check_nrpe issue

[Andreas Ericsson]

Todd Barbera wrote:
> " That you need to do what says in the readme and look in the logs on the 
> remote site. In 75 cases out of 100, the nrpe host isn't configured to 
> allow the client to connect to it. In about 20% of the cases one end 
> supports (and tries to use) SSL while the other doesn't. In the 
> remaining 5, there is a protocol mismatch (check_nrpe 2.0 being used to 
> poll nrpe 1.8)."
> 
> I think perhaps I wasn't clear on what this issue was given your response.
> check_nrpe does work against these two client hosts. I am able to run
> check_oracle, check_load, and check_disk via check_nrpe all without
> incident. When I downloaded check_log2 and check_log.pl and tried to call
> them via check_nrpe, that is when I received the error. Both check_log2 and
> check_log.pl work fine if I run them locally on the client so I'm not sure
> why it isn't successfully passing the results using nrpe. If I turn on
> debugging, all I see in my syslog are successful connection messages. I have
> read the readme, FAQ's, and mailing lists prior to posting to see if I could
> find an answer, but I was unable to find any information as to why this may
> be the case. Both check_nrpe and nrpe are version 2.0. Both are configured
> for SSL. Here's the relevant section of nrpe.cfg:
> 

Ah. That was missing from the original mail.

> command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
> command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c
> 30,25,20
> command[check_disk]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -l -e
> command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10
> -s Z
> command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c
> 200
> command[check_oracle]=/usr/local/nagios/libexec/check_oracle --login insight
> command[check_log]=/usr/local/nagios/libexec/check_logs.pl -c
> /usr/local/nagios/etc/log.conf
> command[check_log2]=/usr/local/nagios/libexec/check_log2 -F
> /oracle/app/oracle/admin/insight/bdump/alert_insight.log -
> O /usr/local/nagios/tmp/alert_insight.log -q ORA-
> command[check_disksuite]=/usr/local/nagios/libexec/check_disksuite
> 
> All of these can be called successfully using check_nrpe except for
> check_log and check_log2. Any ideas as to why?


Not really, no, although I don't recognize the options for check_log and 
check_log2. That's not exactly odd though since I've seen at least three 
distinctly different versions of it.

You could try running the following command

su - `sed -n s/^nrpe_user=//p`

followed by this slightly longer incantation which should all be on one 
line;

sed -n 's/^command\[\([^]]*\)\]=/\1 /p' /etc/nrpe.conf | while read name 
cmd; do $cmd >/dev/null 2>&1 || (echo "Command $name failed."; $cmd; 
echo); done


NRPE users that have enabled command-line arguments shouldn't try the 
above command, and shouldn't ask me why it isn't working if they do.


> Thanks in advance.
> 
> Todd
> 
> -----Original Message-----
> From: nagios-users-admin at lists.sourceforge.net
> [mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of Andreas
> Ericsson
> Sent: Saturday, October 15, 2005 3:41 AM
> To: nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] check_nrpe issue
> 
> Todd Barbera wrote:
> 
>>Hi,
>>
>>I had tried posting about a problem using NRPE 2.0 and check_log2
> 
> yesterday
> 
>>but unfortunately no one responded. I ended up trying the plug-in
>>check_log.pl, but I'm still getting the same error, which is:
>>
>>CHECK_NRPE: Error receiving data from daemon. 
>>
>>Other plug-ins are working fine, such as check_oracle. I'm running Nagios
>>2.0b3 on a Solaris 9 sparc machine. The client is the same. Does anyone
> 
> have
> 
>>any ideas why the check_log2 and check_log.pl plug-ins do not seem to work
>>with NRPE? BTW, check_log.pl is MUCH faster than check_log2. What exactly
>>does this error message imply?
> 
> 
> 
> That you need to do what says in the readme and look in the logs on the 
> remote site. In 75 cases out of 100, the nrpe host isn't configured to 
> allow the client to connect to it. In about 20% of the cases one end 
> supports (and tries to use) SSL while the other doesn't. In the 
> remaining 5, there is a protocol mismatch (check_nrpe 2.0 being used to 
> poll nrpe 1.8).
> 
> 
>>A search of the mailing lists and FAQ didn't
>>shed any light on it. Thanks in advance for any insight you can offer. 
>>
> 
> 
> I shall have to remedy that. Thanks for pointing it out.
> 

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231


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