产品试用申请
默认终端登录密码 root/default
默认网页登录信息 admin/admin
logstash添加user agent插件
https://www.cnblogs.com/minseo/p/9183956.html
GeoIP 数据库下载
logstash添加geoip支持：https://www.elastic.co/guide/en/logstash-versioned-plugins/current/v6.0.0-plugins-filters-geoip.html#_details_405
教程：https://dev.maxmind.com/geoip/geoipupdate/
https://github.com/maxmind/geoipupdate