Tutorials, challenges, courses, skill paths, playgrounds, and more — search the whole library in one place.
A payment service subscribes to payment requests through NATS. Run the checkout team's test script as a Job in the checkout namespace, with the required settings, and make sure the payment request arrives.
A freshly rolled out Deployment has its Pods stuck in ImagePullBackOff, and the catalog page it serves returns 503. Read what the cluster reports about the failed pulls, find out why the image does not pull, and get the Pods running.
A railway app publishes two endpoints through an Ingress, and both return 503. Find out why and make both endpoints answer again.
An nginx Deployment runs fine, but its address returns an error. Trace the path from the Ingress to the Pod and fix the manifests.
Six hands-on challenges covering every Kubernetes workload resource. Build Pods, ReplicaSets, Deployments, DaemonSets, StatefulSets, Jobs, and CronJobs by hand and understand the ownership chains that connect them.
Four hands-on challenges covering the full storage stack. Start with emptyDir, move to dynamic provisioning with StorageClass, explore static PV binding patterns including label selectors, bidirectional claimRef, and topology-aware local volumes, then finish with PV reclaim policies and data recovery.
Nine hands-on challenges split into two sections. The resource section covers how requests, QoS classes, priority, and namespace quotas shape scheduling decisions. The placement section covers how affinity, topology spread, and dedicated nodes control where pods land. HPA closes the path by showing how requests drive autoscaling.
Fast, repeatable Docker and kubectl exercises for local images and containers, tags, registries, image archives, and private images in Kubernetes.
Fast, repeatable Docker exercises for Dockerfile instructions, multi-stage builds, and build options.
Fast, repeatable kubectl exercises for environment variables, ConfigMaps, Secrets, and the Downward API.
Fast, repeatable kubectl exercises for Pod volumes, PersistentVolumes, claims, and StorageClasses.
