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contrib-munin/plugins/nginx/nginx_upstream

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#!/usr/bin/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)