ProxySQL is a high performance, high availability, protocol aware proxy for MySQL and forks (like Percona Server and MariaDB). All the while getting the unlimited freedom that comes with a GPL license.
Its development is driven by the lack of open source proxies that provide high performance.
Source: sysown/proxysql: High-performance MySQL proxy with a GPL license.
Orchestrator changes the MySQL topology
In the case of a failover, Orchestrator changes the MySQL topology and promotes a new master. But who lets the application know about this change? This is where ProxySQL helps us.
מקור: Orchestrator and ProxySQL – Percona Database Performance Blog