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#!/usr/bin/env python
#
# -------------------------------------------------------------------------
# Copyright (c) 2018 Intel Corporation Intellectual Property
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# -------------------------------------------------------------------------
#
'''Solver class for constraint type hpa
Hardware Platform Awareness (HPA) constraint plugin'''
# python imports
from conductor.i18n import _LE, _LI
# Conductor imports
from conductor.solver.optimizer.constraints import constraint
# Third-party library imports
from oslo_log import log
LOG = log.getLogger(__name__)
class HPA(constraint.Constraint):
def __init__(self, _name, _type, _demand_list, _priority=0,
_properties=None):
constraint.Constraint.__init__(
self, _name, _type, _demand_list, _priority)
self.properties = _properties
def solve(self, _decision_path, _candidate_list, _request):
'''
Solver for HPA constraint type.
:param _decision_path: decision tree
:param _candidate_list: List of candidates
:param _request: solver request
:return: candidate_list with hpa features and flavor label mapping
'''
# call conductor engine with request parameters
cei = _request.cei
demand_name = _decision_path.current_demand.name
LOG.info(_LI("Solving constraint type '{}' for demand - [{}]").format(
self.constraint_type, demand_name))
vm_label_list = self.properties.get('evaluate')
for vm_demand in vm_label_list:
label_name = vm_demand['flavorLabel']
flavorProperties = vm_demand['flavorProperties']
response = (cei.get_candidates_with_hpa(label_name,
_candidate_list,
flavorProperties))
_candidate_list = response
if not response:
LOG.error(_LE("No matching candidates for HPA exists").format(
label_name))
break
# No need to continue.
return _candidate_list
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