CKA Certification Course 2025 - Day 35: MASTER Kubernetes Authorization Modes & The Kubernetes API | CKA Course 2025

Day 35: MASTER Kubernetes Authorization Modes and Kubernetes API | CKA Course 2025 👉 GitHub Repository: https://github.com/CloudWithVarJosh/CKA-Certification-Course-2025 👉 CKA 2025 Playlist: https://youtube.com/playlist?list=PLmPit9IIdzwRjqD-l_sZBDdPlcSfKqpAt&si=1JNRkoNa75AOJx0o 📚 Welcome to Day 35! Today we’re diving deep into two critical pillars of Kubernetes: the Kubernetes API and authorization modes. We start by breaking down the Kubernetes API — the RESTful interface that powers every kubectl command and inter-component communication. You’ll learn what the Kubernetes API really is, how it's organized into core and named API groups, and how various components like the scheduler, kubelet, and controllers interact with it. Then, we shift gears to the authorization layer of Kubernetes. You’ll gain a clear, structured understanding of all supported authorization modes: RBAC, ABAC, Webhook, Node, and even the basic AlwaysAllow / AlwaysDeny. Most importantly, we show how these modes work together. Using real-world examples, you'll learn how Kubernetes processes a request through multiple authorization modes and how you can combine Webhook and RBAC for fine-grained, secure control. 📝 What We’ll Cover: ✅ What is the Kubernetes API (and how it powers your cluster) ✅ Understanding /api, /apis, and how components talk to the API server ✅ Core vs Named API groups and how apiVersion works ✅ Kubernetes authorization overview and flow ✅ Deep dive into RBAC, ABAC, Webhook, Node, AlwaysAllow, AlwaysDeny ✅ How to check and configure --authorization-mode ✅ Webhook-only vs Webhook+RBAC enforcement models ✅ Authorization flow combining Node, RBAC, and Webhook — with user Seema 💡 By the end of this lecture: You’ll have a solid mental model of how Kubernetes receives and processes API requests — from initial authentication to layered authorization. You’ll know how to build secure clusters using composable authorization logic, keeping your roles clean while enforcing real-world security policies. 🔗 Stay Connected: 👉 LinkedIn: https://linkedin.com/in/varun-joshi-2b516752 👉 GitHub: https://github.com/CloudWithVarJosh 💬 Got questions? Drop them in the comments — I’ll reply ASAP! 🔥 Don’t forget to like, share, and subscribe to stay updated with the CKA 2025 series! ⏰ Timestamps: 00:00:00 – Welcome & What to Expect 00:00:29 – Deep Dive: Kubernetes API Fundamentals 00:16:59 – Understanding API Groups: Core vs Named 00:25:13 – Authorization Modes Explained: RBAC, Node, Webhook & More 00:43:54 – CLI Walkthrough: Authorization Modes 00:51:18 – Real-World Scenarios: Node + Webhook + RBAC Interactions 00:55:59 – Outro & What’s Next 🔖 Hashtags: #Kubernetes #CKA #CloudWithVarJosh #KubernetesAPI #KubernetesAuthorization #RBAC #Webhook #NodeAuthorization #ABAC #KubernetesSecurity #AuthorizationModes #DevOps #CKACourse #CKA2025 #CKAExam #CKALecture #KubernetesMasterclass #ClusterSecurity #KubernetesAccess #APIArchitecture #AuthorizationFlow #SecureClusters