The ngx_http_random_index_module module processes requests ending with the slash character (‘/’) and picks a random file in a directory as an index file. It works before the ngx_http_index_module module.

This module is not built by default, it should be enabled with the --with-http_random_index_module configuration parameter.

location / {
    random_index on;
}

random_index off;

Enables or disables module processing in a surrounding location.