Apr 30
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Struggling with kubectl not working or API Server down issues in Kubernetes? In this hands-on tutorial, you’ll learn how to debug Kubernetes like a real system administrator by exploring control plane internals, static pods, and kubelet behavior when the cluster breaks. This video focuses on real-world troubleshooting using kubeadm setup, showing how Kubernetes components run behind the scenes and how to recover when things go wrong. ✔️ Understand why kubectl fails when API Server is down 🔥 Learn how control plane components run as static pods ✔️ Explore /etc/kubernetes/manifests (real cluster configs) 🔥 See how kubelet acts as a watchdog and auto-recovers components ✔️ Debug Kubernetes without kubectl using crictl 🔥 Analyze kubelet logs using journalctl ✔️ Inspect kube-apiserver YAML configuration (critical flags) 🔥 Understand etcd data directory and cluster state storage ✔️ Real-world troubleshooting for Kubernetes admins & DevOps engineers 📌 Watch the Full Kubeadm Labs Playlist: If you want to continue learning and building real multi-node Kubernetes clusters, check out our full playlist: [https://www.youtube.com/playlist?list=PL4y5PiOmBnA8-pXEE3Xwz28_QF-geOurS] 📌 Commands Used in This Video: ssh control-plane-node cd /etc/kubernetes/manifests kubectl get nodes kubectl get pods -n kube-system sudo crictl ps sudo crictl ps -a sudo mv /etc/kubernetes/manifests/kube-apiserver.yaml /tmp/ sudo mv /tmp/kube-apiserver.yaml /etc/kubernetes/manifests/ systemctl status kubelet journalctl -u kubelet -f journalctl -u kubelet -n 20 sudo crictl logs container-id sudo cat /etc/kubernetes/manifests/kube-apiserver.yaml sudo ls /var/lib/etcd ☸️ Kubernetes Control Plane Deep Dive Chapters 0:00 - 🎯 Intro: Control Plane Overview 0:32 - ⚠️ The "Cluster Is Down" Scenario 1:24 - 🔄 Control Plane Components Recap 1:57 - 🏗️ Static Pods vs. Normal Pods 3:08 - 📦 Understanding Static Pods 4:06 - 📁 The /etc/kubernetes/manifests Directory 5:03 - 👁️ How Kubelet Manages Components 6:08 - 🧠 API Server & etcd Relationship 6:56 - 🔗 Internal Communication Flow 7:49 - 🛠️ Common Failure Points 8:53 - 🧪 Demo Overview 10:08 - 💻 Terminal: Locating Control Plane Manifests 11:49 - 💥 Simulating Failure (API Server Down) 13:05 - 🔍 Debugging with Kubelet & CRI-CTL 14:42 - 🔄 Restoring Manifests & Recovery 15:44 - 📖 Analyzing API Server Configurations 17:01 - 💾 etcd Data & Local Storage 18:01 - 🏁 Summary & Best Practices 👉 Subscribe for more real-world Kubernetes, DevOps, and troubleshooting tutorials 🚀 #Kubernetes #DevOps #kubectl #Kubeadm #Containerd