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#!/bin/sh
#
# Script for monitoring nginx Virtual host output traffic
#
# Requierements: 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=${logtail:-`which logtail`}
STATEFILE=/var/lib/munin/plugin-state/nginx_vhost_traffic.state
VHOSTS=${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 Nginx'
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
}'