Munin contributed plugins

#!/bin/sh

#

# Script for monitoring nginx Virtual host output traffic

#

# Requirements: logtail awk

# one unique access log file with $bytes_sent value for more accuracy

# check http://wiki.nginx.org/NginxHttpLogModule

#

# Configuration Options (all options have defaults)

# [nginx_vhost_traffic]

#

# Virtual host list

# env.vhosts "example.com example.net example.org"

#

# Log path

# env.logdir = /var/log/nginx

# env.flogfile = access.log

#

# Position of the $bytes_sent in the access.log file

# env.bparam 11

#

# Aggregate subdomains

# ex: example.com will match www.example.com, webmail.example.com and *example.com

# BUG: will also match also www.bad-example.com

# env.aggregate true #change to false to disable aggregation

#

# To report bugs, improvements or get updates

# see http://github.com/joanpc/nginix_vhost_traffic

#

# inspired in postfix_filtered_awk

# Copyright (c) 2010, Joan Perez i Cauhe

LOGDIR=${logdir:-/var/log/nginx}

ACCESS_LOG=$LOGDIR/${logfile:-access.log}

LOGTAIL=${logtail:-`which logtail`}

STATEFILE=$MUNIN_PLUGSTATE/nginx_vhost_traffic.state

VHOSTS=${vhosts:-`hostname`}

AGGREGATE=${aggregate:true}

BPARAM=${bparam:-11}

case $1 in

   config)

   	DRAW=AREA

	echo 'graph_title Nginx Virtual host traffic'

	echo 'graph_vlabel bits out / ${graph_period}'

	echo 'graph_args --base 1000 -l 0'

	echo 'graph_category webserver'

	i=0

	for vhost in $VHOSTS

	do

		i=$(($i + 1))

		echo vhost$i.label $vhost

		echo vhost$i.type ABSOLUTE

		echo vhost$i.cdef vhost$i,8,*

		echo vhost$i.draw $DRAW

		DRAW=STACK

	done

	echo rest.label Rest

	echo rest.type ABSOLUTE

	echo rest.cdef rest,8,*

	echo rest.draw STACK

    exit 0;;

esac

export BPARAM

export VHOSTS

export AGGREGATE

# Awk Script

$LOGTAIL ${ACCESS_LOG} -o $STATEFILE | awk '

BEGIN {

split(ENVIRON["VHOSTS"], hosts)

for (host in hosts) { track[hosts[host]] = host}

}

{

		cn[$2]+=$ENVIRON["BPARAM"]

}

END {

		for (host in cn) {

		if (match(ENVIRON["AGGREGATE"], "true")) {

			found = 0

			for (vhost in track) {

				if (index(host, vhost)) {

				res[vhost] += cn[host]

				found = 1

				break

				}

			}

			if (! found) rest+=cn[host]

		} else {

			if (host in track) {

				res[host] += cn[host]

			} else rest+=cn[host]

		}

		}

		print "aggregate: " ENVIRON["AGGREGATE"]

		for (vhost in track) print "vhost" track[vhost] ".value " res[vhost]+0

		print "rest.value " rest + 0

}'