check_snmp_load and check_snmp_mem output (null) issue.

[Fernando Feijo]

Looking at the config it seems that the community string reference in the pasted command definition (-c $ARG3$) will refer to the parameter "90" from the service definition, when the manual run shown implies "90" should be the critical value, not the community string. A possible fix would be adding "!public!" in the service definition and changing the community string call to "-c $ARG4$" in the command definition.



On Feb 10, 2013, at 2:48 PM, Ronald Prague <rprague at gmail.com> wrote:

> So I have an odd issue.  Running check_snmp_mem.pl and check_snmp_load.pl from Manbulon's check_snmp plugins is returning (null) and I can't figure out why.
> 
> (The firewall is an Astaro/Sophos UTM 320)
> I tried turning on debugging, this is the output:
> 
> [1360352407.069695] [016.1] [pid=23937] HOST: clk_astaro, SERVICE: Firewall Load , CHECK TYPE: Active, OPTIONS: 0, SCHEDULED: Yes, RESCHEDULE: Yes, EXITED OK: Yes, RETURN CODE: 2, OUTPUT: (null)
> 
> 
> If I run the command by hand, it works fine, as the nagios user, I've also verified the nagios user has write access to /tmp just in case:
> 
> nagios at monitor:/usr/local/nagios#  /usr/local/nagios/libexec/check_snmp_load.pl -H 192.168.0.2 -C public -T stand -w 25 -c 90
> 2 CPU, average load 5.0% < 25% : OK
> 
> 
> Here's the command:
> 
> define command{
>   command_name check_snmp_load_v1
>   command_line $USER1$/check_snmp_load.pl -H $HOSTADDRESS$ $USER7$ -T $ARG1$ -w $ARG2$ -c $ARG3$ $ARG4$
> }
> 
> 
> And the service definition:
> 
> define service{
>         use                     generic-service ; Inherit values from a template
>         host_name               clk_astaro
>         service_description     Firewall Load
>         check_command           check_snmp_load_v1!stand!25!90
>         }
> 
> 
> $USER1$ and $USER7$ are defined in resource.cfg:
> 
> $USER1$=/usr/local/nagios/libexec
> $USER7$=-C public
> 
> The only changes to the plugin are for fixing the error for a version string, from this page: https://wiki.icinga.org/display/howtos/check_snmp
> Argument "v6.0.1" isn't numeric in numeric lt (<)
> This sources from old plugins getting a changed version string in libnet-snmp-perl. This can be fixed by replacing all occurences of the integer less than equal by the string compare 'lt'.
> 
> # sed -i 's/Net::SNMP->VERSION < 4/Net::SNMP->VERSION lt 4/g' check_snmp_mem.pl
> 
> Any ideas? All of the other services/checks work fine.
> ------------------------------------------------------------------------------
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