Virtual Machine Guide Notes -03

You can cancel the cloning at any point before the customization stage.

vCenter Server adds the new task to the scheduled task list and completes it at the designated time. When it is time to perform the task, vCenter Server first verifies that the user who created the task still has permission to complete the task. If the permission levels are not acceptable, vCenter Server sends a message to the log and the task is not performed.

How many ways you can create template?

You can create a template in three ways.

1. By converting a virtual machine to a template,

2. Cloning a virtual machine to a template,or

3. Cloning another template.

Before you convert a virtual machine to a template, select it in the inventory and power it off.


Unlike other changes to templates, you do not have to convert a template to a virtual machine to change the name of a template.

Templates can become unregistered from the vCenter Server if they are removed from the inventory or if the hosts with which they are associated are removed from the vCenter Server and then re-added.

Templates ends with vmtx extension


List down requirements for Guest operating system customization?

· The current version of VMware Tools must be installed on the virtual machine or template to customize the guest operating system during cloning or deployment.

· The guest operating system being customized must be installed on a disk attached as SCSI node 0:0 in the virtual machine configuration.

· Customization of Windows guest operating systems requires the following conditions

  • Microsoft Sysprep tools must be installed on the vCenter Server system. Not needed for Windows 2008 R2
  • The ESXi host that the virtual machine is running on must be 3.5 or later

· Customization of Linux guest operating systems requires that Perl is installed in the Linux guest operating system.

If the new virtual machine encounters customization errors while it is booting, the errors are logged to %WINDIR%\temp\vmware-imc.

To view the error log file, click the Windows Start button and select Programs >Administrative Tools > Event Viewer.

Customization specifications are XML files that contain guest operating system settings for virtual machines.

vCenter Server saves the customized configuration parameters in the vCenter Server database. If the customization settings are saved, the administrator, and domain administrator, passwords are stored in encrypted format in the database. Because the certificate used to encrypt the passwords is unique to each vCenter Server system, reinstalling vCenter Server, or attaching a new instance of the server the database, invalidates the encrypted passwords. The passwords must be re-entered before they can be used.


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