Azure Policy for Kubernetes – custom policies on Azure Arc enabled Kubernetes

On September 1st Microsoft announced the public preview of the custom policy support for Azure Policy for AKS. -> https://azure.microsoft.com/en-us/updates/custom-aks-policy-support-now-public-preview/ I am already using the public preview on my AKS cluster and was curious about if this would work as well with Azure Arc enabled Kubernetes. The short answer is yes, but with some minor adjustments. Configuration First Read more [...]

Local Kubernetes setup with KinD on Podman

In one of my last blog posts I walked you through the setup how to run Podman on macOS with Multipass as Docker for Desktop alternative. -> https://www.danielstechblog.io/running-podman-on-macos-with-multipass/ Today I briefly show you the local Kubernetes setup with KinD on Podman. Even the Podman support of KinD is in an experimental state it runs stable enough for the daily usage. The Read more [...]

5 years as a Microsoft MVP

Back in July I was rewarded with the precious Microsoft MVP award in the category Microsoft Azure. It took a while to receive my MVP award disks, especially the 5 years disk. I am looking forward to my fifth award year and my upcoming speaking engagements at the Cloud Summit 2021 in September and the European Cloud Summit at the end of November. -> https://azuresummit.live/ -> https://www.cloudsummit.eu/ Read more [...]

Running Podman on macOS with Multipass

Several months ago, I worked on a little side project during my spare time but instead of writing a blog post I set it aside till today. Since the announcement that Docker made yesterday on what has changed in the Docker Subscription Service Agreement my side project got my attention again. -> https://www.docker.com/blog/updating-product-subscriptions/ For most of us nothing will change Read more [...]

Identify the max capacity of ephemeral OS disks for Azure VM sizes

Back in 2019 Microsoft introduced the ephemeral OS disk option for Azure VMs and VMSS. -> https://azure.microsoft.com/en-us/updates/azure-ephemeral-os-disk-now-generally-available/ Instead of storing and persisting the OS disk to the Azure remote storage the ephemeral OS disk is stored onto the VM’s cache. Hence, ephemeral OS disks are perfect for stateless workloads like Azure Kubernetes Read more [...]

Remove dangling container manifests from Azure Container Registry

The Azure Container Registry offers three different SKUs which differentiate from each other not only from the feature set. Each SKU comes with included storage starting at 10 GB up to 500 GB. Depending on the usage pattern the included storage fills up quickly. This can be due to a lot of different container manifests from successful build pipelines or from failed pipelines pushing the container Read more [...]

Monitor the Envoy Proxy ratelimit service with Azure Monitor for containers

The last two blog posts of this series covered the setup of the Envoy Proxy ratelimit service and its implementation with Istio. -> https://www.danielstechblog.io/run-the-envoy-proxy-ratelimit-service-for-istio-on-aks-with-azure-cache-for-redis/ -> https://www.danielstechblog.io/implement-rate-limiting-with-istio-on-azure-kubernetes-service/ In today’s post I walk you through on how Read more [...]

Implement rate limiting with Istio on Azure Kubernetes Service

In my last blog post I walked you through the setup of the rate limiting reference implementation: The Envoy Proxy ratelimit service. -> https://www.danielstechblog.io/run-the-envoy-proxy-ratelimit-service-for-istio-on-aks-with-azure-cache-for-redis/ Our today’s topic is about connecting the Istio ingress gateway to the ratelimit service. The first step for us is the Istio documentation. -> Read more [...]

Detecting SNAT port exhaustion on Azure Kubernetes Service

Running applications on an Azure Kubernetes Service cluster which make a lot of outbound calls might led to a SNAT port exhaustion. In today’s blog article I walk you through how to detect and mitigate a SNAT port exhaustion on AKS. What is a SNAT port exhaustion? It is important to know what a SNAT port exhaustion is to apply the correct mitigation. SNAT, Source Network Address Translation, Read more [...]

Distribute your application across different availability zones in AKS using Pod Topology Spread Constraints

This is the last blog post of a series of posts covering the topic about increasing the application availability on Azure Kubernetes Service / Kubernetes. Today we cover the pod topology spread constraints. What are pod topology spread constraints? In the first post of the series, I talked about the pod disruption budget. The PDB guarantees that a certain amount of your application pods is available. The Read more [...]