I recently stumbled upon troubles 1 trying to run Docker on a fresh CentOS 8 install. Here my notes to spare your (and my) time:
We are going to locally build on a linux machine the Heartbleed checker wrote by https://github.com/FiloSottile (thank you!) in order to check for OpenSSL Heartbleed Bug CVE-2014-0160. Fire up your shell terminal and install golang package via aptitude or yum.
NagVis (http://www.nagvis.org/) is a visualization addon for Nagios/Icinga that permits to visualize the monitored information as objects placed on maps. I decided to use mk-livestatus (see: http://mathias-kettner.com) as backend because it is reported to offer better performances than ndo.