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# -*- coding: utf-8 -*- |
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# pylint: disable=no-member |
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# Copyright 2018 Whitestack, LLC |
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# ************************************************************* |
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# This file is part of OSM Monitoring module |
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# All Rights Reserved to Whitestack, LLC |
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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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# http://www.apache.org/licenses/LICENSE-2.0 |
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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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# For those usages not covered by the Apache License, Version 2.0 please |
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# contact: bdiaz@whitestack.com or glavado@whitestack.com |
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## |
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import datetime |
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import json |
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import logging |
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import operator |
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import functools |
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|
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from osm_policy_module.common.common_db_client import CommonDbClient |
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from osm_policy_module.common.lcm_client import LcmClient |
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from osm_policy_module.common.mon_client import MonClient |
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from osm_policy_module.core import database |
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from osm_policy_module.core.config import Config |
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from osm_policy_module.core.database import ( |
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ScalingGroup, |
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ScalingAlarm, |
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ScalingPolicy, |
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ScalingCriteria, |
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ScalingAlarmRepository, |
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ScalingGroupRepository, |
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ScalingPolicyRepository, |
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ScalingCriteriaRepository, |
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) |
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from osm_policy_module.core.exceptions import VdurNotFound |
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log = logging.getLogger(__name__) |
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class AutoscalingService: |
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def __init__(self, config: Config): |
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self.conf = config |
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self.db_client = CommonDbClient(config) |
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self.mon_client = MonClient(config) |
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self.lcm_client = LcmClient(config) |
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|
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async def configure_scaling_groups(self, nsr_id: str, vnf_member_index=None): |
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""" |
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Configures scaling groups for a network service. Creates records in DB. Creates alarms in MON. |
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:param nsr_id: Network service record id |
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:return: |
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""" |
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log.info( |
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"Configuring scaling groups for network service with nsr_id: %s", nsr_id |
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) |
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alarms_created = [] |
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database.db.connect() |
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try: |
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with database.db.atomic() as tx: |
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try: |
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if vnf_member_index is None: |
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vnfrs = self.db_client.get_vnfrs(nsr_id) |
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else: |
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vnfrs = [] |
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vnfr = self.db_client.get_vnfr(nsr_id, vnf_member_index) |
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vnfrs.append(vnfr) |
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# vnfrs = self.db_client.get_vnfrs(nsr_id) |
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for vnfr in vnfrs: |
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log.debug("Processing vnfr: %s", vnfr) |
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vnfd = self.db_client.get_vnfd(vnfr["vnfd-id"]) |
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# TODO: Change for multiple DF support |
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df = vnfd.get("df", [{}])[0] |
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if "scaling-aspect" not in df: |
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log.debug("No scaling aspect present in vnfd") |
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continue |
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# TODO: Change for multiple instantiation levels support |
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scaling_aspects = df["scaling-aspect"] |
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all_vnfd_monitoring_params = ( |
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self._get_all_vnfd_monitoring_params(vnfd) |
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) |
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for scaling_aspect in scaling_aspects: |
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scaling_group_record = self._get_or_create_scaling_group( |
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nsr_id, vnfr["member-vnf-index-ref"], scaling_aspect |
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) |
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vdurs = self._get_monitored_vdurs( |
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scaling_aspect, vnfr["vdur"] |
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) |
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for scaling_policy in scaling_aspect.get( |
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"scaling-policy", () |
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): |
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if scaling_policy["scaling-type"] != "automatic": |
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continue |
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scaling_policy_record = ( |
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self._get_or_create_scaling_policy( |
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nsr_id, scaling_policy, scaling_group_record |
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) |
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) |
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|
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for scaling_criteria in scaling_policy[ |
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"scaling-criteria" |
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]: |
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scaling_criteria_record = ( |
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self._get_or_create_scaling_criteria( |
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nsr_id, |
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scaling_criteria, |
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scaling_policy_record, |
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) |
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) |
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monitoring_param_ref = scaling_criteria.get( |
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"vnf-monitoring-param-ref" |
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) |
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vnf_monitoring_param = all_vnfd_monitoring_params[ |
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monitoring_param_ref |
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] |
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|
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for vdur in vdurs: |
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vdu_id = vdur["vdu-id-ref"] |
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log.debug("Creating alarm for vdur %s ", vdur) |
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try: |
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ScalingAlarmRepository.get( |
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ScalingAlarm.vdu_name == vdur["name"], |
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ScalingCriteria.name |
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== scaling_criteria["name"], |
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ScalingPolicy.name |
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== scaling_policy["name"], |
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ScalingGroup.nsr_id == nsr_id, |
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join_classes=[ |
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ScalingCriteria, |
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ScalingPolicy, |
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ScalingGroup, |
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], |
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) |
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log.debug( |
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"vdu %s already has an alarm configured", |
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vdur["name"], |
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) |
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continue |
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except ScalingAlarm.DoesNotExist: |
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pass |
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metric_name = self._get_metric_name( |
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vnf_monitoring_param |
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) |
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|
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db_nsr = self.db_client.get_nsr(nsr_id) |
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nb_scale_op = 0 |
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if db_nsr["_admin"].get("scaling-group"): |
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db_nsr_admin = db_nsr["_admin"][ |
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"scaling-group" |
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] |
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for ( |
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admin_scale_index, |
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admin_scale_info, |
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) in enumerate(db_nsr_admin): |
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if ( |
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admin_scale_info["name"] |
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== scaling_aspect["name"] |
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): |
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nb_scale_op = admin_scale_info.get( |
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"nb-scale-op", 0 |
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) |
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break |
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min_instance_count = 1 |
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for vdu_profile in df.get("vdu-profile", ()): |
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if vdu_profile.get("id") == vdu_id: |
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min_instance_count = int( |
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vdu_profile.get( |
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"min-number-of-instances ", 1 |
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) |
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) |
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break |
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if nb_scale_op >= min_instance_count: |
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alarm_uuid = ( |
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await self.mon_client.create_alarm( |
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metric_name=metric_name, |
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ns_id=nsr_id, |
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vdu_name=vdur["name"], |
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vnf_member_index=vnfr[ |
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"member-vnf-index-ref" |
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], |
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threshold=scaling_criteria[ |
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"scale-in-threshold" |
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], |
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operation=scaling_criteria[ |
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"scale-in-relational-operation" |
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], |
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action="scale_in", |
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) |
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) |
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alarm = ScalingAlarmRepository.create( |
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alarm_uuid=alarm_uuid, |
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action="scale_in", |
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vnf_member_index=vnfr[ |
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"member-vnf-index-ref" |
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], |
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vdu_name=vdur["name"], |
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scaling_criteria=scaling_criteria_record, |
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) |
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alarms_created.append(alarm) |
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alarm_uuid = await self.mon_client.create_alarm( |
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metric_name=metric_name, |
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ns_id=nsr_id, |
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vdu_name=vdur["name"], |
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vnf_member_index=vnfr[ |
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"member-vnf-index-ref" |
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], |
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threshold=scaling_criteria[ |
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"scale-out-threshold" |
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], |
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operation=scaling_criteria[ |
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"scale-out-relational-operation" |
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], |
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action="scale_out", |
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) |
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alarm = ScalingAlarmRepository.create( |
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alarm_uuid=alarm_uuid, |
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action="scale_out", |
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vnf_member_index=vnfr[ |
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"member-vnf-index-ref" |
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], |
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vdu_name=vdur["name"], |
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scaling_criteria=scaling_criteria_record, |
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) |
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alarms_created.append(alarm) |
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|
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except Exception as e: |
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log.exception("Error configuring scaling groups:") |
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tx.rollback() |
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if len(alarms_created) > 0: |
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log.info("Cleaning alarm resources in MON") |
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for alarm in alarms_created: |
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await self.mon_client.delete_alarm( |
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alarm.scaling_criteria.scaling_policy.scaling_group.nsr_id, |
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alarm.vnf_member_index, |
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alarm.vdu_name, |
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alarm.alarm_uuid, |
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) |
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raise e |
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finally: |
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database.db.close() |
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|
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async def delete_scaling_groups(self, nsr_id: str, vnf_member_index=None): |
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log.debug("Deleting scaling groups for network service %s", nsr_id) |
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database.db.connect() |
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try: |
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with database.db.atomic() as tx: |
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try: |
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if vnf_member_index is None: |
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scale_conditions = ScalingGroup.nsr_id == nsr_id |
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else: |
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query_list = [ |
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ScalingGroup.nsr_id == nsr_id, |
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ScalingGroup.vnf_member_index == vnf_member_index, |
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] |
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scale_conditions = functools.reduce(operator.and_, query_list) |
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for scaling_group in ScalingGroupRepository.list(scale_conditions): |
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for scaling_policy in scaling_group.scaling_policies: |
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for scaling_criteria in scaling_policy.scaling_criterias: |
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for alarm in scaling_criteria.scaling_alarms: |
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try: |
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await self.mon_client.delete_alarm( |
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alarm.scaling_criteria.scaling_policy.scaling_group.nsr_id, |
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alarm.vnf_member_index, |
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alarm.vdu_name, |
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alarm.alarm_uuid, |
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) |
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except ValueError: |
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log.exception( |
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"Error deleting alarm in MON %s", |
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alarm.alarm_uuid, |
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) |
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alarm.delete_instance() |
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scaling_criteria.delete_instance() |
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scaling_policy.delete_instance() |
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scaling_group.delete_instance() |
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|
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except Exception as e: |
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log.exception("Error deleting scaling groups and alarms:") |
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tx.rollback() |
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raise e |
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finally: |
| 292 |
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database.db.close() |
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|
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async def delete_orphaned_alarms(self, nsr_id): |
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log.info("Deleting orphaned scaling alarms for network service %s", nsr_id) |
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0 |
database.db.connect() |
| 297 |
0 |
try: |
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0 |
with database.db.atomic() as tx: |
| 299 |
0 |
try: |
| 300 |
0 |
for scaling_group in ScalingGroupRepository.list( |
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ScalingGroup.nsr_id == nsr_id |
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): |
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0 |
for scaling_policy in scaling_group.scaling_policies: |
| 304 |
0 |
for scaling_criteria in scaling_policy.scaling_criterias: |
| 305 |
0 |
for alarm in scaling_criteria.scaling_alarms: |
| 306 |
0 |
try: |
| 307 |
0 |
self.db_client.get_vdur( |
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nsr_id, |
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alarm.vnf_member_index, |
| 310 |
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alarm.vdu_name, |
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) |
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0 |
except VdurNotFound: |
| 313 |
0 |
log.debug( |
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"Deleting orphaned scaling alarm %s", |
| 315 |
|
alarm.alarm_uuid, |
| 316 |
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) |
| 317 |
0 |
try: |
| 318 |
0 |
await self.mon_client.delete_alarm( |
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alarm.scaling_criteria.scaling_policy.scaling_group.nsr_id, |
| 320 |
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alarm.vnf_member_index, |
| 321 |
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alarm.vdu_name, |
| 322 |
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alarm.alarm_uuid, |
| 323 |
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) |
| 324 |
0 |
except ValueError: |
| 325 |
0 |
log.exception( |
| 326 |
|
"Error deleting alarm in MON %s", |
| 327 |
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alarm.alarm_uuid, |
| 328 |
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) |
| 329 |
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alarm.delete_instance() |
| 330 |
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|
| 331 |
0 |
except Exception as e: |
| 332 |
0 |
log.exception("Error deleting orphaned alarms:") |
| 333 |
0 |
tx.rollback() |
| 334 |
0 |
raise e |
| 335 |
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finally: |
| 336 |
0 |
database.db.close() |
| 337 |
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|
| 338 |
1 |
async def handle_alarm(self, alarm_uuid: str, status: str): |
| 339 |
0 |
await self.update_alarm_status(alarm_uuid, status) |
| 340 |
0 |
await self.evaluate_policy(alarm_uuid) |
| 341 |
|
|
| 342 |
1 |
async def update_alarm_status(self, alarm_uuid: str, status: str): |
| 343 |
1 |
database.db.connect() |
| 344 |
1 |
try: |
| 345 |
1 |
with database.db.atomic(): |
| 346 |
1 |
alarm = ScalingAlarmRepository.get( |
| 347 |
|
ScalingAlarm.alarm_uuid == alarm_uuid |
| 348 |
|
) |
| 349 |
1 |
alarm.last_status = status |
| 350 |
1 |
alarm.save() |
| 351 |
0 |
except ScalingAlarm.DoesNotExist: |
| 352 |
0 |
log.debug( |
| 353 |
|
"There is no autoscaling action configured for alarm %s.", alarm_uuid |
| 354 |
|
) |
| 355 |
|
finally: |
| 356 |
1 |
database.db.close() |
| 357 |
|
|
| 358 |
1 |
async def evaluate_policy(self, alarm_uuid): |
| 359 |
1 |
database.db.connect() |
| 360 |
1 |
try: |
| 361 |
1 |
with database.db.atomic(): |
| 362 |
1 |
alarm = ScalingAlarmRepository.get( |
| 363 |
|
ScalingAlarm.alarm_uuid == alarm_uuid |
| 364 |
|
) |
| 365 |
1 |
vnf_member_index = alarm.vnf_member_index |
| 366 |
1 |
action = alarm.action |
| 367 |
1 |
scaling_policy = alarm.scaling_criteria.scaling_policy |
| 368 |
1 |
if not scaling_policy.enabled: |
| 369 |
1 |
return |
| 370 |
1 |
if action == "scale_in": |
| 371 |
1 |
operation = scaling_policy.scale_in_operation |
| 372 |
1 |
elif action == "scale_out": |
| 373 |
1 |
operation = scaling_policy.scale_out_operation |
| 374 |
|
else: |
| 375 |
0 |
raise Exception("Unknown alarm action {}".format(alarm.action)) |
| 376 |
1 |
alarms = ScalingAlarmRepository.list( |
| 377 |
|
ScalingAlarm.scaling_criteria == alarm.scaling_criteria, |
| 378 |
|
ScalingAlarm.action == alarm.action, |
| 379 |
|
ScalingAlarm.vnf_member_index == vnf_member_index, |
| 380 |
|
ScalingAlarm.vdu_name == alarm.vdu_name, |
| 381 |
|
) |
| 382 |
1 |
statuses = [] |
| 383 |
1 |
for alarm in alarms: |
| 384 |
1 |
statuses.append(alarm.last_status) |
| 385 |
1 |
if (operation == "AND" and set(statuses) == {"alarm"}) or ( |
| 386 |
|
operation == "OR" and "alarm" in statuses |
| 387 |
|
): |
| 388 |
1 |
delta = datetime.datetime.now() - scaling_policy.last_scale |
| 389 |
1 |
if delta.total_seconds() > scaling_policy.cooldown_time: |
| 390 |
1 |
log.info( |
| 391 |
|
"Sending %s action message for ns: %s", |
| 392 |
|
alarm.action, |
| 393 |
|
scaling_policy.scaling_group.nsr_id, |
| 394 |
|
) |
| 395 |
1 |
await self.lcm_client.scale( |
| 396 |
|
scaling_policy.scaling_group.nsr_id, |
| 397 |
|
scaling_policy.scaling_group.name, |
| 398 |
|
vnf_member_index, |
| 399 |
|
action, |
| 400 |
|
) |
| 401 |
1 |
scaling_policy.last_scale = datetime.datetime.now() |
| 402 |
1 |
scaling_policy.save() |
| 403 |
|
|
| 404 |
0 |
except ScalingAlarm.DoesNotExist: |
| 405 |
0 |
log.debug( |
| 406 |
|
"There is no autoscaling action configured for alarm %s.", alarm_uuid |
| 407 |
|
) |
| 408 |
|
finally: |
| 409 |
1 |
database.db.close() |
| 410 |
|
|
| 411 |
1 |
def _get_all_vnfd_monitoring_params(self, vnfd): |
| 412 |
1 |
all_monitoring_params = {} |
| 413 |
1 |
for ivld in vnfd.get("int-virtual-link-desc", ()): |
| 414 |
0 |
for mp in ivld.get("monitoring-parameters", ()): |
| 415 |
0 |
all_monitoring_params[mp.get("id")] = mp |
| 416 |
|
|
| 417 |
1 |
for vdu in vnfd.get("vdu", ()): |
| 418 |
1 |
for mp in vdu.get("monitoring-parameter", ()): |
| 419 |
1 |
all_monitoring_params[mp.get("id")] = mp |
| 420 |
|
|
| 421 |
1 |
for df in vnfd.get("df", ()): |
| 422 |
1 |
for mp in df.get("monitoring-parameter", ()): |
| 423 |
0 |
all_monitoring_params[mp.get("id")] = mp |
| 424 |
|
|
| 425 |
1 |
return all_monitoring_params |
| 426 |
|
|
| 427 |
1 |
def _get_or_create_scaling_group( |
| 428 |
|
self, nsr_id: str, vnf_member_index: str, scaling_aspect: dict |
| 429 |
|
): |
| 430 |
1 |
try: |
| 431 |
1 |
scaling_group_record = ScalingGroupRepository.get( |
| 432 |
|
ScalingGroup.nsr_id == nsr_id, |
| 433 |
|
ScalingGroup.vnf_member_index == vnf_member_index, |
| 434 |
|
ScalingGroup.name == scaling_aspect["name"], |
| 435 |
|
) |
| 436 |
0 |
log.debug("Found existing scaling group record in DB...") |
| 437 |
1 |
except ScalingGroup.DoesNotExist: |
| 438 |
1 |
log.debug("Creating scaling group record in DB...") |
| 439 |
1 |
scaling_group_record = ScalingGroupRepository.create( |
| 440 |
|
nsr_id=nsr_id, |
| 441 |
|
vnf_member_index=vnf_member_index, |
| 442 |
|
name=scaling_aspect["name"], |
| 443 |
|
content=json.dumps(scaling_aspect), |
| 444 |
|
) |
| 445 |
1 |
log.debug( |
| 446 |
|
"Created scaling group record in DB : nsr_id=%s, vnf_member_index=%s, name=%s", |
| 447 |
|
scaling_group_record.nsr_id, |
| 448 |
|
scaling_group_record.vnf_member_index, |
| 449 |
|
scaling_group_record.name, |
| 450 |
|
) |
| 451 |
1 |
return scaling_group_record |
| 452 |
|
|
| 453 |
1 |
def _get_or_create_scaling_policy( |
| 454 |
|
self, nsr_id: str, scaling_policy: dict, scaling_group_record: ScalingGroup |
| 455 |
|
): |
| 456 |
1 |
try: |
| 457 |
1 |
scaling_policy_record = ScalingPolicyRepository.get( |
| 458 |
|
ScalingPolicy.name == scaling_policy["name"], |
| 459 |
|
ScalingGroup.id == scaling_group_record.id, |
| 460 |
|
join_classes=[ScalingGroup], |
| 461 |
|
) |
| 462 |
0 |
log.debug("Found existing scaling policy record in DB...") |
| 463 |
1 |
except ScalingPolicy.DoesNotExist: |
| 464 |
1 |
log.debug("Creating scaling policy record in DB...") |
| 465 |
1 |
scaling_policy_record = ScalingPolicyRepository.create( |
| 466 |
|
nsr_id=nsr_id, |
| 467 |
|
name=scaling_policy["name"], |
| 468 |
|
cooldown_time=scaling_policy["cooldown-time"], |
| 469 |
|
scaling_group=scaling_group_record, |
| 470 |
|
) |
| 471 |
1 |
if "scale-in-operation-type" in scaling_policy: |
| 472 |
0 |
scaling_policy_record.scale_in_operation = scaling_policy[ |
| 473 |
|
"scale-in-operation-type" |
| 474 |
|
] |
| 475 |
1 |
if "scale-out-operation-type" in scaling_policy: |
| 476 |
0 |
scaling_policy_record.scale_out_operation = scaling_policy[ |
| 477 |
|
"scale-out-operation-type" |
| 478 |
|
] |
| 479 |
1 |
if "enabled" in scaling_policy: |
| 480 |
0 |
scaling_policy_record.enabled = scaling_policy["enabled"] |
| 481 |
1 |
scaling_policy_record.save() |
| 482 |
1 |
log.debug( |
| 483 |
|
"Created scaling policy record in DB : name=%s, scaling_group.name=%s", |
| 484 |
|
scaling_policy_record.name, |
| 485 |
|
scaling_policy_record.scaling_group.name, |
| 486 |
|
) |
| 487 |
1 |
return scaling_policy_record |
| 488 |
|
|
| 489 |
1 |
def _get_or_create_scaling_criteria( |
| 490 |
|
self, nsr_id: str, scaling_criteria: dict, scaling_policy_record: ScalingPolicy |
| 491 |
|
): |
| 492 |
1 |
try: |
| 493 |
1 |
scaling_criteria_record = ScalingCriteriaRepository.get( |
| 494 |
|
ScalingPolicy.id == scaling_policy_record.id, |
| 495 |
|
ScalingCriteria.name == scaling_criteria["name"], |
| 496 |
|
join_classes=[ScalingPolicy], |
| 497 |
|
) |
| 498 |
0 |
log.debug("Found existing scaling criteria record in DB...") |
| 499 |
1 |
except ScalingCriteria.DoesNotExist: |
| 500 |
1 |
log.debug("Creating scaling criteria record in DB...") |
| 501 |
1 |
scaling_criteria_record = ScalingCriteriaRepository.create( |
| 502 |
|
nsr_id=nsr_id, |
| 503 |
|
name=scaling_criteria["name"], |
| 504 |
|
scaling_policy=scaling_policy_record, |
| 505 |
|
) |
| 506 |
1 |
log.debug( |
| 507 |
|
"Created scaling criteria record in DB : name=%s, scaling_policy.name=%s", |
| 508 |
|
scaling_criteria_record.name, |
| 509 |
|
scaling_criteria_record.scaling_policy.name, |
| 510 |
|
) |
| 511 |
1 |
return scaling_criteria_record |
| 512 |
|
|
| 513 |
1 |
def _get_monitored_vdurs(self, scaling_aspect: dict, vdurs): |
| 514 |
1 |
all_monitored_vdus = set() |
| 515 |
1 |
for delta in scaling_aspect.get("aspect-delta-details", {}).get("deltas", ()): |
| 516 |
1 |
for vdu_delta in delta.get("vdu-delta", ()): |
| 517 |
1 |
all_monitored_vdus.add(vdu_delta.get("id")) |
| 518 |
|
|
| 519 |
1 |
monitored_vdurs = list( |
| 520 |
|
filter(lambda vdur: vdur["vdu-id-ref"] in all_monitored_vdus, vdurs) |
| 521 |
|
) |
| 522 |
|
|
| 523 |
1 |
if not monitored_vdurs: |
| 524 |
0 |
log.warning( |
| 525 |
|
"Scaling criteria is referring to a vnf-monitoring-param that does not " |
| 526 |
|
"contain a reference to a vdu or vnf metric." |
| 527 |
|
) |
| 528 |
1 |
return monitored_vdurs |
| 529 |
|
|
| 530 |
1 |
def _get_metric_name(self, vnf_monitoring_param: dict): |
| 531 |
1 |
if "performance-metric" in vnf_monitoring_param: |
| 532 |
1 |
return vnf_monitoring_param["performance-metric"] |
| 533 |
0 |
raise ValueError( |
| 534 |
|
"No metric name found for vnf_monitoring_param %s" |
| 535 |
|
% vnf_monitoring_param["id"] |
| 536 |
|
) |
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