Referencias
https://blog.sleeplessbeastie.eu/2018/01/15/how-to-install-icinga2-and-icingaweb2/
https://icinga.com/docs/icinga2/latest/doc/01-about/#!/icinga2/latest/doc/module/icinga2/chapter/getting-started
https://icinga.com/docs/icinga2/latest/doc/06-distributed-monitoring/
https://www.howtoforge.com/how-to-install-icinga-2-on-debian-10/#access-icinga-web
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https://medium.com/@Alibaba_Cloud/how-to-install-and-configure-icinga2-monitoring-tool-on-ubuntu-16-04-a582e949dd40