Category Archive: Script

Oct 03 2017

Nutanix AHV VM Reporting Via REST API

Some time ago I provided a virtual machine reporting script for Nutanix hypervisor AHV virtual machines via the blog post “Nutanix AHV VM Reporting”.That script was running on a Nutanix Controller Virtual Machine (CVM) so it had some shortcomings in terms of flexibility and scheduling options. This new script provides all the output parameters included …

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Jul 16 2017

List VMware ESXi vMotion Enabled VMkernel Interfaces Using PowerCLI

A while back during a troubleshooting exercise I created a script to list ESXi host VMKernel Interfaces (vmk) with vMotion enabled since some of the ESXi hosts had vMotion enabled on multiple interfaces. The below information is included per ESXi hosts in the script output CSV file: VMHost – ESXi host Name IP – IP …

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Jul 07 2017

Add Multiple ESXi Hosts To vCenter Server Using PowerCLi

A few days back I created a vSphere cluster with 32 ESXi hosts and I really didn’t want to add all these hosts using the UI so I decided to put together a short powercli script to manage this. The script that was tested using the following software versions: VMware vCenter Server 6.5 VMware ESXi 6.5 build 5146846 …

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Feb 28 2017

Change AHV Based Nutanix Controller Virtual Machine (CVM) RAM

A few days ago i changed Nutanix Controller Virtual Machine (CVM) Memory configuration for a customer. There is a Nutanix KB about this which can be found here here but since it includes manual steps i figure i create a script which you can run from the AHV host. This blog post is divided into the following sections: …

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Oct 11 2016

Duplicate random generated data in Linux based VM

A few weeks back i create a blog post about how to create random data in a Linux (CentOS) based VM which you can read here.  Based on that post i have received a few comments and one in particular i’ll address in this blog post and it was about the time it takes to generate …

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Aug 23 2016

Generate random data in Linux based VM

A few weeks back i was asked by a customer to create a lot of random data in same amount of Linux (CentOS) based VMs as there were Nutanix nodes in their cluster. I can see multiple reasons for doing this but that is a complete separate discussion, i just wanted to share the bash …

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Jun 01 2014

vSphere VM vCPU to ESXi host CPU core allocation

There has been quite a lot of discussion regarding resource utilization and resource allocation in vSphere environments lately. There are a lot of tools around doing analysis (some better than others) of your environment and gives suggestions if you need to e.g.: Add more resources (CPU, RAM, Disk, Network) to your vSphere cluster. Down size …

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Feb 25 2014

Create multiple VMs from existing vSphere VM using PowerCLI

I recently published the blog post “Create multiple VMs using PowerCLI” and as i mentioned in the post i thought the next request would be a PowerCLI script to create multiple VMs from an existing vSphere virtual machine (VM). It just took a few days before the request reached my email inbox. I actually received a few …

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Jan 30 2014

Create multiple VMs using PowerCLI

A couple of days ago i received a request from a customer asking for a PowerCLI script to create VMs. There were a couple of requirements for the script. Specify the number of VMs to be created. The VMs must be powered on after the creation. The VMs must be placed on all ESXi hosts …

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Jan 21 2014

ESXi host VMkernel.Boot.terminateVMOnPDL configuration using PowerCLI

I have already written a blog post about how you can configure the ESXi host  setting disk.terminateVMOnPDLDefault in vSphere version 5.1. You can find that blog post here. I have received a couple of questions about how to configure the setting, called VMkernel.Boot.terminateVMOnPDL, in ESXi 5.5 so i decided to put together a blog post about it. …

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Jan 08 2014

ESXi 5.1 VMFS HeapSize configuration using PowerCLI

There are a few of my customer still running vSphere 5.1 U1 and one of them reported an issue related to the VMFS Heap Size (VMFS3.MaxHeapSizeMB) configuration a few days ago. Keep in mind that my customer upgraded to U1 from a previous vSphere 5.1 version meaning that the old VMFS3.MaxHeapSizeMB was retained at 80 MB …

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Oct 29 2013

Backup vSphere vNetwork Distributed Switches using PowerCLI

A few weeks ago a customer asked me how to automate the export of the vSphere vNetwork Distributed Switches (VDS) configuration. Their existing routine included to make a manual export of the VDS configuration whenever a VDS change was implemented including adding or removing a VDS port group. In the vSphere Web Client you can …

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Aug 02 2013

Use PowerCLI to compare virtual machine configured and installed guest operating system

When i presented the result from a vSphere health check the other day my costumer was quite surprised that a few of his virtual machines had an installed guest operating system that didn’t match the guest operation system configured in vSphere. Several other blogs covers the importance of having a configured guest operating system in vSphere …

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Jul 09 2013

Update vSphere DRS rules using PowerCLI

I was asked by one customer last week to create a script that adds virtual machines to a vSphere DRS group, “VM DRS Group”, based on virtual machine guest operating. My customer runs vSphere 5.1 and a licensing issue was the underlying cause of the request. My customer have two vSphere clusters running 16 ESXi …

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Jun 13 2013

Configure and report the ESXi host TSM-SSH service using PowerCLI

A customer contacted me the other day asking for a way to verify if the ESXi host TSM-SSH (SSH) service is running, and if so: Turn off the TSM-SSH service. Send an e-mail report including all ESXi hosts where the TSM-SSH service was stopped. The customer’s vSphere administrators sometimes enable the ESXi host TSM-SSH service …

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May 21 2013

vSphere and vCloud Director database creation script

A customer called me yesterday asking for a script to create the necessary databases to run: vCenter Server vCenter Single Sign On vCenter Update Manager vCloud Director The customer was about to perform a clean install in their test environment and will be using vCenter Server 5.1 U1, ESXi 5.1 U1 and vCloud Director (vCD) …

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