Re: Implementing tables with "pass" directive

>>>>> "Roman" == Roman Medina-Heigl Hernandez <[email protected]> writes:

    Roman> Hello, I've had a look to "passtest" script, which
    Roman> implements GET/GETNEXT/SET over custom objects. I need to
    Roman> implement something similar in a way that snmpd returns a
    Roman> table which is stored on a Database. Have someone already
    Roman> implemented something similar and could send me an example
    Roman> script? Bash/Perl is preferred.

I've made my Bind9 SNMP Statistics script in perl. Full with a working
MIB at http://www.bayour.com/bind9-snmp/.

I'm currently in the process of finishing my Bacula SNMP Statistics
script (also in perl), but with TWO 'linked' tables instead of one,
'flat' table as the Bind9 stats script.

This isn't fully finished, but it ALMOST works (just some fine tuning
left). Can be found at http://www.bayour.com/bacula-snmp/.

    Roman> Isn't there a library which deals with such a task? It's
    Roman> not easy to manually code response to GETNEXT statements.

I CAN tell you that it was/is a nightmare! The problem isn't the actual
retrieval and outputting of data, but trying to (dynamically!) trying
to figure out what OID comes next!

I thing I'm quite happy/proud of the Bacula stats script. It's a little
of spaghetti code still, but I'm hopping to clean that up over the next
few days...


Note that I'm using the 'pass_persist' instead of 'pass' in both
my scripts. That's because I got so poor performance - the script needs
to dump the Bind9 statistics (or load all information from the SQL server
in the Bacula statistics script) EVERY SINGLE TIME it was invoked!
When doing a 'walk', you can imagine the extra overhead. The script
is called ONCE FOR EVERY OID!! Jikes!

Using 'pass_persist', I load the information ONCE, and then reuse that
for every call. I found out that the snmpd kills the script if it haven't
been used 'for a while'. Don't know how long, but a couple of minutes from
the looks of it...


I haven't looked at the SET stuff yet, don't need it (yet). Maybe that
could be on the TODO for the Bacula statistics script? Use a SET to
indicate what job Bacula should start running?

In a 'not to distant' future, I'll implement traps to the Bacula
MIB as well. Could be nice to have a trap generated if/when a job
isn't completed correctly/at all...

-- 
kibo subway PLO Serbian Cocaine president toluene Panama South Africa
genetic smuggle colonel Ft. Bragg iodine Ortega
[See http://www.aclu.org/echelonwatch/index.html for more about this]
[Or http://www.europarl.eu.int/tempcom/echelon/pdf/rapport_echelon_en.pdf]
If neither of these works, try http://www.aclu.org and search for echelon.


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