日志格式：
LogFormat "%{clientip}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" \"%{clientip}i.%{cookie}n\"" combined

日志实例：
183.60.150.34 - - [23/Jun/2017:17:57:52 +0800] "GET /jump/cps.jsp?projectcode=0085001&cid=A200647189%7c%7c0000&url=http%3a%2f%2fwww.mangocity.com HTTP/1.1" 302 - "http://myhenan.qq.com/t-7947749-1.htm" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.108 Safari/537.36 2345Explorer/8.6.1.15524" "183.60.150.34.10.10.130.100.1498211872045986"

logstash配置文件：
input {  
        file {  
                type => "www_access"  
                path => ["/usr/local/elk/elklog/apachelog/log0/www.mangocity.com-access_log","/usr/local/elk/elklog/apachelog/log1/www.mangocity.com-access_log"]  
        }
file {
                type => "ro_access"
                path => ["/usr/local/elk/elklog/apachelog/log0/ro.mangocity.com-access_log","/usr/local/elk/elklog/apachelog/log1/ro.mangocity.com-access_log"]
        }
}
filter {
  grok {
    match => {
      "message" => '(%{USER:clientip}|%{IPORHOST:clientip}|%{IPORHOST:clientip}, %{IPORHOST}) %{USER:ident} %{USER:auth} \[%{HTTPDATE:timestamp}\] "%{WORD:verb} %{DATA:request} HTTP/%{NUMBER:httpversion}" %{NUMBER:response:int} (?:-|%{NUMBER:bytes:int}) %{QS:referrer} %{QS:agent}'
    }
  }
  date {
    match => [ "timestamp", "dd/MMM/YYYY:HH:mm:ss Z" ]
    locale => en
  }
  geoip {
    source => "clientip"
  }
  useragent {
    source => "agent"
    target => "useragent"
  }
}
output {
        redis {  
                host => "10.10.45.200"  
                data_type => "list"  
                key => "elk_frontend_access:redis"  
                port=>"5379"  
        }  
}

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