Apache2 logging config to output JSON in Logstash json_event format

apache2-logstash

# Create a log format called 'logstash_json' that emits, in json, the parts of an http
# request I care about. For more details on the features of the 'LogFormat'
# directive, see the apache docs:
# http://httpd.apache.org/docs/2.2/mod/mod_log_config.html#formats
# http://cookbook.logstash.net/recipes/apache-json-logs/
LogFormat "{ \"@timestamp\": \"%{%Y-%m-%dT%H:%M:%S%z}t\", \"@message\": \"%m %H %U%q %s\", \"@fields\": { \"client\": \"%a\", \"duration_usec\": %D, \"status\": %s, \"request\": \"%U%q\", \"method\": \"%m\", \"protocol\": \"%H\", \"referrer\": \"%{Referer}i\", \"user-agent\": \"%{User-agent}i\" } }" logstash_json

# Apache 2.4 adds sub-second precision logging
# http://httpd.apache.org/docs/2.4/mod/mod_log_config.html#formats
# LogFormat "{ \"@timestamp\": \"%{%Y-%m-%dT%H:%M:%S}t.%{msec_frac}t%{%z}t\", \"@message\": \"%m %H %U%q %s\", \"@fields\": { \"client\": \"%a\", \"duration_usec\": %D, \"status\": %s, \"request\": \"%U%q\", \"method\": \"%m\", \"protocol\": \"%H\", \"referrer\": \"%{Referer}i\", \"user-agent\": \"%{User-agent}i\" } }" logstash_json