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#!/usr/bin/env python
#
# -------------------------------------------------------------------------
# Copyright (c) 2015-2017 AT&T 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.
#
# -------------------------------------------------------------------------
#
"""Constraint/Engine Interface
Utility library that defines the interface between
the constraints and the conductor data engine.
"""
from oslo_log import log
LOG = log.getLogger(__name__)
class ConstraintEngineInterface(object):
def __init__(self, client):
self.client = client
def get_candidate_location(self, candidate):
# Try calling a method (remember, "calls" are synchronous)
# FIXME(jdandrea): Doing this because Music calls are expensive.
lat = candidate.get('latitude')
lon = candidate.get('longitude')
if lat and lon:
response = (float(lat), float(lon))
else:
ctxt = {}
args = {"candidate": candidate}
response = self.client.call(ctxt=ctxt,
method="get_candidate_location",
args=args)
LOG.debug("get_candidate_location response: {}".format(response))
return response
def get_candidate_zone(self, candidate, _category=None):
# FIXME(jdandrea): Doing this because Music calls are expensive.
if _category == 'region':
response = candidate['location_id']
elif _category == 'complex':
response = candidate['complex_name']
elif _category == 'country':
response = candidate['country']
else:
ctxt = {}
args = {"candidate": candidate, "category": _category}
response = self.client.call(ctxt=ctxt,
method="get_candidate_zone",
args=args)
LOG.debug("get_candidate_zone response: {}".format(response))
return response
def get_candidates_from_service(self, constraint_name,
constraint_type, candidate_list,
controller, inventory_type,
request, cost, demand_name,
request_type):
ctxt = {}
args = {"constraint_name": constraint_name,
"constraint_type": constraint_type,
"candidate_list": candidate_list,
"controller": controller,
"inventory_type": inventory_type,
"request": request,
"cost": cost,
"demand_name": demand_name,
"request_type": request_type}
response = self.client.call(ctxt=ctxt,
method="get_candidates_from_service",
args=args)
LOG.debug("get_candidates_from_service response: {}".format(response))
# response is a list of (candidate, cost) tuples
return response
def get_inventory_group_candidates(self, candidate_list,
demand_name, resolved_candidate):
# return a list of the "pair" candidates for the given candidate
ctxt = {}
args = {"candidate_list": candidate_list,
"demand_name": demand_name,
"resolved_candidate": resolved_candidate}
response = self.client.call(ctxt=ctxt,
method="get_inventory_group_candidates",
args=args)
LOG.debug("get_inventory_group_candidates \
response: {}".format(response))
return response
def get_candidates_by_attributes(self, demand_name,
candidate_list, properties):
ctxt = {}
args = {"candidate_list": candidate_list,
"properties": properties,
"demand_name": demand_name}
response = self.client.call(ctxt=ctxt,
method="get_candidates_by_attributes",
args=args)
LOG.debug("get_candidates_by_attribute response: {}".format(response))
# response is a list of (candidate, cost) tuples
return response
def get_candidates_with_hpa(self, id, type, directives, candidate_list,
flavorProperties):
'''
Returns the candidate_list with an addition of flavor_mapping for
matching cloud candidates with hpa constraints.
:param label_name: vm_label_name passed from the SO/Policy
:param candidate_list: list of candidates to process
:param flavorProperties: hpa features for this vm_label_name
:return: candidate_list with hpa features and flavor mapping
'''
ctxt = {}
args = {"candidate_list": candidate_list,
"flavorProperties": flavorProperties,
"id": id,
"type": type,
"directives": directives}
response = self.client.call(ctxt=ctxt,
method="get_candidates_with_hpa",
args=args)
LOG.debug("get_candidates_with_hpa response: {}".format(response))
return response
def get_candidates_with_vim_capacity(self, candidate_list, vim_request):
'''
Returns the candidate_list with required vim capacity.
:param candidate_list: list of candidates to process
:param requests: vim requests with required cpu, memory and disk
:return: candidate_list with required vim capacity.
'''
ctxt = {}
args = {"candidate_list": candidate_list,
"request": vim_request}
response = self.client.call(ctxt=ctxt,
method="get_candidates_with_vim_capacity",
args=args)
LOG.debug(
"get_candidates_with_vim_capacity response: {}".format(response))
return response
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