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

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@treenet.co.nz>
To: "Jan-Frode Myklebust" <janfrode@tanso.net>
Cc: <squid-users@squid-cache.org>
Sent: Monday, May 12, 2008 5:35 AM
Subject: 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 - 11:36:07 MDT