Customization specifications are vCenter objects that contain a pre-defined set of conditions for Windows and Linux guest operating system settings.
You can add an existing vCenter customization specification to a vSphere machine resource YAML in a Cloud Assembly blueprint. Use the customization specification to add pre-defined guest operating system settings. The settings are applied when you deploy the blueprint.
The customization specification must exist on the vCenter that is used for during provisioning when the blueprint is deployed. If it does not, deployment fails.
The following example shows a Windows customization specification named
cloud-assembly-windows added to the blueprint YAML for a sample vSphere machine named
name: vsphere-blueprint-1 description: "Description for vsphere-blueprint-1" resources: VmOne: type: Cloud.vSphere.Machine properties: name: 'VmOne' cpuCount: 2 totalMemoryMB: 1024 imageRef: 'Template: ubuntu-16.04' customizationSpec: 'cloud-assembly-windows' resourceGroupName: '/Datacenters/Datacenter/vm/deployments'
For information about how to create customization specifications in vCenter, see:
Customization specification topics in vSphere product documentation such as Creating and Managing Customization Specifications.
External tutorials such as How to Create VMware Guest Customization Specification