Discover a pragmatic approach to upgrading Kubernetes clusters using a blue/green methodology in this 29-minute conference talk by Ricardo Aravena from Rakuten. Learn how to leverage open-source tools like Flux and Keiko to implement a GitOps approach for seamless version updates. Explore techniques for modifying manifests to support new APIs, enhancing upgrade security, and minimizing production downtime. Gain valuable insights into overcoming challenges associated with Kubernetes' rapid release cycle and evolving API landscape, enabling your organization to stay current with the latest features while maintaining system stability.