packer template.json cis-windows-server-2016

template.json

{
  "variables": 
    {
      "gcp_project": "myproject"
    },
  "builders": 
    [
      {
        "type": "googlecompute",
        "project_id": "{{ user `gcp_project` }}",
        "source_image_project_id": "cis-public",
        "source_image": "cis-windows-server-2016-v1-1-0-2-level-1",
        "image_family": "my-windows-server-2016",
        "disk_size": "50",
        "image_name": "my-windows-server-2016-{{timestamp}}",
        "zone": "us-central1-a",
        "service_account_email": "packer@myproject.iam.gserviceaccount.com",
        "subnetwork": "mysubnetwork",
        "tags": ["winrm"],
        "state_timeout": "30m",
        "communicator": "winrm",
        "winrm_username": "packer",
        "winrm_use_ssl": true,
        "winrm_use_ntlm": true,
        "winrm_insecure": true,
        "pause_before_connecting": "10m",
        "metadata": {
          "sysprep-specialize-script-ps1": "../winrmconfig.ps1"
        }
      }
    ],
    "provisioners": [
      {
        "type": "powershell",
        "inline": 
        [          
          "Invoke-RestMethod -Headers @{'Metadata-Flavor'='Google'} -Uri 'http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/access-configs/0/external-ip' | Out-File -Append -Encoding utf8 C:/Windows/Temp/ip-address"   
        ]
        
      },
      {
        "type": "file",
        "direction": "download",
        "source": "C:/Windows/Temp/ip-address",
        "destination": "../../ansible/playbooks/eft-express/ip-address"
      }
  ]
}