* 1 computer will eventually break (or one service will crash, or be replaced). To keep processing requests, you need more than 1 computer.

* Two-or-more computers can be fed conflicting information.

* Consensus algorithms prevent such conflicts from being accepted by the system.

* Raft is one such algorithm. It operates by choosing a leader and then routing all requests via that leader, so that no observers will see a different sequence of requests.

You need to at least try.