Not able to generalize a VM for creating a image out of the VM.

[Ppkd2021]

Bicep version
run bicep --version via the Bicep CLI, az bicep version via the AZ CLI or via VS code by navigating to the extensions tab and searching for Bicep

Describe the bug
We are able to achieve certain configuration on a VM before taking the image through runvmcommands via powershell script and once we try to take image of the vm after that then using resource 'Microsoft.Compute/images@2021-11-01' it gives an error VM is not generalized.
Before taking the image we are running a powershell script to execute sysprep.exe with following arguments '/Generalize', '/oobe', '/mode:vm', '/shutdown' but still it gives the same above error.
We got to know that we need to run set the vm to generalized using azure PowerShell but after spending hours on internet and going through couple of open issues on bicep there is no way to call a PowerShell module or azure PowerShell command through bicep code.

To Reproduce
Steps to reproduce the behavior:

Additional context
We need to use image further in the scale set but we are stuck at generalizing the vm through bicep code in order to take the image of the virtual machine.
Any help is appreciated that resolves the above mentioned concern.

[brwilkinson]

Please consider look into Azure Image Builder for an automated process to build images.

https://docs.microsoft.com/en-us/azure/virtual-machines/image-builder-overview

• https://docs.microsoft.com/en-us/azure/templates/microsoft.compute/galleries?tabs=bicep
• https://docs.microsoft.com/en-us/azure/templates/microsoft.compute/galleries/images?tabs=bicep
• https://docs.microsoft.com/en-us/azure/templates/microsoft.compute/galleries/images/versions?tabs=bicep

There are multiple ways to manage this process, including via bicep.

step 1 - create a gallery

        "ImageGalleryInfo": [
          {
            "Name": "01",
            "description": "my image gallery"
          }
        ],

resource gallery 'Microsoft.Compute/galleries@2021-07-01' = [for (gallery,index) in ImageGalleryInfo : if(imgGallery[index].match) {
  name: '${DeploymentURI}gallery${gallery.Name}'
  location: resourceGroup().location
  properties: {
    // sharingProfile: {
    //   permissions: 'Private'
    // }
    description: gallery.description
    identifier: {}
  }
}]

https://github.com/brwilkinson/AzureDeploymentFramework/blob/main/ADF/bicep/ImageGallery.bicep

step 2 - leverage image builder for the images and imagetemplates

        "ImageInfo": [
          {
            "imageName": "vmss2019webnetcore5",
            "GalleryName": "01",
            "description": "vmss windows 2019 web server .Net Core",
            "osType": "Windows",
            "identifier": {
              "offer": "WindowsServer",
              "sku": "Win2019",
              "role": "IMG5"
            }
          }
        ],
        // current locations https://docs.microsoft.com/en-us/azure/virtual-machines/linux/image-builder-json#location
        "imageTemplatesInfo": [
          {
            "imageName": "vmss2019webnetcore5",
            "galleryName": "01",
            "vmSize": "Standard_D4s_v3",
            "osDiskSizeGB": 127,
            "ibLocation": "WestCentralUS",
            "deployTimeoutmin": 360,
            "deployOnce": 1,
            "buildNow": 1,
            "PublishNow": 0
          }
        ]

resource Gallery 'Microsoft.Compute/galleries@2021-07-01' existing = [for (img,index) in ImageInfo : {
  name: '${DeploymentURI}gallery${img.GalleryName}'
}]

resource IMG 'Microsoft.Compute/galleries/images@2021-07-01' = [for (img,index) in ImageInfo : {
  name: image[index].imageName
  parent: Gallery[index]
  location: resourceGroup().location
  properties: {
    description: img.imageName
    osType: OSType[img.OSType].OS
    osState: 'Generalized'
    hyperVGeneration: contains(OSType[img.OSType].imageReference.sku,'g2') ? 'V2' : 'V1'
    identifier: {
      publisher: '${DeploymentURI}_${image[index].imageName}'
      offer: OSType[img.OSType].imagereference.offer
      sku: OSType[img.OSType].imagereference.sku
    }
  }
}]

https://github.com/brwilkinson/AzureDeploymentFramework/blob/main/ADF/bicep/ImageBuilder.bicep

This is a Azure Tool, based on packer, you can customize your images in many ways

e.g. https://github.com/brwilkinson/AzureDeploymentFramework/blob/main/ADF/bicep/ImageBuilder.bicep#L108

[Ppkd2021]

@brwilkinson Thank you so much for pointing me to right direction.