Manual Kubernetes Cluster Upgrades with kOps

Running an outdated Kubernetes cluster exposes your applications to security vulnerabilities and deprives you of modern cloud-native features. Upgrading a live cluster can feel daunting, but mastering the manual upgrade path ensures you maintain complete control over your infrastructure. This text-based course guides you step-by-step through the entire manual upgrade process, ensuring your production workloads remain stable and online. You will transition from understanding core versioning concepts to executing zero-downtime rolling updates with confidence. What you'll learn: - Understand Kubernetes versioning schemes, release cycles, and API deprecations - Configure kOps cluster state files to target specific, stable Kubernetes releases - Generate upgrade previews to inspect planned infrastructure changes before applying them - Execute safe rolling updates on control plane and worker nodes to prevent service disruption - Implement modern observability practices to monitor cluster health during the migration - Troubleshoot common upgrade failures and perform safe rollbacks when necessary We start with the foundational concepts of Kubernetes architecture, release support windows, and pre-upgrade validation. From there, you will read through detailed, real-world scenario walkthroughs that show you exactly how to edit cluster configurations, preview changes, and perform sequential node updates. This course is designed for junior DevOps engineers, system administrators, and cloud beginners who want to learn cluster maintenance. No prior cluster upgrading experience is required, though a basic familiarity with command-line tools and Kubernetes concepts is helpful. Start reading today to master the art of safe, manual Kubernetes cluster administration.