Very simple munin plugin to graph nginx HTTP error codes

nginx_status_codes.py

#!/usr/bin/python
# ALL FAME GOES HERE : https://gist.github.com/mipearson/1146151
#
# 1/ Place where you want (like /usr/share/munin/plugins/nginx_status_codes.py )
# 2/ Link in /etc/munin/plugins/ : 
#     ln -s /usr/share/munin/plugins/nginx_status_codes.py /etc/munin/plugins/nginx_errors 
#     chmod +x /etc/munin/plugins/nginx_errors
# 3/ Test with  
#     munin-run nginx_errors
# 4/ If nescessary : add these lines in your munin conf
# [nginx*]
# user root
# env.access_log /var/log/nginx/blogs.access.log
#
# THanks to mipearson, basti122303 

import re, sys, os

CODES = {
  '400': 'Bad Request',
  '401': 'Unauthorized',
  '403': 'Forbidden',
  '404': 'Not Found',
  '405': 'Method Not Allowed',
  '406': 'Not Acceptable',
  '408': 'Request Timeout',
  '499': 'Client Connection Terminated',
  '500': 'Internal Server Error',
  '502': 'Bad Gateway',
  '503': 'Service Unavailable',
  '504': 'Gateway timeout',
  'Other': 'Other responses'
}

ACCESS_LOG = "/var/log/nginx/access.log"
if 'access_log' in os.environ:
  ACCESS_LOG = os.environ.get('access_log')

if len(sys.argv) > 1 and  sys.argv[1] == 'config':
  print "graph_title nginx Error Codes"
  print "graph_vlabel responses per minute"
  print "graph_category nginx"
  print "graph_period minute"
  print "graph_info Non-200 response codes per minute"
  for code in  CODES:
    print "stat%s.label %s %s" % (code, code, CODES[code])
    print "stat%s.type DERIVE" % (code)
    print "stat%s.min 0" % (code)
else:
  results = {k:0 for k in CODES}
  with open(ACCESS_LOG, 'r') as f:
    for line in f.readlines():
      code = re.search(" (\d\d\d) ", line)
      if code:
        code = code.group(0).strip()
        if code in CODES:
          results[code] += 1
        elif int(code) >= 400:
          results['Other'] += 1

  for k in results:
    print "stat%s.value %s" % (k, results[k])

@basti122303 Yeah, sorry, I corrected the bug on my servers but not here :/