+ try:
+ with database.db.atomic():
+ alarm = ScalingAlarmRepository.get(ScalingAlarm.alarm_uuid == alarm_uuid)
+ alarm.last_status = status
+ alarm.save()
+ except ScalingAlarm.DoesNotExist:
+ log.debug("There is no autoscaling action configured for alarm %s.", alarm_uuid)
+ finally:
+ database.db.close()
+
+ async def evaluate_policy(self, alarm_uuid):
+ database.db.connect()
+ try:
+ with database.db.atomic():
+ alarm = ScalingAlarmRepository.get(ScalingAlarm.alarm_uuid == alarm_uuid)
+ vnf_member_index = alarm.vnf_member_index
+ action = alarm.action
+ scaling_policy = alarm.scaling_criteria.scaling_policy
+ if not scaling_policy.enabled:
+ return
+ if action == 'scale_in':
+ operation = scaling_policy.scale_in_operation
+ elif action == 'scale_out':
+ operation = scaling_policy.scale_out_operation
+ else:
+ raise Exception('Unknown alarm action {}'.format(alarm.action))
+ alarms = ScalingAlarmRepository.list(ScalingAlarm.scaling_criteria == alarm.scaling_criteria,
+ ScalingAlarm.action == alarm.action,
+ ScalingAlarm.vnf_member_index == vnf_member_index,
+ ScalingAlarm.vdu_name == alarm.vdu_name)
+ statuses = []
+ for alarm in alarms:
+ statuses.append(alarm.last_status)
+ if (operation == 'AND' and set(statuses) == {'alarm'}) or (operation == 'OR' and 'alarm' in statuses):
+ delta = datetime.datetime.now() - scaling_policy.last_scale
+ if delta.total_seconds() > scaling_policy.cooldown_time:
+ log.info("Sending %s action message for ns: %s",
+ alarm.action,
+ scaling_policy.scaling_group.nsr_id)
+ await self.lcm_client.scale(scaling_policy.scaling_group.nsr_id,
+ scaling_policy.scaling_group.name,
+ vnf_member_index,
+ action)
+ scaling_policy.last_scale = datetime.datetime.now()
+ scaling_policy.save()
+
+ except ScalingAlarm.DoesNotExist:
+ log.debug("There is no autoscaling action configured for alarm %s.", alarm_uuid)
+ finally:
+ database.db.close()
+
+ def _get_all_vnfd_monitoring_params(self, vnfd):
+ all_monitoring_params = {}
+ for ivld in vnfd.get("int-virtual-link-desc", ()):
+ for mp in ivld.get("monitoring-parameters", ()):
+ all_monitoring_params[mp.get("id")] = mp
+
+ for vdu in vnfd.get("vdu", ()):
+ for mp in vdu.get("monitoring-parameter", ()):
+ all_monitoring_params[mp.get("id")] = mp
+
+ for df in vnfd.get("df", ()):
+ for mp in df.get("monitoring-parameter", ()):
+ all_monitoring_params[mp.get("id")] = mp
+
+ return all_monitoring_params
+
+ def _get_or_create_scaling_group(self, nsr_id: str, vnf_member_index: str, scaling_aspect: dict):
+ try:
+ scaling_group_record = ScalingGroupRepository.get(
+ ScalingGroup.nsr_id == nsr_id,
+ ScalingGroup.vnf_member_index == vnf_member_index,
+ ScalingGroup.name == scaling_aspect['name']
+ )
+ log.debug("Found existing scaling group record in DB...")
+ except ScalingGroup.DoesNotExist:
+ log.debug("Creating scaling group record in DB...")
+ scaling_group_record = ScalingGroupRepository.create(
+ nsr_id=nsr_id,
+ vnf_member_index=vnf_member_index,
+ name=scaling_aspect['name'],
+ content=json.dumps(scaling_aspect)
+ )
+ log.debug(
+ "Created scaling group record in DB : nsr_id=%s, vnf_member_index=%s, name=%s",
+ scaling_group_record.nsr_id,
+ scaling_group_record.vnf_member_index,
+ scaling_group_record.name)
+ return scaling_group_record
+
+ def _get_or_create_scaling_policy(self, nsr_id: str, scaling_policy: dict, scaling_group_record: ScalingGroup):
+ try:
+ scaling_policy_record = ScalingPolicyRepository.get(
+ ScalingPolicy.name == scaling_policy['name'],
+ ScalingGroup.id == scaling_group_record.id,
+ join_classes=[ScalingGroup]
+ )
+ log.debug("Found existing scaling policy record in DB...")
+ except ScalingPolicy.DoesNotExist:
+ log.debug("Creating scaling policy record in DB...")
+ scaling_policy_record = ScalingPolicyRepository.create(
+ nsr_id=nsr_id,
+ name=scaling_policy['name'],
+ cooldown_time=scaling_policy['cooldown-time'],
+ scaling_group=scaling_group_record,
+ )
+ if 'scale-in-operation-type' in scaling_policy:
+ scaling_policy_record.scale_in_operation = scaling_policy['scale-in-operation-type']
+ if 'scale-out-operation-type' in scaling_policy:
+ scaling_policy_record.scale_out_operation = scaling_policy['scale-out-operation-type']
+ if 'enabled' in scaling_policy:
+ scaling_policy_record.enabled = scaling_policy['enabled']
+ scaling_policy_record.save()
+ log.debug("Created scaling policy record in DB : name=%s, scaling_group.name=%s",
+ scaling_policy_record.name,
+ scaling_policy_record.scaling_group.name)
+ return scaling_policy_record
+
+ def _get_or_create_scaling_criteria(self, nsr_id: str, scaling_criteria: dict,
+ scaling_policy_record: ScalingPolicy):
+ try:
+ scaling_criteria_record = ScalingCriteriaRepository.get(
+ ScalingPolicy.id == scaling_policy_record.id,
+ ScalingCriteria.name == scaling_criteria['name'],
+ join_classes=[ScalingPolicy]
+ )
+ log.debug("Found existing scaling criteria record in DB...")
+ except ScalingCriteria.DoesNotExist:
+ log.debug("Creating scaling criteria record in DB...")
+ scaling_criteria_record = ScalingCriteriaRepository.create(
+ nsr_id=nsr_id,
+ name=scaling_criteria['name'],
+ scaling_policy=scaling_policy_record
+ )
+ log.debug(
+ "Created scaling criteria record in DB : name=%s, scaling_policy.name=%s",
+ scaling_criteria_record.name,
+ scaling_criteria_record.scaling_policy.name)
+ return scaling_criteria_record
+
+ def _get_monitored_vdurs(self, scaling_aspect: dict, vdurs):
+ all_monitored_vdus = set()
+ for delta in scaling_aspect.get('aspect-delta-details', {}).get('deltas', ()):
+ for vdu_delta in delta.get('vdu-delta', ()):
+ all_monitored_vdus.add(vdu_delta.get('id'))
+
+ monitored_vdurs = list(filter(lambda vdur: vdur['vdu-id-ref'] in all_monitored_vdus, vdurs))
+
+ if not monitored_vdurs:
+ log.warning(
+ "Scaling criteria is referring to a vnf-monitoring-param that does not "
+ "contain a reference to a vdu or vnf metric.")
+ return monitored_vdurs