VMware Cloud on AWS – TMCHAM – Part 12 – Host Removal

In this edition of Things My Customers Have Asked Me (TMCHAM), I’m going to cover host removal on the VMware-managed VMware Cloud on AWS platform. This is a fairly brief post, as there’s not a lot to say about the process, but I’ve had enough questions about that I thought it was worth covering.

 

Background

I’ve written about Elastic DRS (EDRS) in VMware Cloud on AWS previously. It’s something you can’t turn off, and the Baseline policy does a good job of making sure you don’t get in hot water from a storage perspective. That said, there might be occasions where you want to remove a host or two to scale in your cluster manually. This might happen after a cluster conversion, or you may have had a rapid scale out event and you have now removed whatever workloads caused that scale out event to occur.

 

Process

The process to remove a host is documented here. Note that it is a sequential process, with one host being removed at a time. Depending on the number of hosts in your cluster, you may need to adjust your storage and fault tolerance policies as well. To start the process, go to your cloud console and select the SDDC you want to remove the hosts from. If there’s only one cluster, you can click on Remove Hosts under Actions. If there are multiple clusters in the SDDC, you’ll need to select the cluster you want to remove the host from.

You’ll then be advised that you need to understand what you’re doing (and acknowledge that), and you may be advised to change your default storage policies as well. More info on those policies is here.

Once you kick off the process, the cluster will be evaluated to ensure that removing hosts will not violate the applicable EDRS policies. VMs will be migrated off the host when it’s put into maintenance mode, and billing will be stopped for that host.

And that’s it. Pretty straightforward.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.