Daniel's Tech Blog

Cloud Computing, Cloud Native & Kubernetes

  • Migrate an Azure storage account from LRS to ZRS replication without downtime

    This is a rather short blog post about a hidden gem in the Azure documentation. You have two options today migrating an existing Azure storage account from the LRS (locally redundant storage) to ZRS (zone-redundant storage) replication option. A manual migration or live migration. Choosing the manual migration option requires a new target storage account…

  • How to change the node size of the default node pool in AKS without downtime?

    Currently, as of writing this blog post, Azure Kubernetes Service does not support changing the node size of the default node pool or additional node pools without recreating the whole AKS cluster or the additional node pool. Having all the configuration in infrastructure as code whether it is Bicep or Terraform seems to be a…

  • Preventing SNAT port exhaustion on Azure Kubernetes Service with Virtual Network NAT

    Last year I have written a blog post about detecting SNAT port exhaustion on Azure Kubernetes Service. -> https://www.danielstechblog.io/detecting-snat-port-exhaustion-on-azure-kubernetes-service/ Today we dive into the topic of how to prevent SNAT port exhaustion on Azure Kubernetes Service with Virtual Network NAT. Since this year the managed NAT gateway option for Azure Kubernetes Service is generally available…

  • Another year as a Microsoft MVP for Azure

    Yesterday, I received a long-awaited email notifying me that I have been awarded for the sixth time as a Microsoft MVP. This is now my third award for the category Microsoft Azure. Happy to be part of this community for another year and looking forward to it.

  • Conditions with for_each in Terraform

    Conditions in Terraform are well-known and can provide in combination with the for_each argument a lot of flexibility. In today’s blog post I walk you through an example storage module I have created to showcase the topic. The module consists of three resources a resource group, a lock, and a storage account. As I am…

  • Kubernetes CPU requests demystified

    Two weeks back I participated in an incredibly good and vivid discussion on Twitter about Kubernetes CPU requests and limits. During the discussion I learned a lot and were proven that my knowledge and statement are not correct. I had made the following statement: “CPU requests are used for scheduling but are not guaranteed at…

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