about the DNS load balancing and failover
Being reading this tutorial and wonder if I am understanding correctly, Please, can someone from DO confirm that?
It looks a very conventional solution. Whether it works or not purely depends on if digitalocean's DNS system does failover or not. can you confirm that?
Without this ability, DO's dns can have still have chance to send back dead reverse proxy's ip back to user, hence resulting in a no-responding/freezing web site or app.