[sclug] Load balancing

[Alex Butcher]

On Tue, 5 Aug 2008, n.a.haughton at bigfoot.com wrote:

>> If you need stateful tracking of web applications, I suspect you're out
>> of luck without looking at things like F5's BIG-IP product range.
>>
> I was having a look at Pound today, which puports to be a lightweight load
> balancer that should just work, so it looks ideal.

Indeed; and I'm happy to be corrected that there are more sophisticated Free
load balancers than I was previously aware of.

[snip]

> What is actually happening is - nothing. The client browser is sending the
> request to the Ubuntu machine, but no response is coming back.  I have set
> Pound to listen on the IP address of the Ubuntu machine, port 80 - does
> anyone know if this is what I am meant to do?

Sounds about right. I'd get a copy of Wireshark running on your client
machine and the Ubuntu machine and see what each sees. My guess is that
you've got a firewall on the Ubuntu host that's preventing connections being
established to Pound on port 80.

> Neil

HTH,
Alex.
-- 
Alex Butcher, Bristol UK.                           PGP/GnuPG ID:0x5010dbff

"[T]he whole point about the reason why I think it is important we go for
identity cards and an identity database today is that identity fraud and
abuse is a major, major problem. Now the civil liberties aspect of it, look
it is a view, I don't personally think it matters very much."
  - Tony Blair, 6 June 2006 <http://www.number-10.gov.uk/output/Page9566.asp>