osm_mon/cmd/mon_healthcheck.py

   1 # Copyright 2018 Whitestack, LLC
   2 # *************************************************************
   3
   4 # This file is part of OSM Monitoring module
   5 # All Rights Reserved to Whitestack, LLC
   6
   7 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   8 # not use this file except in compliance with the License. You may obtain
   9 # a copy of the License at
  10
  11 #         http://www.apache.org/licenses/LICENSE-2.0
  12
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  15 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  16 # License for the specific language governing permissions and limitations
  17 # under the License.
  18
  19 # For those usages not covered by the Apache License, Version 2.0 please
  20 # contact: bdiaz@whitestack.com or glavado@whitestack.com
  21 ##
  22 import asyncio
  23 import logging
  24 import subprocess
  25 import sys
  26
  27 import requests
  28 from aiokafka import AIOKafkaConsumer
  29
  30 from osm_mon.core.settings import Config
  31
  32 log = logging.getLogger(__name__)
  33
  34
  35 def main():
  36     # Check Kafka
  37     if not _processes_running():
  38         sys.exit(1)
  39     if not _is_kafka_ok():
  40         sys.exit(1)
  41     if not _is_prometheus_exporter_ok():
  42         sys.exit(1)
  43     sys.exit(0)
  44
  45
  46 def _processes_running():
  47     def _contains_process(processes, process_name):
  48         for row in processes:
  49             if process_name in row:
  50                 return True
  51         return False
  52     processes_to_check = ['osm-mon-collector', 'osm-mon-evaluator', 'osm-mon-server']
  53     ps = subprocess.Popen(['ps', 'aux'], stdout=subprocess.PIPE).communicate()[0]
  54     processes_running = ps.decode().split('\n')
  55     for p in processes_to_check:
  56         if not _contains_process(processes_running, p):
  57             return False
  58     return True
  59
  60
  61 def _is_prometheus_exporter_ok():
  62     try:
  63         r = requests.get('http://localhost:8000')
  64         r.raise_for_status()
  65         return True
  66     except Exception:
  67         log.exception("MON Prometheus exporter is not running")
  68         return False
  69
  70
  71 def _is_kafka_ok():
  72     async def _test_kafka(loop):
  73         cfg = Config.instance()
  74         consumer = AIOKafkaConsumer(
  75             'healthcheck',
  76             loop=loop, bootstrap_servers=cfg.BROKER_URI)
  77         await consumer.start()
  78         await consumer.stop()
  79
  80     try:
  81         loop = asyncio.get_event_loop()
  82         loop.run_until_complete(_test_kafka(loop))
  83         return True
  84     except Exception:
  85         log.exception("MON can not connect to Kafka")
  86         return False
  87
  88
  89 if __name__ == '__main__':
  90     main()