PAUL'S BLOG

Learn. Build. Share. Repeat.

Progressive Delivery on AKS: A Step-by-Step Guide using Flagger with Istio and FluxCD

2023-09-26 13 min read GitOps Kubernetes Developer Tutorial
In my previous post, we setup an Azure Kubernetes Service (AKS) cluster to automatically update images based on new image tags in a container registry. As soon as a new image was pushed to the registry the image was immediately updated. But what if you don’t want an agent automatically pushing out new images without some sort of testing? 🤔 In this article, we’ll build upon Flux’s image update automation capability and add Flagger to implement a canary release strategy. Continue reading

Automating Image Updates with FluxCD on AKS

2023-09-22 13 min read GitOps Kubernetes Developer Tutorial
In my previous post, we walked through the setup of FluxCD on AKS via AKS extensions. In this article, we’ll go a bit deeper and take a look at how you can use FluxCD to automate image updates in your AKS cluster. The goal here is to streamline the process of updating your application deployments in your cluster. Here is our intended workflow: Modify application code, then commit and push the change to the repo. Continue reading

Git going with GitOps on AKS: A Step-by-Step Guide using FluxCD AKS Extension

2023-09-20 12 min read GitOps Kubernetes Developer Tutorial
In reading through @StevenMurawski’s blog post titled, What Really is GitOps? we learned that GitOps is a way to do Continuous Delivery of our applications on Kubernetes. In this post, I will jump right into how you can “git” going with GitOps by enabling the FluxCD AKS Extension on your Azure Kubernetes Service (AKS) and using a tool called Kustomize to help with Kubernetes configuration management. We’ll deploy my new favorite demo app, AKS Store Demo to our AKS cluster and then make some changes to the application and see how FluxCD handles them. Continue reading

Installing .NET on Ubuntu

2023-09-09 1 min read Code snippets
Installing .NET on Ubuntu is supposed to be easy. Sometimes it’s not. You should be able to follow the instructions on the Microsoft docs and install from a package manager but I’ve had issues with that. It’s been a frustrating experience; the package installs but then I can’t run dotnet --version and I can’t figure out why. Thankfully there is an option to manually install .NET, this is what I’ve had the most success with. Continue reading

Pushing Multi-Architecture Container Images

Introduction My previous article, Building Multi-Architecture Container Images, covered the basics of building multi-architecture container images using Docker Buildx. In this article, we’ll explore how to push multi-architecture container images to Azure Container Registry (ACR) using GitHub Actions. What is a GitHub Action? GitHub Actions is a continuous integration and continuous deployment (CI/CD) platform built into GitHub. It allows you to automate, customize, and execute your software development workflows. Using GitHub Actions, you can create workflows that respond to GitHub events, such as push, issue creation, or a new release. Continue reading

Building Multi-Architecture Container Images

Introduction Over the past several years, we’ve seen the emergence of the ARM64 architecture, which is gaining popularity due to its energy efficiency and performance benefits. We often seen these processors in mobile devices, such as smartphones and tablets. We also seen them in our IoT devices, such as smartwatches and smart TVs. Now, we are starting to see increased adoption of ARM64 processors in servers and personal computers. This emergence of the ARM64 architecture, means that we now have two major processor architectures to consider when building and deploying our containerized applications in order to maximize our application’s reach. Continue reading

Does Workload Identity on AKS work across tenants?

2023-08-25 11 min read Tutorial Identity Azure AKS
Introduction An interesting use case for Workload Identity came up recently. I was asked if a Pod in an AKS cluster that was deployed in one tenant can access Azure resources within another tenant. I’ve configured Workload Identity on AKS many times, and I thought “in theory” it should “just work”, but I never tested it across tenants. So I decided to give it a try. TL;DR: Yes, it does work. Continue reading
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