Hi
This is exactly the issues I am having, but only using squid as a reverse
proxy to a single backend server. Please let me know how you get on and if
you find a fix.
Many thanks
Gordon
----- Original Message -----
From: "Amos Jeffries" <squid3@xxxxxxxxxxxxx>
To: "Jan-Frode Myklebust" <janfrode@xxxxxxxxx>
Cc: <squid-users@xxxxxxxxxxxxxxx>
Sent: Monday, May 12, 2008 5:35 AM
Subject: Re: 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
