Hardware... We all have it and we all have to "manage" it somehow (well, if you're working in IT, you have to 😜).
I like 19" hardware because those devices save a lot of space (i.e. expressed in square meters) and I have a lot of Cisco networking hardware plus a couple of servers and storage systems at home.
To manage the hardware of my lab, I'm using three open source tools, one of them is NetBox, which is a DCIM and IPAM (Data Center Information Management and IP Address management) tool. The screenshot below (some names are obfuscated due to OpSec reasons) shows how my 19" two-post frame looks like:
The second tool is Snipe-It, which is an ITAM (IT Asset Management) software, which allows me to track the inventory of my hardware (for OpSec reasons some information is obfuscated):
Last but not least I'm using as NMS (Network monitoring system) LibreNMS to get some nice graphs, information and alerts out of my hardware (OpSec-obfuscated):
All tools are active projects and have a really good online documentation. In my environment, each tool is running on a dedicated virtual machine based on Debian GNU/Linux:
* NetBox: 2 vCores, 2Gb RAM, 50Gb disk for OS, 50Gb disk for data
* Snipe-It: 2 vCores, 2Gb RAM, 50Gb disk for OS, 50Gb disk for data
* LibreNMS: 2 vCores, 4Gb RAM, 50Gb disk for OS, 300Gb disk for data
Note: Disk size is eventually oversized, but I have over 40Tb disk space available on my storage systems ¯\_(ツ)_/¯.