Public/Show-AksInfo.ps1
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Function Show-AksInfo { <# .SYNOPSIS Retrieves and displays AKS cluster information, including VNet details. .DESCRIPTION Fetches all AKS clusters in a given Azure subscription and retrieves their resource groups, associated virtual networks, and subnet details. This function is designed for Azure CNI-based AKS clusters. .PARAMETER SubscriptionId (Optional) Specifies the Azure subscription ID to use when querying AKS clusters and network details. If not provided, the function uses the currently active Azure subscription. .EXAMPLE Show-AksInfo Retrieves AKS cluster information using the currently active Azure subscription. .EXAMPLE Show-AksInfo -SubscriptionId "e432466e-7fb8-4734-a361-8d42befe77d5" Retrieves AKS cluster information from the specified Azure subscription. .OUTPUTS Displays a formatted table containing: - ClusterName: Name of the AKS cluster. - ResourceGroup: The resource group where the AKS cluster is deployed. - VNetResourceGroup: The resource group where the associated VNet is located. - VNetName: The name of the virtual network used by the AKS cluster. - SubnetName: The name of the subnet associated with the AKS cluster. - SubnetRange: The subnet’s address range. .NOTES - This function requires Azure CLI (`az`). - The user must be authenticated with Azure CLI before running this function. - Works only with AKS clusters configured with Azure CNI (not Kubenet). - Uses the first available node pool's `vnetSubnetId` as the source for networking details. .LINK https://learn.microsoft.com/en-us/cli/azure/aks https://learn.microsoft.com/en-us/cli/azure/network/vnet #> [CmdletBinding()] param ( [string]$SubscriptionId ) # Ensure Az CLI is installed if (-not (Get-Command az -ErrorAction SilentlyContinue)) { Write-Host "Azure CLI (az) is not installed. Please install it first." exit 1 } # Build AZ CLI subscription argument $subscriptionArg = @() if ($SubscriptionId) { $subscriptionArg = @("--subscription", $SubscriptionId) } # Get all AKS clusters in the specified or current subscription $aksClusters = az aks list @subscriptionArg --query "[].{name:name, resourceGroup:resourceGroup, agentPoolProfiles:agentPoolProfiles}" --output json | ConvertFrom-Json if (-not $aksClusters) { Write-Host "No AKS clusters found in the subscription." -ForegroundColor Red return } # Create an array to store results $results = @() $totalClusters = $aksClusters.Count $counter = 0 foreach ($aks in $aksClusters) { $counter++ $progressPercent = [math]::Round(($counter / $totalClusters) * 100) # Update progress bar Write-Progress -Activity "Gathering AKS Cluster Information" -Status "Processing: $($aks.name) ($counter of $totalClusters)" -PercentComplete $progressPercent if ($aks.agentPoolProfiles -and $aks.agentPoolProfiles.Count -gt 0) { $subnetId = $aks.agentPoolProfiles[0].vnetSubnetId if ($subnetId) { $vnetDetails = Get-VNetSubnetDetails -subnetId $subnetId if ($vnetDetails) { $subnetDetails = az network vnet subnet show --resource-group $vnetDetails.VNetResourceGroup --vnet-name $vnetDetails.VNetName --name $vnetDetails.SubnetName @subscriptionArg --query "{addressPrefix:addressPrefix}" --output json | ConvertFrom-Json # Add to results $results += [PSCustomObject]@{ ClusterName = $aks.name ResourceGroup = $aks.resourceGroup VNetResourceGroup = $vnetDetails.VNetResourceGroup VNetName = $vnetDetails.VNetName SubnetName = $vnetDetails.SubnetName SubnetRange = $subnetDetails.addressPrefix } } } } } # Clear the progress bar once done Write-Progress -Activity "Gathering AKS Cluster Information" -Status "Completed" -Completed # Display the table if ($results.Count -gt 0) { $results | Format-Table -AutoSize } else { Write-Host "No AKS clusters with VNet information found." -ForegroundColor Red } } # Function to extract VNet and Subnet details from a subnet ID function Get-VNetSubnetDetails { param ( [string]$subnetId ) if ($subnetId -match "/subscriptions/[^/]+/resourceGroups/([^/]+)/providers/Microsoft.Network/virtualNetworks/([^/]+)/subnets/([^/]+)") { return @{ VNetResourceGroup = $matches[1] VNetName = $matches[2] SubnetName = $matches[3] } } return $null } |