KubeDay Japan 2024

In this talk we will explore the complexities of managing stateful Kubernetes workloads in modern cloud environments. Maintaining state is crucial for many workloads, but existing application-layer solutions like Postgres's WAL or Cassandra's node replication only ensure data consistency - they don't prevent downtime when nodes go offline or are interrupted. To address these challenges, we introduce container state replication, a new approach that enables zero-downtime migrations for stateful workloads on Kubernetes. We will then introduce Architect, an open-source framework that can standardize live migration on Kubernetes. The session will feature a live demo showing Architect's ability to replicate and migrate stateful workloads on Kubernetes across continents without downtime or network disruption. Attendees will learn about the limitations of traditional application-layer replication solutions and how container state replication can enable true zero-downtime live migrations.