Field notes

Field notes from infrastructure, security and automation work

Technical decisions, implementation notes and lessons worth keeping. Topics can overlap because real systems rarely stay inside one category.

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Case StudyInfrastructure Self-Hosting Cloud #Kubernetes #k3s #Platform engineering #Cloudflare Tunnel #Kustomize #Backup & recovery

What runs where on the shared Kubernetes platform

Map of four single-node k3s clusters: an apps cluster and a tooling cluster for UAT and for production, Cloudflare Tunnel into the apps clusters and private-network links to tooling

A working map of the platform behind this site: four single-node k3s clusters, how requests reach them, how their configuration lives in Git and where the backups go.

Orthrus IT10 August 2026