baeke.info, page 8
Taking Azure Container Apps for a spin
At Ignite November 2021, Microsoft released Azure Container Apps as a public preview. It allows you to run containerized applications on a serverless platform, in the sense that you do not have to worry about the underlying infrastructure. The underlying infrastructure is Kubernetes (AKS) as the control plane with additional software such as: Dapr: distributed…
Kubernetes Blue-Green deployments with Argo Rollouts
In this post, we will take a look at 🟦/🟩 blue-green deployments in Kubernetes. With blue-green deployments, you deploy a new version of an application or service next to the live and stable version. After manual or automatic checks, you promote the new version to become the live version. Switching between versions is simply a…
Trying out WebAssembly on Azure Kubernetes Service
Introduction In October 2021, Microsoft announced the public preview of AKS support for deploying WebAssembly System Interface (WASI) workloads in Kubernetes. You can read the announcement here. In short, that means we can run another type of workload on Kubernetes, besides containers! WebAssembly is maybe best known for the ability to write code with languages…
DNS Options for Private Azure Kubernetes Service
When you deploy Azure Kubernetes Service (AKS), by default the API server is publicly made available. That means it has a public IP address and an Azure-assigned name that’s resolvable by public DNS servers. To secure access, you can use authorized IP ranges. As an alternative, you can deploy a private AKS cluster. That means…
Approving a private endpoint connection with Azure CLI
In my previous post, I wrote about App Services with Private Link and used Azure Front Door to publish the web app. Azure Front Door Premium (in preview), can create a Private Endpoint and link it to your web app via Azure Private Link. When that happens, you need to approve the pending connection in…
Azure App Services with Private Link
In one of my videos on my YouTube channel, I discuss Azure App Services with Private Link. The video describes how it works and provides an example of deploying the infrastructure with Bicep. The Bicep templates are on GitHub. If you want to jump straight to the video, here it is: In the rest of…
A quick look at azure/kubelogin
I have talked about and demonstrated the use of kubelogin in previous posts and videos. Because I often get questions about logging on to Azure Kubernetes Services (AKS) integrated with Azure AD (AAD) in a non-interactive fashion, I decided to write this separate post about it. What is kubelogin? Kubelogin is a client-go credential plugin…
Building a GitHub Action with Docker
While I was investigating Kyverno, I wanted to check my Kubernetes deployments for compliance with Kyverno policies. The Kyverno CLI can be used to do that with the following command: kyverno apply ./policies –resource=./deploy/deployment.yaml To do this easily from a GitHub workflow, I created an action called gbaeke/kyverno-cli. The action uses a Docker container. It…
Using Kyverno for Kubernetes Policies
In an earlier blogpost, I wrote about Kubernetes Policies on Azure Kubernetes Service with the Azure Policy add-on. The add-on installs Gatekeeper v3 on AKS, which relies on Open Policy Agent to define your policies. Open Policy Agent is a general cloud-native solution for policy-based control, which goes beyond Kubernetes. Defining custom policies for OPA…
Distroless or scratch for Go apps?
Business photo created by aopsan – http://www.freepik.com When I create docker images for a Go application, I often use the scratch image. Scratch is an empty image, so it is ideal for statically linked binaries that do not require libc. Go, Rust and other languages can compile to such binaries. Because I like the pattern…
