Nagios own command use

[aleksandrs.jurcenko]

Hi,

i wanted to use this command in my Nagios: ssh [email protected] "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3"

if i run it, it works good. But how can i define it like a command?

define command{
command_name my_com
command_line ssh [email protected] "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3"
}

there will be error.

Also i tried make bash script "my_command.sh" where will be this command:
#!/bin/sh
ssh [email protected] "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3"

and after that in command.cfg use i wrote:

define command{
command_name my_com
command_line $USR1$/my_command.sh
}

But there also will be error.

Please, said me how can i write this command correctly?

[jdalrymple]

For this you're going to want to use `check_by_ssh`:

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[jdalrymple@localhost ~]$ /usr/local/nagios/libexec/check_by_ssh --help
check_by_ssh v2.0.3 (nagios-plugins 2.0.3)
Copyright (c) 1999 Karl DeBisschop <[email protected]>
Copyright (c) 2000-2014 Nagios Plugin Development Team
        <[email protected]>

This plugin uses SSH to execute commands on a remote host

Usage:
 check_by_ssh -H <host> -C <command> [-fqv] [-1|-2] [-4|-6]
       [-S [lines]] [-E [lines]] [-t timeout] [-i identity]
       [-l user] [-n name] [-s servicelist] [-O outputfile]
       [-p port] [-o ssh-option] [-F configfile]

So in your case the command could look like this:

Code: Select all

define command{
command_name my_com
command_line $USER1$/check_by_ssh -H $HOSTADDRESS$ -l dir+dcsc_ldap -C "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3"
}

This will require that you configure the nagios user to have a public ssl key that is authorized on the remote system for the specified user. This is pretty clumsy and I highly recommend you look into doing this using nrpe instead of ssh.

[aleksandrs.jurcenko]

Can I make it without check_by_ssh and check_nrpe?

I need that it was like:
ssh [email protected] "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3"

How I can put it to command?

define command{
command_name my_com
command_line "ssh [email protected] "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3""
}

???

[jdalrymple]

That should be very possible. I would recommend wrapping that up into a shell script.

Code: Select all

#!/usr/bin/bash
ssh [email protected] "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3"
exit $?

Obviously your nagios user would still have to logon using its public key, there is no way for Nagios to pass in the password.

I still very much encourage using nrpe, it is trivial to setup and this is exactly what it was designed to do.

[aleksandrs.jurcenko]

I wrote:

my3.sh (bash script)

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#!/bin/sh
ssh [email protected] "/usr/local/nagios/libexec/check_load -w 1,1,1 -c 3,3,3"
exit $?

and in .cfg file I call:

Code: Select all

define command{
        command_name    my_com
        command_line    $USER1$/my3
        }

and the output in the Nagios is:

(No output on stdout) stderr: execvp(/usr/local/nagios/libexec/my3, ...) failed. errno is 2: No such file or directory

But the file location is correct...

[jdalrymple]

You indicated that the file name is my3.sh but in your command definition you just used my3. Is that the problem?

Also, is the script executable by the nagios user?

[aleksandrs.jurcenko]

No problem is not in my3.sh

yes, i can run script manually.
./my3.sh
all will work

[jdalrymple]

I'm sorry, I think you misunderstood what I meant.

You showed us your command definition:

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define command{
        command_name    my_com
        command_line    $USER1$/my3
        }

But I think maybe it should be:

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define command{
        command_name    my_com
        command_line    $USER1$/my3.sh
        }

[aleksandrs.jurcenko]

no, I understood you.
I have tried with both variant, the result is the same

(No output on stdout) stderr: execvp(/usr/local/nagios/libexec/my3, ...) failed. errno is 2: No such file or directory

[ssax]

It needs to be:

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define command{
        command_name    my_com
        command_line    $USER1$/my3.sh
        }

Please post the output of the following:

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ls -l /usr/local/nagios/libexec/my3*