check_actuator_health.py

   1 #! /usr/bin/env python
   2
   3 ###############################################################################
   4 # Nagios plugin template
   5 #
   6 # Notes
   7 # - The RHEL boxes I work on are currently limited to Python 2.6.6, hence the
   8 #   use of (deprecated) optparse. If I can ever get them all updated to
   9 #   Python 2.7 (or better yet, 3.3), I'll switch to argparse
  10 # - This template runs in 2.6-3.3. Any changes made will need to be appropriate
  11 #   to the Python distro you want to use
  12 #
  13 ###############################################################################
  14
  15 __author__ = 'mr.it@cbs.dk - Michael Rasmussen'
  16 __version__= 0.1
  17
  18 try:                                                 #   RHEL8                                         RHEL9
  19     from optparse import OptionParser, OptionGroup   #
  20     import logging as log
  21     import sys
  22     import urllib3 as urllib                         #   python3-urllib3-1.24.2-5.el8.noarch.rpm       python3-urllib3-1.26.5-3.el9.noarch.rpm
  23     import json
  24 except:
  25     sys.exit(2)
  26
  27 ## These will override any args passed to the script normally. Comment out after testing.
  28 #testargs = '--help'
  29 #testargs = '--version'
  30 #testargs = '-vvv'
  31 testing = True
  32
  33 OK_RESPONSE = """
  34 {
  35   "status": "UP",
  36   "components": {
  37     "db": {
  38       "status": "UP",
  39       "details": {
  40         "database": "PostgreSQL",
  41         "validationQuery": "isValid()"
  42       }
  43     },
  44     "diskSpace": {
  45       "status": "UP",
  46       "details": {
  47         "total": 2013582688256,
  48         "free": 1635574571008,
  49         "threshold": 10485760,
  50         "path": "/home/mir/git/soasi-course-catalog-course-target-adapter/.",
  51         "exists": true
  52       }
  53     },
  54     "ping": {
  55       "status": "UP"
  56     }
  57   }
  58 }"""
  59 DOWN_RESPONSE = """
  60 {
  61   "status": "DOWN",
  62   "components": {
  63     "db": {
  64       "status": "DOWN",
  65       "components": {
  66         "adapterDataSource": {
  67           "status": "DOWN",
  68           "details": {
  69             "error": "org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection"
  70           }
  71         },
  72         "es3DataSource": {
  73           "status": "UP",
  74           "details": {
  75             "database": "Microsoft SQL Server",
  76             "validationQuery": "isValid()"
  77           }
  78         },
  79         "providersDataSource": {
  80           "status": "DOWN",
  81           "details": {
  82             "error": "org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection"
  83           }
  84         }
  85       }
  86     },
  87     "diskSpace": {
  88       "status": "UP",
  89       "details": {
  90         "total": 1013309239296,
  91         "free": 882010726400,
  92         "threshold": 10485760,
  93         "path": "C:\\Users\\hf.it\\Projects\\smart-integrations\\adapters\\target\\soasi-invigilation-report-target-adapter",
  94         "exists": true
  95       }
  96     },
  97     "ping": {
  98       "status": "UP"
  99     }
 100   }
 101 }
 102 """
 103 def main():
 104     """ Main plugin logic goes here """
 105
 106     ## Parse command-line arguments
 107     args, args2 = parse_args()
 108
 109     ## Uncomment to test logging levels against verbosity settings
 110     # log.debug('debug message')
 111     # log.info('info message')
 112     # log.warning('warning message')
 113     # log.error('error message')
 114     # log.critical('critical message')
 115     # log.fatal('fatal message')
 116     options = vars(args)
 117     keyword = options['keyword']
 118     url = options['url']
 119     agent = options['agent']
 120     if keyword is None or url is None:
 121         message = "Keywork: {0} url: {1}".format(keyword, url)
 122         status = 3
 123         log.fatal(message)
 124     else:
 125         try:
 126             if not testing:
 127                 req_headers = {
 128                         'User-Agent':  agent
 129                 }
 130                 http = urllib.PoolManager()
 131                 response = http.request(
 132                     'GET', url, headers = req_headers
 133                     )
 134                 data = response.data.decode('utf-8').replace("\\"," ")
 135             else:
 136                 data = DOWN_RESPONSE.replace("\\"," ")
 137                 data = json.loads(data)
 138             if 'status' in data and data['status'] == keyword:
 139                 message = "UP"
 140                 status = 2
 141             else:
 142                 message = gather_message(data)
 143                 status = 0
 144         except Exception as e:
 145             print(e)
 146             message = "DOWN"
 147             status = 2
 148
 149     gtfo(status, message)
 150
 151 def gather_message(json_data):
 152     """ Assemble error messages """
 153     msg = None
 154     try:
 155         if 'components' in json_data:
 156             components = json_data['components']
 157             for component in components:
 158                 items = components[component]
 159                 if 'components' in items:
 160                     for item in items['components']:
 161                         if 'status' in items['components'][item] and items['components'][item]['status'].upper() == 'DOWN':
 162                             if msg is not None:
 163                                 msg += "\n{0}: {1}".format(item, items['components'][item]['details']['error'])
 164                             else:
 165                                 msg = "{0}: {1}".format(item, items['components'][item]['details']['error'])
 166                 else:
 167                     if 'status' in items and items['status'].upper() == 'DOWN':
 168                         if msg is not None:
 169                             if 'details' in items and 'error' in items['details']:
 170                                 error = items['details']['error']
 171                             else:
 172                                 error = "No error message"
 173                             if msg is not None:
 174                                 msg += "\n{0}: {1}".format(component, error)
 175                             else:
 176                                 msg = "{0}: {1}".format(component, error)
 177         else:
 178             sys.exit(3)
 179     except:
 180         sys.exit(3)
 181     return msg
 182
 183
 184 def parse_args():
 185     """ Parse command-line arguments """
 186
 187     parser = OptionParser(usage='usage: %prog [-v|vv|vvv] [options]',
 188                           version='{0}: v.{1} by {2}'.format('%prog', __version__, __author__))
 189
 190     ## Verbosity (want this first, so it's right after --help and --version)
 191     parser.add_option('-v', help='Set verbosity level',
 192                       action='count', default=0, dest='v')
 193
 194     ## CLI arguments specific to this script
 195     group = OptionGroup(parser,'Plugin Options')
 196     group.add_option('-a', '--agent', help="User agent for request. Default: Python-nagios",
 197         default="Python-nagios",  type='string')
 198     group.add_option('-k', '--keyword', help="Keyword to search for in response", default=None)
 199     group.add_option('-t', '--testing', help="Run in testing mode", default=False, action='store_true')
 200     group.add_option('-u', '--url', help="URL to requested resource", default=None)
 201
 202     ## Common CLI arguments
 203     #parser.add_option('-c', '--critical', help='Set the critical threshold. Default: %(default)s',
 204     #                  default=97, type=float, dest='crit', metavar='##')
 205     #parser.add_option('-w', '--warning', help='Set the warning threshold. Default: %(default)s',
 206     #                  default=95, type=float, dest='warn', metavar='##')
 207
 208     parser.add_option_group(group)
 209
 210     ## Try to parse based on the testargs variable. If it doesn't exist, use args
 211     try:
 212         args, args2 = parser.parse_args(testargs.split())
 213     except NameError:
 214         args, args2 = parser.parse_args()
 215
 216     ## Set the logging level based on the -v arg
 217     log.getLogger().setLevel([log.ERROR, log.WARN, log.INFO, log.DEBUG][args.v])
 218
 219     log.debug('Parsed arguments: {0}'.format(args))
 220     log.debug('Other  arguments: {0}'.format(args2))
 221
 222     return args, args2
 223
 224 def gtfo(exitcode, message=''):
 225     """ Exit gracefully with exitcode and (optional) message """
 226
 227     log.debug('Exiting with status {0}. Message: {1}'.format(exitcode, message))
 228
 229     if message:
 230         print(message)
 231     exit(exitcode)
 232
 233 if __name__ == '__main__':
 234     ## Initialize logging before hitting main, in case we need extra debuggability
 235     log.basicConfig(level=log.DEBUG, format='%(asctime)s - %(funcName)s - %(levelname)s - %(message)s')
 236     main()