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.
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A round-robin setup is generally used as a simple method to distribute load and itself, allows you to distribute load among different servers but does not provide high availability. This is why in this tutorial a load balancer is then set up in each region. Any high availability setup will be dependent on your DNS servers responding. Our DNS services are proxied by CloudFlare allowing for high availability and low latency globally. If you want to provide an extra layer of redundancy you could create the same records with another DNS service and use both the DO and your other provider’s DNS servers for your domain.