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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.
Challenges
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.
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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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Mount Static Assets from an OCI Image into a Kubernetes Pod
Use Kubernetes image volumes to mount a static HTML artifact into an nginx Pod without an init container or a custom nginx image.
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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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Diagnose and Resolve Stability Issues in a Go Application Deployment
This challenge focuses on debugging memory usage issues in a Go application deployed in a Kubernetes cluster. The goal is to ensure the application can handle moderate traffic without crashing, even when it runs with significantly constrained memory resources.
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Make a Kubernetes Pod Survive an OOM Event Without Restarting
Hack your way through this challenge making the OOM kills invisible again.
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Deploy a Resource-Greedy Pod Without Breaking the Kubernetes Cluster
Prove your SRE skills - deploy a resource-greedy application to a Kubernetes cluster and make it run for a while without disrupting the service.
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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?
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Copy Files To/From a Running Kubernetes Pod: a Simple Case
Practice copying files to/from running Kubernetes Pods to become a Kubernetes troubleshooting ninja.
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Edit a File in a Running Kubernetes Pod: a Tricky Case
Can you edit a file in a running Kubernetes pod? What if there is no shell inside and the container's user lacks the write permission?