Logstash grok正则调试

1.为Logstash添加一个配置文件dnsquery.conf，如下

input {
  kafka {
    add_field => { "es_index_name" => "dns-query" }
    bootstrap_servers => "10.0.8.1:9092"
    topics  => "dns-query"
    consumer_threads => 9
    codec => json {
        charset => "UTF-8"
    }
  }
}

filter {
    if [es_index_name] == "ex-iis" {
        grok {
            match => { "message" => "%{DATA:date_time}\s*%{IPV4:s_ip}\s*%{WORD:cs_method}\s*%{URIPATH:cs_uri_stem}\s*(?<cs_uri_query>([=-_;&\S+]*))\s*%{BASE10NUM:s_port}\s*(?<cs_username>([.\S+]*))\s*%{IPV4:c_ip}\s*(?<cs_user_agent>([=-_;&/\S+]*))\s*(?<cs_referer>([=-_;&/\S+]*))\s*%{BASE10NUM:cs_status}\s*%{BASE10NUM:cs_substatus}\s*%{BASE10NUM:cs_win32_status}\s*%{BASE10NUM:time_taken}" }
    }
        mutate {    
            remove_field => ["agent.ephemeral_id", "agent.id", "_score", "_id", "agent.type",  "agent.version", "log.offset"]
            remove_field => ["message"]
    }
    }

    else if [es_index_name] == "dns-query" {     
        grok {         
            match => { "message" => "(?<date_time>\d{4}/\d{1,2}/\d{1,2}\s*[0-9:]{7,8})\s*(?<ThreatID>[0-9A-Za-z]{4})\s*%{NOTSPACE:Context}\s*(?<PacketId>\S+)\s*%{NOTSPACE:UDPTCP}\s*%{NOTSPACE:SendReceive}\s*%{IP:ClientIP}\s*(?<Xid>\S+)\s*(?<QR>\S+)\s*(?<Opcode>\S+)\s*(?<Flags>(\[.*?\]))\s*(?<ResponseCode>\S+)\s*(?<QueryContent>\S+)" }
     }
        mutate {    
            gsub => ["QueryContent","\(.*?\)",".","QueryContent","^.","","QueryContent",".$",""]  #多次替换，先替换所有小括号为点，然后替换开头的点为空，再替换结尾的点为空
            remove_field => ["agent.ephemeral_id", "agent.id", "_score", "_id", "agent.type",  "agent.version", "log.offset"]
            remove_field => ["message"]
     }
     } 


    else {
        mutate {
            remove_field => ["beat", "@version"]
        }
    }
}

output {
  # 调试控制台输出
   stdout { codec => rubydebug { metadata => true } }
}

2. 启动一个logstash进程，指定该配置文件 /usr/local/logstash/bin/logstash -f /usr/local/logstash/config/dnsquery.conf ，在前台运行

3.客户端正常收集到日志后，logstash前台会有日志显示

grok正则调试：