Lets talk about MySQL high availability (HA) and synchronous replication once more. Its part of a longer series on some high availability reference architecture solutions over geographically distributed areas. Part 1: Reference Architecture(s) for High Availability Solutions in Geographic Distributed Scenarios: Why Should I Care? Part 2: MySQL High Availability On-Premises: A Geographically Distributed Scenario The Problem [&]

https://www.percona.com/blog/2018/11/15/how-not-to-do-mysql-high-availability-geographic-node-distribution-with-galera-based-replication-misuse/