Recursive Error Pages or how to try more than one location

[Elena Zwetkow]

Hello list,

i have to store images on 3 servers. Image processing runs on all of the 3 servers and spreading the images over the 3 servers is a background task, so it takes some time the images are available on all 3 servers.

Nginx should try to fetch the image from an other server. But my configuration only works 1 level depth. Nginx never trys to fetch from location @s2 or @s3.

How can i configure nginx trying to find the image on all 3 server?

Any hints are welcome. 

Thanks


server {
  
  listen 80;
  root /var/www/nginx-default;
  
  recursive_error_pages on;

    location @s1 {
        internal;
        proxy_pass              http://192.168.0.10;
        proxy_intercept_errors  off;
        proxy_store             on;
        proxy_store_access      user:rw  group:rw  all:rw;
        proxy_temp_path         /var/www/nginx-default/tmp;
        root                    /var/www/nginx-default;
        recursive_error_pages   on;
        error_page              404 502 = @s2;
    }
  
    location @s2 {
        internal;
        proxy_pass              http://192.168.0.20;
        proxy_store             on;
        proxy_store_access      user:rw  group:rw  all:rw;
        proxy_temp_path         /var/www/nginx-default/tmp;
        root                    /var/www/nginx-default;
        recursive_error_pages   on;
        error_page              404 502 = @s3;
    }

  
    location @s3 {
        internal;
        proxy_pass              http://192.168.0.30;
        proxy_store             on;
        proxy_store_access      user:rw  group:rw  all:rw;
        proxy_temp_path         /var/www/nginx-default/tmp;
        root                    /var/www/nginx-default;
        recursive_error_pages   on;
        error_page              404 = /404.htm;
    }

  
    location ~* \.(jpg|jpeg)$ {
        root                    /var/www/nginx-default;
        error_page              404 = @node1;
    }   
}
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