https://www.unixmen.com/install-and-configure-rsyslog-in-centos-6-4-rhel-6-4/
https://forum.mikrotik.com/viewtopic.php?t=83385
https://devopsideas.com/centralized-logging-using-graylog/
https://javatechonline.com/how-to-monitor-spring-boot-microservices-using-elk-stack/?fbclid=IwAR0woWfbQ3JP4H4WQrPmP292_RXUi3SMQ8EA41MPOOgfSCyP9hgopoYcn3U&=1
https://www.youtube.com/channel/UCG5B6oQWWsIt-yO826IwG2Q