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Assessment Module

The scripts in this module can be used to assess an already deployed SAP landscape to validate that it is built correctly following the published guidance. The checks include virtual machine configuration, storage configuration and network configuration.

SAP On Azure Sizing

Disks for SAP on Azure deployments provide information on which disk types are supported for the different Virtual Machine types.

Generic disk guidance for Azure can be found here: What disk types are available in Azure?

requirements:

  • Azure Subscription
  • PowerShell 5.1 or newer
  • PowerShell modules Posh-SSH and Az

Assessment Tests

The module consists of different functions that can be used to assess the Virtual Machines of your SAP Landscape

Get Virtual Machine Information

This function returns the pertinent Virtual Machine information.

Property Value
Name The name of the virtual machine
Resourcegroup The name of the resource group in which the Virtual Machine is deployed
Operating System The operating system of the Virtual Machine
Zone The availability zone (if any) in which the Virtual Machine is deployed
Size The Virtual Machine SKU
AvailabilitySet The availability set (if any) in which the Virtual Machine is deployed
Proximity Placement Group The proximity placement group set (if any) in which the Virtual Machine is deployed
Private IP The private IP of the virtual machine
Public IP The public IP of the virtual machine
VNet The name of the virtual network in which the virtual machine is deployed
Subnet The name of the virtual subnet in which the virtual machine is deployed
Accelerated Networking Indicates if accelerated networking is configured
Disk colocation Indicates if disk colocation is configured

Example

Import the module
Import-Module "./VMUtilities.psd1"
Get-VMInfo -ResourceGroupName test-rg -VirtualMachineName vm1

Get Network information for a Virtual Machine

This function returns the network information for a Virtual Machine.

Property Value
Name The name of the virtual machine
Private IP The private IP of the virtual machine
Public IP The public IP of the virtual machine
VNet The name of the virtual network in which the virtual machine is deployed
Subnet The name of the virtual subnet in which the virtual machine is deployed
Accelerated Networking Indicates if accelerated networking is configured

Example

    Import the module
    Import-Module "./VMUtilities.psd1"
    Get-NetworkInfo -ResourceGroupName test-rg -VirtualMachineName vm1

Get Disk information for a Virtual Machine

This function returns the disk information for a Virtual Machine.

Property Value
Name The name of the virtual machine
Disk Name The name of the disk
Lun The LUN of the disk
Caching The setting for caching for the disk
OSDisk Is the disk the operating system disk
WriteAcceleratorEnabled If Write Accelerator enabled for the disk
Size In GB The size of the disk
Type The type of the disk
SKU The SKU of the disk
Zone The zone (if any) of the disk

Example

    Import the module
    Import-Module "./VMUtilities.psd1"
    Get-DiskInfo -ResourceGroupName test-rg -VirtualMachineName vm1

Combining the modules and persisting the output

In order to get a more comprehensive overview of the settings you can use the code snippet below. The information will be persisted in 2 .csv files in the directory specified by the $outputDiroctory variable.

Example

    Import-Module .\VMUtilities.psd1

    $ResourceGroupName = "RGName"
    $subscriptionName = "My Azure"

    $suffix = (Get-Date).ToString("yyyyddMM_HHmm")
    $outputDirectory = "c:\work\code\sap\"

    if(-not (Test-Path $outputDirectory -PathType Container))
    {
        Write-Host -ForegroundColor Red -BackgroundColor White "Folder '" $outputDirectory "' does not exit please create it."
        exit
    }

    $csvFileNameVMs = $outputDirectory + "VirtualMachines_" + $suffix + ".csv"
    $csvFileNameDisks = $outputDirectory + "Disks_" + $suffix + ".csv"

    # Create variable for combining the informationfrom multiple virtual machines
    $VMInfos = @()
    $DiskInfos = @()

    # select subscription
    $Subscription = Get-AzSubscription -SubscriptionName $SubscriptionName
    if (-Not $Subscription) {
        Write-Host -ForegroundColor Red -BackgroundColor White "Sorry, it seems you are not connected to Azure or don't have access to the subscription. Please use Connect-AzAccount to connect."
        exit
    }

    Select-AzSubscription -Subscription $SubscriptionName 

    #Get a list of all VM's with a specific tag, in this case "SAP"
    $VMs = (Get-AzResource -ResourceGroupName $ResourceGroupName -Tag @{ System = "SAP" } -ResourceType Microsoft.Compute/virtualMachines).Name
    foreach ($vmName in $VMs) {
        $VMInfo = Get-VMInfo   -VirtualMachineName $vmName -ResourceGroupName $ResourceGroupName
        $VMInfos += $VMInfo

        $Disks = Get-DiskInfo -VirtualMachineName $vmName -ResourceGroupName $ResourceGroupName
        foreach ($diskInfo in $Disks) {
            $DiskInfos += $diskInfo
        }
    }

    $status = "Virtual Machine Information"
    Write-Host  $status -ForegroundColor Yellow

    Write-Output $VMInfos | Format-Table
    #Persist the information
    $VMInfos | export-csv -Path $csvFileNameVMs -NoTypeInformation
        
    $status = "Disks attached to the virtual machines"
    Write-Host  $status -ForegroundColor Yellow
    Write-Output $DiskInfos | Format-Table
    $DiskInfos | export-csv -Path $csvFileNameDisks -NoTypeInformation