Munin contributed plugins

#!/bin/bash

# -*- bash -*-

: << =cut

=head1 NAME

haproxy_sessions_backend -Haproxy Sessions Backend

=head1 CONFIGURATION

[haproxy*]

  user root

  env.backend backend_name_1 backend_name_2 backend_name_3

  env.frontend frontend_name_1 frontend_name_2 frontend_name_3

  # You can use url o socket option, use one of them, not both!

    env.url  http://user:passwd@IP:port/admin?stats;csv

  #  or

    env.socket /var/lib/haproxy/stats.socket

=head1 AUTHOR

Ricardo Fraile <rfrail3@yahoo.es>

=head1 LICENSE

GPLv2

=head1 MAGICK MARKERS

 #%# family=auto

 #%# capabilities=autoconf

=cut

. $MUNIN_LIBDIR/plugins/plugin.sh

function parse_url {

        # Modify ifs variable

        OIFS=$IFS;

        IFS=",";

        PXNAME="$1"

        SVNAME="$2"

        VALUE="$3"

        if [ ! -z "$url" ]; then

                LINE1=`curl -s "$url" | head -1 | sed 's/# //'`

                LINE2=`curl -s "$url" | grep "$PXNAME,$SVNAME"`

        fi

        if [ ! -z "$socket" ]; then

                LINE1=`echo 'show stat' | socat unix-connect:"$socket" stdio | head -1 | sed 's/# //'`

                LINE2=`echo 'show stat' | socat unix-connect:"$socket" stdio | grep "$PXNAME,$SVNAME"`

        fi

        ARRAY1=($LINE1);

        # Find values

        for ((i=0; i<${#ARRAY1[@]}; ++i));

        do

                # Get data

                if [[ "${ARRAY1[$i]}" == "${VALUE}" ]]; then

                        o=$i;

                        o=`expr $o + 1`

                        echo ${LINE2} | cut -d" " -f $o

                fi

        done

        # Reset ifs

        IFS=$OIFS;

}

SVNAME='BACKEND'

LIST="$backend"

WARN_PERCENT="80"

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

	echo yes

	exit 0

fi

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

	echo "graph_title Current sessions ${SVNAME}"

	echo 'graph_args --base 1000 -l 0 '

	echo 'graph_vlabel Sessions'

	echo 'graph_scale no'

	echo 'graph_category loadbalancer'

	echo "graph_info Current sessions ${SVNAME}"

	for i in ${LIST}; do

	        echo "scur`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.label Current Sessions $i"

        	echo "scur`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.type GAUGE"

	        echo "scur`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.min 0"

        	echo "scur`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.info Current Sessions $i"

	        #echo "smax`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.label Max $i"

        	#echo "smax`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.type GAUGE"

	        #echo "smax`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.min 0"

        	#echo "smax`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.info Max sessions $i"

	        echo "slim`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.label Limit Sessions  $i"

        	echo "slim`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.type GAUGE"

	        echo "slim`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.min 0"

        	echo "slim`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.info Limit Sessions $i"

		SLIM=`parse_url ${i} ${SVNAME} slim`

                if [[ "$SLIM" =~ ^[0-9]+$ ]] && [[ "$SLIM" != 0 ]]; then

                   echo "scur`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.critical $SLIM"

                fi

                if [[ "$SLIM" =~ ^[0-9]+$ ]] && [[ "$SLIM" != 0 ]]; then

                        echo "scur`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.warning $((${SLIM}*${WARN_PERCENT}/100))"

                fi

	done

	exit 0

fi

	for i in ${LIST}; do

		SCUR=`parse_url ${i} ${SVNAME} scur`

		#SMAX=`parse_url ${i} ${SVNAME} smax`

		SLIM=`parse_url ${i} ${SVNAME} slim`

	        echo "scur`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.value $SCUR"

        	#echo "smax`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.value $SMAX"

        	echo "slim`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.value $SLIM"

	done