Nagios Support Forum

Posted: **Fri May 01, 2015 6:21 am**

Hi all,

I am trying to pass in a variable to an nrpe agent through nagios.

I have a nagios server and have defined a global environment variable e.g

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test_var=Hi

I can manually check that this varaible can be called by doing a

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./check_nrpe -H 123.456.7.8 -c pass_arg -a $test_var

However when I try and pass in arguments into the command e.g

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define service{
    use                        test-service
    host_name                  d3t
    service_description        Pass arg 1
    check_command              pass_arg_h!$test_var
}

It displpays "$" on the nagios webpage, does anybody know why this is and how variables can be passed in?

One aditional question if variables can be defined and called, is there any way to pass in a varaible that performs an action .eg

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define service{
test_var=`ls -l /etc/nagios/ | wc -l`

    use                        test-service
    host_name                  d3t
    service_description        Pass arg 1
    _YahooID    john32
    check_command              pass_arg_h!$test_var
}

Thanks in advance,
djs

Posted: **Fri May 01, 2015 10:43 am**

Are you defining it in /usr/local/nagios/etc/resource.cfg?

If you are you should use:

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define service{
    use                        test-service
    host_name                  d3t
    service_description        Pass arg 1
    check_command              pass_arg_h!$test_var$
}

Instead of:

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define service{
    use                        test-service
    host_name                  d3t
    service_description        Pass arg 1
    check_command              pass_arg_h!$test_var
}

As far as it performing an action you would need to write a wrapper script that would perform the action that you would want to happen and then call the check command that you would want it to run.

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