problem with check_yum

[Seth Simmons]

I think I found the problem.  When I ran check_yum locally I forgot it was running as root which explains why it worked.  Running locally as nagios caused the error.  Apparently it isn't the plugin.  If, as nagios, I run yum check-update it tells me I need to be root to access RHN repositories.  Seems CentOS doesn't have that requirement with yum, which explains why it works on all of those systems.

Running check_yum as nagios locally with sudo (nagios ALL=NOPASSWD: /usr/local/nagios/libexec/check_yum) for that one binary works.

Problem now is, using the plugin with sudo through nrpe.  When I try to run through nrpe it returns "unable to read output".

This is the command:
command[check_yum_rhn]=/usr/bin/sudo /usr/local/nagios/libexec/check_yum

been looking around and some have had the same problem; often fixed by adding the complete path to sudo, but it isn't working here.


-----Original Message-----
From: Seth Simmons 
Sent: Wednesday, April 15, 2009 12:43 PM
To: Hari Sekhon
Cc: Nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] problem with check_yum

I refreshed the checks for my CentOS systems and now it shows how many updates are there, which is nice.

However, there is still an issue with my RH 5 system.  If I use this check_yum plugin, it tells me in Nagios "UNKNOWN: Security plugin for yum is required."  I did install this on all my CentOS/RH 5 boxes, but this one thinks it isn't there.

If I run the plugin locally, it works saying there are updates available.
Very strange...


-----Original Message-----
From: Seth Simmons 
Sent: Wednesday, April 15, 2009 12:10 PM
To: Hari Sekhon
Cc: Nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] problem with check_yum

Thanks
This version is more verbose and has more options available; I'll see how this works.


-----Original Message-----
From: Hari Sekhon [mailto:hpsekhon at googlemail.com] 
Sent: Wednesday, April 15, 2009 9:56 AM
To: Seth Simmons
Cc: Nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] problem with check_yum

Seth Simmons wrote:
>
> I’m running nagios 3.0.6 and using check_yum on my red hat/centos boxes.
>
> Today I’ve had all my centos boxes show yum warnings about needed 
> updates; found out centos 5.3 was released.
>
> I have one red hat 5.2 box. The problem is, check_yum within nagios 
> shows ‘o/s is up to date’ as of last check (10 min ago).
>
> If I run it manually from the machine, it gives a warning that updates 
> are needed (verified through yum and rhn).
>
> How can nagios be reporting that yum is ok when it isn’t?
>
Fyi, see

http://www.nagiosexchange.org/cgi-bin/page.cgi?g=Detailed%2F2577.html;d=1

for a better check_yum plugin. I wrote it, the one you are using really 
was too primitive I thought...

I've not seen this behaviour with this plugin, but it gives better 
visibility on how many updates, whether they are security or just 
regular non-critical updates etc...
There is also a note about update check reliability when running as a 
non root user.

-h

-- 
Hari Sekhon
Always open to interesting opportunities
http://www.linkedin.com/in/harisekhon

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