nginx, sticky session and IIS

Question

I am using nginx as the load balancer and IIS to server asp.net pages. However I am having trouble figuring out how to set sticky session in nginx. Is it possible? Thanks.

Answer 1

The Upstream module does this. In http section:

upstream app {
  ip_hash;

  server backend1;
  server backend2;
}

In your location:

location / {
  proxy_pass http://app;
}

Answer 2

The above answer is correct, to include ip_hash; in your upstream configuration, but I wanted to add, do not fair; or weight or other configurations in upstream as they can conflict with the ip_hashing... If you need sticky sessions based on something other than the IP of the visitor, time to go looking...

http://wiki.nginx.org/NginxHttpUpstreamModule