I really like the idea having Pi Hole be the DNS resolver for my network because it "automatically" covers the plethora of devices around the house all at once.
HOWEVER, I just know Murphy's Law will strike eventually: the Pi Hole will die when I'm away on a business trip and no one in my household will be able to fix the Pi Hole device, or login into the main router to set the DNS setting back to 22.214.171.124 to restore internet visibility until I get home to sort things out.
Hence, I ask the community: is there a good solution to automatically revert to "normal" DNS resolution if Pi Hole dies?
Can a router with Tomato or some other popular 3rd party OSS be set to periodically check Pi Hole's "health", and "revert" if the Pi Hole gets sick?
I have two BeagleBone Black Rev C's (BBB) running various home automation things. The point is that I plan to have one BBB run Pi Hole, and I could setup the other BBB to act as a watchdog over Pi Hole's health on BBB 1. As such, any recos for implementing such a watchdog scheme?