Recent posts tagged cloud-computing

A calm, sequential guide for anyone entering the field. The article is divided into smaller chapters to make it easier to understand. This series grows out of the Cloud Computing labs I teach to fourth-year Computer Science students at the Universit...

> A beginner-friendly Kubernetes networking story about Gateway API, Services, HTTPRoutes, DNS, a few misleading errors, and the joy of finally seeing a successful response. The mission The goal of this exercise was simple to say and slightly less ...

How does a Kubernetes cluster actually work? I’ve been learning Kubernetes and realized that it’s easy to memorize terms like Control Plane, Worker Node, API Server, Scheduler, and kubelet without really understanding how they fit together. So I p...

Kubernetes can feel confusing when you first start learning it. Pods. Nodes. Services. Deployments. Scaling. There are so many new terms that it is easy to focus on memorizing definitions instead of understanding how everything connects. I recentl...

Or: How I Learned to Stop Worrying and Love the Dot-Notation The Setup: Two Nodes, One Mystery Picture this: you've just spun up a Kubernetes cluster on your laptop. You've got two nodes talking to each other: NAME STATUS ROLES ...

Imagine you're building a SaaS platform. Nothing unusual. A web application. A PostgreSQL database. A Redis cache. Everything runs in the cloud. The architecture looks something like this: Users ↓ Application Server ↓ PostgreSQL Simple. ...

Trust systems1 have long been a contentious topic in cloud computing. Standard cloud models operate on a passive assumption that you trust your cloud provider and you trust the underlying host OS, and more importantly, you trust the hypervisor not to...

Here's a scenario every Kubernetes learner eventually runs into: your Pods are all Running, your Deployments say 1/1 or 3/3 AVAILABLE, everything looks healthy in kubectl get... and yet when you try to actually hit your app, you get nothing but silen...

In Part 1, we created and validated an etcd snapshot while an nginx Deployment existed. Now we deliberately remove that workload, restore the snapshot, reconfigure the static etcd Pod, troubleshoot the problems that appear, and bring etcd back to a ...

This is Part 1 of a two-part series. In this part, the focus is entirely on the backup side of the disaster-recovery exercise: understanding what etcd does; verifying the Kubernetes control plane; locating the static etcd manifest; understanding...

This post documents a real debugging session that started with a simple symptom — example.com wouldn't load — and ended up uncovering several separate, unrelated problems layered on top of each other. It's written to walk through the actual diagnosti...

Today's goal: take a simple Flask app running in Kubernetes and expose it to the outside world using Ingress, instead of relying on NodePort or LoadBalancer services. This post walks through the setup, the errors I hit along the way, and how each one...

Have you ever wondered what Desired State and Actual State mean in Kubernetes? I used to hear those terms all the time, but they didn't truly make sense until I watched a football match. In this videohttps://www.youtube.com/watch?v=X7LAFxM1Yt4, Ada...

Today I learned one of the most confusing Kubernetes concepts for beginners: PersistentVolumes PV and PersistentVolumeClaims PVC. At first, my PVC refused to bind and stayed in the Pending state. After some troubleshooting, I finally got everything ...

What is Cloud Computing? Traditionally, if you wanted to run an application, you had to buy: Physical servers Storage devices Networking equipment Cooling systems Backup power Security infrastructure Cloud providers own this infrastructure and let...

When application scalability depends entirely on processing efficiency, software teams must look beyond standard code structures. We analyze how modern Python minimizes time-to-market and processing latency under intensive production workloads. The ...

If you've ever wondered, "How do I stop my pods from randomly talking to everything in my cluster?" – this is the post for you. Today, I dove into Kubernetes Network Policies – the way you control who can talk to whom inside your cluster. I started ...

> Disclosure: Some of the links in this article are affiliate links. This means I may earn a small commission if you click on them. I only recommend tools that I have used. Learning cloud and DevOps takes patience, discipline, and consistency. Ther...