PowerCLI to find vCPU to pCPU ratio and vRAM to pRAM ratio

I was in search for a script to generate report on vCPU to pCPU ratio and vRAM to pRAM at cluster level in a vCenter. Found couple of interesting community threads which address part of the requirements. Thought to consolidate (or extract:) ) the code and created the following. The report will be generated as CSV file.

Output in table format :


Ref : https://communities.vmware.com/thread/456555?start=0&tstart=0


VMware vCloud : This VM has a compliance failure against its Storage Policy.

vCloud PowerCLI




Issue :

VMs in vCloud Director displays the message : “System alert – This VM has a compliance failure against its Storage Policy.”

Symptoms :

After changing the storage profile of the VM you may observe the following error in ‘Status‘.

“System alerts – This VM has a compliance failure against its Storage Policy.”

Virtual Machine <VMName>(UUID) is NOT_COMPLIANT against Storage Policy <SP Name> as of 6/18/16 11:04 AM
Failures are:
The disk [0:0] of VM <VMName>(UUID) is on a datastore that does not support the capabilities of the disk StorageProfile <SP Name>

Resolution :

To reset the alarm in the vCloud Director.

Option 1:

  1. Click the System Alert and select ClearAll.













Option 2:

If many VMs have the same alerts then its difficult to clear one by one. In that case we can use SQL statement to clear all alerts.

  1. Log in to the database with Admin credentials using Microsoft SQL Management Studio.
  2. Run this SQL statement to display all virtual machines with the system alert:

  3. Run this update statement to clear the alert in the vCD UI:


PowerCLI to deploy VMs in VMware vCloud and connect to network

vCloud PowerCLI

This PowerCLI script will help you to deploy VMs in VMware Private vCloud and connect to network.


Powershell oneliner to find the VMware softwares installed, version and installDate.

#vmwTip 1 : Powershell oneliner to find the VMware softwares installed, version and installDate.


Steps to find NAA ID of a RDM LUN mapped to a Windows Volume


Customer requested to increase the windows volume T:. The mentioned volume is a RAW LUN located in EMC VMAX storage. To expand the LUN storage team needs NAA ID (or WWN) of the LUN.

Its easy to find the naa id of a LUN from windows Guest OS with the help of EMC’s Inquiry (inq) tool. Please find the steps below to fetch the naa id with inq tool.



  1. Download the inq tool to the VM from following hyperlink.
    1. inq
  2. Open a CMD window.
    1. Go to RUN -> cmd
  3. CD to the directory where inq is downloaded.
  4. Find the device associated to the windows volume T:.
    1. Run the command inq -winvolwinvol
    2. Here the Device name is PHYSICALDRIVE4.
  5. Find the NAA id of the LUN associated to the Device PHYSICALDRIVE4.
    1. Run the command inq -wwn naa number
    2. You can see that naa id is displayed in WWN column!!!.

To Confirm you can use the following method.

  1. Find virtual device node of the Device.
    1. Run the command inq -btlVirtual
    2. note down the Bus (0) and Tid number (4).
  2. Open VM settings check the NAAID of the disk with Virtual Device Node “0:4”.vm settings - Virtual Devicevm settings - NAA ID

Disclaimer :

I have’nt tested it on all windows platforms and tested only with EMC storages. So use at your own risk.

PowerCLI script to Set Perennial reservation on RDM LUNs in a Cluster

Please find the Powercli script for configuring Perennial reservation on all RDM luns in a ESXi Cluster. Please change the value for following variables before you execute the script.

$vcenter = “vCenter.vmtest.com”
$dCenter = “123456”
$cluster = “Production Hypervisor”

This is the flow of script execution.

1. Get the list of RDM LUNs from the cluster.
2. Check the current perennial reservation status of the RDM. If it’s TRUE, no changes will be applied.
3. If the status is FALSE, the perennial reservation will be set on the LUN.
4. Script will query the latest status and the status will be displayed.

The result, after executing the script, looks something like this.

perinnial reservation




VMware vEXPERT 2014!!

On Monday VMware announced the complete list of vExpert 2014. This year 754 people were named as vExpert. I am one among them!! humbled!!.

vExpert 2014

For those unknown with the term: “vExpert” is not a technical certification or a general measure of VMware expertise. The annual VMware vExpert title is given to individuals who have significantly contributed to the community of VMware users over the past year. The title is awarded to individuals (not employers) for their commitment to sharing their knowledge and passion for VMware technology above and beyond their job requirements. Here is the complete list of vExperts 2014.

If you feel you have contributed to the VMware community and did not apply for vExpert, good news.. the Q2 applications are already open at http://www.jotformpro.com/form/40285638168967. Good luck!

ESXi bash script to automate Power ON VM if its Powered OFF

This script with the help of crontab will enable ESXi 5.1 to poll the VM state every hour to check if it is ON and if not power it ON.

1. SSH to the host.
2. Copy and paste the following content to the shell script (auto-poweron.sh) which is placed in a vmfs volume.

Eg :-
Having enabled ssh access to your ESXi server, ssh in as root.
~ #vi /vmfs/volumes/datastore1/auto-poweron.sh

3. Replace ‘testvm’ with the appropriate vmName.
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PowerCLI script to list VMFS,RDM and Free LUNs in a cluster

Its always a time consuming job to find out the LUN is FREE, RDM or VMFS. The following script will help to get the details of LUNs from hosts in a cluster and will tell us the LUN is VMFS, RDM or FREE.

If the LUN is an RDM, we can see on which VM RDM is mapped. And if the LUN has VMFS volume, the datastore name will be displayed. Also the script provides the details like LUN number, Capacity and naa id (Canonical Name).

The CSV file that is produced by the script looks like this. In this example cluster has four hosts (esx1,esx2,esx3 and esx4), four LUNs (0,1,2 and 13) are shared among them.


You can see there are four values for TYPE.

1. VMFS :- VMFS volume (datastore)
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VM Inventory as e-mail with hyperlinks to vCenter Web UI and VM console

This post is to publish the enhanced version of the script PowerCLI sccript for exporting VM details to HTML. This version has the following features added.

1. Report will be sent as e-mail in HTML format.
2. Added Hyperlink to the vCenter Web Client to login.
3. Each VM will have the Hyperlink to the corresponding VM Console.

The output that is produced by the script looks like this


1. Hyperlinks will work only on vCenters with vSphere version 5.1 or above.
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