My friend and I have each bought an optiplex server. Our goal is to selfhost a web app (static html) with redundancy.
If my server goes down, his takes over and vice versa.
I’ve looked into Docker Swarm, but each server has to be totally independent (each runs its own apps, with a few shared ones).
I can’t find a solution that allows each server to take over and manage loadbalancing between the two.
Ideally with traefik, because that’s what we’re currently using.
To me the real issue is the DNS A record that point to only one IP :(
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That’s an interesting idea, need to check if they offer some kind of a API for that.
But then there is this other thing, what about dns cache?
Set the DNS cache time to 60 seconds.
Set the script to run on every host delayed by some time to avoid simultaneously accessing the API (e.g. run the script every other minute).
With this approach, you get automatic failover in at most 3 minutes.