Nginx with memcache module fallback to upstreams

Question

I want to use nginx with the memcache module to check my memcache server first then if the key is not found then to fallback to my upstream servers. I see lots of examples of proxing to multiple upstream servers (e.g. round robin), but can I fallback in this manner from memcache misses?

Answer 1

Sure, you can. Try something like this:

 location ~* ^.+.(css|js|jpg|png|gif|ico)$ {
        expires                 max;
        set $memcached_key      "$scheme://$host$request_uri";
        memcached_pass          127.0.0.1:11211;
        error_page              404 = @fallback;
 }

 location @fallback {
         internal;
         expires         max;
         proxy_pass      http://127.0.0.1:8080;
         include         /etc/nginx/conf.d/proxy.conf;
         break;
 }