This is an example NGINX configuration for the blog: Performing A/B Testing with NGINX - This example demonstrates the sticky route functionality

nginx.conf

events { worker_connections 2014; }

http {
        default_type text/plain;

        log_format cookie '$cookie_route - $route_cookie, '
                          '$request_uri - $route_uri, '
                          '$route - $upstream_addr';

        error_log /var/log/nginx/debug_error.log debug;

        server {
                listen 8098;
                status_zone frontend;
                return 200 "Cookie Value: $cookie_route
Request URI: $request_uri
Results: Site A - Running on port 8089\n";
        }

        server {
                listen 8099;
                status_zone frontend;
                return 200 "Cookie Value: $cookie_route \n
Request URI: $request_uri
Results: Site B - Running on port 8099\n";
        }

        map $cookie_route $route_cookie {
              ~\.(?P<route>\w+)$ $route;
        }

        map $arg_route $route_uri {
              ~\.(?P<route>\w+)$ $route;
        }

        upstream backend {
                zone backend 64k;
                server 127.0.0.1:8098 route=a;
                server 127.0.0.1:8099 route=b;

                sticky route $route_cookie $route_uri;
        }

        server {
                listen 80;

                access_log /var/log/cookie.log cookie;

                location / {
                        proxy_pass http://backend;
                        proxy_set_header X-Forwarded-For $remote_addr;
                }
        }

}