Troubleshooting

vCF 3.x – Upgrade Precheck fails at ESXi hosts

vCF 3.x – Upgrade Precheck fails at ESXi hosts

Problem Recap When starting a vCF upgrade, it is always wise to start the precheck. At one of our customers, the precheck failes quite often on the ESXi hosts. The most common reason for this was that the customer didn’t have a persistent scratch partition, and with that, also not a ”scratch/downloads” folder. Another reason ...read more →
vCF 3.x – Web GUI looks weird after RPM upgrade of SDDC-Manager-UI-app.service

vCF 3.x – Web GUI looks weird after RPM upgrade of SDDC-Manager-UI-app.service

Intro In one of my posts I explained that we had a problem with the upgrade of the SDDC Manager, especially with the SDDC-Manager-UI component. It once again failed and I needed to do an upgrade of the RPM manually. But what I noticed, was that when ever I upgraded the RPM of SDDC Manager ...read more →
vCF 3.x – vRSLCM 2.x upgrade fails after deployment

vCF 3.x – vRSLCM 2.x upgrade fails after deployment

Intro At one of my customers, we had a problem that the vRealize Suite Lifecycle Manager (vRSLCM) didn’t want to upgrade. We already faced quite some problems with the vCF upgrades, so this one was a nice extra present. This happened when we were upgrading from vCF 3.0.1.1 towards 3.5. In this upgrade we had ...read more →
vCF 3.x – SDDC Manager Upgrade fails at SDDC-Manager-UI Component

vCF 3.x – SDDC Manager Upgrade fails at SDDC-Manager-UI Component

Problem Recap At a customer we had an issue that came back every SDDC-Manager upgrade within the 3.x versions. The SDDC-Manager doesn’t seem to start the upgrade of the SDDC-Manager-UI.app service. In the logs there is almost nothing to find of why this isn’t starting. When looking really closely, we see that the RPM is ...read more →
vCF 3.x – No bundles available in the SDDC Manager

vCF 3.x – No bundles available in the SDDC Manager

Problem Recap After a successful upgrade of the SDDC Manager to version 3.7.1, the UI of the SDDC Manager doesn’t show me any new bundles that can be downloaded. This issue is commonly known for version 3.7.1. and that is because the SDDC Manager needs 2 updates before it can continue with the other components. ...read more →
Troubleshooting: Cannot Add host “Authenticity of the host’s SSL certificate is not verified”.

Troubleshooting: Cannot Add host “Authenticity of the host’s SSL certificate is not verified”.

Intro One of my customers wanted to change the hostname of the ESXi host. In this case, the ESXi hostname stayed the same, but it needed to become part of  a subdomain. Changing an ESXi hostname This can normally be easily done in the following way: Migrate VMs, offline VMs and templates of the host. ...read more →
VUM Error: Host cannot download files from VMware vSphere Update Manager patch store

VUM Error: Host cannot download files from VMware vSphere Update Manager patch store

Setup: vCSA 6.5 with embedded VUM Intro: At one of my customers, I had a weird problem that one of the hosts couldn’t updated through VUM. Time to investigate. Error: “Host cannot download files from VMware vSphere Update Manager patch store.  Check the network connectivity and firewall setup, and check esxupdate logs for details.” When ...read more →
vCenter doesn’t start up – Failed to start File System Check on /dev/dis..

vCenter doesn’t start up – Failed to start File System Check on /dev/dis..

A customer of mine had some problems with a vCenter (vCSA 6.5) that didn’t want to boot up anymore. First thing I checked was if I could log in on the vCenter Appliance Management Interface (VAMI). Unfortunately both the webclient as VAMI was unresponsive. This was also the case with SSH. So the last thing ...read more →
TIQR (SURFnet) stopped working after Android Update 9 (Android Pie)

TIQR (SURFnet) stopped working after Android Update 9 (Android Pie)

For one of my customers, I use TIQR to login remotely. However, after an Android Update towards version 9, the application stopped working. In the beginning it looked like the application didn’t have any problem, since I still would get a push notification that would ask for my code. However, every time I typed down ...read more →
VM has No Network Connection, Windows 7 – VMware Fusion 10.1 (Workstation)

VM has No Network Connection, Windows 7 – VMware Fusion 10.1 (Workstation)

Recently I had a weird issue that a Windows 7 virtual machine on VMware Fusion (10.1) wasn’t able to make any network connections. After doing all the basic checks (NAT configured, Windows Firewall, Network adapter connected in VM) I didn’t had a clue what was causing the issue. Still, the problem looked like an issue ...read more →
vSphere Troubleshooting: Hosts Disconnects  “Agent unable to save configuration to disk: Error syncing firmware configuration: vim.fault.TooManyWrites”

vSphere Troubleshooting: Hosts Disconnects “Agent unable to save configuration to disk: Error syncing firmware configuration: vim.fault.TooManyWrites”

During a deployment of several ESXi hosts at a customer, I noticed that the new hosts were disconnecting every few minutes. When I checked the event error, it showed a lot of different errors and events, mostly about disconnection errors and connection failures. Which I found weird. Looking closer, the error message reads: “agent unable ...read more →
Troubleshooting: vSphere Sessions are constantly logging off –  Connection Timeout

Troubleshooting: vSphere Sessions are constantly logging off – Connection Timeout

I recently had a problem that one of my vCenters (vCSA 6.5) was constantly logging off any kind of user after a few minutes. Which would end up with the following error output: “Your vsphere Client session is no longer authenticated Please login again”. This even happend after 2 minutes whenever I was logged in. ...read more →
Retrieving License Keys and other Valuable information from HPE Servers

Retrieving License Keys and other Valuable information from HPE Servers

Sometimes, you want to have more info then the GUI shows you, or you want to create or change configuration on loads of different servers, and clicking is not the fastest way. Command line and scripting tools always have been a nice way to automate things or to retrieve valuable information that can’t be found ...read more →
vCSA6.5 Installation Stuck at 80% and some other fun errors during Deployment.

vCSA6.5 Installation Stuck at 80% and some other fun errors during Deployment.

if you came across this post then you’ll probably had the problem that the vCenter installation became stuck around the 80%, with the text “Installing RPM This may take several minutes…”. Unfortunately, this doesn’t take minutes but several hours until it figures out that it got an issue and it just stops. Like this screen: ...read more →
Crashed Synology Volume, and how to Restore (DS415 Play)

Crashed Synology Volume, and how to Restore (DS415 Play)

Intro As an IT guy, I have started to get a little bit of my own personal lab, and when sometimes something breaks, I always try to see it as a fun way to gain some experience and put on my troubleshooting hat. The fun stops however, when you know that you might possibly lost ...read more →