Domain Driven Design (DDD) Explained in 10 MINUTES

Domain Driven Design (DDD) is one of the pillars of object oriented software development. You must understand it really well if you want to produce future proof code and designs. Despite it looks intimidating to most developers, the concepts of DDD are really straight-forward and to some extent based on some principles that can be … Read more

Reduce the size of Docker images with few steps

One of the advantages of using Docker images is that they are portable. However, portability is directly related to the size. A mobile phone wouldn’t be really “mobile” if it weighed 10 Kg. The same applies to Docker images. We want our containers to be as slim as possible. In this tutorial, I show you … Read more

Immutable Kubernetes Pods

Immutable Kubernetes Pods are absolutely necessary if you are deploying your applications in a containerized environments and you want them to be secure. Despite this, most developers and teams do not use immutable pods. In this tutorial, I will explain in a simple manner what they are and why they are important. We will also … Read more

Install and Learn Kubernetes in 10 minutes

In this tutorial, I will show you how to install and learn the basics of Kubernetes in just 10 minutes. We will be using a super-lightweight certified distribution of Kubernetes: MicroK8s by Canonical. This distribution requires very little resources and can run on Linux, Windows and macOS. For the purpose of this tutorial, I will … Read more

Install Maven on Ubuntu 22.04

In this tutorial, we install the latest version of Maven on Ubuntu 22.04. Unfortunately, the Ubuntu repository ships an old version of Maven which is not compatible with the recent versions of the Java Development Kit (JDK). We will proceed with the manual installation. Pre-requisites Before proceeding with the Maven installation, we need to have … Read more

Kubernetes CKAD CKA CKS Certification Exam Tips

Kubernetes is hands down the most disruptive technology that we have seen in the IT industry in recent years. It is loved by software developers, operators, and business owners. It is pure expression of what DevOps means from a technical perspective. Holding a Kubernetes certification is something I strongly advice to any serious IT practitioner. … Read more

Configure microk8s NGINX Ingress

This is a very simple and short tutorial which helps you configure your NGINX Ingress on microk8s. A common use case is enabling the use-forwarded-headers flag so that NGINX passes incoming X-Forwarded-* headers to upstreams. Verify Addon Presence Let’s verify that the our ingress addon is enabled and running with the following commands. We wait … Read more

Easy centralized logging on Kubernetes with Grafana Loki

Centralized Log Management is an essential solution for modern software development, especially when utilizing cloud native technologies. In Kubernetes, your application runs in pods which are relatively ephemeral i.e., disposable entities. Trailing the logs of pods is simply a nightmare and in general a very bad idea. A better approach is to persist all logs … Read more

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