Interactive course — how your data survives a cluster wipe

A guided, beginner-friendly walkthrough of the backup & restore story in this cluster. It follows one real app — Karakeep — from a git push through a full cluster wipe and back, showing the real manifests from this repo alongside plain-English explanations and animated diagrams. No Kubernetes experience needed.

• Start the course

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  9 short lessons · ~14 min. Learn what a PVC is, the one line (dataSourceRef) that makes data restore itself, how sync waves order the boot, what deliberately does NOT use this path (databases, exempt disks), and what actually happens when the cluster is rebuilt from nothing. Your progress is remembered — leave and come back any time.

  Open the course

How it works

Instructions on the left, the real file on the right — step through with Continue (or the arrow keys). The diagrams animate on their own; there's nothing to run or break.

Want the deep dive?

This course is the gentle on-ramp. For the full reference, see kopiur backup architecture and the storage architecture source-of-truth.