Extended Apache LogFormat for logstash

log.conf

LogFormat "{ \
 \"@source\":\"file://<%= @host %>/<%= @log_path %>/<%= @name %>-logstash.log\", \
 \"@source_host\": \"<%= @host %>\", \
 \"@source_path\": \"<%= @log_path %>/<%= @name %>-logstash.log\", \
 \"@tags\":[\"<%= @host %>\"<% @tags.each do |tag| %>,\"<%= tag %>\"<% end %>], \
 \"@message\": \"%h %l %u %t \\\"%r\\\" %>s %b\", \
 \"@fields\": { \
   \"timestamp\": \"%{%Y-%m-%dT%H:%M:%S%z}t\", \
   \"clientip\": \"%a\", \
   \"duration\": %D, \
   \"status\": %>s, \
   \"request\": \"%U%q\", \
   \"urlpath\": \"%U\", \
   \"urlquery\": \"%q\", \
   \"method\": \"%m\", \
   \"port\": %p, \
   \"bytes\": %B, \
   \"vhost\": \"%v\", \
   \"referer\": \"%{Referer}i\", \
   \"user-agent\": \"%{User-agent}i\", \
   \"x-forwarded-for\": \"%{X-Forwarded-For}i\", \
   \"cookie\": \"%{Cookie}i\" \
 } \
}" <%= @name %>_logstash_apache_json