Re: [squid-users] squid going bananas on rr-dns servers

> I have a couple of webservers with a shared filesystem (for
> /var/lib/php/session and more), identical apache config and
> enforced https on all connections.
>
> We use round robin dns to distribute the load over them. This
> seems to be working perfectly fine with direct connections, but
> when accessed trough squid, the pages never fully loads. The browser
> ends up looping over all elements in the page again and again..
>
> The squid access.log fills up with:
>
> 1210543497.362 257 192.168.11.16 TCP_MISS/200 4472 CONNECT
> rrdnshostname:443 janfrode DIRECT/192.168.41.6 -
> 1210543497.559 106 192.168.11.16 TCP_MISS/200 3512 CONNECT
> rrdnshostname:443 janfrode DIRECT/192.168.41.5 -
> 1210543497.747 174 192.168.11.16 TCP_MISS/200 21485 CONNECT
> rrdnshostname:443 janfrode DIRECT/192.168.41.6 -
> 1210543499.581 193 192.168.11.16 TCP_MISS/200 5080 CONNECT
> rrdnshostname:443 janfrode DIRECT/192.168.41.5 -
> 1210543500.606 931 192.168.11.16 TCP_MISS/200 4248 CONNECT
> rrdnshostname:443 janfrode DIRECT/192.168.41.6 -
> 1210543500.970 235 192.168.11.16 TCP_MISS/200 3880 CONNECT
> rrdnshostname:443 janfrode DIRECT/192.168.41.5 -
> 1210543501.342 313 192.168.11.16 TCP_MISS/200 3896 CONNECT
> rrdnshostname:443 janfrode DIRECT/192.168.41.6 -
>
> so I guess this can be a problem with squid trying to distribute
> the load over both servers, instead of just picking one as the non-squid
> browser would do. But even without squid, we can see that the browser
> handles failover to the next host just fine as soon as the dns ttl expires
> and it picks the second ip-address.
>
> Any ideas what might be causing the problem here ? Can we make squid stick
> with one ip-address for longer periods, instead of going to both addresses
> simultaneously?

  balance_on_multiple_ip off
in squid.conf should stop any IP-rotation within squid unless the IP its
trying to use fails.

Please in future indicate which version of squid you are using.

I sort of get the idea you are attempting to accelerate / reverse-proxy
the website through squid though. For one of those setups please see:
  http://wiki.squid-cache.org/SquidFaq/ReverseProxy

Amos
Received on Mon May 12 2008 - 04:35:12 MDT