Hello Community, I came across this Azure Built in Policy: ( Compute section under Policy) Only approved VM extensions should be installed In order to prepare and apply this in my production environment, I infer that we have the following command to list all AVAILABLE extensions in a particular region ie eastus below(across Windows and Linux VMs): az vm extension image list --location eastus --output table Ref: here and here But,in order to know what extensions are currently in use, do we have any command to check this(across tenant VMs)? The below command mandatorily requires a particular RG and VM name: `az vm extension list --vm-name

List all vm 'extensions' used across azure tenant(across multiple VMs)

Accepted answer

Luke Murray 11,246 MVP

I don't believe theres a CLI or PowerShell command to do that directory, however, this PowerShell script will look through all your Virtual Machines and export the extensions to a table:

# Connect to Azure
Connect-AzAccount

# Get all virtual machines
$vms = Get-AzVM

# Create an array to store the extension data
$extensionData = @()

# Loop through each virtual machine and get its extensions
foreach ($vm in $vms) {
    $vmName = $vm.Name
    $resourceGroup = $vm.ResourceGroupName
    $extensions = Get-AzVMExtension -ResourceGroupName $resourceGroup -VMName $vmName
    foreach ($extension in $extensions) {
        $extensionData += [PSCustomObject]@{
            VirtualMachine = $vmName
            ExtensionName = $extension.Name
            Publisher = $extension.Publisher
            Version = $extension.Version
            ProvisioningState = $extension.ProvisioningState
        }
    }
}

# Display the extension data in a table
$extensionData | Format-Table -AutoSize

Neena Sharma 25 Reputation points

2023-07-02T08:51:06.5933333+00:00

Thank you very much,this helps.
Aditya Garg 61 Reputation points

2023-07-02T10:40:44.8833333+00:00

@Luke Murray Would this be tenant wide or its per subscription?
Luke Murray 11,246 Reputation points MVP

2023-07-02T19:20:21.5833333+00:00

Per subscription, you can add a foreach subscription - into the loop if required, to connect to each subscription and get the data.

Aditya Garg 61

@Luke Murray Pls correct me if I missed something:

# Connect to Azure
Connect-AzAccount

# Get all Subscriptions
$subscriptions=Get-AzSubscription

# Create an array to store the extension data
$extensionData = @()

#Loop through each subscription
foreach ($subscription in $subscriptions) {

#Set the current scope/context to a subscription
Set-AzContext -Subscription $subscription

# Get all virtual machines
$vms = Get-AzVM
# Loop through each virtual machine and get its extensions
foreach ($vm in $vms) {
    $vmName = $vm.Name
    $resourceGroup = $vm.ResourceGroupName
    $extensions = Get-AzVMExtension -ResourceGroupName $resourceGroup -VMName $vmName
    foreach ($extension in $extensions) {
        $extensionData += [PSCustomObject]@{
            VirtualMachine = $vmName
            ExtensionName = $extension.Name
            Publisher = $extension.Publisher
            Version = $extension.Version
            ProvisioningState = $extension.ProvisioningState
        }
    }
}
}

# Display the extension data in a table
$extensionData | Format-Table -AutoSize

Luke Murray 11,246 MVP

Yep, something like this (you would need to test it, I haven't had the chance to test this):

# Connect to Azure
Connect-AzAccount

# Get all Azure subscriptions
$subIds = Get-AzSubscription | Select-Object -ExpandProperty SubscriptionId

# Create an array to store the extension data
$extensionData = @()

# Loop through each subscription
foreach ($subId in $subIds) {
    Write-Host "Processing subscription: $subId"
    Set-AzContext -SubscriptionId $subId 

    # Get all virtual machines in the subscription
    $vms = Get-AzVM

    # Loop through each virtual machine and get its extensions
    foreach ($vm in $vms) {
        $vmName = $vm.Name
        $resourceGroup = $vm.ResourceGroupName
        $extensions = Get-AzVMExtension -ResourceGroupName $resourceGroup -VMName $vmName
        foreach ($extension in $extensions) {
            $extensionData += [PSCustomObject]@{
                SubscriptionId = $subId
                VirtualMachine = $vmName
                ExtensionName = $extension.Name
                Publisher = $extension.Publisher
                Version = $extension.Version
                ProvisioningState = $extension.ProvisioningState
            }
        }
    }
}

# Display the extension data in a table
$extensionData | Format-Table -AutoSize

Neena Sharma 25

Thanks @Luke Murray I also note that in order to export the output from PS, we need to change the last line of above script:

$extensionData | Export-Csv -Path "path\to\folder\foldername\vmExtensions.csv" -NoTypeInformation

# Connect to Azure
Connect-AzAccount

# Get all Azure subscriptions
$subIds = Get-AzSubscription | Select-Object -ExpandProperty SubscriptionId

# Create an array to store the extension data
$extensionData = @()

# Loop through each subscription
foreach ($subId in $subIds) {
    Write-Host "Processing subscription: $subId"
    Set-AzContext -SubscriptionId $subId 

    # Get all virtual machines in the subscription
    $vms = Get-AzVM

    # Loop through each virtual machine and get its extensions
    foreach ($vm in $vms) {
        $vmName = $vm.Name
        $resourceGroup = $vm.ResourceGroupName
        $extensions = Get-AzVMExtension -ResourceGroupName $resourceGroup -VMName $vmName
        foreach ($extension in $extensions) {
            $extensionData += [PSCustomObject]@{
                SubscriptionId = $subId
                VirtualMachine = $vmName
                ExtensionName = $extension.Name
                Publisher = $extension.Publisher
                Version = $extension.Version
                ProvisioningState = $extension.ProvisioningState
            }
        }
    }
}

# Display the extension data in a table
$extensionData | Export-Csv -Path "path\to\folder\foldername\vmExtensions.csv" -NoTypeInformation

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List all vm 'extensions' used across azure tenant(across multiple VMs)

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