Munin contributed plugins

#!/bin/sh

#

# Copyright (C) 2010 Mohammad ALI. All rights reserved.

#

# munin plugin that logs temperature and humidity from EM01b-STN (Sequoia Websensor)

#

# To install the plugin, copy or move the plugin to /usr/share/munin/plugins/ set

# the chmod to 755 and create a symbolic link:

# ln -s /usr/share/munin/plugins/sequoia_websens /etc/munin/plugins/sequoia_websens

#

# Configuration variables:

#

#       host    - host (default "localhost")

#       port    - port (default "80")

#

# If your environment has a average temperature which differs from the default

# waring and critical value than feel free to configure the warning and critical value

#

#

#  Author

#	Mohammad Ali

#

# Version 1.0

# March 19, 2010

# 01:17:14 PM

#

#%# family=auto

#%# capabilities=autoconf

# These variables are defined in /etc/munin/plugin-conf.d/munin-node

# Define the host (hostname or IP) and the port

host=${host:-localhost}

port=${port:-80}

# Configuration of Munin for graphs and fetching data

if [ "$1" = "config" ]; then

	echo "graph_title Sequoia Websensor"

	echo "graph_info This graph shows the temperature and humidity"

	echo "graph_category sensor"

	echo "graph_args -l 0 -u 100 -r"

	echo "graph.scale no"

	echo "graph_vlabel % and C°"

	echo "tempsens.label Temperature"

	echo "humsens.label Humidity"

	echo "tempsens.warning 19:24"

	echo "humsens.warning :50"

	echo "tempsens.critical 18:25"

	echo "humsens.critical :60"

	exit 0

fi

# HTTP GET REQUEST to retrieve the data from the WebSensor

WEBSENS_DATA_FULL=$(printf "GET $host/index.html?em345678 HTTP/1.0 \n\n" | nc $host $port )

# Selecting line of output (in this case body)

WEBSENS_DATA=$(echo "$WEBSENS_DATA_FULL" | grep body)

# Custom formatting for each type to trace only necessary

WEBSENS_TEMP=$(echo "$WEBSENS_DATA" | cut -d ' ' -f11 | cut -d 'H' -f1)

WEBSENS_HUM=$(echo "$WEBSENS_DATA" | cut -d ' ' -f11 | cut -d ':' -f2 | cut -d '%' -f1)

# Sending custom formatted data to munin to create the graphs

echo "tempsens.value $WEBSENS_TEMP"

echo "humsens.value $WEBSENS_HUM"