Focused, hands-on problems for sharpening your DevOps and server-side skills. Some teach specific concepts while others mirror real-world scenarios. Every challenge includes hints, feedback, and automated solution checks.
The production "Calendar Todo" web application has been deployed in the prod namespace but all pods are stuck in Pending. Investigate the cluster, identify why the application cannot run, fix the underlying node issue, and verify the app is serving traffic on NodePort 31777.
A Deployment is stuck with Pods in ContainerCreating state because the required ConfigMap was not created. Fix the issue to make the application accessible.
A web application is deployed but the website is not accessible. Investigate and fix the issue.
A deployment is failing because the application cannot load its TLS certificate. Create the missing secret and mount it into the deployment so the Flask app can serve TLS traffic.
A Pod is failing in the japan namespace. Investigate the issue, identify the root cause, and fix it to get the Pod running.
Two monitoring applications are failing due to missing RBAC permissions. Fix both by creating ServiceAccounts, Roles, and RoleBindings.
A Deployment is failing because its ServiceAccount lacks permissions to list pods. Fix the issue by binding an existing Role to the ServiceAccount.
Debug and fix a Pod that fails to deploy due to resource constraint violations in a namespace with ResourceQuota and LimitRange policies.