Kube Learn

Learn Kubernetes the way SREs do: by fixing what's broken. KubeLearn puts you on call. A pod is crash-looping, a node went NotReady, an alert never fired, and it's your job to find the root cause and fix it. Read realistic kubectl output, type the commands you'd use at work, fix the YAML until the cluster is healthy again, then read the post-mortem. A NEW PAGE EVERY DAY • Today's page: a fresh incident waits for you every day • Keep your streak alive and climb the ranks, from Trainee to Principal SRE 26 REALISTIC INCIDENTS • Type real commands. Aliases like "k get po -A" and "deploy/web" work too • Fix broken manifests and Dockerfiles in a built-in editor • Smart feedback points you in the right direction without giving the answer away • Hints when you're stuck, and the answer after two tries • A post-mortem after every incident: what went wrong and how to prevent it Four tracks, all seen through running Kubernetes in production: • Kubernetes: CrashLoopBackOff, ImagePullBackOff, 503s from the Ingress, volumes stuck in Pending, RBAC errors, bad releases, OOMKilled pods, traffic spikes • Linux: a node NotReady after maintenance, evicted pods everywhere, workers that vanish silently, cluster-wide DNS outages • Docker: an image built on a Mac, one flag that broke everything, "no root" security rules, 502s on every deploy • Grafana & Prometheus: dashboards that say "No data", the alert that never fired, a disk full in 24 hours 25 FOCUSED LESSONS Short lessons with examples and a quiz for each. Answers are shuffled every time, so you learn the material, not the positions. • Kubernetes: Pods, Deployments, Services, ConfigMaps & Secrets, health checks, resources & scheduling, storage, Ingress & DNS, RBAC, a troubleshooting playbook • Linux: processes & signals, namespaces & cgroups, systemd & kubelet, disks & eviction, networking & DNS tools • Docker: images & registries, Dockerfiles for Kubernetes, Docker vs containerd, reproducing problems locally • Grafana: the monitoring stack, PromQL, dashboards & logs, alerting YOUR OWN AI TUTOR, FREE AND PRIVATE On iPhones with Apple Intelligence, ask questions about any lesson, get any section re-explained in simple words, and ask why a quiz answer was right or wrong. It runs entirely on your device: nothing you type ever leaves your phone. GREAT FOR • Developers starting with Kubernetes • DevOps and SRE engineers sharpening their troubleshooting • Preparing for CKA / CKAD exams and on-call interviews PRIVATE AND OFFLINE No account, no ads, no tracking. Everything works offline, and your progress stays on your device. Kubernetes is a registered trademark of The Linux Foundation. KubeLearn is an independent learning app and is not affiliated with or endorsed by The Linux Foundation or the CNCF.