Munin contributed plugins

#!/usr/bin/env python

#requires log format as below

#log_format cache '$remote_addr - $host [$time_local] "$request" $status '

#                 '$body_bytes_sent "$http_referer" '

#                 'rt=$request_time ut="$upstream_response_time" '

#                 'cs=$upstream_cache_status';

#License BSD

#Created by Simon Whittaker simon+github@swbh.net

#based on nginx_cache_hit_rate

from __future__ import with_statement

import re

import sys

fname = "/var/log/nginx/access.log"     # File to check

if len(sys.argv) > 1:

        if sys.argv[1]=="config":

                print "graph_args --base 1000 -l 0"

                print "graph_title NGINX Upstream times"

                print "graph_category webserver"

                print "graph_vlabel milliseconds"

                print "upstream.label upstream"

                print "upstream.warning 5000"

                print "upstream.critical 10000"

                print "graph_info Shows the average time of connections to upstream servers for the primary site"

                sys.exit(0)

with open(fname, "r") as f:

    f.seek (0, 2)           # Seek @ EOF

    fsize = f.tell()        # Get Size

    f.seek (max (fsize-20480, 0), 0) # Set pos @ last n chars

    lines = f.readlines()       # Read to end

lines = lines[-1000:] #last 1000 lines you might want to change this

re1='.*?'       # Non-greedy match on filler

re2='(ut)'      # Word 1

re3='(=)'       # Any Single Character 1

re4='([+-]?\\d*\\.\\d+)(?![-+0-9\\.])'  # Float 1

rg = re.compile(re1+re2+re3+re4,re.IGNORECASE|re.DOTALL)

totaltimeforrequests=0

numberofrequests=0

for line in lines:

        m = rg.search(line)

        if m:

                word1=m.group(1)

                c1=m.group(2)

                float1=m.group(3)

                numberofrequests=numberofrequests+1

                totaltimeforrequests=totaltimeforrequests+float(float1)

upstream=(totaltimeforrequests/numberofrequests)*1000

upstream=int(upstream)

print "upstream.value "+str(upstream)