Explore how to implement zero-downtime upgrades for stateful applications through this 31-minute conference talk from KubeCon + CloudNativeCon. Learn about the technical and project management challenges involved in achieving seamless upgrades for Keycloak, the leading open-source identity and access management solution, where maximum uptime is critical for dependent services. Discover the evolution of Keycloak's architecture to support zero-downtime rollouts of configuration changes and patch upgrades, including detailed insights into the Keycloak Operator, clustering compatibility strategies, comprehensive testing approaches, and future development plans. Gain practical best practices that you can apply to your own projects to enable continuous delivery of features and security patches without service interruption, addressing the complex challenges that stateful applications face compared to their stateless counterparts.