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#!/bin/bash
#
# munin plugin to monitor bans on Fail2ban jails
#
# Origional Author: Thomas Leveil
# Contributors: none
# Version: 1.1
#
###############################################
# You have to specify a different user in the munin-node config file as follow:
#
# [fail2ban_all_jails]
# user root
###############################################
#
# HISTORY
# v1.1 : better autoconf
#
#%# family=contrib
#%# capabilities=autoconf
case $1 in
autoconf)
if [ -z $(which fail2ban-client) ]; then
echo no
exit 1
fi
if [ $(whoami) != "root" ]; then
echo "no (fail2ban-client found but must run as root)"
exit 1
fi
if [ -x $(which fail2ban-client) ]; then
echo yes
exit 0
else
echo "no (fail2ban-client found but not executable)"
exit 1
fi
;;
config)
echo "graph_title Fail2ban"
echo 'graph_vlabel active bans'
echo 'graph_category Network'
echo 'graph_info number of jailled ip'
echo 'graph_info This graph shows the amount of bans caught by Fail2ban'
$(which fail2ban-client) status | awk '/Jail list:/ { for (i=4; i<=NF; i++) { sub(/,$/,"",$i); jail=$i; sub(/-/,"_",$i); print "fail2ban_"$i".label "jail } }'
exit 0
;;
esac
$(which fail2ban-client) status | awk '/Jail list:/ { for (i=4; i<=NF; i++) { sub(/,$/,"",$i); print $i } }' | \
while read JAIL; do
echo -n "fail2ban_${JAIL//-/_}.value "
$(which fail2ban-client) status $JAIL | awk '/Currently banned:/ { print $NF }'
done
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