Ip_hash and real_ip_header

Server NGINX
1

Hi,

I’ve got Nginx 0.7.64 running as a loadbalancer / transformation proxy
behind varnish. I’d like to use ip_hash so users get the benefit of
session affinity on my app servers. Though I seem to have
real_ip_header setup correctly ($remote_addr is correct as shown by
X-Real-IP on my app servers), all the requests end up using only a
single app server. Here’s the relevant parts of my config:

http {
…
set_real_ip_from 127.0.0.1;
real_ip_header X-Forwarded-For;
…
upstream backend {
ip_hash;
server 127.0.0.2:5011;
server 127.0.0.2:5012;
}
…

Should this work?

Laurence

2

Hi,

Laurence Rowe wrote:

…
Should this work?

Should do AFAICT. Have you tried compiling with debug on - information
about IP addresses is given if you have debug_http set in the config
file?

Have you tried round-robin to check that both servers work that way?

btw, if you don’t need to have a trace of all the IP addresses of the
servers, using X-Real-IP as the ‘real_ip_header’ is marginally quicker
than X-Forwarded-For.

Marcus.