Nagios daemon (release 2.0b3) not catching signals as I would exp ect

[Andreas Ericsson]

Ralph.Grothe at itdz-berlin.de wrote:
> 
> I found that if the running nagios daemon receives a SIGHUP, that
> it hangs itself instead of reinitializing after last final words
> of
> 
> $ grep SIGHUP /var/opt/nagios/log/nagios.log 
> [1122984843] Caught SIGHUP, restarting...
> 
> 
> Having been sent a second SIGHUP it dies completely.
> 
> Similarly sending the running nagios a SIGTERM it also gets hung.
> It always requires a second SIGTERM to finish it.
> 

This is weird, and most likely has something to do with the scheduling 
mechanism of the OS, since this works in the POSIX way on other systems.

Note that Nagios will wait for currently running checks to finish before 
dying though, so that might be what you're seeing.

> 
> I want the nagios daemon be started and halted at system startup
> and shutdown.
> Thus I wrote the wee SysV inspired RC script below that I would
> simply want to source
> and issue a "nagios start" or "nagios stop" below.
> 
> Are there any quirks (especially with regard to AIX) that I would
> have to consider
> when starting/stopping/restarting the nagios daemon, or should
> the below at least theoretically work?
> 

TAFO (Try And Find Out). That way you'll also learn if it works in 
practice rather than theory, which I assume is much more interesting.

I'm not all that excited about visually debugging someone else's script 
that's longer than 5 lines, and I'm fairly sure others aren't thrilled 
about it either.

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


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