Recently I wanted to update my VMware vSphere vCenter in my lab environment from vSphere 7 U1 to U3 latest release. Unfortunately each vCenter 7 update try fails with “install hook failed” error at 80 %. Since this troubleshooting and trial and error was very time consuming, I thought it was a good idea to share the solution. Hoping this post will save you the […]
Posted: May 8, 2023
Recently I wrote a detailed blog post about VMware Tools and the options available to update them at scale. Because this post was published on VMware’s blog Customer Experience and Success, I cannot publish the same post here. Therefore, I am summarizing my article here and providing the link to it. The first part deals with understanding VMware Tools Updates. It focuses on compatibility, what […]
Microsoft published a security update for Windows. If you see my blog posts, you will see, I am no Microsoft-guy. But there are some rumors about KB5021131. Does it break VMware vCenter login? What is KB5021131 about Microsoft will enforce applications to use the more secure AES algorithm for Kerberos encryption instead of the unsecure RC4-HMAC. For sure a good idea! Statement from KB5021131: This […]
Recently I had to change DNS server in a VMware vSphere vCenter Appliance (VCSA). Normally this works without further issues. This time it was different. vCenter services did not start after changing DNS servers. I describe in this short post what went wrong and how I could fixed it.
Posted: November 15, 2021
These days I had to troubleshoot a problem in a vCenter environment. A few VMs shown with absolute path to vmx file in vCenter inventory. Normally this occurs when a ESXi boots with no connection to its previous mounted storage volumes. VMs located on these volumes are shown like this in inventory. But this wasn’t the case here: VMs were running and no host was […]
These days I had to update a ESXi host using vCenter Update Manager (VUM). Environment is managed by a vCenter 6.7 appliance with embedded VUM. The host I got the error is managed by vCenter but not member of any cluster. After attaching a upgrade-baseline and running the compatibility check, I got the error that vCenter Update Manager cannot copy files to the host.
Posted: June 16, 2020
In an environment I saw this error when backup creates VMware snapshots of three VMs: Warning message on VM on host in datacenter. The guest OS has reported an error during quiescing. The error code was: 5. The error message was: ‘VssSyncStart’ operation failed. IDispatch error #8723 (0x80042413) Facts about the environment: Versions: ESXi version: 6.7.0, 13981272. Guest: Windows Server 2019. VMware tools: 10346 (10.3.10). […]
Posted: September 19, 2019
In this post I will describe how to use PowerCLI to add a trigger and a mail recipient to selected vSphere alarms. This is an excellent example of how PowerCLI can easily be used to do a task in a few moments while needing maybe hours when doing in GUI. A use-case for assigning a trigger and recipient to many alerts can be the implementation […]
When needed, you can configure a proxy server to automatically download VCSA updates in Appliance Management Interface (VAMI) [Port 5480] under Networking –> Proxy Settings. You have the options to configure proxy for HTTP, HTTPS and FTP. When set a proxy server in VAMI, you could see these errors: Error 1 (Syntax error) [HTTP Error in method invocation expected string or bytes-like object] Problem: You have […]
Posted: September 18, 2018