check_dns with check_nrpe issue

Tom Gwilt tgwilt at suite224.net
Wed Jan 21 15:18:06 CET 2009


Hello,

Obligatory preface - I have searched the FAQ and other sources for the 
answer with little success:

OS - server --> Ubuntu 8.1
OS - client --> FBSD6.1
nrpe (server & client) --> 2.8.1

nagios version 3.0.2

I am trying to check the dns process on our secondary dns server using 
the following from the monitoring host:

/usr/local/nagios/libexec/check_nrpe -H 72.2.95.6 -c check_dns -H 
mail.suite224.net -s 72.2.95.6

The response is: NRPE: Command 'check_dns' not defined

The check_dns command is defined on the secondary server in the 
commands.cfg file as:
define command{
         command_name    check_dns
         command_line     $USER1$/check_dns -H www.suite224.net -s localhost
         }

I can execute the check_dns command locally on gypsy:

gypsy# /usr/local/nagios/libexec/check_dns -H mail.suite224.net -s localhost
DNS OK: 1.014 seconds response time. mail.suite224.net returns 
72.2.95.2|time=1.013970s;;;0.000000

BUT - it seems to not work with nrpe:

gypsy# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_dns
NRPE: Command 'check_dns' not defined

What is annoying is that I am able to use the check_nrpe/check_dns 
combination with success on our primary dns server.

What am I doing wrong?

Thanks,

Tom Gwilt



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