[squid-users] HA Squid forward proxy in parent-parent relationship

Hi,


I have two Squid boxes behind an LVS (Linux Virtual Server) server. The
two boxes are forward proxies for two Apache webservers on the same
private network.

        |
        V
       WEB
        |
        V
      ------
      |LVS |
      ------
     / \
    / \
SQUID1 SQUID2
   | |
Apache1 Apache2
   \ /
    \ /
     ---------
     |Content|
     ---------


Squid1 accelerates Apache1
Squid2 accelerates Apache2

Both squid boxes are set up as parents of each other , but with
"prefer_direct on".

My thinking is that if one of the back-end Apache's goes down then the
Squid that was accelerating that box will go to it's parent (accessing
the alternate Apache.)

I am hoping that by using "prefer_direct on" I will be able to avoid
forward loops. I am presuming that HTTP errors (such as 404's) from the
Web servers won't cause such looping.


Am I right?

TIA,
John
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Received on Fri Nov 17 2006 - 07:28:30 MST