The DigitalOcean team has been using an open-source project called Cluster API to provide a managed Kubernetes service since 2019. The team's infrastructure underwent significant changes, particularly with the introduction of a new Containerized Control Plane (CCP) architecture in 2021. This change was made possible by combining Cluster API with "DigitalOcean's scrappy magic" to create a scalable and fault-tolerant managed Kubernetes service. By using Cluster API, DigitalOcean simplified the complexities of provisioning new Kubernetes clusters and providing structure for ongoing maintenance and upgrades. The team also leveraged Kubernetes in Kubernetes, which allowed them to take care of scalability and fault tolerance without additional logic or human intervention. This approach enabled flexibility for customers, making it possible to offer high availability and horizontal scaling with minimal effort. However, the team also faced challenges, such as networking complexities and the need to enforce a positive security model for multi-tenanted clusters. Ultimately, the change was successful, and DigitalOcean is excited to continue delivering more features in future, having taken a step back to develop a bold new approach.