RE: [squid-users] SNMP which object?

 
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Have you considered using the proxy.pac autoconfigure script?

once the server dies, it'll back up onto a differant proxy server,
this wouldn't fix your inital problem of monitoring the proxy server
it's self, but it would avoid rebuilding DNS tables everytime it
died. the other problem would be 3000 PCs all connecting to one web
server may be a bad idea, and reconfiguration of browsers might be
fun too.

just a thought, might help?

Edmund Haworth
Assistant Network Engineer
Worcester College of Technology
Deansway
Worcs WR1 2JF

Tel: +44 1905 725516
Fax: +44 1905 28906
E-mail: ehaworth@wortech.ac.uk

- -----Original Message-----
From: Palmer J.D.F. [mailto:J.D.F.Palmer@Swansea.ac.uk]
Sent: 27 March 2001 12:51
To: 'squid-users@squid-cache.org'
Subject: [squid-users] SNMP which object?

Hi,

I have SNMP running on my squid servers and am monitoring them with
MRTG.
What I would like to do now is to use SNMP to detect whether the
squid
process has stopped responding for whatever reason.

At present I have a cron job which pings my main cache every 2 mins,
if
there is no response, the DNS tables are rebuilt re-assigning
wwwcache.swan.ac.uk to the IP address of the backup cache. The main
cache
is continually pinged until it is back up again, at this point the
DNS
tables are rebuilt again. Hence redirecting http traffic back
through the
main cache server.

The reason we were using ping was because we had an intermittent
hardware
fault which was the cause of 99% of crashes, this caused a kernel
panic and
therefore the network card would stop responding to ping. However
this HW
fault has been fixed and ping is no longer suitable for this type of
monitoring as squid/something else may die but ping still responds.

As we force nearly 3000 PC's through the cache, it is imperative that
problems are detected and the caches switched ASAP, as users are
unable to
access external sites whilst the cache is down.

I am going to use SNMP from now on to detect squid fatalities, but
I'd like
to know which SNMP objects I should use to base my testing on.

If anyone has any thought on this I'd be grateful

Many thanks,

Jezz Palmer.

****************************************
Jezz Palmer.
Internet Systems Officer.
Library and Information Services
University of Wales, Swansea
Singleton Park
Swansea
SA2 8PP
Tel 01792 513260
****************************************

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Received on Tue Mar 27 2001 - 05:41:05 MST