#!/bin/sh
#
# Plugin to monitor the number of active connections to the mysql server
#
# Parameters:
# 	
# 	config
# 	autoconf
#
# Configuration variables
#
#	mysqlopts    - Options to pass to mysql which should include the
#  			username, password, host and alternc database.
#
# Example of the entry in plugin-conf.d/munin-node
#	[alternc*]
#	user root
#	env.mysqlopts --defaults-file=/etc/mysql/alternc.cnf
#
#
#%# family=auto
#%# capabilities=autoconf

MYSQLOPTS="$mysqlopts"
MYSQL=${mysql:-mysql}

if [ "$1" = "autoconf" ]; then
        $MYSQL --version 2>/dev/null >/dev/null
        if [ $? -eq 0 ]
        then
                $MYSQL $MYSQLOPTS -N -B -e 'show tables' 2>/dev/null >/dev/null
                if [ $? -eq 0 ]
                then
                        echo yes
                        exit 0
                else
                        echo "no (could not connect to mysql)"
                fi
        else
                echo "no (mysql client not found)"
        fi
        exit 1
fi

if [ "$1" = "config" ]; then
	echo 'graph_title Apache - mysql connections by user'
	echo 'graph_vlabel quantity'
	echo 'graph_category alternc'
        $MYSQL $MYSQLOPTS -N -B -e "SHOW PROCESSLIST" | awk ' {foo[$2]++} END {for (f in foo) { print f".label" , f }}'
	exit 0
fi

$MYSQL $MYSQLOPTS -N -B -e "SHOW PROCESSLIST" | awk ' {foo[$2]++} END {for (f in foo) { print f".value" , foo[f] }}'