How Kubernetes Network Policies Create Silent Outages
DevOps Daily with Fexingo: CI/CD, Kubernetes, and Modern Software Operations · 2026-06-16 · 9 min
Episode notes
Lucas and Luna dig into a specific Kubernetes failure pattern that most teams discover the hard way: network policies that block healthy traffic after a rollout. They walk through a real incident at a mid-size fintech company where a seemingly innocuous deny-all ingress policy took down payment processing for 47 minutes. Lucas explains how Kubernetes NetworkPolicy objects are evaluated, why default-deny patterns can backfire, and why teams should use audit-mode logging before enforcing. Luna shares a pragmatic checklist for testing network policies in staging. They close with the one label selector rule every DevOps engineer should memorize before their next production deploy. A solid episode for anyone running Kubernetes beyond a hobby cluster. #Kubernetes #NetworkPolicy #DevOps #ProductionIncident #Fintech #PodNetworking #CNI #Calico #Cilium #DefaultDeny #LabelSelector #SilentOutage #InfrastructureAsCode #CloudNative #Technology #FexingoBusiness #BusinessPodcast #TechOps Keep every episode free: buymeacoffee.com/fexingo