vSphere Admin scripts
Some scripts that I use to manage vSphere Turn off SSH if running Count the number of VMs that are in each vSphere cluster List the 10 largest VMs per cluster Per RAM Example output Export to CSV as well…
Tag VMware vSphere
vSphere Admission Control – Slot Policy Calculation
I wrote the post explaining what Admission control is So, if we have Slot Policy in Admission control active, how do we determine the maximum number of VMs we can run? We can calculate it manually or we can calculate…
ESXi Lockdown Mode
ESXi Lockdown Mode is a security feature in VMware ESXi that restricts direct access to the ESXi host, allowing access only through vCenter Server. This feature is designed to enhance security by preventing unauthorized users from modifying the ESXi host…
Encryption at rest – Worth the effort for vSphere HCI?
Encrypting data drives makes sense on a laptop. If you turn it off and it gets lost, a key has to be provided to decrypt the data on the drives to make it readable. But what about the disks of…
Secure ESXi – execInstalledOnly
In a previous article, I described how to activate UEFI Boot, which will disable the ESXi OS from loading 3rd party packages. What is execInstalledOnly enforcement? execInstalledOnly will ensure that non-signed scripts can be run against the ESXi. Important to…
UEFI Secure Boot
UEFI Secure Boot is a platform feature within the UEFI specification that ensures the system boots using only the software trusted by the hardware manufacturer. Secure Boot provides a verification mechanism in which the firmware validates a boot loader before executing…
Resize VM through Code
A prevalent task for a VMware admin is to power down VM X and add more CPU or RAM to the VM. Infrastructure as code enthusiasts suggest that any operation performed manually should be automated. Let us look at how…
Securing vCenter and ESXi Hosts: A VMware Architect’s Guide
In the evolving threat landscape, vCenter Server and ESXi hosts remain high-value targets in the data center. As the foundational control and compute planes of your virtual infrastructure, securing them is essential. Whether you’re operating in a regulated environment or…