Focused, hands-on DevOps and server-side problems with hints, feedback, and automated solution checks.
A storefront needs eight replicas, and the platform team wants them split down the middle between the two availability zones. An uneven split must be refused by the scheduler rather than quietly tolerated.
Update a production NGINX ConfigMap to restrict TLS to v1.3 only, then verify the change enforces the security policy.
A Deployment is using a disk-backed emptyDir volume. Convert it to a memory-backed tmpfs volume for better performance — but make sure to set a size limit to prevent the Pod from exhausting the node's RAM.
Troubleshoot a Deployment where containers are repeatedly OOMKilled. Inspect Vertical Pod Autoscaler (VPA) recommendations and manually apply the recommended memory request and memory limit to stabilize the workload.
Update container images, container names, update strategy, and replica count in an existing multi-container Kubernetes Deployment.
Identify and fix deprecated API versions in a Kubernetes manifest using the kubectl-convert plugin, then deploy the updated manifest.
Create a Deployment with specific scheduling, labels, and port configuration, then expose it externally using a NodePort Service.
Update a Deployment with a new image using a rolling update strategy, then roll back to the previous revision and verify the rollout history.
Convert an existing Pod manifest into a Deployment and move the hardcoded environment variables into a Kubernetes Secret.
Practice static storage provisioning in Kubernetes by creating a PersistentVolume backed by hostPath, binding it to a PersistentVolumeClaim, and mounting it in a Deployment — a core CKAD skill for storage management.