haproxy_active_backend

#!/bin/bash
# -*- bash -*-

: << =cut

=head1 NAME

haproxy_active_backend -Haproxy servers active 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

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

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

	echo "graph_title Active Servers ${SVNAME}"
	echo 'graph_args --base 1000 -l 0 '
	echo 'graph_vlabel Servers'
	echo 'graph_scale no'
	echo 'graph_category loadbalancer'
	echo "graph_info Active Servers ${SVNAME}"

	for i in ${LIST}; do
	        echo "act`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.label Active Servers $i"
        	echo "act`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.type GAUGE"
	        echo "act`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.min 0"
        	echo "act`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.info Active Servers $i"
	done

	exit 0
fi
	for i in ${LIST}; do
		ACT=`parse_url ${i} ${SVNAME} act`
	        echo "act`echo $i | md5sum | cut -d - -f1 | sed 's/ //g'`.value $ACT"
	done