Re: SNMP Traps

On Tue, Oct 06, 2009 at 09:24:05AM -0500, Scott Behrens wrote:
> I was wondering if anyone had experience writing custom MIB's or
> working with SNMP Traps.  I need to come up with a custom trap for
> detecting core dumps on some systems I've been working with.  The
> information I have found seems pretty confusing and complex, and I was
> wondering if anyone had good tips.

I never run my own SNMP trap manager.  Never liked SNMP for that
sort of thing.  Its been a long time since I looked, but most of
the SNMP manager consoles I have seen where big bloated, buggy
pieces of crap.  No kidding.  Plus, SNMP is not so simple as the
name implies to work with.  I've had better luck using syslog
for similar functionality.

Something else I've used that I'd propose is something like a
safetynet script.  You can do something basic in a start-up
script like this:

  STOP_RUN=/path/to/file/to/touch/for/normal/shutdown
  while [ ! -f ${STOP_RUN} ]
  do
    /path/to/crappy/app
    sleep 5
    echo 'restarting' | mail -s '### crappy app alert' [email protected]
  done


If crapp appy crashes, the control script should start it up again,
unless you've touched the file pointed to by STOP_RUN.  You want
that in case you actually want to stop the app for real and not
have it automatically restarted.

John
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