Jendrik Brack

Hello — I’m Jendrik. I work as a DevOps engineer with a systems-administration background and have about ten years of experience in cloud and on‑prem infrastructure, Infrastructure-as‑Code (IaC), and automation.

My focus areas include Azure, Kubernetes, Terraform, CI/CD pipelines, and improving the developer experience through pragmatic automation. In my posts I share practical recipes, tools, and approaches that help teams deliver more reliably and faster.

Technically, I enjoy working with .NET, PowerShell, Hugo, and common CI/CD tools; I’m always focused on repeatable deployments, clean builds, and pragmatic operational automation.

If you have topic suggestions or want to discuss collaboration, feel free to contact me via the project page or by e‑mail.

Published blogs

AKS at Scale: Hard-Won Lessons from 1000+ Node Clusters

Running AKS at 1,000+ nodes exposes hard limits in etcd, networking, observability, and cost that never appear in vendor documentation. This article shares operational lessons from mega-cluster deployments: where the scaling cliffs are and how to plan around them before production outages force your hand.

Hybrid AKS: Bridging Cloud and On-Prem with Azure Arc

Most organizations run Kubernetes across cloud and on-prem simultaneously. This article covers practical patterns for hybrid AKS: ExpressRoute and VPN connectivity, Azure Arc for unified management, consistent policy enforcement, DNS resolution, and identity federation without duplicating systems.

AKS Disaster Recovery: Why Your Untested Backup Will Fail

Your cluster will fail. The question is not if, but when, and whether you can recover before customers notice. Most organizations discover their backup strategy does not work during an actual outage, when recovery time matters most and manual heroics cannot save you.

If you run Azure Kubernetes Service (AKS) in production, you need a recovery plan that engineers can execute half asleep at 2 AM. We will go through what to back up, how Velero works in day-to-day operations, when Azure Backup for AKS is enough, and how to design realistic failover with measurable Recovery Time Objective (RTO) and Recovery Point Objective (RPO).

The goal is simple: repeatable recovery procedures you have already tested, not a document that looks good in Confluence but fails during an incident.

Container Registry & Image Security in AKS Deployments

Securing Azure Container Registry for AKS needs more than a single control. This guide walks through a production-ready sequence: vulnerability scanning, image signing, RBAC, private endpoints, policy enforcement, and geo-replication. You get practical Terraform, Kubernetes, and pipeline patterns, plus clear trade-offs for real-world operations.

Multi-AKS Cluster Networking & Hub-Spoke Topology

Running more than one AKS cluster changes networking from a setup task into an operating model. This guide covers practical connectivity patterns, hub-spoke routing, cross-cluster DNS, ingress options, and decision criteria that help teams scale safely without adding complexity too early.