apache + nginx wordpress dynamic cache

nginx.conf http section

    proxy_cache_path /var/cache/nginx levels=2 keys_zone=cache:10m inactive=60m max_size=1024m;
    proxy_cache_key "$host$request_uri $cookie_user";
    proxy_temp_path  /var/cache/nginx/temp;
    proxy_ignore_headers Expires Cache-Control;
    proxy_cache_use_stale error timeout invalid_header http_502;
    proxy_cache_valid any 1d;

location config:

    location / {
        proxy_pass      http://127.0.0.1:8080;
        proxy_pass_header "X-Accel-Redirect";
        proxy_pass_header "X-Accel-Expires";
        proxy_cache cache;