[hobbit] Monitoring hosts behind a load balancer

15 Jun 2010 · _| |novosirj at umdnj.edu - 973/972.0922 (2-0922) \__

      -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Steve Holmes wrote:
...
On Tue, Jun 15, 2010 at 12:42 PM, Ralph Mitchell
<ralphmitchell at gmail.com <mailto:ralphmitchell at gmail.com>> wrote:
I used to have some scripts that would make SOAP requests to an F5
to get the pools and pool member status.  I no longer have access to
that system, but I may have a backup at home.

I based my scripts on a bunch of example programs in the F5 SDK.
 IIRC, I altered a couple of the perl scripts to output lines like:

     pool1 server1 OK
     pool1 server2 DOWN
     etc...

Then you just run around a loop reading the lines and sending BB
status messages.

As long as your F5 is checking the servers occasionally, this
approach works OK.

Ralph Mitchell

On Tue, Jun 15, 2010 at 12:07 PM, Steve Holmes &lt;sholmes42 at mac.com
&lt;mailto:sholmes42 at mac.com>> wrote:

    Greetings, I'm monitoring several Solaris 10 servers which are
    behind an F5 load balancer. One of the features of the F5 is
    that it answers pings for all of the hosts behind it, even if
    they are all down. Has anyone devised a method of testing the
    servers for being alive in this context? There are no other
    network based tests being done. Yes, all of the other tests
    eventually go purple in Xymon, but we'd like to know that the
    hosts are down when that happens.

    Thanks,
    Steve Holmes
    ITaP/Purdue University
Thanks! I'll check with the F5 admin to see if this might be doable.
Steve
It would not surprise me though if this is exactly what the F5 devmon
template gives you via SNMP. Might be worth a check. If you just
download the tar and look at the templates directory under F5, you'll
the OID's file should tell you what's monitored. Hate to see duplication
of effort. :)

---- _  _ _  _ ___  _  _  _
|Y#| |  | |\/| |  \ |\ |  | |Ryan Novosielski - Sr. Systems Programmer
|$&| |__| |  | |__/ | \| _| |novosirj at umdnj.edu - 973/972.0922 (2-0922)
\__/ Univ. of Med. and Dent.|IST/CST-Academic Svcs. - ADMC 450, Newark
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkwXsn8ACgkQmb+gadEcsb5+KwCgv2/6zJNTnSQofAK8Hv/goFcs
pqgAoJAE38TUulVbW6rwmVbS+lMAz3/1
=AMRr
-----END PGP SIGNATURE-----

[hobbit] Monitoring hosts behind a load balancer

novosirj＠umdnj.edu