Inside DigitalOcean's Reserved IP Rails migration

DigitalOcean recently overhauled its Reserved IP stack to address issues such as scaling and maintenance overhead. The legacy tech stack was replaced with two Go microservices that handle state management and user request handling separately, resulting in improved performance and scalability. The development process involved understanding the existing architecture, designing new code paths, implementing them, and testing before rolling out to production. The impact of this project included a significant decrease in response times, improved reliability and scalability, and increased developer productivity. Challenges faced during the migration included lack of documentation, need for an exhaustive test plan, capturing important metrics, and preserving existing APIs.