Category: Blog

Blog Cloud Foundation VMware
21.10.2026

Removing VCF Log Management 9.1 to Free Up 2 TB

I run a 24/7 Dell XR4000 Prod’ Cluster that does not have a lot of storage to spare. With VMware vSphere Foundation (VVF) 9.1, Log Management (formerly VCF Operations for Logs) became an integrated service that runs on the VCF Management Services platform, and in my environment it was taking up almost 2 TB. For a cluster of my size that is simply too much, […]

Blog VKS / Tanzu VMware
16.10.2026

VKS Update fails with “supervisor content is being processed”

While preparing an update of our Supervisor cluster (VKS01) from v1.32.9 to v1.33.13 on vSphere 9.1, the update wizard looked perfectly healthy at first: the pre-checks in step 1 turned green. Then, in step 2 (“Review”), the wizard refused to continue with this error: A general system error occurred. Error message: supervisor content is being processed. The message is generic and does not tell you […]

Blog Dell Dell XR4000
09.10.2026

Dell XR4000 – Witness Node Upgrade

If you run a two-node vSAN cluster at the edge, you need a witness. Dell’s PowerEdge XR4000w is a compact witness sled that does the job nicely, but it comes with a catch: it is a stripped-down server without an iDRAC, so you cannot simply mount an ISO through a virtual console. The first ESXi installation has to be done over a serial connection. In […]

Blog Dell Dell VxRail
07.10.2026

VxVerify: “DO host queries failed”

We wanted a VxVerify health check before updating the environment to the latest 8.0.x. The package was unpacked on the appliance and we started it the way we had done on older clusters. The message points in two directions, and both were wrong for us. “DO host queries failed” suggests that the do-host microservice or the ESXi nodes have a problem. “Rerun as root” suggests […]

Blog Dell Dell VxRail
05.10.2026

Recovering a VxRail Manager with nearly every pod in CrashLoopBackOff

The VxRail Manager VM had been rebooted and the VxRail pages in the vSphere Client no longer loaded. VxRail Manager runs its services as Kubernetes pods on the appliance itself, so the first look was at one of the pods that was obviously unhappy. Two details matter here. The container starts and finishes within the same second, and the exit code is 1. That rules […]

Blog Cloud Foundation ESX VMware
05.10.2026

Upgrading ESX in VCF 9.1.1 from VCF Operations: “There are no images available”

Another field report from a VCF 9.1 → 9.1.1 upgrade: why the ESX step of the Configure Upgrade wizard asks for an image maybe didn’t configured yet, how to create and import it, what the prechecks said. Abstract Prerequisites: The ESX upgrade comes after SDDC Manager, NSX and vCenter in the management domain sequence. Before you start, make sure that: The Component Versions view of […]

Blog Cloud Foundation NSX VMware
03.10.2026

VCF 9.1 → 9.1.1: “Failed to upload NSX bundle” in the NSX Upgrade Coordinator

Today I wrote a field report from a VMware Cloud Foundation 9.1 to 9.1.1 maintenance upgrade: the order that matters, the error that stopped the NSX Manager upgrade, how to prove the bundle was not the problem, and what got the upgrade moving again. Abstract Prerequisites: Everything above NSX must already be on 9.1.1 Before touching NSX, be clear about where you are in the […]

Blog NSX VMware
29.09.2026

VCF 9.1: Fixing an Exhausted NSX TEP Pool

While running a Host Add Workflow in my VCF 9.1 environment, the validation step “Validate IP Address Availability for Edge Overlay (TEP) IP Assignment” failed right away with the following error: The message is pretty clear: the Host Add workflow needs 4 new tunnel endpoint (TEP) IP addresses, but the NSX IP address pool that provides them is completely used up. Every overlay-enabled transport node […]

Blog ESX VMware
21.07.2026

TPM Encryption Recovery Key Backup Alarm

Immediately after the successful bring-up of the VCF 9.1 environment, the following warning alarm was triggered on all four ESX hosts within the vCenter Cluster Monitor page: “TPM Encryption Recovery Key Backup” This alarm appeared on all hosts simultaneously and was not an indicator of a deployment error, but rather an expected consequence of the hardware and software configuration in use. Root Cause Starting with […]

Blog Linux Ubuntu
17.07.2026

Ubiquiti Travel Router (UTR) and Wireguard VPN Setup

Before diving into the technical details, I want to give credit where credit is due. This whole journey started with a video by my colleague Dennis Schröder. I came across his content, watched his take on the UniFi Travel Router, and was immediately sold. His video is one of those rare pieces of content that doesn’t just show you a product – it makes you […]