How can the nginx balancer "teach" to give a static page, for example index.php?

Question

Nginx

Good afternoon.
Please tell me whether it is possible to replace the index.php page on the nginx balancer, and send requests to other pages to upstreams.
Thanks in advance :)

Answer 1

In the code below: nginx first checks for the exact specified address (with an equals sign). Everything else will not match and will be proxied.

server {
  root ...;
  index index.php;
  location = /index.php {
    # do what you want with it
    fastcgi_pass /path/to/fpm/sock/file;
  }

  location / {
    # not matching /index.php here, so passing over to upstream
    proxy_pass http://your.upstream/;
    ...
  }    
}

Answer 2

and what is the problem?