admin, Author at ITNotes

Scaling Kubernetes Monitoring: My 6-Month Journey with the Prometheus Operator

April 30, 2026

A practical look at deploying the Prometheus Operator on Kubernetes. Discover how we moved from manual ConfigMaps to automated, label-based monitoring for 40+ microservices.

Networking

GNS3 on Ubuntu: Build a Pro-Grade Network Lab Without the Hardware Cost

April 30, 2026

Ditch the expensive hardware. This guide shows you how to install GNS3 on Ubuntu, tune it for peak performance using KVM, and bridge your virtual labs to the physical world.

Beyond Linear Chains: Building Production-Ready AI Agents with LangGraph

April 30, 2026

Ditch the spaghetti code. Learn how to use LangGraph to build resilient, stateful AI agents with built-in error handling and human-in-the-loop checkpoints.

Programming

Scaling Beyond REST: A Hands-on Guide to Redis Streams and Python

April 30, 2026

Tired of cascading timeouts in your microservices? Discover how Redis Streams and Python provide a lightweight, persistent alternative to Kafka for building reliable event-driven systems.

DevOps

Local Kubernetes: Why You Should Swap Minikube for kind or k3d

April 29, 2026

Ditch expensive cloud testing. Learn how to use kind and k3d to spin up local Kubernetes clusters in seconds, compare their performance, and automate your testing with GitHub Actions.

HomeLab

Stop Wasting Food: Self-Hosting Grocy on Docker for Smart Inventory

April 29, 2026

Tired of spoiled food and duplicate purchases? This guide shows you how to deploy Grocy on Docker, automate inventory with barcodes, and integrate it with Home Assistant.

Programming

Stop Breaking Your APIs: A Practical Guide to Consumer-Driven Contract Testing with Pact

April 29, 2026

Eliminate 'Integration Hell' and prevent API breaking changes. This guide shows you how to master Consumer-Driven Contract Testing using Pact and Node.js.

Security

Stop Trusting Tags: Secure Your Container Supply Chain with Cosign

April 29, 2026

Container tags are easily spoofed. Learn how to use Cosign and Sigstore to sign your images and protect your Kubernetes clusters from supply chain attacks.

Linux

Mastering Software RAID with mdadm: A Practical Guide to Linux Disk Redundancy

April 29, 2026

Don't let a drive failure take down your server. This guide shows you how to configure mdadm on Linux to create RAID 0, 1, 5, and 6 arrays for maximum uptime.