At Shopify, we use a custom Ruby on Rails app to manage our massive MySQL fleet running on Kubernetes. We've turned one of the hardest infrastructure problems into a Rails development problem and it's paid off. We'll discuss why we built this tool, how it works, and how it helps us manage thousands of databases. We'll also discuss the challenges we faced and how we overcame them.

Topics we'll cover:
* Difficulty with stateful applications in Kubernetes
* Declarative Infrastructure as a Service
* How we use Rails to manage MySQL
* MySQL Clustering