Perl plugins: No output from plugin

Dennis Hopp dhopp at GOCSC.com
Tue Aug 23 15:39:17 CEST 2005


I changed the check command to echo the output.  In the UI I get this:

/opt/nagios/plugins/check_snmp_load.pl -H 10.12.10.29 -C public -w 2,2,3 -c 3,3,4 -L 

So then as the nagios user I copied and pasted that....

-sh-3.00$ /opt/nagios/plugins/check_snmp_load.pl -H 10.12.10.29 -C public -w 2,2,3 -c 3,3,4 -L
Load : 0.00 0.01 0.00 : OK
-sh-3.00$

As you can see there is output...but for some reason nagios is saying there isn't when it fires it off on it's own.

--Dennis

-----Original Message-----
From: Lori Adams [mailto:ladams at cloudmark.com] 
Sent: Monday, August 22, 2005 7:44 PM
To: Dennis Hopp; nagios-users at lists.sourceforge.net
Subject: RE: [Nagios-users] Perl plugins: No output from plugin

When you ran it by hand as nagios user, did you include all relevant arguments?
/opt/nagios/plugins/check_snmp_load.pl -H x.x.x.x -C public -w 2,2,3 -c 3,3,4 -L

Another trick to verify that you're running it by hand correctly is to do 
define command{
       command_name    check_linux_load
       command_line    echo $USER1$/check_snmp_load.pl -H $HOSTADDRESS$ -C public -w $ARG1$ -c $ARG2$ -L
}  
The command will appear in the UI, and then you can run what is shown.  

"No output from plugin" means just that.  Nagios is expecting some kind of statement about the check.  Your check is not outputting anything.   You're getting a difference between running by hand and running automatically.  Get those to be the same, it'll be easier to track down.

-Lori


From: nagios-users-admin at lists.sourceforge.net [mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of Dennis Hopp
Sent: Monday, August 22, 2005 3:54 PM
To: nagios-users at lists.sourceforge.net
Subject: [Nagios-users] Perl plugins: No output from plugin

I'm trying to use the check_snmp_load.pl and check_snmp_storage.pl
 
I can run the plugin from the command line (as both root and nagios user) and get the right results but when it's fired off automatically I keep getting "No output from plugin".
 
Here are the relevant config:
 
define  service{
        use                             generic-service
        hostgroup_name                  LinuxServers
        service_description             LOAD
        is_volatile                     0
        check_period                    24x7
        max_check_attempts              3
        normal_check_interval           5
        retry_check_interval            1
        contact_groups                  domain-admins
        check_command                   check_linux_load!2,2,3!3,3,4
}
 
 
define command{
        command_name    check_linux_load
        command_line    $USER1$/check_snmp_load.pl -H $HOSTADDRESS$ -C public -w $ARG1$ -c $ARG2$ -L
}

 
$USER1$=/opt/nagios/plugins
 
[root at cartier plugins]# ls -l /opt/nagios/plugins/check_snmp_load.pl
-rwxr-xr-x  1 root root 14168 Aug 22 12:42 /opt/nagios/plugins/check_snmp_load.pl
 
Thanks,
 
--Dennis
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