日志聚合和可视化: https://www.jianshu.com/p/bcf0445a1b8f?utm_campaign=haruki
Linux通过Rsyslog搭建集中日志服务器:https://blog.51cto.com/liqingbiao/2119953
How to Setup Rsyslog Server on Ubuntu 18.04 LTS: https://www.howtoforge.com/how-to-setup-rsyslog-server-on-ubuntu-1804/