ESXi Firewall Rules Configuration

As the title is speaking for itself, it is quite clear that today, I am going to discuss various methods to open and close firewall ports on ESXi hosts. It is useless to consider whether configuring firewall rules is harmful or not since every admin once in a while meets the necessity of fine-tuning network to distribute access rights. So, you ought to know all the tools at your disposal one way or another.

VMFS Datastore on a USB drive

As an admin, I often have to deal with the necessity to transfer large OVF and ISO files or even move virtual machines (VMs) between ESXi hosts that have poor network performance or disposed in different locations with no network connection whatsoever.

Nested virtualization: VMware ESXi vs. Microsoft Hyper-V

Some time ago, I published articles on setting up a home lab using a PC running ESXi and Workstation. We all know that nested virtualization is not an ESXi-only feature; Microsoft Hyper-V also enables us to run VMs inside its VMs. Microsoft’s implementation of this technology is a bit different, but it exists. And, considering that VMware and Microsoft have been competing for a long time, it’s interesting to see what each has to offer for this type of virtualization. In this post, I examine how easy it is to configure a nested virtualization layer inside Hyper-V and vSphere VMs and discuss peculiarities of this process in both environments.

How VMware has covered performance gap between physical and virtual GPUs

Once engineers came up with the way to virtualize graphics processing units (GPUs), the new era started for machine learning, gaming, modeling, and whatever else IOPS-hungry: all these applications can now go cloud! In this article, I’d like to take a closer look at why GPU virtualization is so promising, who pioneers this tech, and how VMware managed to cover the gap between the virtual and bare-metal GPUs.

How to shrink VMDK with a couple of PowerShell scripts?

While extending a VMDK file is a fairly easy task that can be performed right in Disk Manager, shrinking a virtual disk is a bit tricky. And, you need to be really careful because unless done properly, reducing virtual disk size may cause data loss! Sure, you can just use VMware Converter to make a VMDK smaller, but, for my money, it is always better to have a script at hand. In this article, I’ll discuss how to shrink virtual disks with 2 simple PowerShell scripts.

How to backup & restore with VMware vCSA 6.7

An ability to back up and restore vCenter Server Appliance (vCSA) configurations appeared back in vCSA 6.5. I guess that many have already used it. If you were unlucky to restore from that backup, you know that this procedure is not that straightforward. Bad news: In vCSA 6.7 Update 1 configuration restore process is still like that. In today’s article, I take a closer look at how you back up and restore VMware vCSA 6.7 configuration.

What’s new in VMware vSphere 6.7 Update 1? Let’s look under the hood

Some time ago, VMware released VMware vSphere 6.7 U1. You know, I am really happy to, finally, find some time to take a thorough look at it. vSphere 6.7 U1 is the most up-to-date version of this virtualization platform so far, thus it is good to know its new features to predict what to expect of the upcoming versions. Well, I guess that this article is kinda of a long read. Honestly, I could not make it shorter as I wanted it to provide the entire picture of changes that were brought to vSphere 6.7 platform with U1. I hope you like it.