A system administrator can specify Visual Basic scripts as additional steps in the provisioning process before or after provisioning a machine, or when deprovisioning a machine. You must install an External Provisioning Integration (EPI) PowerShell before you can run Visual Basic scripts.

Visual Basic scripts are specified in the blueprint from which machines are provisioned. Such scripts have access to all of the custom properties associated with the machine and can update their values. The next step in the workflow then has access to these new values.

For example, you could use a script to generate certificates or security tokens before provisioning and use them in machine provisioning.

To enable scripts in provisioning, you must install a specific type of EPI agent and place the scripts you want to use on the system on which the agent is installed.

When executing a script, the EPI agent passes all machine custom properties as arguments to the script. To return updated property values, you must place these properties in a dictionary and call a vRealize Automation function. A sample script is included in the scripts subdirectory of the EPI agent installation directory. This script contains a header to load all arguments into a dictionary, a body in which you can include your function(s), and a footer to return updated custom properties values.

Note: You can install multiple EPI/VBScripts agents on multiple servers and provision using a specific agent and the Visual Basic scripts on that agent’s host. If you need to do this, contact VMware customer support.