[Nagiosplug-help] How to interpret CRC32 errors?

[Andreas Ericsson]

Ralph.Grothe at itdz-berlin.de wrote:
>>You're asking people to help you on their spare time. Most of
> 
> your 
> 
>>questions so far have been either no-brainers that you would 
>>have been 
>>able to figure out for yourself had you made the effort, or 
>>of the kind 
>>that would take considerable effort to answer properly.
> 
> 
> I know that I waste the time of people who are willing to help
> me.
> 

I wasn't remarking on your questions per se, but the fact that you 
seemed annoyed about an answer you got.

That said, I'll just cut to the chase.

> 
>>Did you log in as the NRPE user or did you just su? su'ing 
>>maintains the 
>>environment settings of the old user, which will have effect on
> 
> some 
> 
>>programs.
> 
> 
> No simple su-ing.
> Even if I had, I would have taken care to do a full "su -" to
> also obtain the account's environment.
> I am and was logged in under the account that I configured inetd
> to run the nrpe server as
> (see 5th field, or 4th field for you)
> 
> [saz at inwo2]
> $ id
> uid=102(saz) gid=20(users) groups=102(saz)
> 
> [saz at inwo2]
> $ grep nrpe /etc/inetd.conf
> nrpe    stream tcp nowait saz /usr/local/nagios/sbin/nrpe nrpe -c
> /usr/local/nagios/etc/nrpe.cfg -i
> 
> 
> 
>>check_hpva.sh prints something to stderr. This causes the 
>>NRPE daemon to 
>>miscalculate the checksum. When the plugin does the same it 
>>arrives at 
>>an invalid result.
> 
> 
> 
> My script isn't writing anything to stderr, and it's outputting a
> single line to stdout
> (which is I think is in accordance to plug-in developer's
> guidelines)
> 

Indeed it is. However, one or more of the commands executed may print 
something to stderr, which will show up as stderr output.

> 
> [saz at inwo2]
> $ /usr/local/nagios/libexec/check_hpva.sh 2>/dev/null | cat -n
>      1  OK:     HP Virtual Array "va" on inwo2 all FRUs State
> Good
> 

Not good. Or more accurate; Perhaps good. You're redirecting stderr to 
/dev/null, so it's impossible to know if the script (or any of its 
commands) print anything to it.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Lead Developer


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