle scheduler hints for each resource in advance, store them as opaque metadata in Valet, then leverage the metadata at Nova scheduling time. Make additional accommodations in anticipation of complexities brought about by adding support for stack updates. Change-Id: Ifed5b0f8172e522caf7e520f8131f23d4d336f4f Story: #2001139 Task: #4855
97 lines
3.6 KiB
Python
97 lines
3.6 KiB
Python
#
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# Copyright 2014-2017 AT&T Intellectual Property
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo_log import log
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from valet.engine.optimizer.ostro.filters.aggregate_instance_filter \
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import AggregateInstanceExtraSpecsFilter
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from valet.engine.optimizer.ostro.filters.az_filter \
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import AvailabilityZoneFilter
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from valet.engine.optimizer.ostro.filters.cpu_filter import CPUFilter
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from valet.engine.optimizer.ostro.filters.disk_filter import DiskFilter
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from valet.engine.optimizer.ostro.filters.diversity_filter \
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import DiversityFilter
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from valet.engine.optimizer.ostro.filters.mem_filter import MemFilter
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from valet.engine.optimizer.ostro.filters.named_affinity_filter \
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import NamedAffinityFilter
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from valet.engine.optimizer.ostro.filters.named_diversity_filter \
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import NamedDiversityFilter
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from valet.engine.optimizer.ostro.filters.named_exclusivity_filter \
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import NamedExclusivityFilter
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from valet.engine.optimizer.ostro.filters.no_exclusivity_filter \
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import NoExclusivityFilter
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LOG = log.getLogger(__name__)
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class ConstraintSolver(object):
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"""Solver to filter out candidate hosts."""
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def __init__(self):
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"""Instantiate filters to help enforce constraints."""
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self.filter_list = []
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self.filter_list.append(NamedAffinityFilter())
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self.filter_list.append(NamedDiversityFilter())
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self.filter_list.append(DiversityFilter())
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self.filter_list.append(NamedExclusivityFilter())
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self.filter_list.append(NoExclusivityFilter())
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self.filter_list.append(AvailabilityZoneFilter())
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self.filter_list.append(AggregateInstanceExtraSpecsFilter())
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self.filter_list.append(CPUFilter())
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self.filter_list.append(MemFilter())
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self.filter_list.append(DiskFilter())
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self.status = "success"
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def get_candidate_list(self, _n, _node_placements, _avail_resources,
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_avail_groups):
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"""Filter candidate hosts using a list of filters."""
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level = _avail_resources.level
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candidate_list = []
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for _, r in _avail_resources.candidates.iteritems():
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candidate_list.append(r)
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if len(candidate_list) == 0:
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self.status = "no candidate for node = " + _n.orch_id
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LOG.warn(self.status)
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return candidate_list
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LOG.debug("num of candidates = " + str(len(candidate_list)))
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for f in self.filter_list:
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f.init_condition()
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if not f.check_pre_condition(level, _n, _node_placements,
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_avail_groups):
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if f.status is not None:
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self.status = f.status
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LOG.error(self.status)
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return []
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continue
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candidate_list = f.filter_candidates(level, _n, candidate_list)
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if len(candidate_list) == 0:
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self.status = "violate {} constraint for node {} ".format(f.name, _n.orch_id)
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LOG.error(self.status)
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return []
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LOG.debug("pass " + f.name + " with num of candidates = " + str(len(candidate_list)))
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return candidate_list
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