Difference between check_multi output on host and output received by chech_by_ssh

[Marc Powell]

On Oct 27, 2010, at 4:04 AM, Tim Edwards wrote:

snip...

> However when I run it from the nagios server I don't see the output from
> our sendmail mailqueue check, which is the last check listed in our
> /usr/local/nagios/checks/systemhealth.cmd file:
> 
> <td></td><td></td><td>system_mailqueue</td><td></td></tr></table></div></div>|check_multi::check_multi::plugins=11
> time=0.309348 system_load::check_load::load1=0.000;10.000;20.000;0;
> load5=0.000;8.000;16.000;0; load15=0.000;6.000;12.000;0;
> system_rootdisk::check_disk::/=1786MB;9420;9717;0;9916
> system_allpartitions::default::/=1786MB;9420;9717;0;9916
> /diska=150MB;9575;9877;0;10079 system_swap::check_swap::swap=0MB;0;0;0;0
> system_users::check_users::users=2;15;25;0
> system_time::check_ntp_time::offset=-0.002565s;60.000000;120.000000;
> 
> Full commands and output at http://pastebin.com/vEWBa033
> 
> Anyone have any ideas what could be causing the difference?

For your local test, you're running check_multi as 'root', which has permission to access sendmail's queue, whereas when nagios does it, it's being run as the 'nagios' user, which does not have access?

Your likely best course of action is change check_mailq to use sudo when calling /usr/bin/mailq and configure sudo to permit it. Google has quite a bit of info on 'nagios check_mailq permissions' but this page looks useful to you --

http://www.rickwargo.com/category/nagios/

Note also that you'll need to set '!requiretty' in sudoers as well.

--
Marc


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