build.json

{
    "variables": {
      "sub_id": null,
      "client_id": null,
      "client_secret": null,
      "image_rg": "imagesRG",
      "shared_image_gallery": "gallery",
      "image_version": null,
      "vnet": "0.0.0.0",
      "vnet_subnet": "0.0.0.0",
      "vnet_rg": "NetworkRG",
      "vm_size": "Standard_D8as_v4",
      "loc": "westeurope",
      "build_image_update_definition_name": "image-def-update",
      "exclude_from_latest": "false"
    },
    "builders": [
      {
        "name": "build image",
        "type": "azure-arm",
        "os_type": "Windows",
        "subscription_id": "{{ user `sub_id`}}",
        "client_id": "{{ user `client_id`}}",
        "client_secret": "{{ user `client_secret`}}",
        "virtual_network_name": "{{ user `vnet`}}",
        "virtual_network_subnet_name": "{{ user `vnet_subnet`}}",
        "virtual_network_resource_group_name": "{{ user `vnet_rg`}}",
        "vm_size": "{{ user `vm_size`}}",
        "shared_image_gallery": {
          "subscription": "{{user `sub_id`}}",
          "resource_group": "{{ user `image_rg`}}",
          "gallery_name": "{{ user `shared_image_gallery`}}",
          "image_name": "{{ user `build_image_definition_name`}}",
          "image_version": "latest"
        },
        "managed_image_name": "{{ user `build_image_definition_name`}}",
        "managed_image_resource_group_name": "{{ user `image_rg`}}",
        "managed_image_storage_account_type": "Premium_LRS",
        "shared_image_gallery_destination": {
          "resource_group": "{{ user `image_rg`}}",
          "gallery_name": "{{ user `shared_image_gallery`}}",
          "image_name": "{{ user `build_image_update_definition_name`}}",
          "image_version": "{{ user `image_version`}}",
          "replication_regions": ["{{ user `loc`}}"],
          "exclude_from_latest": true
        },
        "shared_image_gallery_timeout": "2h",
        "location": "{{ user `loc`}}",
        "communicator": "winrm",
        "winrm_use_ssl": "true",
        "winrm_insecure": "true",
        "winrm_timeout": "3m",
        "winrm_username": "packer",
        "shared_gallery_image_version_exclude_from_latest": "{{ user `exclude_from_latest`}}"
      }
    ],
    "provisioners": [
      {
        "type": "powershell",
        "scripts": "{{ template_dir }}\\scripts\\Finalize-VM.ps1",
        "timeout": "60m"
      }
    ]
  }