Lets talk redundancy, controller, DNS, etc.
So I'm loving the Unifi hardware and software package. It does everything I want it to at a reasonable price, but I worry about redundancy and uptime.
Right now I'm using a Cloud Key as my controller and it works great, but I'm wondering what others are doing in the event the Cloud Key fails. Do you keep an extra one on hand in the event you need to replace it? Or do you keep an old PC/hardware on site ready to replace the controller?
I guess I'm having a hard time installing Unfi in a production environment as there is a single point of failure, the controller. How do you mitigate this issue?
Also, I'm using a pi-hole as my primary DNS and the USG as the secondary DNS. The pi-hole seems fine for my home network, but I worry about the scalability of the pi-hole when I add 50+ clients. How do you setup your DNS?
How do you make your Unifi sites redundant? What type of hardware/software failures have you experienced?