server
{
listen 80;
server_name img1;
access_log /var/log/nginx/img1.log;
open_file_cache max=10000;
open_file_cache_valid 360s;
open_file_cache_min_uses 2;
open_file_cache_errors on;

location ^~ /img/
{
root /var/www;


location ~ ^/img/(<?IMG>.+)$
{
try_files
/img1/$img
/img2/$img
/img3/$img
/img4/$img
/img5/$img
/img6/$img
=404;
}
}
}