Kubernetes on CyFunhttps://cyfun.dev/tags/kubernetes/Recent content in Kubernetes on CyFunHugo -- gohugo.ioen-usMon, 05 Oct 2026 00:00:00 +0000The Terminal Could Delete Its Own Firewallhttps://cyfun.dev/blog/terminal-could-delete-its-own-firewall/Mon, 05 Oct 2026 00:00:00 +0000https://cyfun.dev/blog/terminal-could-delete-its-own-firewall/Per-player browser terminals next to CTF target VMs, confined by an nftables fence each pod applies to itself.Our Dev Cleanup Job Deleted 28 Production Labshttps://cyfun.dev/blog/dev-cleanup-job-deleted-production-labs/Tue, 08 Sep 2026 00:00:00 +0000https://cyfun.dev/blog/dev-cleanup-job-deleted-production-labs/A Kubernetes orphan-cleanup job that treated "no row in my database" as permission to delete, and the three production bugs that came from it.Our VMs Needed an Empty File, Not More CPUhttps://cyfun.dev/blog/empty-file-not-more-cpu/Thu, 30 Jul 2026 00:00:00 +0000https://cyfun.dev/blog/empty-file-not-more-cpu/Running deliberately vulnerable VMs, each with its own k3s cluster inside, as on-demand CTF labs on GKE with KubeVirt and CDI.