Kubernetes at the Edge with K3s: A Production-Grade Setup Guide
HA K3s at the edge — embedded etcd vs external DB, overlay trade-offs, air-gap sync, upgrade path, and ARM64 specifics.
ArgoCD vs Flux for GitOps at Scale: An Architecture Decision Record
A full ADR comparing ArgoCD and Flux for multi-cluster GitOps — context, options, weighted criteria, consequences, and revisit triggers.
Kubernetes Network Policies: Egress Rules for RDS and External Services
How to write Kubernetes NetworkPolicies for pod-to-RDS egress — CIDR selectors, DNS resolution challenges, Calico vs Cilium, and production-ready YAML patterns.