Was about to say that we managed upwards of 4k servers worth of MySQL databases (as in 4k baremetal servers worth, not 4k small VMs each having a small MySQL) u

Was about to say that we managed upwards of 4k servers worth of MySQL databases (as in 4k baremetal servers worth, not 4k small VMs each having a small MySQL) using "Orchestrator" at Booking.com ten years ago. I checked if it was still kicking before writing this and found that the GitHub repo was archived last year. The next Google hit I find is this article from three days ago: https://www.percona.com/blog/orchestrator-for-managing-mysql-high-availability-using-raft/ https://www.percona.com/blog/orchestrator-for-managing-mysql... Please do some additional research into the state of maintenance of that piece of tech before jumping on it. But it certainly did a lot of powerful things for us back in the day. The automatic promotion of followers was key to our deployment.