There are several good MySQL-based Operators in the open-source world, made by Oracle, Presslabs, PlanetScale(Vitess), and Percona. Each of them has its unique architecture inside to guaranty minimal downtime and data loss during failover. Orchestration of MySQL on Kubernetes is a no way a straightforward process. Let's do deep dive into how Operators are working inside and what solution should be used in each particular case.