Materials by Omkar Shelke

Explore tutorials, challenges, courses, and more published by this author.

Challenges by Omkar Shelke

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Challenge

Node Is Ready, but Pods Won't Schedule

node-02 is back from a kernel upgrade but still shows Ready,SchedulingDisabled, and the Pods that can only run on it are stuck in Pending. Bring the node back into service and get the workload running, without touching the workload itself.

Challenge

Split a Deployment Evenly Across Two Zones

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.

Challenge

Migrate a Traefik Ingress to the Gateway API and Cut Traffic Over

The storefront APIs are served through a Traefik Ingress with TLS and two path rules. Reproduce that configuration with a Gateway and an HTTPRoute on the same hostname, cut traffic over to it, and retire the Ingress.

Challenge

Pick and Deploy the Least Permissive NetworkPolicy

The security team left five NetworkPolicy files on the workstation. Only one of them lets the frontend reach the backend while granting nothing more. Identify it and deploy it, unchanged.

Challenge

Debug a Pod Stuck at 0/1 Ready Due to a Readiness Probe

A new intern learning about probes wrote a small Pod manifest. The exec command and the application are both correct, but the Pod never becomes Ready because one probe parameter is missing. Find it and add it.

Playgrounds by Omkar Shelke

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Playground on  Programming

Rust Programming

A disposable Rust development environment with stable, beta, and nightly toolchains, bacon, cargo-nextest, rustfmt, clippy, rust-analyzer, and the musl target pre-installed.