#!/bin/sh
# 
# Plugin to monitor the number of connections to RabbitMQ
#
# Usage: Link or copy into /etc/munin/node.d/
#
# Parameters
#     env.conn_warn <warning connections>
#     env.conn_crit <critical connections>
#
# Magic markers (optional - only used by munin-config and some
# installation scripts):
#
#%# family=auto
#%# capabilities=autoconf

# If run with the "autoconf"-parameter, give our opinion on wether we
# should be run on this system or not. This is optinal, and only used by
# munin-config. In the case of this plugin, we should most probably
# always be included.

if [ "$1" = "autoconf" ]; then
	echo yes
	exit 0
fi

# If run with the "config"-parameter, give out information on how the
# graphs should look. 

if [ "$1" = "config" ]; then
        CONN_WARN=${queue_warn:-500}
        CONN_CRIT=${queue_crit:-1000}

	# The host name this plugin is for. (Can be overridden to have
	# one machine answer for several)

	# The title of the graph
	echo 'graph_title RabbitMQ connections'
	# Arguments to "rrdtool graph". In this case, tell it that the
	# lower limit of the graph is '0', and that 1k=1000 (not 1024)
	echo 'graph_args --base 1000 -l 0'
	# The Y-axis label
	echo 'graph_vlabel queue_size'
	# We want Cur/Min/Avg/Max unscaled (i.e. 0.42 load instead of
	# 420 milliload)
	#echo 'graph_scale no'

	echo "connections.label Connections"
	echo "connections.warning $CONN_WARN"
	echo "connections.critical $CONN_CRIT"
	echo "connections.info Number of active connections"

	echo 'graph_info Shows the number of connections to RabbitMQ'
	# Last, if run with the "config"-parameter, quit here (don't
	# display any data)
	exit 0
fi

# If not run with any parameters at all (or only unknown ones), do the
# real work - i.e. display the data. Almost always this will be
# "value" subfield for every data field.

echo "connections.value $(rabbitmqctl list_connections | grep -v "^Listing" | grep -v "done.$" | wc -l)"