Nginx Log Parser

[schlag]

I implemented cache stats in Zabbix by parsing the access logs using
logtail with an offset file every minute, and submitting value counts
for $upstream_cache_status to the zabbix server trapper via
zabbix_sender.  our rps is 50 or less, so processing this log every
minute isn't really a big deal yet.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,138438,227541#msg-227541