served from a 4-node bare-metal k3s cluster · exposed via Cloudflare Tunnel

Cédric Schippers

Software engineering student building toward DevOps by running real infrastructure, breaking it, and writing down what the failures taught me.

HBO ICT Software Engineering, Amsterdam · seeking a DevOps internship from February 2027

Case studies

Incident writeups from my homelab: what broke, how I found the root cause, and what I would do differently. Written in post-mortem format.

networking kubernetes iptables

A VPN sidecar that cut two nodes off the internet

How a container's kill-switch firewall escaped its pod and locked down the physical node — twice in one evening — and what that taught me about blast radius.
kubernetes scheduling storage

The day my control plane stopped accepting writes

Reads worked, writes hung. Tracing k3s write timeouts to workloads I'd let land on the control plane — and recovering from the reboot that followed.
networking kubernetes tcpdump

A game server that answered every ping with a broken reply

Proving a fault was an upstream server regression, not my network, by capturing packets at the right layer — then working around it with a protocol-level fix in a UDP relay.

*my production: a cluster my household actually depends on.