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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 asyncio |
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import datetime |
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import json |
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import logging |
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from typing import List |
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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 ScalingGroup, ScalingAlarm, ScalingPolicy, ScalingCriteria, \ |
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ScalingAlarmRepository, ScalingGroupRepository, ScalingPolicyRepository, ScalingCriteriaRepository |
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from osm_policy_module.core.exceptions import VdurNotFound |
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from osm_policy_module.utils.vnfd import VnfdUtils |
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log = logging.getLogger(__name__) |
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class AutoscalingService: |
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def __init__(self, config: Config, loop=None): |
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self.conf = config |
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if not loop: |
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loop = asyncio.get_event_loop() |
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self.loop = loop |
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self.db_client = CommonDbClient(config) |
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self.mon_client = MonClient(config, loop=self.loop) |
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self.lcm_client = LcmClient(config, loop=self.loop) |
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async def configure_scaling_groups(self, nsr_id: str): |
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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("Configuring scaling groups for network service with nsr_id: %s", |
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nsr_id) |
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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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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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if 'scaling-group-descriptor' not in vnfd: |
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log.debug("No scaling group present in vnfd") |
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continue |
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scaling_groups = vnfd['scaling-group-descriptor'] |
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vnf_monitoring_params = vnfd['monitoring-param'] |
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for scaling_group in scaling_groups: |
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scaling_group_record = self._get_or_create_scaling_group(nsr_id, |
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vnfr['member-vnf-index-ref'], |
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scaling_group) |
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for scaling_policy in scaling_group['scaling-policy']: |
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if scaling_policy['scaling-type'] != 'automatic': |
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continue |
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scaling_policy_record = self._get_or_create_scaling_policy(nsr_id, |
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scaling_policy, |
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scaling_group_record) |
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for scaling_criteria in scaling_policy['scaling-criteria']: |
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scaling_criteria_record = 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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vnf_monitoring_param = next( |
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filter( |
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lambda param: param['id'] == scaling_criteria[ |
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'vnf-monitoring-param-ref' |
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], |
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vnf_monitoring_params) |
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) |
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vdurs = self._get_monitored_vdurs(vnf_monitoring_param, vnfr['vdur'], vnfd) |
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for vdur in vdurs: |
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log.debug("Creating alarm for vdur %s ", vdur) |
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try: |
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ScalingAlarmRepository.get(ScalingAlarm.vdu_name == vdur['name'], |
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ScalingCriteria.name == scaling_criteria['name'], |
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ScalingPolicy.name == scaling_policy['name'], |
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ScalingGroup.nsr_id == nsr_id, |
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join_classes=[ScalingCriteria, |
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ScalingPolicy, |
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ScalingGroup]) |
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log.debug("vdu %s already has an alarm configured", vdur['name']) |
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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(vnf_monitoring_param, vdur, vnfd) |
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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"]["scaling-group"] |
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for admin_scale_index, admin_scale_info in enumerate(db_nsr_admin): |
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if admin_scale_info["name"] == scaling_group["name"]: |
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nb_scale_op = admin_scale_info.get("nb-scale-op", 0) |
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break |
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min_instance_count = int(scaling_group["min-instance-count"]) |
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if nb_scale_op > min_instance_count: |
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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['member-vnf-index-ref'], |
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threshold=scaling_criteria['scale-in-threshold'], |
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operation=scaling_criteria['scale-in-relational-operation'], |
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statistic=vnf_monitoring_param['aggregation-type'] |
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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['member-vnf-index-ref'], |
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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['member-vnf-index-ref'], |
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threshold=scaling_criteria['scale-out-threshold'], |
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operation=scaling_criteria['scale-out-relational-operation'], |
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statistic=vnf_monitoring_param['aggregation-type'] |
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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['member-vnf-index-ref'], |
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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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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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raise e |
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finally: |
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database.db.close() |
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async def delete_scaling_groups(self, nsr_id: str): |
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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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for scaling_group in ScalingGroupRepository.list(ScalingGroup.nsr_id == nsr_id): |
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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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except ValueError: |
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log.exception("Error deleting alarm in MON %s", alarm.alarm_uuid) |
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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: |
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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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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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for scaling_group in ScalingGroupRepository.list(ScalingGroup.nsr_id == nsr_id): |
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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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self.db_client.get_vdur(nsr_id, alarm.vnf_member_index, alarm.vdu_name) |
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except VdurNotFound: |
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log.debug("Deleting orphaned scaling alarm %s", alarm.alarm_uuid) |
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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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except ValueError: |
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log.exception("Error deleting alarm in MON %s", alarm.alarm_uuid) |
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alarm.delete_instance() |
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|
| 232 |
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except Exception as e: |
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log.exception("Error deleting orphaned alarms:") |
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tx.rollback() |
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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 handle_alarm(self, alarm_uuid: str, status: str): |
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await self.update_alarm_status(alarm_uuid, status) |
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await self.evaluate_policy(alarm_uuid) |
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|
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async def update_alarm_status(self, alarm_uuid: str, status: str): |
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database.db.connect() |
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try: |
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with database.db.atomic(): |
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alarm = ScalingAlarmRepository.get(ScalingAlarm.alarm_uuid == alarm_uuid) |
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alarm.last_status = status |
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alarm.save() |
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except ScalingAlarm.DoesNotExist: |
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log.debug("There is no autoscaling action configured for alarm %s.", alarm_uuid) |
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finally: |
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database.db.close() |
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|
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async def evaluate_policy(self, alarm_uuid): |
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database.db.connect() |
| 257 |
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try: |
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with database.db.atomic(): |
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alarm = ScalingAlarmRepository.get(ScalingAlarm.alarm_uuid == alarm_uuid) |
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vnf_member_index = alarm.vnf_member_index |
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action = alarm.action |
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scaling_policy = alarm.scaling_criteria.scaling_policy |
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if not scaling_policy.enabled: |
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return |
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if action == 'scale_in': |
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operation = scaling_policy.scale_in_operation |
| 267 |
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elif action == 'scale_out': |
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operation = scaling_policy.scale_out_operation |
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else: |
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raise Exception('Unknown alarm action {}'.format(alarm.action)) |
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alarms = ScalingAlarmRepository.list(ScalingAlarm.scaling_criteria == alarm.scaling_criteria, |
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ScalingAlarm.action == alarm.action, |
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ScalingAlarm.vnf_member_index == vnf_member_index, |
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ScalingAlarm.vdu_name == alarm.vdu_name) |
| 275 |
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statuses = [] |
| 276 |
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for alarm in alarms: |
| 277 |
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statuses.append(alarm.last_status) |
| 278 |
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if (operation == 'AND' and set(statuses) == {'alarm'}) or (operation == 'OR' and 'alarm' in statuses): |
| 279 |
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delta = datetime.datetime.now() - scaling_policy.last_scale |
| 280 |
1 |
if delta.total_seconds() > scaling_policy.cooldown_time: |
| 281 |
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log.info("Sending %s action message for ns: %s", |
| 282 |
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alarm.action, |
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scaling_policy.scaling_group.nsr_id) |
| 284 |
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await self.lcm_client.scale(scaling_policy.scaling_group.nsr_id, |
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scaling_policy.scaling_group.name, |
| 286 |
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vnf_member_index, |
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action) |
| 288 |
1 |
scaling_policy.last_scale = datetime.datetime.now() |
| 289 |
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scaling_policy.save() |
| 290 |
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|
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except ScalingAlarm.DoesNotExist: |
| 292 |
0 |
log.debug("There is no autoscaling action configured for alarm %s.", alarm_uuid) |
| 293 |
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finally: |
| 294 |
1 |
database.db.close() |
| 295 |
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|
| 296 |
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def _get_or_create_scaling_group(self, nsr_id: str, vnf_member_index: str, scaling_group: dict): |
| 297 |
1 |
try: |
| 298 |
1 |
scaling_group_record = ScalingGroupRepository.get( |
| 299 |
|
ScalingGroup.nsr_id == nsr_id, |
| 300 |
|
ScalingGroup.vnf_member_index == vnf_member_index, |
| 301 |
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ScalingGroup.name == scaling_group['name'] |
| 302 |
|
) |
| 303 |
0 |
log.debug("Found existing scaling group record in DB...") |
| 304 |
1 |
except ScalingGroup.DoesNotExist: |
| 305 |
1 |
log.debug("Creating scaling group record in DB...") |
| 306 |
1 |
scaling_group_record = ScalingGroupRepository.create( |
| 307 |
|
nsr_id=nsr_id, |
| 308 |
|
vnf_member_index=vnf_member_index, |
| 309 |
|
name=scaling_group['name'], |
| 310 |
|
content=json.dumps(scaling_group) |
| 311 |
|
) |
| 312 |
1 |
log.debug( |
| 313 |
|
"Created scaling group record in DB : nsr_id=%s, vnf_member_index=%s, name=%s", |
| 314 |
|
scaling_group_record.nsr_id, |
| 315 |
|
scaling_group_record.vnf_member_index, |
| 316 |
|
scaling_group_record.name) |
| 317 |
1 |
return scaling_group_record |
| 318 |
|
|
| 319 |
1 |
def _get_or_create_scaling_policy(self, nsr_id: str, scaling_policy: dict, scaling_group_record: ScalingGroup): |
| 320 |
1 |
try: |
| 321 |
1 |
scaling_policy_record = ScalingPolicyRepository.get( |
| 322 |
|
ScalingPolicy.name == scaling_policy['name'], |
| 323 |
|
ScalingGroup.id == scaling_group_record.id, |
| 324 |
|
join_classes=[ScalingGroup] |
| 325 |
|
) |
| 326 |
0 |
log.debug("Found existing scaling policy record in DB...") |
| 327 |
1 |
except ScalingPolicy.DoesNotExist: |
| 328 |
1 |
log.debug("Creating scaling policy record in DB...") |
| 329 |
1 |
scaling_policy_record = ScalingPolicyRepository.create( |
| 330 |
|
nsr_id=nsr_id, |
| 331 |
|
name=scaling_policy['name'], |
| 332 |
|
cooldown_time=scaling_policy['cooldown-time'], |
| 333 |
|
scaling_group=scaling_group_record, |
| 334 |
|
) |
| 335 |
1 |
if 'scale-in-operation-type' in scaling_policy: |
| 336 |
0 |
scaling_policy_record.scale_in_operation = scaling_policy[ |
| 337 |
|
'scale-in-operation-type'] |
| 338 |
1 |
if 'scale-out-operation-type' in scaling_policy: |
| 339 |
0 |
scaling_policy_record.scale_out_operation = scaling_policy[ |
| 340 |
|
'scale-out-operation-type'] |
| 341 |
1 |
if 'enabled' in scaling_policy: |
| 342 |
0 |
scaling_policy_record.enabled = scaling_policy['enabled'] |
| 343 |
1 |
scaling_policy_record.save() |
| 344 |
1 |
log.debug("Created scaling policy record in DB : name=%s, scaling_group.name=%s", |
| 345 |
|
scaling_policy_record.name, |
| 346 |
|
scaling_policy_record.scaling_group.name) |
| 347 |
1 |
return scaling_policy_record |
| 348 |
|
|
| 349 |
1 |
def _get_or_create_scaling_criteria(self, nsr_id: str, scaling_criteria: dict, |
| 350 |
|
scaling_policy_record: ScalingPolicy): |
| 351 |
1 |
try: |
| 352 |
1 |
scaling_criteria_record = ScalingCriteriaRepository.get( |
| 353 |
|
ScalingPolicy.id == scaling_policy_record.id, |
| 354 |
|
ScalingCriteria.name == scaling_criteria['name'], |
| 355 |
|
join_classes=[ScalingPolicy] |
| 356 |
|
) |
| 357 |
0 |
log.debug("Found existing scaling criteria record in DB...") |
| 358 |
1 |
except ScalingCriteria.DoesNotExist: |
| 359 |
1 |
log.debug("Creating scaling criteria record in DB...") |
| 360 |
1 |
scaling_criteria_record = ScalingCriteriaRepository.create( |
| 361 |
|
nsr_id=nsr_id, |
| 362 |
|
name=scaling_criteria['name'], |
| 363 |
|
scaling_policy=scaling_policy_record |
| 364 |
|
) |
| 365 |
1 |
log.debug( |
| 366 |
|
"Created scaling criteria record in DB : name=%s, scaling_policy.name=%s", |
| 367 |
|
scaling_criteria_record.name, |
| 368 |
|
scaling_criteria_record.scaling_policy.name) |
| 369 |
1 |
return scaling_criteria_record |
| 370 |
|
|
| 371 |
1 |
def _get_monitored_vdurs(self, vnf_monitoring_param: dict, vdurs: List[dict], vnfd: dict): |
| 372 |
1 |
monitored_vdurs = [] |
| 373 |
1 |
if 'vdu-monitoring-param' in vnf_monitoring_param: |
| 374 |
1 |
monitored_vdurs = list( |
| 375 |
|
filter( |
| 376 |
|
lambda vdur: vdur['vdu-id-ref'] == vnf_monitoring_param |
| 377 |
|
['vdu-monitoring-param'] |
| 378 |
|
['vdu-ref'], |
| 379 |
|
vdurs |
| 380 |
|
) |
| 381 |
|
) |
| 382 |
0 |
elif 'vdu-metric' in vnf_monitoring_param: |
| 383 |
0 |
monitored_vdurs = list( |
| 384 |
|
filter( |
| 385 |
|
lambda vdur: vdur['vdu-id-ref'] == vnf_monitoring_param |
| 386 |
|
['vdu-metric'] |
| 387 |
|
['vdu-ref'], |
| 388 |
|
vdurs |
| 389 |
|
) |
| 390 |
|
) |
| 391 |
0 |
elif 'vnf-metric' in vnf_monitoring_param: |
| 392 |
0 |
vdu = VnfdUtils.get_mgmt_vdu(vnfd) |
| 393 |
0 |
monitored_vdurs = list( |
| 394 |
|
filter( |
| 395 |
|
lambda vdur: vdur['vdu-id-ref'] == vdu['id'], |
| 396 |
|
vdurs |
| 397 |
|
) |
| 398 |
|
) |
| 399 |
|
else: |
| 400 |
0 |
log.warning( |
| 401 |
|
"Scaling criteria is referring to a vnf-monitoring-param that does not " |
| 402 |
|
"contain a reference to a vdu or vnf metric.") |
| 403 |
1 |
return monitored_vdurs |
| 404 |
|
|
| 405 |
1 |
def _get_metric_name(self, vnf_monitoring_param: dict, vdur: dict, vnfd: dict): |
| 406 |
1 |
vdu = next( |
| 407 |
|
filter(lambda vdu: vdu['id'] == vdur['vdu-id-ref'], vnfd['vdu']) |
| 408 |
|
) |
| 409 |
1 |
if 'vdu-monitoring-param' in vnf_monitoring_param: |
| 410 |
1 |
vdu_monitoring_param = next(filter( |
| 411 |
|
lambda param: param['id'] == vnf_monitoring_param['vdu-monitoring-param'][ |
| 412 |
|
'vdu-monitoring-param-ref'], vdu['monitoring-param'])) |
| 413 |
1 |
nfvi_metric = vdu_monitoring_param['nfvi-metric'] |
| 414 |
1 |
return nfvi_metric |
| 415 |
0 |
if 'vdu-metric' in vnf_monitoring_param: |
| 416 |
0 |
vnf_metric_name = vnf_monitoring_param['vdu-metric']['vdu-metric-name-ref'] |
| 417 |
0 |
return vnf_metric_name |
| 418 |
0 |
if 'vnf-metric' in vnf_monitoring_param: |
| 419 |
0 |
vnf_metric_name = vnf_monitoring_param['vnf-metric']['vnf-metric-name-ref'] |
| 420 |
0 |
return vnf_metric_name |
| 421 |
0 |
raise ValueError('No metric name found for vnf_monitoring_param %s' % vnf_monitoring_param['id']) |
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