vSphere 7.0 U3 contains two great vCLS enhancements

I have written about vCLS a few times, so I am not going to explain what it is or what it does ( detailed blog here). I do want to talk about what is part of vSphere 7.0 U3 specifically though as I feel these features are probably what most folks have been waiting for. Starting with vSphere 7.0 U3 it is now possible to … [Read more...]

Issue adding tags to the vCLS VMs with vCenter Server 7.0 U2b

Today I was talking to one of our field folks and he asked if there was an issue with Tags in combination with vCLS VMs in 7.0 U2b specifically. I had tested assigning tags to vCLS VMs before, and it worked just fine. With 7.0 U2b unfortunately this has stopped working. The error you will see displayed in the vSphere … [Read more...]

Can I make a host in a cluster the vSphere HA primary / master host?

There was an interesting question on the VMware VMTN Community this week, although I wrote about this in 2016 I figured I would do a short write-up again as the procedure changed since 7.0u1. The question was if it was possible to make a particular host in a cluster the vSphere HA primary (or master as it was called … [Read more...]

How long does it take before a host is declared failed?

I had a question this week around the failure of a host. The question was how long it takes before a host is declared failed. Now let’s be clear, failed means “dead” in this case, not isolated or partitioned. It could be the power has failed, the host has gone completely unresponsive, or anything else … [Read more...]

How to login to the vCLS VMs!?

I was asked this question this week, how you can login to the vCLS VMs. Now before I share the video, I want to mention that I do not encourage people doing this, but as it is documented and supported I do want to provide a simple “how to” for how this works. If you want to login to the vCLS VM, maybe for … [Read more...]

VMware vSphere Clustering Services (vCLS) considerations, questions and answers.

Advertise here with BSA In the vSphere 7.0 Update 1 release VMware introduced a new service called the VMware vSphere Clustering Service (vCLS). vCLS provides a mechanism that allows VMware to decouple both vSphere DRS and vSphere HA from vCenter Server. Niels Hagoort wrote a lengthy article on this topic here. You may … [Read more...]

Running vSphere 6.7 or 6.5 and configured HA APD/PDL responses? Read this…

Advertise here with BSA If you are running vSphere 6.7 or 6.5 and have not installed 6.7 P02 or 6.5 P05 yet and you have APD/PDL responses configured within vSphere HA it could be that an issue causes VMs not to be failed over when an APD or PDL occurs. This is a known issue in the release, and P02 or P05 solves this … [Read more...]

vSphere HA internals: restart placement changes in vSphere 7!

Advertise here with BSA Frank and I are looking to update the vSphere Clustering deep dive to vSphere 7. While scoping the work I stumbled on to something interesting, and this is the change that was introduced for the vSphere HA restart mechanism, and specifically the placement of VMs in vSphere 7. In previous … [Read more...]

vSphere HA internals: VMCP super aggressive option in vSphere 7

Advertise here with BSA Most of you probably heard about a feature called VMCP aka VM Component Protection. If not, this is the functionality in vSphere HA that enabled you to restart VMs which have been impacted by a PDL (permanent device loss) or APD (all paths down) scenario. (If you have no idea what I am talking … [Read more...]

vSphere 5.5 nuggets: High Availability Enhancement

There aren’t a lot of changes in 5.5 when it comes to vSphere High Availability aka HA, but one is worth noting. As most of you are probably aware of, vSphere HA in the past did nothing with VM to VM Affinity or Anti Affinity rules. Typically for people using “affinity” rules this was not an issue, … [Read more...]