Category: General
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Evaluating Gatekeeper policies with the Rego Playground
Writing and evaluating Gatekeeper policies can be hard sometimes. Especially the testing part of a newly created policy. There are different approaches to tackle this like having a dedicated test Kubernetes cluster for it. An alternative we used was a script starting a single node KinD cluster on Docker for Mac and installing Gatekeeper onto…
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Increase your application availability with pod anti-affinity settings in Azure Kubernetes Service
This is the second blog post of a series of posts covering the topic about increasing the application availability on Azure Kubernetes Services / Kubernetes. Today we cover the pod anti-affinity setting. What is the pod anti-affinity? In the first post of the series, I talked about the PodDisruptionBudget. The PDB guarantees that a certain…
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Azure Kubernetes Service – Azure RBAC for Kubernetes authorization
At this year’s Ignite conference Microsoft announced the next major step of integrating Azure functionality into AKS: Azure RBAC for Kubernetes authorization. -> https://docs.microsoft.com/en-us/azure/aks/manage-azure-rbac Azure RBAC for Kubernetes authorization lets you assign built-in or custom roles onto the Azure Kubernetes Service object in Azure. So, you do not have to create Kubernetes roles and role…
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Increase your application availability with a PodDisruptionBudget on Azure Kubernetes Service
This is the first blog post of a series of posts covering the topic about increasing the application availability on Azure Kubernetes Service / Kubernetes. Today we cover the PodDisruptionBudget. What is a PodDisruptionBudget? A PDB is an additional Kubernetes object that is deployed beside your Deployment, ReplicaSet or StatefulSet increasing your application’s availability. This…
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Azure Reservations and the RBAC dilemma
Cloud computing underlies a constant change. Things you take today for granted are different tomorrow. Surprisingly, even designs and implementations on the same platform can be different. Welcome to today’s topic of Azure Reservations and the RBAC dilemma. As I have written in my brief introduction, designs and implementations can be different. Azure RBAC is…
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Troubleshooting Azure Kubernetes Service tunnel component issues
In Azure Kubernetes Service Microsoft manages the AKS control plane (Kubernetes API server, scheduler, etcd, etc.) for you. The AKS control plane interacts with the AKS nodes in your subscription via a secure connection that is established through the tunnelfront / aks-link component. -> https://docs.microsoft.com/en-us/azure/aks/concepts-clusters-workloads#kubernetes-cluster-architecture As you can run the AKS control plane within a…