KubeCon + CloudNativeCon North America 2024

How do you upgrade your K8s clusters? Perhaps a rolling update of nodes, with services moving around? Can you guarantee a zero-downtime upgrade? Will this method scale and support the velocity of production environments? Likely not. But fear not - you are not alone! At Okta, we maintain hundreds of clusters, each hosting >130 services, with node counts ranging from 20-400 and we are updating them daily. How do we do it? Without an out-of-the-box solutions we had to build our own and we want to share what we learned with all of you! In this talk Kahou and Jeremy will go over the challenges and successes, highlighting how their deployment method provides the foundational blocks to build extra features while reducing the blast radius when something goes wrong - thanks to quick rollbacks and a canary rollouts. In this session attendees will learn how we leverage open source technologies to tackle three main problems: how to scale, how to secure and how to upgrade clusters with no downtime.