Logstash对Field进行简单数学计算

Logstash解析出Field以后, 可以使用filter的ruby插件进行简单数学计算/大小写转换等操作(官方介绍地址), 下面是配置

input {
  kafka{
    bootstrap_servers => ["www.hizy.net:6667,www.xpdo.net:6667","www.zhukun.net:6667"]
    client_id => "logstash_www.xpdo.net"
    group_id => "www.zhukun.net"
    auto_offset_reset => "latest"
    consumer_threads => 10
    decorate_events => false
    topics => ["www.zhukun.net"]
  }
}

filter {
    mutate {
        gsub =>["message",'\\"','"']
        gsub =>["message",'\\"','\\\\"']
    }
    json {
        source => "message"
        target => "aduser"
    }

    # 将[aduser][action][info][timestamp]映射为@timestamp
    # 需要注意的是, 即使是UNIX时间戳, 也有带毫秒和不带毫秒的, 可能是UNIX或者UNIX_MS
    date {
        match => [ "[aduser][action][info][timestamp]", "UNIX_MS" ]
        target => "@timestamp"
        locale => "cn"
    }

    # 如果这2个Field都存在, 则对它们进行相加, 形成一个新的Field
    if [aduser][action][param][vast][during_time] and [aduser][action][param][resource][during_time] {
        ruby {
            code => 'event.set("[aduser][action][param][vast_resource_during_time]", event.get("[aduser][action][param][vast][during_time]") + event.get("[aduser][action][param][resource][during_time]") )'
        }
    } else {
        drop  { }
    }
    mutate {
        remove_field => [ "message" ]
    }
}

output {
    stdout {
       codec => rubydebug {
    #       metadata => true
        }
    }
}

最后解析出来的样子是这样的

参考文档:
官方介绍地址
Simple Math Functions with Ruby in Logstash 5.3
Logstash中的数学函数