Custom Nginx logging format

I’m trying to figure out if my nginx proxy cache is working or not. Reference these pages to hopefully log cache hits and misses.

#I put this in my nginx vhost config file
log_format up_head ‘$remote_addr [$time_local]’ ‘upstream_cache_status $upstream_cache_status’;
 
#write log using the "up_head" format that I just defined.
access_log /path/to/log/access.log up_head;

Sample log output of the example defined above.

127.0.0.1 [16/Jan/2011:20:22:25 +0000]upstream_cache_status HIT
127.0.0.1 [16/Jan/2011:20:22:26 +0000]upstream_cache_status – 127.0.0.1 [16/Jan/2011:20:22:26 +0000]upstream_cache_status – 127.0.0.1 [16/Jan/2011:20:22:27 +0000]upstream_cache_status HIT
127.0.0.1 [16/Jan/2011:20:22:28 +0000]upstream_cache_status – 127.0.0.1 [16/Jan/2011:20:22:28 +0000]upstream_cache_status – 127.0.0.1 [16/Jan/2011:20:22:45 +0000]upstream_cache_status HIT

http://www.ruby-forum.com/topic/185608

http://wiki.nginx.org/NginxHttpUpstreamModule#.24upstream_addr

http://wiki.nginx.org/NginxHttpLogModule