How to install an unattended vCenter
How to install an unattended vCenter (VCSA) server appliance?
You can use the CLI installer to perform a silent deployment of a vCenter Server appliance on an ESXi host or vCenter Server instance.
The CLI deployment process includes downloading the vCenter Server installer on a network virtual machine or physical server from which you want to perform the deployment, preparing a JSON configuration file with the deployment information, and running the deployment command.