DevOps

SRE vs DevOps: What’s the Difference? In the world of modern infrastructure and operations, SRE (Site Reliability Engineering) and DevOps are often mentioned together. While they aim for similar goals — delivering reliable, scalable, and efficient systems — they approach these goals differently. What is DevOps? DevOps is a culture and set of practices that promotes collaboration between developers and operations teams. The goal is to automate and streamline software delivery and infrastructure changes. ...

K3s vs MicroK8s: Lightweight Kubernetes Showdown Need Kubernetes but without the heavy machinery? That’s where K3s and MicroK8s shine. Let’s break them down in a simple and friendly way. What Are They? K3s – A lightweight Kubernetes distribution by Rancher, designed for IoT, edge, and low-resource environments. MicroK8s – A snap-based Kubernetes distro from Canonical (Ubuntu), easy to install and manage. Why Use Them? Feature K3s MicroK8s Size <100MB ~200MB Install Single binary snap install microk8s Resource usage Very low Low High availability Yes (with some config) Yes (built-in clustering) OS compatibility Linux (only) Linux, Windows (some support) Add-ons Helm, Traefik (default), etc. Built-in add-ons (microk8s enable) Installation K3s: curl -sfL https://get.k3s.io | sh - MicroK8s: sudo snap install microk8s --classic Use Cases K3s: Great for edge computing, Raspberry Pi clusters, or minimal VMs. MicroK8s: Ideal for local development, CI/CD pipelines, and Ubuntu-based systems. Pros and Cons K3s Pros: ...

Common kube-apiserver Errors and How to Fix Them If you’re working with Kubernetes long enough, you’ll eventually run into strange behavior — and often the root cause is hidden inside the kube-apiserver. This component is the front door to your cluster, handling all requests and coordinating most actions. When it goes wrong, it can affect everything. Let’s look at common issues with the kube-apiserver and what to do about them. ...

What is APM? APM stands for Application Performance Monitoring or Application Performance Management. It’s a set of tools and practices that help you track, monitor, and optimize the performance of your applications. In simple terms, APM helps answer: Why is my app slow? What happens when users interact with the app? Where exactly is the performance bottleneck? Why Use APM? Imagine a user clicks a button on your website and it takes forever to respond. With APM, you can: ...

What is Observability? Have you ever deployed an app to production and something just felt… off? Maybe it’s slower than usual. Maybe users are seeing errors, but you’re not sure why. This is where observability comes in. Observability is about answering the question: “What’s going on inside my system?” 🧠 The Core Idea Observability is the ability to understand the internal state of a system based on the data it produces: logs, metrics, and traces. ...