custom.template.json

{
  "variables": {
    "client_id": "{{env `client_id`}}",
    "client_secret": "{{env `client_secret`}}",
    "tenant_id": "{{env `tenant_id`}}",
    "resource_group_name": "{{env `resource_group_name`}}",
    "managed_image_name": "{{env `managed_image_name`}}",
    "script_path": "{{template_dir}}\\NodejsApp\\NodejsWebApp1\\Deploy\\windows",
    "script_name": "deployNodejsApp.ps1",
    "script_arguments": "{{env `script_arguments`}}",
    "package_path": "{{template_dir}}\\NodejsApp\\NodejsWebApp1",
    "package_name": "NodejsWebApp1",
    "drop-location": ""
  },
  "builders": [{
        "type": "azure-arm",
        "client_id": "{{user `client_id`}}",
        "client_secret": "{{user `client_secret`}}",
        "managed_image_resource_group_name": "{{user `resource_group_name`}}",
        "managed_image_name": "{{user `managed_image_name`}}",
        "subscription_id": "c00d16c7-6c1f-4c03-9be1-6934a4c49682",
        "tenant_id": "{{user `tenant_id`}}",
                
        "os_type": "Windows",
        "image_publisher": "MicrosoftWindowsServer",
        "image_offer": "WindowsServer",
        "image_sku": "2012-R2-Datacenter",
        "location": "southindia",
        "vm_size": "Standard_D3_v2",

        "communicator": "winrm",
        "winrm_use_ssl": "true",
        "winrm_insecure": "true",
        "winrm_timeout": "15m",
        "winrm_username": "packer"
    }],
    "provisioners": [{
            "type": "windows-shell",
            "inline": [
                "echo {{user `client_secret`}}",
                "echo {{user `drop-location`}}",
                "echo {{user `script_path`}}",
                "echo {{user `client_id`}}"
            ]
        },
        {
            "type": "powershell",
            "inline": [
                "if( Test-Path $Env:SystemRoot\\windows\\system32\\Sysprep\\unattend.xml ){ rm $Env:SystemRoot\\windows\\system32\\Sysprep\\unattend.xml -Force}",
                "& $Env:SystemRoot\\System32\\Sysprep\\Sysprep.exe /oobe /generalize /quit /quiet"
            ]
        }]
}