Packer HCL template for VM with nested virtualization enabled

packer.pkr.hcl

  source "vsphere-iso" "centos7-base" {
    # vCenter settings
    vcenter_server              = var.vcenter_server
    username                    = var.vcenter_username
    password                    = var.vcenter_password
    insecure_connection         = true
    cluster                     = var.vcenter_cluster
    datacenter                  = var.vcenter_datacenter
    #host                       = var.vcenter_host
    datastore                   = var.vcenter_datastore
    convert_to_template         = false
    folder                      = var.vcenter_folder
    NestedHV                    = true

    configuration_parameters    = {
      "featMask.vm.hv.capable"  = "Min:1"
      "vhv.enable"              = "TRUE"
    }

    # VM Settings
    ip_wait_timeout             = "45m"
    ssh_username                = var.connection_username
    ssh_password                = var.connection_password
    ssh_timeout                 = "12h"
    ssh_port                    = "22"
    ssh_handshake_attempts      = "20"
    shutdown_timeout            = "15m"
    vm_version                  = var.vm_hardware_version
    iso_paths                   = [var.os_iso_path]
    iso_checksum                = var.iso_checksum
    vm_name                     = var.vm_name
    guest_os_type               = var.guest_os_type
    disk_controller_type        = ["pvscsi"]
    floppy_files                = ["boot_config/ks.cfg"]
    network_adapters {
      network                   = var.vm_network
      network_card              = var.nic_type
    }
    storage {
      disk_size                 = var.root_disk_size
      disk_thin_provisioned     = true
    }
    CPUs                        = var.num_cpu
    cpu_cores                   = var.num_cores
    RAM                         = var.vm_ram
    boot_wait                   = "5s"
    boot_command                = var.boot_command
  }

  build {
      sources = [
          "source.vsphere-iso.centos7-base",
      ]
      provisioner "shell" {
        execute_command = "echo '${var.connection_password}' | {{.Vars}} sudo -S -E sh -eux '{{.Path}}'" # Scripts requiring sudo
        scripts = [
            "scripts/vmware-tools.sh",
            "scripts/yum-update.sh",
            "scripts/cleanup-centos.sh",
            "scripts/clean-ssh-key.sh"
        ]
      }
  }