{
  "variables": {
    "client_id": "{{env `ARM_CLIENT_ID`}}",
    "client_secret": "{{env `ARM_CLIENT_SECRET`}}",
    "resource_group": "{{env `ARM_RESOURCE_GROUP`}}",
    "storage_account": "{{env `ARM_STORAGE_ACCOUNT`}}",
    "subscription_id": "{{env `ARM_SUBSCRIPTION_ID`}}"
  },
  "builders": [
    {
      "type": "azure-arm",
        
      "client_id": "{{user `client_id`}}",
      "client_secret": "{{user `client_secret`}}",
      "resource_group_name": "{{user `resource_group`}}",
      "storage_account": "{{user `storage_account`}}",
      "subscription_id": "{{user `subscription_id`}}",

      "capture_container_name": "images",
      "capture_name_prefix": "packer",

      "os_type": "Linux",
      "image_url": "https://my-storage-account.blob.core.windows.net/path/to/your/custom/image.vhd",

      "azure_tags": {
        "dept": "engineering",
        "task": "image deployment"
      },
        
      "location": "West US",
      "vm_size": "Standard_A2"
    }
  ],
  "provisioners": [{
      "execute_command": "chmod +x {{ .Path }}; {{ .Vars }} sudo -E sh '{{ .Path }}'",
      "inline": [
        "apt-get update",
        "apt-get upgrade -y",
        "/usr/sbin/waagent -force -deprovision+user && export HISTSIZE=0 && sync"
      ],
      "inline_shebang": "/bin/sh -x",
      "type": "shell"
    }]
}