Directors user sessions

[Florian Engelhardt]

On Fri, 28 Mar 2008 12:05:23 +0100
<duja at torlen.net> wrote:

> Hi,
> 
> I got a question regarding the Directors in varnish vcl. 
> If user A is logging in to http://mywebsite.com and the website is
> using varnish (with directors) in front of 4 backend servers. The 4
> backend servers is identical.
> 
> User A is logging in and hits server 1. He then goes to his profile
> and hits server 2. The server 2 doesn't know that user A is logged
> and redirect him to some "Not logged in"-page.
> 
> Is there any way for varnish to lookup which server that user A
> should be directed to? Some kind of Sticky Session function?

You could store the sessions on a separate server, for instance on a
memcache or in a database, or mount the the filesystem where the
session is stored via nfs on every backend server.

Kind regards

Flo