📰 Dev.to · david

The nfs-provisioner's root-mount volume was backing up the entire shared NFS export as one 33.4GB blob every night — redundant because every app's PVC was alrea

Vault is the trust root every ExternalSecret reads from. Its namespace had zero NetworkPolicies — any pod in the cluster could reach it. The investigation also

Two GiB wasn't enough, so I bumped to 3 GiB. Still OOMKilled. Bumped to 4 GiB. Still OOMKilled. The real fix wasn't memory at all — it was Terraform hash concur

Adding health probes to 20+ workloads taught me that kubelet sends the Pod IP as the Host header — and apps with host-validation reject it. Here's the full swee

Moving Atlantis from Kubernetes to a dedicated LXC involved repointing the Cloudflare Tunnel. The new tunnel pointed straight at the LXC's IP, bypassing Traefik

CloudNativePG's auto-generated PodMonitor was missing a single label — Prometheus never scraped it. The same I/O fragility that causes etcd timeouts was trigger

Why I replaced a heavyweight monitoring stack for host-level metrics with a single container, how Kyverno caught my first deploy before it hit production, and w

Redis running without a PVC still has persistence enabled by default. When it can't write RDB snapshots to a read-only rootfs, it doesn't crash — it silently re

Migrating Jellyfin off k3s onto a GPU-passthrough LXC meant pointing a Service at an external IP. The EndpointSlice looked completely correct via kubectl — Serv

Most teams alert when availability drops below a threshold. Burn-rate alerting tells you how fast you're spending your error budget — so you page on trajectory,

Two Raspberry Pis run DNS for an entire network with no one watching them most of the time. A hardware watchdog, fail2ban, an additive nftables host firewall th

Multiple rounds of 'reconstruct the firewall' work each added a fresh generation of rules without removing the old one. Because RouterOS evaluates rules in orde

Most Kubernetes clusters accept any container image, any privilege level, and any resource configuration by default. Kyverno lets you enforce policies at admiss

kubectl apply succeeds, the field reverts within seconds, and there's no error anywhere. Two ArgoCD debugging patterns that hit the same homelab three times in

Deploy a production-grade monitoring stack on bare-metal k3s: Prometheus, Loki with Garage S3 storage, Promtail on edge nodes via Ansible, SNMP monitoring for M

Replace MinIO with Garage — a single 50MB binary — as the Velero backup target. Full daily cluster backups with Longhorn volume snapshots, deployed via ArgoCD.

How to build a production-grade Kubernetes homelab with K3s, Authelia SSO, Longhorn storage, and ArgoCD — and the five painful mistakes that will cost you hours

Deploy Headscale on a bare-metal k3s cluster with Longhorn persistence, Traefik ingress, and Authelia OIDC authentication — fully GitOps-managed via ArgoCD.

How to get a real external IP on a bare-metal Kubernetes cluster using MetalLB L2 mode, and wire it up with Traefik for automatic HTTPS — fully GitOps-managed w

How to manage an entire Kubernetes homelab — MetalLB, Traefik, Longhorn, Authelia, and more — as a Git repository using ArgoCD's App-of-Apps pattern.

Learn how to enforce strict VLAN isolation, fast-track traffic, and build a default-deny firewall for MikroTik RouterOS using Infrastructure as Code.

A deep dive into architecting a Zero-Trust Let's Encrypt automation using Terraform, Azure Private Link, and VNet Integration.

A technical deep-dive into the network security requirements of NIS2 Article 21 and how to implement them in Azure using Terraform — with concrete code, not leg

How to automate wildcard Let's Encrypt certificates on a bare-metal K3s cluster using cert-manager's DNS-01 challenge with Cloudflare — and why HTTP-01 won't wo