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SHIFT-WIKI - Sjoerd Hooft's InFormation Technology
This WIKI is my personal documentation blog. Please enjoy it and feel free to reach out through blue sky if you have a question, remark, improvement or observation. See below for the latest additions, or use the search or tags to browse for content.
Thoughts on Upgrading Terraform Providers
Summary: On this wiki page I will cover my experience in upgrading the AzureRM Terraform provider from version 3.112 to 4.51.
Date: 8 November 2025
Recently I had to upgrade the AzureRM terraform provider. We hadn't upgraded it in a while due to other priorities, but once these were addressed, I set about the task of upgrading the provider. On this page I will try to give some background on the process and the provider itself, as well as some of the issues I encountered.
How to Add Text to Each File in a Directory in a Repository
Summary: This wiki page shows how I added google ads to each wiki page in a Repository using powershell, and use a VS Code extension to make sure new files get the same treatment.
Date: 25 October 2025
Using VS Code and Lens to connect to a private AKS cluster
Summary: This wiki page explains how to use VS Code and Lens to connect to a private AKS cluster.
Date: 15 September 2025
There are many ways to connect to a private AKS cluster. This page assumes you have a jumpbox VM in the same virtual network as the AKS cluster, and that you can connect to the jumpbox using Azure Bastion. Using VS Code with the extensions explained below is the easiest way to connect to a private AKS cluster, but also has it's limitations. For that reason, I'll also explain how to use Lens to connect to the private AKS cluster.
How to Clone a PVC in Kubernetes
Summary: This wiki page shows how to clone a Persistent Volume Claim (PVC) in Kubernetes.
Date: 14 September 2025
When doing an Argo CD sync I got an error on one of our PVCs. For one of our applications we upgraded the storage class but hadn't had the time yet to convert the actual PVC:
one or more objects failed to apply, reason: PersistentVolumeClaim "seq" is invalid: spec: Forbidden: spec is immutable after creation except resources.requests and volumeAttributesClassName for bound claims core.PersistentVolumeClaimSpec{ ... // 2 identical fields Resources: {Requests: {s"storage": {i: {...}, Format: "BinarySI"}}}, VolumeName: "pvc-2bc75dce-01e6-4f8b-ae06-3fc6c6657dac", - StorageClassName: &"default", + StorageClassName: &"managed-premium", VolumeMode: &"Filesystem", DataSource: nil, ... // 2 identical fields }
As you can see, the storage class 'default' is changed to 'managed-premium', but unfortunately, this cannot be done online in Kubernetes, as that setting is immutable. Follow the procedure below to use 'korb' to quickly clone the PVC to a new one with the correct storage class.