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Diffstat (limited to 'apps/placement/optimizers/conductor/translation.py')
| -rw-r--r-- | apps/placement/optimizers/conductor/translation.py | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/apps/placement/optimizers/conductor/translation.py b/apps/placement/optimizers/conductor/translation.py new file mode 100644 index 0000000..d361755 --- /dev/null +++ b/apps/placement/optimizers/conductor/translation.py @@ -0,0 +1,283 @@ +# ------------------------------------------------------------------------- +# 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. +# +# ------------------------------------------------------------------------- +# +import copy +import json +import yaml +import re + +from osdf.utils.data_conversion import text_to_symbol +from osdf.utils.programming_utils import dot_notation + +policy_config_mapping = yaml.safe_load(open('config/has_config.yaml')).get('policy_config_mapping') + + +def get_opt_query_data(req_json, policies): + """ + Fetch service and order specific details from the requestParameters field of a request. + :param req_json: a request file + :param policies: A set of policies + :return: A dictionary with service and order-specific attributes. + """ + req_param_dict = {} + if 'requestParameters' in req_json["placementInfo"]: + req_params = req_json["placementInfo"]["requestParameters"] + for policy in policies: + for queryProp in policy['content']['queryProperties']: + attr_val = queryProp['value'] if 'value' in queryProp and queryProp['value'] != "" \ + else dot_notation(req_params, queryProp['attribute_location']) + if attr_val is not None: + req_param_dict.update({queryProp['attribute']: attr_val}) + return req_param_dict + + +def gen_optimization_policy(vnf_list, optimization_policy): + """Generate optimization policy details to pass to Conductor + :param vnf_list: List of vnf's to used in placement request + :param optimization_policy: optimization objective policy information provided in the incoming request + :return: List of optimization objective policies in a format required by Conductor + """ + optimization_policy_list = [] + for policy in optimization_policy: + content = policy['content'] + parameter_list = [] + parameters = ["cloud_version", "hpa_score"] + + for attr in content['objectiveParameter']['parameterAttributes']: + parameter = attr['parameter'] if attr['parameter'] in parameters else attr['parameter']+"_between" + vnfs = get_matching_vnfs(attr['resources'], vnf_list) + for vnf in vnfs: + value = [vnf] if attr['parameter'] in parameters else [attr['customerLocationInfo'], vnf] + parameter_list.append({ + attr['operator']: [attr['weight'], {parameter: value}] + }) + + optimization_policy_list.append({ + content['objective']: {content['objectiveParameter']['operator']: parameter_list } + }) + return optimization_policy_list + + +def get_matching_vnfs(resources, vnf_list, match_type="intersection"): + """Get a list of matching VNFs from the list of resources + :param resources: + :param vnf_list: List of vnfs to used in placement request + :param match_type: "intersection" or "all" or "any" (any => send all_vnfs if there is any intersection) + :return: List of matching VNFs + """ + resources_lcase = [x.lower() for x in resources] + if match_type == "all": # don't bother with any comparisons + return resources if set(resources_lcase) <= set(vnf_list) else None + common_vnfs = set(vnf_list) & set(resources_lcase) + common_resources = [x for x in resources if x.lower() in common_vnfs] + if match_type == "intersection": # specifically requested intersection + return list(common_resources) + return resources if common_vnfs else None # "any" match => all resources to be returned + + +def gen_policy_instance(vnf_list, resource_policy, match_type="intersection", rtype=None): + """Generate a list of policies + :param vnf_list: List of vnf's to used in placement request + :param resource_policy: policy for this specific resource + :param match_type: How to match the vnf_names with the vnf_list (intersection or "any") + intersection => return intersection; "any" implies return all vnf_names if intersection is not null + :param rtype: resource type (e.g. resourceRegionProperty or resourceInstanceProperty) + None => no controller information added to the policy specification to Conductor + :return: resource policy list in a format required by Conductor + """ + resource_policy_list = [] + related_policies = [] + for policy in resource_policy: + pc = policy['content'] + demands = get_matching_vnfs(pc['resources'], vnf_list, match_type=match_type) + resource = {pc['identity']: {'type': pc['policyType'], 'demands': demands}} + + if rtype: + resource[pc['identity']]['properties'] = {'controller': pc[rtype]['controller'], + 'request': json.loads(pc[rtype]['request'])} + if demands and len(demands) != 0: + resource_policy_list.append(resource) + related_policies.append(policy) + return resource_policy_list, related_policies + + +def gen_resource_instance_policy(vnf_list, resource_instance_policy): + """Get policies governing resource instances in order to populate the Conductor API call""" + cur_policies, _ = gen_policy_instance(vnf_list, resource_instance_policy, rtype='resourceInstanceProperty') + return cur_policies + + +def gen_resource_region_policy(vnf_list, resource_region_policy): + """Get policies governing resource region in order to populate the Conductor API call""" + cur_policies, _ = gen_policy_instance(vnf_list, resource_region_policy, rtype='resourceRegionProperty') + return cur_policies + + +def gen_inventory_group_policy(vnf_list, inventory_group_policy): + """Get policies governing inventory group in order to populate the Conductor API call""" + cur_policies, _ = gen_policy_instance(vnf_list, inventory_group_policy, rtype=None) + return cur_policies + + +def gen_reservation_policy(vnf_list, reservation_policy): + """Get policies governing resource instances in order to populate the Conductor API call""" + cur_policies, _ = gen_policy_instance(vnf_list, reservation_policy, rtype='instanceReservationProperty') + return cur_policies + + +def gen_distance_to_location_policy(vnf_list, distance_to_location_policy): + """Get policies governing distance-to-location for VNFs in order to populate the Conductor API call""" + cur_policies, related_policies = gen_policy_instance(vnf_list, distance_to_location_policy, rtype=None) + for p_new, p_main in zip(cur_policies, related_policies): # add additional fields to each policy + properties = p_main['content']['distanceProperties'] + pcp_d = properties['distance'] + p_new[p_main['content']['identity']]['properties'] = { + 'distance': pcp_d['operator'] + " " + pcp_d['value'].lower() + " " + pcp_d['unit'].lower(), + 'location': properties['locationInfo'] + } + return cur_policies + + +def gen_attribute_policy(vnf_list, attribute_policy): + """Get policies governing attributes of VNFs in order to populate the Conductor API call""" + cur_policies, related_policies = gen_policy_instance(vnf_list, attribute_policy, rtype=None) + for p_new, p_main in zip(cur_policies, related_policies): # add additional fields to each policy + properties = p_main['content']['cloudAttributeProperty'] + attribute_mapping = policy_config_mapping['attributes'] # wanted attributes and mapping + p_new[p_main['content']['identity']]['properties'] = { + 'evaluate': dict((k, properties.get(attribute_mapping.get(k))) for k in attribute_mapping.keys()) + } + return cur_policies # cur_policies gets updated in place... + + +def gen_zone_policy(vnf_list, zone_policy): + """Get zone policies in order to populate the Conductor API call""" + cur_policies, related_policies = gen_policy_instance(vnf_list, zone_policy, match_type="all", rtype=None) + for p_new, p_main in zip(cur_policies, related_policies): # add additional fields to each policy + pmz = p_main['content']['affinityProperty'] + p_new[p_main['content']['identity']]['properties'] = {'category': pmz['category'], 'qualifier': pmz['qualifier']} + return cur_policies + + +def gen_capacity_policy(vnf_list, capacity_policy): + """Get zone policies in order to populate the Conductor API call""" + cur_policies, related_policies = gen_policy_instance(vnf_list, capacity_policy, rtype=None) + for p_new, p_main in zip(cur_policies, related_policies): # add additional fields to each policy + pmz = p_main['content']['capacityProperty'] + p_new[p_main['content']['identity']]['properties'] = \ + {"controller": pmz['controller'], 'request': json.loads(pmz['request'])} + return cur_policies + + +def gen_hpa_policy(vnf_list, hpa_policy): + """Get zone policies in order to populate the Conductor API call""" + cur_policies, related_policies = gen_policy_instance(vnf_list, hpa_policy, rtype=None) + for p_new, p_main in zip(cur_policies, related_policies): # add additional fields to each policy + p_new[p_main['content']['identity']]['properties'] = {'evaluate': p_main['content']['flavorFeatures']} + return cur_policies + + +def get_augmented_policy_attributes(policy_property, demand): + """Get policy attributes and augment them using policy_config_mapping and demand information""" + attributes = copy.copy(policy_property['attributes']) + remapping = policy_config_mapping['remapping'] + extra = dict((x, demand['resourceModelInfo'][remapping[x]]) for x in attributes if x in remapping) + attributes.update(extra) + return attributes + + +def get_candidates_demands(demand): + """Get demands related to candidates; e.g. excluded/required""" + res = {} + for k, v in policy_config_mapping['candidates'].items(): + if k not in demand: + continue + res[v] = [{'inventory_type': x['identifierType'], 'candidate_id': x['identifiers']} for x in demand[k]] + return res + + +def get_policy_properties(demand, policies): + """Get policy_properties for cases where there is a match with the demand""" + for policy in policies: + policy_demands = set([x.lower() for x in policy['content'].get('resources', [])]) + if demand['resourceModuleName'].lower() not in policy_demands: + continue # no match for this policy + for policy_property in policy['content']['vnfProperties']: + yield policy_property + + +def get_demand_properties(demand, policies): + """Get list demand properties objects (named tuples) from policy""" + demand_properties = [] + for policy_property in get_policy_properties(demand, policies): + prop = dict(inventory_provider=policy_property['inventoryProvider'], + inventory_type=policy_property['inventoryType'], + service_type=demand['serviceResourceId'], + service_resource_id=demand['serviceResourceId']) + + prop.update({'unique': policy_property['unique']} if 'unique' in policy_property and + policy_property['unique'] else {}) + prop['attributes'] = dict() + prop['attributes'].update({'global-customer-id': policy_property['customerId']} + if policy_property['customerId'] else {}) + prop['attributes'].update({'model-invariant-id': demand['resourceModelInfo']['modelInvariantId']} + if demand['resourceModelInfo']['modelInvariantId'] else {}) + prop['attributes'].update({'model-version-id': demand['resourceModelInfo']['modelVersionId']} + if demand['resourceModelInfo']['modelVersionId'] else {}) + prop['attributes'].update({'equipment-role': policy_property['equipmentRole']} + if policy_property['equipmentRole'] else {}) + + if policy_property.get('attributes'): + for attr_key, attr_val in policy_property['attributes'].items(): + update_converted_attribute(attr_key, attr_val, prop) + + prop.update(get_candidates_demands(demand)) + demand_properties.append(prop) + return demand_properties + + +def update_converted_attribute(attr_key, attr_val, properties): + """ + Updates dictonary of attributes with one specified in the arguments. + Automatically translates key namr from camelCase to hyphens + :param attr_key: key of the attribute + :param attr_val: value of the attribute + :param properties: dictionary with attributes to update + :return: + """ + if attr_val: + remapping = policy_config_mapping['attributes'] + if remapping.get(attr_key): + key_value = remapping.get(attr_key) + else: + key_value = re.sub('(.)([A-Z][a-z]+)', r'\1-\2', attr_key) + key_value = re.sub('([a-z0-9])([A-Z])', r'\1-\2', key_value).lower() + properties['attributes'].update({key_value: attr_val}) + + +def gen_demands(req_json, vnf_policies): + """Generate list of demands based on request and VNF policies + :param req_json: Request object from the client (e.g. MSO) + :param vnf_policies: Policies associated with demand resources (e.g. from grouped_policies['vnfPolicy']) + :return: list of demand parameters to populate the Conductor API call + """ + demand_dictionary = {} + for demand in req_json['placementInfo']['placementDemands']: + prop = get_demand_properties(demand, vnf_policies) + if len(prop) > 0: + demand_dictionary.update({demand['resourceModuleName']: prop}) + return demand_dictionary |