# For those usages not covered by the Apache License, Version 2.0 please
# contact: bdiaz@whitestack.com or glavado@whitestack.com
##
-import json
+import asyncio
import logging
import multiprocessing
import time
+from enum import Enum
+import peewee
import requests
from osm_common.dbbase import DbException
from osm_mon.collector.backends.prometheus import OSM_METRIC_PREFIX
from osm_mon.core.common_db import CommonDbClient
+from osm_mon.core.config import Config
from osm_mon.core.database import DatabaseManager, Alarm
-from osm_mon.core.message_bus.producer import Producer
+from osm_mon.core.message_bus_client import MessageBusClient
from osm_mon.core.response import ResponseBuilder
-from osm_mon.core.settings import Config
log = logging.getLogger(__name__)
+class AlarmStatus(Enum):
+ ALARM = 'alarm'
+ OK = 'ok'
+ INSUFFICIENT = 'insufficient-data'
+
+
class Evaluator:
- def __init__(self):
- self.common_db = CommonDbClient()
+
+ def __init__(self, config: Config, loop=None):
+ self.conf = config
+ if not loop:
+ loop = asyncio.get_event_loop()
+ self.loop = loop
+ self.common_db = CommonDbClient(self.conf)
self.plugins = []
- self.database_manager = DatabaseManager()
+ self.database_manager = DatabaseManager(self.conf)
self.database_manager.create_tables()
self.queue = multiprocessing.Queue()
+ self.msg_bus = MessageBusClient(config)
def _evaluate_metric(self,
nsr_id: str,
alarm: Alarm):
log.debug("_evaluate_metric")
# TODO: Refactor to fit backend plugin model
- cfg = Config.instance()
query_section = "query={0}{{ns_id=\"{1}\",vdu_name=\"{2}\",vnf_member_index=\"{3}\"}}".format(
OSM_METRIC_PREFIX + metric_name, nsr_id, vdur_name, vnf_member_index)
- request_url = cfg.OSMMON_PROMETHEUS_URL + "/api/v1/query?" + query_section
+ request_url = self.conf.get('prometheus', 'url') + "/api/v1/query?" + query_section
log.info("Querying Prometheus: %s", request_url)
- r = requests.get(request_url)
+ r = requests.get(request_url, timeout=int(self.conf.get('global', 'request_timeout')))
if r.status_code == 200:
json_response = r.json()
if json_response['status'] == 'success':
result = json_response['data']['result']
- if len(result):
+ if result:
metric_value = float(result[0]['value'][1])
log.info("Metric value: %s", metric_value)
if alarm.operation.upper() == 'GT':
if metric_value > alarm.threshold:
- self.queue.put(alarm)
+ self.queue.put((alarm, AlarmStatus.ALARM))
+ else:
+ self.queue.put((alarm, AlarmStatus.OK))
elif alarm.operation.upper() == 'LT':
if metric_value < alarm.threshold:
- self.queue.put(alarm)
+ self.queue.put((alarm, AlarmStatus.ALARM))
+ else:
+ self.queue.put((alarm, AlarmStatus.OK))
else:
log.warning("No metric result for alarm %s", alarm.id)
+ self.queue.put((alarm, AlarmStatus.INSUFFICIENT))
+
else:
log.warning("Prometheus response is not success. Got status %s", json_response['status'])
else:
def evaluate_forever(self):
log.debug('evaluate_forever')
- cfg = Config.instance()
while True:
try:
self.evaluate()
- time.sleep(cfg.OSMMON_EVALUATOR_INTERVAL)
+ time.sleep(int(self.conf.get('evaluator', 'interval')))
+ except peewee.PeeweeException:
+ log.exception("Database error evaluating alarms: ")
+ raise
except Exception:
log.exception("Error evaluating alarms")
p.start()
for process in processes:
- process.join()
- triggered_alarms = []
+ process.join(timeout=10)
+ alarms_tuples = []
while not self.queue.empty():
- triggered_alarms.append(self.queue.get())
- for alarm in triggered_alarms:
- self.notify_alarm(alarm)
+ alarms_tuples.append(self.queue.get())
+ for alarm, status in alarms_tuples:
p = multiprocessing.Process(target=self.notify_alarm,
- args=(alarm,))
+ args=(alarm, status))
p.start()
- def notify_alarm(self, alarm: Alarm):
+ def notify_alarm(self, alarm: Alarm, status: AlarmStatus):
log.debug("notify_alarm")
+ resp_message = self._build_alarm_response(alarm, status)
+ log.info("Sent alarm notification: %s", resp_message)
+ self.loop.run_until_complete(self.msg_bus.aiowrite('alarm_response', 'notify_alarm', resp_message))
+
+ def _build_alarm_response(self, alarm: Alarm, status: AlarmStatus):
response = ResponseBuilder()
now = time.strftime("%d-%m-%Y") + " " + time.strftime("%X")
- # Generate and send response
- resp_message = response.generate_response(
+ return response.generate_response(
'notify_alarm',
alarm_id=alarm.uuid,
vdu_name=alarm.vdur_name,
operation=alarm.operation,
threshold_value=alarm.threshold,
sev=alarm.severity,
- status='alarm',
+ status=status.value,
date=now)
- producer = Producer()
- producer.send(topic='alarm_response', key='notify_alarm', value=json.dumps(resp_message))
- producer.flush()
- log.info("Sent alarm notification: %s", resp_message)