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I am trying to setup HA PostgreSQL in k3s on a bare metal VM. I think this tool https://github.com/zalando/postgres-operator is relevant to what I'm trying to achieve, but I have absolutely no idea how to go ahead with this. Can someone pls point me to a tutorial of some sort that can act as a starting point? I just read about the CAP theorem and I dont have much idea about distributed databases.
Technically not postgres, but could be worth checking out cockroach db, it can use any postgres driver from programming languages and is build for distribution. I recently moved from postgres to cockroach (with golang postgres driver) and didnt need to change a single query