logstash收集Nginx日志，转换为JSON格式

Nginx日志处理为JSON格式，并放置在http区块：

 1  log_format  json  '{"@timestamp":"$time_iso8601",'
 2                       '"@version":"1",'
 3                       '"client":"$remote_addr",'
 4                       '"url":"$uri",'
 5                       '"status":"$status",'
 6                       '"domain":"$host",'
 7                       '"host":"$server_addr",'
 8                       '"size":"$body_bytes_sent",'
 9                       '"responsentime":"$request_time",'
10                       '"referer":"$http_referer",'
11                       '"useragent":"$http_user_agent"'
12                        '}';
13 access_log  logs/access_json.log  json;

Nginx日志格式