Nagios check wrapper script for zabbix

[globifrosch]

i wanted to use the check_mysql_health script in zabbix. wrote a little wrapper script which returns the data in zabbix usable format. it may work with other nagios checks too.

- Thomas

#!/bin/sh
# 
# zabbix-nagios-wrapper <plugin> <args> (<state>|<value> <valuename>)
#
# Examples:
# zabbix-nagios-wrapper check_mysql_health "--mode slave-lag" value slave_lag
# <numeric return>
#
# zabbix-nagios-wrapper check_mysql_health "--mode slave-lag" state
# <0=OK,1=WARNING,2=CRITICAL>
#
# Howto configure ZABBIX Agentd:
# zabbix_agentd.conf: Add
# UserParameter=zabbix-nagios-wrapper[*],<Path-to>/zabbix-nagios-wrapper "$1" "$2" "$3" "$4"
# 1 = pluginname
# 2 = args
# 3 = state or value
# 4 = name of value (only if 3 = value)
#
# Edit /etc/zabbix/nagios-wrapper.env to point env PLUGINDIR to the nagios plugins directory
# Add any other env vars needed by checks to nagios-wrapper.env
#
# Limitation:
# Don't know any way how to pass a , (comma) in the args field in zabbix webgui
#
# (c) Thomas Mueller <[email protected]>
# License: GPL v3 (http://www.gnu.org/licenses/gpl-3.0.txt)

test -f /etc/zabbix/nagios-wrapper.env && . /etc/zabbix/nagios-wrapper.env

PLUGIN=$1
ARGS=$2
STATEORVALUE=$3
VALUENAME=$4

PLUGINDIR=${PLUGINDIR:=/usr/libexec}

if [ -f "$PLUGINDIR/$PLUGIN" ]
then
	if [ "$STATEORVALUE" = "state" ]
	then
		state=$($PLUGINDIR/$PLUGIN $ARGS | cut -d" " -f1)
		case "$state" in
			OK) echo 0;;
			WARNING) echo 1;;
			CRITICAL) echo 2;;
			*) echo "ERROR: not found OK, WARNING or CRITICAL";;
		esac
	elif [ "$STATEORVALUE" = "value" ]
	then
		values=$($PLUGINDIR/$PLUGIN $ARGS | cut -d\| -f2)

		for i in $values
		do 
			if echo "$i" | grep $VALUENAME >/dev/null
			then
				value=$(echo $i | cut -f2 -d= | cut -f1 -d\; | egrep -o '[[:digit:]\.]+')
				echo $value;
				exit
			fi
		done
	fi
else
	echo "ERROR: $PLUGINDIR/$PLUGIN not found" && exit 1
fi

[t2y]

Hi globifrosch,

It's absorbing script!
I have tried invoking that wrapper script.
Here is my result, and I have a question.

# /usr/libexec/check_mysql_health --username root --password xxxxxxxx --database zabbix --mode uptime
OK - database is up since 36 minutes | uptime=2208s
# ./zabbix-nagios-wrapper.sh check_mysql_health "--username root --password xxxxxxxx --database zabbix --mode uptime" value uptime
2209

It works for me.

# /usr/libexec/check_mysql_health --username root --password xxxxxxxx --database zabbix --mode tablecache-hitrate
CRITICAL - table cache hitrate 40.76% | tablecache_hitrate=40.76%;99:;95: tablecache_fillrate=100.00%
# echo $?
2

It's displayed error message. I don't know the specification of the check_mysql_health script.
In this case,

# ./zabbix-nagios-wrapper.sh check_mysql_health "--username root --password xxxxxxxx --database zabbix --mode tablecache-hitrate" value tablecache-hitrate
# echo $?
0

that wrapper script displays nothing and the status code is zero. I think it's better to output error message which check_mysql_health displays. Or, it should change the status code.

[globifrosch]

thanks, i only tested OK state so far...

here a new version of the script with better error handling.

#!/bin/sh
# 
# zabbix-nagios-wrapper <plugin> <args> (state|<value> <valuename>)
#
# Examples:
# zabbix-nagios-wrapper check_mysql_health "--mode slave-lag" value slave_lag
# <numeric return>
#
# zabbix-nagios-wrapper check_mysql_health "--mode slave-lag" state
# <0=OK,1=WARNING,2=CRITICAL>
#
# Howto configure ZABBIX Agentd:
# zabbix_agentd.conf: Add
# UserParameter=zabbix-nagios-wrapper[*],<Path-to>/zabbix-nagios-wrapper "$1" "$2" "$3" "$4"
# 1 = pluginname
# 2 = args
# 3 = state or value
# 4 = name of value (only if 3 = value)
#
# Edit /etc/zabbix/nagios-wrapper.env to point env PLUGINDIR to the nagios plugins directory
# Add any other env vars needed by checks to nagios-wrapper.env
#
# Limitation:
# Don't know any way how to pass a , (comma) in the args field in zabbix webgui
#
# (c) Thomas Mueller <[email protected]>
# License: GPL v3 (http://www.gnu.org/licenses/gpl-3.0.txt)

test -f /etc/zabbix/nagios-wrapper.env && . /etc/zabbix/nagios-wrapper.env

PLUGIN=$1
ARGS=$2
STATEORVALUE=$3
VALUENAME=$4


PLUGINDIR=${PLUGINDIR:=/usr/libexec}

if [ -x "$PLUGINDIR/$PLUGIN" ]
then
	if [ "$STATEORVALUE" = "state" ]
	then
		"$PLUGINDIR/$PLUGIN" $(echo $ARGS) >/dev/null
		ret=$?
                if [ $ret -gt 2 ]
		then
			echo "ERROR: check exited with $ret (params: $PLUGIN , $ARGS , $STATEORVALUE , $VALUENAME)"
			exit $ret
		fi
		echo $ret
	elif [ "$STATEORVALUE" = "value" ]
	then
		if [ -z "$VALUENAME" ]
		then
			echo "ERROR: valuename is missing (params: $PLUGIN , $ARGS , $STATEORVALUE , $VALUENAME)"
			exit 3
		fi

		values=$($PLUGINDIR/$PLUGIN $ARGS)
		ret=$?

		if [ $ret -gt 2 ]
                then
                        echo "ERROR: check exited with $ret (params: $PLUGIN , $ARGS , $STATEORVALUE , $VALUENAME)"
                        exit $ret
                fi

		values=$(echo $values | cut -d\| -f2)

		for i in $values
		do 
			if echo "$i" | grep "$VALUENAME=" >/dev/null
			then
				value=$(echo $i | cut -f2 -d= | cut -f1 -d\; | egrep -o '[[:digit:]\.]+')
				echo $value;
				exit
			fi
		done
		echo ERROR: \"$VALUENAME\" not found
		exit 3
	fi
else
	echo "ERROR: $PLUGINDIR/$PLUGIN not found or not executable" && exit 3
fi

[t2y]

Thank you for quick response. It's kindness for users!

# ./zabbix-nagios-wrapper.sh check_mysql_health "--username root --password xxxxxxxx --database zabbix --mode tablecache-hitrate" value tablecache-hitrate
ERROR: "tablecache-hitrate" not found
# echo $?
3

[randybb]

, -> .

# Limitation:
# Don't know any way how to pass a , (comma) in the args field in zabbix webgui


you can replace comma with dot.

values=$($PLUGINDIR/$PLUGIN $ARGS | sed "s/\([0-9]\),\([0-9]\)/\1.\2/g")