Category: General
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High available control plane with Istio 1.5 on Azure Kubernetes Service
Back in January I have written a blog post about installing the Istio control plane on AKS in HA mode. -> https://www.danielstechblog.io/install-a-high-available-istio-control-plane-on-azure-kubernetes-service/ Since the release of Istio 1.5 this month the overall architecture of the Istio control plane has changed. -> https://istio.io/news/releases/1.5.x/announcing-1.5/#introducing-istiod With the introduction of Istiod the number of deployed pods get dramatically reduced,…
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Install Homebrew for Linux in Azure Cloud Shell
As macOS user you properly know Homebrew the package manager and you might know that you can install it also on Linux. The Azure Cloud Shell is based on an Ubuntu image, but has some special requirements where to store data that should be persisted throughout your sessions. -> https://docs.microsoft.com/en-us/azure/cloud-shell/persisting-shell-storage#how-cloud-shell-storage-works Therefore, we cannot use the…
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Using the Powerlevel10k theme in Azure Cloud Shell
Last year I have written a blog post about setting up the Zsh with Oh My Zsh in Azure Cloud Shell. -> https://www.danielstechblog.io/setting-up-zsh-with-oh-my-zsh-in-azure-cloud-shell/ Recently, I switched to the Powerlevel10k theme and ran through the setup wizard to generate a configuration with a lean prompt style. -> https://github.com/romkatv/powerlevel10k Before, I used the robbyrussel theme for my…
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Updated maximum nodes limit – Azure Function App – AKS Azure CNI IP address calculation
Just a short information about the update I have done for the Azure Function App doing the AKS Azure CNI IP address calculation. Since the last update there has been a change to the maximum nodes per cluster limit supported by AKS. Maximum nodes per cluster (only with multiple node pools and VMSS): 1000 ->…
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Combine istioctl commands with kubectl-select
Since working with Istio I stumbled a couple of times over some of the istioctl commands that require to select a specific pod or service. Some of these commands are istioctl… …dashboard controlz {Istio pilot pod name} …dashboard envoy {pod name} …experimental describe service {service name} …experimental metrics {service name} …proxy-config bootstrap {pod name} For…
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Install a high available Istio control plane on Azure Kubernetes Service
Lately I worked intensively with Istio and focused especially on the topic high availability of the Istio control plane. When you install Istio with the default profile, as mentioned in the Istio documentation, you get a non-high available control plane. istioctl manifest apply \ –set values.global.mtls.enabled=true \ –set values.global.controlPlaneSecurityEnabled=true Per default Istio gets installed with…