+ def _gather_vnfr_alarm_alerts(self, vnfr, vnfd):
+ alerts = []
+ nsr_id = vnfr["nsr-id-ref"]
+ vnf_member_index = vnfr["member-vnf-index-ref"]
+
+ # Checking for VNF alarm configuration
+ for vdur in vnfr["vdur"]:
+ vdu_id = vdur["vdu-id-ref"]
+ vdu = next(filter(lambda vdu: vdu["id"] == vdu_id, vnfd["vdu"]))
+ if "alarm" in vdu:
+ # Get VDU monitoring params, since alerts are based on them
+ vdu_monitoring_params = {}
+ for mp in vdu.get("monitoring-parameter", []):
+ vdu_monitoring_params[mp.get("id")] = mp
+ if not vdu_monitoring_params:
+ self.logger.error(
+ "VDU alarm refers to a VDU monitoring param, but there are no VDU monitoring params in the VDU"
+ )
+ continue
+ # Get alarms in the VDU
+ alarm_descriptors = vdu["alarm"]
+ # Create VDU alarms for each alarm in the VDU
+ for alarm_descriptor in alarm_descriptors:
+ # Check that the VDU alarm refers to a proper monitoring param
+ alarm_monitoring_param = alarm_descriptor.get(
+ "vnf-monitoring-param-ref", ""
+ )
+ vdu_specific_monitoring_param = vdu_monitoring_params.get(
+ alarm_monitoring_param, {}
+ )
+ if not vdu_specific_monitoring_param:
+ self.logger.error(
+ "VDU alarm refers to a VDU monitoring param not present in the VDU"
+ )
+ continue
+ metric_name = vdu_specific_monitoring_param.get(
+ "performance-metric"
+ )
+ if not metric_name:
+ self.logger.error(
+ "VDU alarm refers to a VDU monitoring param that has no associated performance-metric"
+ )
+ continue
+ # Set params of the alarm to be created in Prometheus
+ metric_name = f"osm_{metric_name}"
+ metric_threshold = alarm_descriptor.get("value")
+ uuid = str(uuid4())
+ alert_name = f"vdu_alarm_{uuid}"
+ operation = alarm_descriptor["operation"]
+ rel_operator = self.rel_operation_types.get(operation, "<=")
+ metric_selector = f'{metric_name}{{ns_id="{nsr_id}", vnf_member_index="{vnf_member_index}", vdu_id="{vdu_id}"}}'
+ expression = f"{metric_selector} {rel_operator} {metric_threshold}"
+ labels = {
+ "ns_id": nsr_id,
+ "vnf_member_index": vnf_member_index,
+ "vdu_id": vdu_id,
+ "vdu_name": "{{ $labels.vdu_name }}",
+ }
+ prom_cfg = {
+ "alert": alert_name,
+ "expr": expression,
+ "for": "1m", # default value. Ideally, this should be related to an IM param, but there is not such param
+ "labels": labels,
+ }
+ alarm_action = dict()
+ for action_type in ["ok", "insufficient-data", "alarm"]:
+ if (
+ "actions" in alarm_descriptor
+ and action_type in alarm_descriptor["actions"]
+ ):
+ alarm_action[action_type] = alarm_descriptor["actions"][
+ action_type
+ ]
+ alert = {
+ "uuid": uuid,
+ "name": alert_name,
+ "metric": metric_name,
+ "tags": {
+ "ns_id": nsr_id,
+ "vnf_member_index": vnf_member_index,
+ "vdu_id": vdu_id,
+ },
+ "alarm_status": "ok",
+ "action_type": "vdu_alarm",
+ "action": alarm_action,
+ "prometheus_config": prom_cfg,
+ }
+ alerts.append(alert)
+ return alerts
+