Often you will be working out licensing costs and more often than not, you will need to know the number of vCores - as a baseline use the following script.

Get-AKSVCores.ps1

<#

.SYNOPSIS

    Calculates total vCores for each Azure Kubernetes Service (AKS) cluster listed in a CSV file.



.DESCRIPTION

    This script imports a CSV file containing AKS cluster information, iterates through each cluster, and calculates the total number of virtual cores (vCores) based on the node pools associated with each cluster. It requires Azure CLI and assumes that the user has the necessary permissions to access the AKS clusters and VM sizes.



.PARAMETER CsvFilePath

    Full path to the CSV file containing AKS cluster information. The CSV file should have columns named 'ClusterName', 'Subscription', and 'ResourceGroup'.



.PARAMETER VmLocation

    Azure region to get VM sizes for the calculation. Default is 'Australia East'.



.PARAMETER PerformAzureLogin

    Indicates whether the script should perform Azure login. Set to $true if Azure login is required within the script; otherwise, $false. Default is $false.



.EXAMPLE

    .\Get-AKSVCores.ps1 -CsvFilePath "C:\path\to\aks_clusters.csv" -VmLocation "Australia East" -PerformAzureLogin $true



    This example runs the script with the specified CSV file path, VM location, and performs Azure login within the script.



.INPUTS

    CSV file



.OUTPUTS

    Console output of each AKS cluster's name, subscription, resource group, and total vCores.



.NOTES

    Version:        1.0

    Author:         Romiko Derbynew

    Creation Date:  2024-01-22

    Purpose/Change: Get Total VCores for Clusters

#>



param(

    [Parameter(Mandatory = $true)]

    [string]$CsvFilePath,



    [Parameter(Mandatory = $false)]

    [string]$VmLocation = "Australia East",



    [Parameter(Mandatory = $false)]

    [bool]$PerformAzureLogin = $true

)



# Azure login if required

if ($PerformAzureLogin) {

    az login

}



# Import the CSV file

$aksClusters = Import-Csv -Path $CsvFilePath



Write-Host "ClusterName,Subscription,ResourceGroup,TotalVCores"



# Iterate through each AKS cluster

foreach ($cluster in $aksClusters) {

    # Set the current subscription

    az account set --subscription $cluster.Subscription



    # Logic to get the resource group

    $resourceGroup = $cluster.ResourceGroup



    # Get the node pools for the AKS cluster

    $nodePools = az aks nodepool list --resource-group $resourceGroup --cluster-name $cluster.ClusterName --query "[].{name: name, count: count, vmSize: vmSize}" | ConvertFrom-Json



    $totalVCores = 0



    # Iterate through each node pool and calculate total vCores

    foreach ($nodePool in $nodePools) {

        # Get the VM size details

        $vmSizeDetails = az vm list-sizes --location $VmLocation --query "[?name=='$($nodePool.vmSize)'].{numberOfCores: numberOfCores}" | ConvertFrom-Json

        $vCores = $vmSizeDetails.numberOfCores



        # Calculate total vCores for the node pool

        $totalVCores += $vCores * $nodePool.count

    }



    # Output the total vCores for the cluster

    Write-Host "$($cluster.ClusterName),$($cluster.Subscription),$($cluster.ResourceGroup),$totalVCores"

}

• Architecture/Technology
• DevOps