Hi, I will like to upgrade nagios from 4.1.1 to 4.3.1. We have a lot of custom plugin, commands, resources, nagios.cfg, cgi, eventhandler custom scripts, and scripts that change the notification to on-call staff per SQL database. I will like to keep all this custom features while done with the upgrade. What step do I need to take? Our nagios box is not connected to the internet to do wget, so will manually have to download and copy the source code to the box.
I have 1 production box, 1 backup box, and one dev box with same configuration so I can test the upgrade before actually doing it on production box.