Apr 27
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🚀 Kubernetes Mastery – Lesson 2-2: Upgrading a Kubernetes Cluster with kubeadm In this lesson, you’ll learn how to safely upgrade a Kubernetes cluster using kubeadm. We’ll walk through the methodical process of upgrading control plane and worker nodes step by step while maintaining cluster stability and minimizing disruption. Building a cluster is only the beginning — maintaining it properly is what makes you a real cluster administrator. This video is part of our complete Kubernetes learning journey, designed for: • Kubernetes beginners • Cloud & DevOps engineers • CKA (Certified Kubernetes Administrator) exam candidates ━━━━━━━━━━━━━━━━━━ 📘 Course Structure This course consists of 8 structured lessons, each starting with a conceptual introduction followed by focused, hands-on videos. In Certified Kubernetes Administrator – Kubernetes Mastery: From Cluster Setup to Troubleshooting, you’ll learn how to: • Build and configure Kubernetes clusters from scratch • Manage workloads, Deployments, Pods, and core configurations • Master scheduling rules, node affinities, and automation tools • Expose applications using Services and Ingress • Configure storage and persistent volumes • Debug, troubleshoot, and fix real-world Kubernetes issues Through practical explanations and real-world architecture thinking, you’ll gain the confidence to operate production-ready clusters. ━━━━━━━━━━━━━━━━━━ 📚 Learning Agenda (This Video) Core Upgrade Principles: • Why etcd backup must always come first • The golden rule: upgrade one minor version at a time • Upgrade order: control plane first, worker nodes second Upgrading the Control Plane: • Upgrading kubeadm • Running kubeadm upgrade plan • Applying the upgrade safely • Draining and uncordoning nodes • Upgrading kubelet and kubectl Upgrading Worker Nodes: • Running kubeadm upgrade node • Draining workloads properly • Completing a rolling upgrade process Outcome: • Successfully performing a safe, rolling cluster upgrade • Understanding the operational mindset required for production clusters ━━━━━━━━━━━━━━━━━━ 🧠 Want structured learning, PDFs & support? This YouTube series is part of a larger learning experience. On our learning platform, you’ll get: • Structured lesson flow • Downloadable PDF materials • Support questions & quizzes 👉 Full course & materials: https://learn.darumatic.com/courses/kubernetes-mastery-from-cluster-setup-to-troubleshooting/ ━━━━━━━━━━━━━━━━━━ 🏢 About Darumatic Darumatic is a cloud-native consultancy helping teams design, build, and operate modern cloud platforms with confidence. 🌐 https://darumatic.com/ ━━━━━━━━━━━━━━━━━━ 👍 If this helped you: • Like the video • Subscribe for upcoming lessons • Share with someone learning Kubernetes