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 argparse
  23 import logging
  24 import subprocess
  25 import sys
  26
  27 import requests
  28
  29 log = logging.getLogger(__name__)
  30
  31
  32 def main():
  33     parser = argparse.ArgumentParser(prog='osm-mon-healthcheck')
  34     parser.add_argument('--config-file', nargs='?', help='MON configuration file')
  35     # args = parser.parse_args()
  36     # cfg = Config(args.config_file)
  37
  38     if not _processes_running():
  39         sys.exit(1)
  40     if not _is_prometheus_exporter_ok():
  41         sys.exit(1)
  42     sys.exit(0)
  43
  44
  45 def _processes_running():
  46     def _contains_process(processes, process_name):
  47         for row in processes:
  48             if process_name in row:
  49                 return True
  50         return False
  51
  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             log.error("Process %s not running!" % p)
  58             return False
  59     return True
  60
  61
  62 def _is_prometheus_exporter_ok():
  63     try:
  64         r = requests.get('http://localhost:8000')
  65         r.raise_for_status()
  66         return True
  67     except Exception:
  68         log.exception("MON Prometheus exporter is not running")
  69         return False
  70
  71
  72 if __name__ == '__main__':
  73     main()