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Itai Ganot
Asked: 2012-10-11 02:52:35 +0800 CST

Nagios - Is it possible to force check of all hosts by using a command in any given moment?

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I've fixed many issues on servers which indicated errors on Nagios but for some reason the alert is still up even though the problem has been fixed. So i was wondering, is there a way to force check all hosts?

centos

4 Answers

  1. Best Answer

    The easiest way by far is to simply restart Nagios. Upon a restart it will begin a new checking cycle.

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  2. So i was wondering, is there a way to force check all hosts?

    SCHEDULE_FORCED_HOST_SVC_CHECKS external command is what you're looking for.

    To get all of your hosts, take a look at the MK Livestatus:

    # echo -e 'GET hosts\nColumns: host_name' | unixcat /usr/local/nagios/var/rw/live

    then pipe to the SCHEDULE_FORCED_HOST_SVC_CHECKS command:

    echo -e 'GET hosts\nColumns: host_name' | unixcat /usr/local/nagios/var/rw/live | while read host; do echo "[$(date +%s)] SCHEDULE_FORCED_HOST_SVC_CHECKS;$host;$(date +%s)\n" $(date +%s) >> /usr/local/nagios/var/rw/nagios.cmd; done

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  3. Here's a bash script based on Nagios' sample script and the external command "SCHEDULE_FORCED_HOST_SVC_CHECKS":

    #!/bin/sh
# This is a sample shell script showing how you can submit the SCHEDULE_HOST_SVC_CHECKS command
# to Nagios. Adjust variables to fit your environment as necessary.

now=`date +%s` commandfile='/usr/local/nagios/var/rw/nagios.cmd'

for i in hosts/*.cfg
        do
                SITE=$(grep host_name $i | head -1 | sed 's/host_name//' | tr -d '[:blank:]')
                /usr/bin/printf "[%lu] SCHEDULE_HOST_SVC_CHECKS;${SITE};1110741500\n" $now > $commandfile
        done
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  4. https://github.com/joshforcier/nagiosForceImmediateCheck

    Here is a Nagios XI component to force an immediate check on multiple hosts/services.

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