Nginx Cache Valid till - Help

[rajivv]

Hi,

I have a issue my nginx cofig is working ok just i want cache to clear
only once in 15 days.
But it is clearing everyday and new images showing on homepage ( we use
random images hence on each refresh its new)
however with nginx it needs to show same page and images etc picked from
cache.
It works ok for 24 hours then again refreshes all content...as if cache
is clear.

Here is Nginx conf
------------------------
user  nginx;
worker_processes  16;
worker_rlimit_nofile 100000;

error_log   /var/log/nginx/error.log crit;
#error_log  /var/log/nginx/error.log  notice;
#error_log  /var/log/nginx/error.log  info;

pid        /var/run/nginx.pid;


events {
    worker_connections  102400;
    use epoll;
}


http {
    proxy_cache_path /var/lib/nginx/tmp/cache1 levels=1:2
keys_zone=proxy_cache1:16m max_size=20g inactive=1d;
    proxy_cache_path /var/lib/nginx/tmp/cache2 levels=1:2
keys_zone=proxy_cache2:16m max_size=40g inactive=30d;
    proxy_temp_path /var/lib/nginx/tmp/proxy;

    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local]
"$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  off;# /var/log/nginx/access.log  main;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    server_tokens   off;
    gzip            on;
    gzip_static     on;
    gzip_comp_level 5;
    gzip_min_length 1024;
    keepalive_timeout  65;
-----------------------------------

Here is cache inc
-----------------------------------
   access_log off;
    location / {
    proxy_pass	http://96.30.58.176:80;
    include /etc/nginx/generic.inc;
    proxy_ignore_headers "Cache-Control" "Expires";
    proxy_cache_key
"$server_name$scheme$proxy_host$uri$is_args$args$cookie_sid";
    proxy_cache	proxy_cache1;
    proxy_cache_use_stale updating error timeout invalid_header
http_500;
    proxy_cache_valid 15d;
    }

    location ~*
^.+\.(jpg|jpeg|gif|png|svg|js|css|mp3|ogg|mpe?g|avi|zip|gz|bz2?|rar)$ {
    proxy_pass	http://96.30.58.176:80;
    include /etc/nginx/generic.inc;
    proxy_ignore_headers "Cache-Control" "Expires";
    proxy_cache_key "$server_addr:$server_port$request_uri";
    proxy_cache	proxy_cache2;
    proxy_cache_use_stale updating error timeout invalid_header
http_500;
    proxy_cache_valid 15d;
    }
---------------------------------------

Here is site.conf in called conf.d called
----------------------------------------
server {
    listen       96.30.58.176:8080;
    server_name  www.site.com;
    include /etc/nginx/cache.inc;
    location /nginx_status {
    stub_status on;
      }
	  if ($http_host ~* "^site\.com$"){
	set $rule_0 1$rule_0;
	}
	if ($rule_0 = "1"){
	rewrite ^/(.*)$ http://www.site.com/$1 permanent;
	break;
	}
}

Regards

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,150639,150639#msg-150639