I have been searching for while now for goed software to document my network setup. I would like to document my servers, containers, network flow, possibly als store some config files. Also would be nice if it has some auto discovery on my network.
As said, I’ve been through a lot, but never found the tool that I liked. Netbox is nice, but lacks a graphical base. Several tools are just drawing tools that lack auto discovery of the network and seem hard to maintain in the future and can not hold extra information. Same goes for some unl based stuff.
Netbox is a good start if you can deal with the device-front port-rear port-rear port-front port-device horseshittery. For auto discovery I would look at LibreNMS it pulls data from LLDP, CDP, and Mac tables to map out a network.
I would look for something that can generate your diagram from text. There are several.
Also you should probably have some kind orchestration layer so that your architecture as text feeds both diagram and operational automation (say, ansible).
The hard part with diagrams is keeping it up to date. So if you can generate a diagram from something that MUST be up to date, it’s a 2-fer (or if your diagram can be used to generate say an ansible inventory).