Luke Hebert
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Welcome to the articles section, where business, technology, and everyday problem-solving meet. You’ll find practical how-tos, troubleshooting notes from the trenches, and the occasional take on whatever’s happening in the world. Some posts will save you time, some will spark ideas, and a few will just be me thinking out loud. Grab a coffee and dig in.

firewalld Quick Reference August 21, 2025

firewalld Quick Reference

A practical cheat sheet for managing firewalld on RHEL, Fedora, and CentOS systems. Covers zones, services, ports, rich rules, NAT, and direct iptables-style rules.
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Installing Kubernetes the Hard Way August 21, 2025

Installing Kubernetes the Hard Way

A guide to building a Kubernetes cluster manually, component by component, without kubeadm or minikube. This approach provides a deep understanding of how Kubernetes works under the hood and prepares you for both certification exams and day-to-day operations.
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CNI Plugin Binaries and Configs August 19, 2025

CNI Plugin Binaries and Configs

Catalogs the active Flannel CNI configuration and the full set of 19 available CNI plugin binaries on a Kubernetes node. Provides file sizes, modification dates, and the purpose of each installed plugin.
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CNIs and the CKA Exam August 19, 2025

CNIs and the CKA Exam

Clarifies which CNI plugins are acceptable for the CKA exam and explains why the official Kubernetes documentation avoids vendor-specific deployment commands.
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CoreDNS August 19, 2025

CoreDNS

Set up a dedicated server as a DNS server using CoreDNS, covering binary installation, server startup, and IP-to-hostname mapping via the hosts plugin. CoreDNS also supports extensibility through plugins, including one for Kubernetes.
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Gateway API August 19, 2025

Gateway API

Gateway API is a Kubernetes add-on that provides dynamic infrastructure provisioning and advanced traffic routing through an extensible, role-oriented configuration mechanism. It organizes traffic handling around three stable API kinds: GatewayClass, Gateway, and HTTPRoute.
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