Category Archives: Azure

Remove dangling multi-arch container manifests from Azure Container Registry

Last year I wrote a blog post about removing dangling container manifests from ACR. -> https://www.danielstechblog.io/remove-dangling-container-manifests-from-azure-container-registry/ I did not cover an edge case when it comes to multi-arch container manifests. So, here we are, and I walk you through that topic today. First, do not be afraid the PowerShell script from last year works perfectly Read more [...]

Running gVisor on Azure Kubernetes Service for sandboxing containers

gVisor is one option beside Kata Containers or Firecracker for sandboxing containers to minimize the risk when running untrusted workloads on Kubernetes. -> https://gvisor.dev/ Currently, the only managed Kubernetes service which supports gVisor in dedicated node pools per default is Google Kubernetes Engine. But with a bit of an effort this is doable as well on Azure Kubernetes Service. At Read more [...]

Run the Istio ingress gateway with TLS termination and TLS passthrough

The Istio ingress gateway supports two modes for dealing with TLS traffic: TLS termination and TLS passthrough. Running Istio with TLS termination is the default and standard configuration for most installations. Incoming TLS traffic is terminated at the Istio ingress gateway level and then sent to the destination service encrypted via mTLS within the service mesh. Having the TLS passthrough Read more [...]

Using Conftest for Azure Policy for Kubernetes

Conftest is a tool that lets you write tests against structure data like Kubernetes templates. -> https://www.conftest.dev/ So, why should you use Conftest when you already established your policies with Azure Policy for Kubernetes? As Azure Policy for Kubernetes uses Gatekeeper the OPA implementation for Kubernetes under the hood it uses Gatekeeper constraint templates written in Rego. Read more [...]

Mitigating slow container image pulls on Azure Kubernetes Service

It might happen that you experience slow container image pulls on your Azure Kubernetes Service nodes. First thought might be the Azure Container Registry is the root cause. Even when using the ACR without the geo-replication option enabled, image pulls from an ACR in Europe to AKS nodes running in Australia are fast. Therefore, it can be the ACR especially when you do not use the Premium SKU as the Read more [...]

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 [...]