Tag · 33 posts
#kubernetes
First steps with Crossplane
Image Source: crossplane.io Although Crossplane has been around for a while, I never got around to trying it. Crossplane has many capabilities. However, in this post, I will focus on the following aspects: Installing Crossplane on a Kubernetes cluster (AKS); you can install on a local cluster as well (e.g., k3s, kind, minikube, …) but…
automationLearn to use the Dapr authorization middleware
Based on a customer conversation, I decided to look into the Dapr middleware components. More specifically, I wanted to understand how the OAuth 2.0 middleware works that enables the Authorization Code flow. In the Authorization Code flow, an authorization code is a temporary code that a client obtains after being redirected to an authorization URL…
cloudTaking 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…
azureKubernetes 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…
cloudTrying 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…
cloudDNS 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…
azureBuilding 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…
automationAzure Policy for Kubernetes: Contraints and ConstraintTemplates
In one on my videos on my YouTube channel, I talked about Kubernetes authentication and used the image below: To secure access to the Kubernetes API server, you need to be authenticated and properly authorized to do what you need to do. The third mechanism to secure access is admission control. Simply put, admission control…
azureWriting a Kubernetes operator with Kopf
In today’s post, we will write a simple operator with Kopf, which is a Python framework created by Zalando. A Kubernetes operator is a piece of software, running in Kubernetes, that does something application specific. To see some examples of what operators are used for, check out operatorhub.io. Our operator will do something simple in…
apiA quick tour of Kustomize
Image above from: https://kustomize.io/ When you have to deploy an application to multiple environments like dev, test and production there are many solutions available to you. You can manually deploy the app (Nooooooo! 😉), use a CI/CD system like Azure DevOps and its release pipelines (with or without Helm) or maybe even a “GitOps” approach…
automationCreating Kubernetes secrets from Key Vault
If you do any sort of development, you often have to deal with secrets. There are many ways to deal with secrets, one of them is retrieving the secrets from a secure system from your own code. When your application runs on Kubernetes and your code (or 3rd party code) cannot be configured to retrieve…
automationTrying out k3sup
k3sup is a utility created by Alex Ellis to easily deploy k3s to any local or remote VM. In this post, I am giving the tool a try on a Civo cloud Ubuntu VM. You can of course pick any cloud provider you want or use a local system. Deploying a VM on Civo Cloud…
containersGiving linkerd a spin
A while ago, I gave linkerd a spin. Due to vacations and a busy schedule, I was not able to write about my experience. I will briefly discuss how to setup linkerd and then deploy a sample service to illustrate what it can do out of the box. Let’s go! Wait! What is linkerd? linkerd…
apiDeploy AKS and Traefik with an Azure DevOps YAML pipeline
This post is a companion to the following GitHub repository: https://github.com/gbaeke/aks-traefik-azure-deploy. The repository contains ARM templates to deploy an AD integrated Kubernetes cluster and an IP address plus a Helm chart to deploy Traefik. Traefik is configured to use the deployed IP address. In addition to those files, the repository also contains the YAML pipeline,…
cloudQuick Tip: deploying multiple Traefik ingresses
For a customer that is developing a microservices application, the proposed architecture contains two Kubernetes ingresses: internal ingress: exposed via an Azure internal load balancer, deployed in a separate subnet in the customer’s VNET; no need for SSL external ingress: exposed via an external load balancer; SSL via Let’s Encrypt The internal ingress exposes API…
apiAzure Front Door and multi-region deployments
In the previous post, we looked at publishing and securing an API with Azure Front Door and Azure Web Application Firewall. The API ran on Kubernetes, exposed by Kong and Kong Ingress Controller. Kong was configured to require an API key to call the /users API, allowing us to identify the consumer of the API.…
apiPublishing and securing your API with Kong and Azure Front Door
In the post, Securing your API with Kong and CloudFlare, I exposed a dummy API on Kubernetes with Kong and published it securely with CloudFlare. The breadth of features and its ease of use made CloudFlare a joy to work with. It didn’t take long before I got the question: “can’t you do that with Azure…
apiSecuring your API with Kong and CloudFlare
In the previous post, we looked at API Management with Kong and the Kong Ingress Controller. We did not care about security and exposed a sample toy API over a public HTTP endpoint that also required an API key. All in the clear, no firewall, no WAF, nothing… 👎👎👎 In this post, we will expose…
apiAPI Management with Kong Ingress Controller on Kubernetes
In previous posts, I wrote about Azure API Management in combination with APIs hosted on Kubernetes: API Management with private APIs: requires API Management with virtual network integration because the APIs are reachable via an internal ingress on the Azure virtual network; use the premium tier 💰💰💰 API Management with public APIs: does not require…
apiAzure API Management with public APIs on Kubernetes
In my previous blog post, I looked at Azure API Management in combination with private APIs hosted on Kubernetes. The APIs were exposed via Traefik and an internal load balancer. To make that scenario work, the Azure API Management premium SKU is required, which is quite costly. This post describes another approach where the APIs…
apiAzure DevOps multi-stage YAML pipelines
A while ago, the Azure DevOps blog posted an update about multi-stage YAML pipelines. The concept is straightforward: define both your build (CI) and release (CD) pipelines in a YAML file and stick that file in your source code repository. In this post, we will look at a simple build and release pipeline that builds…
cloudQuick overview of Traefik Ingress Controller Installation
This post is mainly a note to self 📝📝📝 that describes a quick way to deploy a Kubernetes Ingress Controller with Traefik. There is also a video version: We will install Traefik with Helm and I assume the cluster has rbac enabled. If you deploy clusters with AKS, that is the default although you can…
containersA look at Windows containers on AKS
Now that the public preview of Windows containers on AKS is available, let’s look at the basics. You need a couple of things to get started, including a couple of subscription-wide settings. I recommend using a subscription that is not used to roll out production AKS clusters. Make sure the Azure CLI (az) is homed…
containersA first look at Rancher Rio
As explained on https://github.com/rancher/rio, Rancher Rio is a MicroPaaS that can be layered on top of any standard Kubernetes cluster. It makes it easier to deploy, scale, version and expose services. In this post, we will take a quick look at some of its basic capabilities. To follow along, make sure you have a Kubernetes…
cloudStreamlined Kubernetes Development with Draft
A longer time ago, I wrote a post about draft. Draft is a tool to streamline your Kubernetes development experience. It basically automates, based on your code, the creation of a container image, storing the image in a registry and installing a container based on that image using a Helm chart. Draft is meant to…
apiAzure Kubernetes Service and Azure Firewall
Deploying Azure Kubernetes Service (AKS) is, like most other Kubernetes-as-a-service offerings such as those from DigitalOcean and Google, very straightforward. It’s either a few clicks in the portal or one or two command lines and you are finished. Using these services properly and in a secure fashion is another matter though. I am often asked…
azureRevisiting Rancher
Several years ago, when we started our first adventures in the wonderful world of IoT, we created an application for visualizing real-time streams of sensor data. The sensor data came from custom-built devices that used 2G for connectivity. IoT networks and protocols such as SigFox, NB-IoT or Lora were not mainstream at that time. We…
azureHosting an Angular app in Kubernetes
We recently had to deploy an Angular application to Kubernetes in three different environments: development, acceptance and production. The application is not accessed via the browser directly. Instead, it’s accessed via a Microsoft Office add-in. The next sections will provide you with some tips to make this work. In practice, I do not recommend hosting…
apiAKS Managed Pod Identity and access to Azure Storage
When you need to access Azure Storage (or other Azure resources) from a container in AKS (Kubernetes on Azure), you have many options. You can put credentials in your code (nooooo!), pass credentials via environment variables, use Kubernetes secrets, obtain secrets from Key Vault and so on. Usually, the credentials are keys but you can…
automationKubernetes on DigitalOcean
Image: from DigitalOcean’s website Yesterday, I decided to try out DigitalOcean’s Kubernetes. As always with DigitalOcean, the solution is straightforward and easy to use. Similarly to Azure, their managed Kubernetes product is free. You only pay for the compute of the agent nodes, persistent block storage and load balancers. The minimum price is 10$ per…
automationVirtual Node support in Azure Kubernetes Service (AKS)
Although I am using Kubernetes a lot, I didn’t quite get to trying the virtual nodes support. Virtual nodes is basically the implementation on AKS of the virtual kubelet project. The virtual kubelet project allows Kubernetes nodes to be backed by other services that support containers such as AWS Fargate, IoT Edge, Hyper.sh or Microsoft’s…
aiRecognizing images with Azure Machine Learning and the ONNX ResNet50v2 model
Featured image from: https://medium.com/comet-app/review-of-deep-learning-algorithms-for-object-detection-c1f3d437b852 In a previous post, I discussed the creation of a container image that uses the ResNet50v2 model for image classification. If you want to perform tasks such as localization or segmentation, there are other models that serve that purpose. The image was built with GPU support. Adding GPU support was pretty…
aiDraft: a simpler way to deploy to Kubernetes during development
If you work with containers and work with Kubernetes, Draft makes it easier to deploy your code while you are in the earlier development stages. You use Draft while you are working on your code but before you commit it to version control. The idea is simple: You have some code written in something like…
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