Focused hands-on problems designed to help you hone your DevOps or Server Side skills. Some challenges are more educational, while others are based on real-world scenarios. The platform provides hints and feedback for each challenge, including automated solution checks.
A Deployment is failing because application configuration is missing. Mount only specific keys from an existing ConfigMap as files inside the Pod at the correct path so the application can start successfully.
Observe the Delete and Retain reclaim policies in action, recover a Released PV by patching claimRef, and recover data by creating a new PV pointing to the same storage directory.
Explore how the DefaultStorageClass admission controller injects storage classes, explicitly name a StorageClass, switch the cluster default, and inspect where local-path stores volumes on the node.
Learn the three static PV binding patterns - generic match, label selector, and bidirectional claimRef - then use a no-provisioner StorageClass with WaitForFirstConsumer to pin storage to a specific node.
Add a sidecar container to an existing Deployment that tails a shared log file written by the main application container. Use a shared volume to make the log file available to both containers.
Create a PersistentVolumeClaim backed by a CSI StorageClass and run a storage performance benchmark using FIO inside a Kubernetes Job.
Create a Pod with a main application container and a sidecar container that continuously streams shared logs. Kubernetes implements sidecar containers as a special case of init containers.
A production deployment is stuck in Pending because its PersistentVolumeClaim and StorageClass are missing. Set up NFS-backed storage and watch all pods come alive and write shared data across nodes.
Scale deployments automatically based on CPU utilization - and see why resource requests are a prerequisite for HPA to work.
Use LimitRange to set per-pod resource defaults and ResourceQuota to cap total namespace consumption.
