Daily DevOps & .NET - Where Code Meets Culture

Observability in AKS CNI Overlay: When Pod IPs Hide Behind Nodes

Published on 2/18/26 5:00 pm by Jendrik Brack

CNI Overlay masks pod IPs behind node IPs through SNAT, breaking traditional observability. Network logs show nodes, application logs show pods. Without Container Insights, correlation IDs, and distributed tracing, you’re debugging blind. SNAT port exhaustion mimics network failures, and timestamp-based correlation is fragile. The cost of proper monitoring is trivial compared to debugging outbound connectivity at 3 AM without visibility.

Your Azure SQL Is Public Right Now. ISO 27017 Demands You Fix It

Published on 2/17/26 5:00 pm by Martin Stühmer

That SQL Server you deployed last week? Publicly accessible. That Storage Account? Same story. Azure defaults are security theater. ISO 27017 calls this a compliance violation, and your next audit will too. Stop trusting “cloud-native” to mean “secure” and start implementing VNets, Private Endpoints, and NSGs before your data becomes someone else’s problem.

Your Incident Response Plan Is a Lie. Here’s How to Fix It.

Published on 2/12/26 5:00 pm by Martin Stühmer

That incident response plan in your Confluence? Nobody reads it. The on-call engineer can’t find it. And when your production API is bleeding at 3 AM, you’ll improvise—badly. ISO 27001 A.16 doesn’t care about your documentation theater. It demands procedures that work. GitHub Actions turns incident response from compliance fiction into executable reality.

AKS Cost Optimization: Resource Governance That Actually Works

Published on 2/11/26 5:00 pm by Jendrik Brack

AKS costs are brutally simple: node sizing, pod density, workload sprawl, and reserved capacity. If you don’t have visibility and governance, your cloud bill will punch you in the face—usually when it’s too late to react without pain. I’ve watched teams scramble to cut costs after the invoice lands, breaking production in the process. This guide is for practitioners who want to avoid that mess. No theory, no vendor fluff: just what actually works to keep AKS costs under control without sacrificing reliability.

Stop Hoarding Personal Data in Entity Framework

Published on 2/10/26 5:00 pm by Martin Stühmer

The classic monolithic User entity—stuffed with birth dates, phone numbers, employment history, and marital status “just in case”—turns into a compliance nightmare the moment someone requests data deletion. You can’t delete without breaking referential integrity. You can’t keep the data without violating GDPR. You can’t anonymize without retaining fields that should never have existed. The solution isn’t complex: separate operational data from personal data, make consent-based fields nullable and purpose-documented, implement soft deletes with query filters, and validate your API boundaries with integration tests that fail when unnecessary fields leak through. Data minimization isn’t regulatory overhead—it’s architectural hygiene that makes your deletion logic straightforward and your audit responses honest.