nagios check_cluster generator

README.md

nagios check_cluster generator v2

why

• minimize manual configuration
• minize notifications from cluster hosts when clustered services are all down (notify only from new fake cluster host)

use

• copy the SAMPLE.cfg.sh to clu-{MYNODEPREFIX}.cfg.sh
• chmod +x
• run it

info

with included sample settings,this generates 3 config files for nagios:

• clu-{MYNODEPREFIX}-clu-deps-GEN.cfg - dependency of real services on cluster checks
• clu-{MYNODEPREFIX}-clu-host-GEN.cfg - fake host with assigned cluster checks
• clu-{MYNODEPREFIX}-clu-services-GEN.cfg - all services on real nodes

clu-checks-GENERATOR.sh

#!/bin/bash

source $1

#####
exec > clu-${NODE_PREFIX}clu-deps-GEN.cfg

echo "
#
# WARNING: this is generated file
#
"

for SERVICE in $SERVICES
do

for i in `seq 1 $NODES`
do
echo "

define servicedependency{
        host_name                       ${NODE_PREFIX}X-clu
        service_description             CLU:$SERVICE
        dependent_host_name             ${NODE_PREFIX}$i${NODE_SUFFIX}
        dependent_service_description   $SERVICE
        execution_failure_criteria      n
        notification_failure_criteria   c
}
"
done
done

#####
exec > clu-${NODE_PREFIX}clu-host-GEN.cfg

echo "
#
# WARNING: this is generated file
#
"
echo "
define host {
        host_name	${NODE_PREFIX}X-clu
        alias		${NODE_PREFIX}X-clu
        address		127.0.0.1
	use		${HOST_TEMPLATE}
}
"

#####
exec > clu-${NODE_PREFIX}clu-services-GEN.cfg

echo "
#
# WARNING: this is generated file
#
"
for SERVICE in $SERVICES
do

echo "
define service {
        use                             SYSMON-MIT-HA
	host_name 			${NODE_PREFIX}X-clu
	service_description 		CLU:$SERVICE
"

echo -n '	check_command			check_service_cluster!"'"$SERVICE"'"!0!'"$(($NODES - 1))"'!'
for i in `seq 1 $NODES` ; do echo -n '$SERVICESTATEID:'"${NODE_PREFIX}$i${NODE_SUFFIX}:$SERVICE"'$,' ; done | sed -e 's/,$//' ; echo


echo '
	max_check_attempts              1
}
'

done

clu-myhostprefix-SAMPLE.cfg.sh

#!/bin/bash clu-checks-GENERATOR.sh

NODES=8
NODE_PREFIX=my-hostprefix-
NODE_SUFFIX=.domain.xxx
SERVICES="sys:cluster sys:libvirt-cross"
HOST_TEMPLATE=generic-host