Munin contributed plugins

#!/bin/sh

# munin plugin to show number of online network hosts on a subnet (needs fping)

# link with subnet name as suffix like _192.168.1

# will most likely need a custom timeout setting in /etc/munin/plugin-conf.d/munin-node

# for example:

# [net_hosts_*]

# timeout 20

#

# (c) 2011 jon@jon.bpa.nu

#%# family=manual

SUBNET=`echo $0 | cut -d'_' -f3`

TIMEOUT=50 # ms

RETRIES=0

case $1 in

	config)

	cat <<CFG

graph_title hosts on network $SUBNET.

graph_vlabel hosts

graph_category network

hosts.label hosts

CFG

	exit 0;;

esac

if [ $SUBNET != "" ]; then

	echo "hosts.value `fping -t $TIMEOUT -r $RETRIES -ga \"$SUBNET.0/24\" 2>/dev/null | wc -l`"

else

	echo "could not get subnet name ($SUBNET)"

fi