packer build -var-file=c:\packer\centos\variables.json c:\packer\centos\centos.json
openssl passwd -6
https://cloudinit.readthedocs.io/en/latest/
https://ubuntu.com/server/docs/install/autoinstall
https://www.packer.io/docs/builders/vsphere/vsphere-iso
touch /etc/cloud/cloud-init.disabled