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Edit a File in a Running Kubernetes Pod: a Non-Root Container Case
Learn how to edit a file in a running Kubernetes Pod when the container's user has no write access to it.
Challenges
Focused, hands-on DevOps and server-side problems with hints, feedback, and automated solution checks.
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Edit a File in a Running Kubernetes Pod: a Distroless Container Case
Learn how to edit a file in a distroless container that runs as a non-root user in a Kubernetes namespace that enforces the baseline Pod Security Standard.
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Identify the Source of Unexpected Requests in a Kubernetes Cluster
An internal service started receiving requests from unexpected IP addresses. Identify the unexpected sources and find out which workloads and teams are behind them.
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Access a Private Kubernetes API Server Through an SSH SOCKS Proxy
The production Kubernetes cluster lives inside a private VPC, and its API server has no public endpoint. Turn an SSH connection to the bastion host into a SOCKS proxy and teach kubectl to use it, so the cluster becomes manageable from your workstation.
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Copy Config Files from a Running Pod
by Omkar Shelke
A Deployment is running in the platform namespace with 3 replicas. Each pod has configuration files at /app/config/. Copy those files to /home/laborant/config/ on the local machine.
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Copy a File into a Running Pod to Serve a Custom NGINX Page
by Omkar Shelke
A Pod runs NGINX behind a NodePort Service. Copy an HTML page from dev-machine into the running Pod so NGINX serves it as the default page, without changing the Pod or the Service.
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Use kubectl-convert to Fix Deprecated APIs in a Kubernetes Manifest
by Omkar Shelke
Identify and fix deprecated API versions in a Kubernetes manifest using the kubectl-convert plugin, then deploy the updated manifest.
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Deploy a Pod with a Container Image from a Private Registry
Practice configuring Kubernetes to pull images from a private registry and run Pods with authenticated registry access.
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Kubernetes Pod Lifecycle Fundamentals
by Adithya G
Practice the fundamental lifecycle of a Kubernetes Pod: creation, inspection (IP, node), interaction (executing commands, checking logs), and deletion.
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Copy Files To/From a Running Kubernetes Pod: a Distroless Image Case
An ultimate Kubernetes troubleshooting challenge: can you copy files to/from a running Pod that doesn't have a shell or other command line tools installed?