View instance mix configurations

This article details how to view your instance mix configuration on a virtual machine scale set, including the virtual machine (VM) sizes and the allocation strategy.

Prerequisites

• Reader, or higher, role on the scale set resource, or the Microsoft.Compute/virtualMachineScaleSets/virtualMachines/read permission.
• A scale set using Flexible Orchestration Mode and instance mix.
• For REST deployments, use API Version 2024-11-01 or later.

View the instance mix configurations

Azure portal

1. Go to the virtual machine scale set you want to view.
2. In the Overview blade, locate the Properties section.
3. Under Size, view the VM sizes available in the scale set.
4. Under Management, view the Allocation strategy.

Azure CLI

Replace placeholders, such as <scaleSetName>, with your actual values.

View all instance mix properties

To display all properties in the skuProfile, run:

az vmss show --resource-group <resourceGroupName> --name <scaleSetName> --query "skuProfile"

Example output:

{
  "allocationStrategy": "CapacityOptimized",
  "vmSizes": [
    {
      "name": "Standard_D4s_v5"
    },
    {
      "name": "Standard_D4as_v5"
    }
  ]
}

View VM sizes

To display only the VM sizes, run:

az vmss show --resource-group <resourceGroupName> --name <scaleSetName> --query "skuProfile.vmSizes"

View allocation strategy

To display only the allocation strategy, run:

az vmss show --resource-group <resourceGroupName> --name <scaleSetName> --query "skuProfile.allocationStrategy"

PowerShell

View all instance mix properties

Get-AzVmss -ResourceGroupName "<resourceGroupName>" -VMScaleSetName "<scaleSetName>" | Select-Object -ExpandProperty skuProfile

View VM sizes

Get-AzVmss -ResourceGroupName "<resourceGroupName>" -VMScaleSetName "<scaleSetName>" | Select-Object -ExpandProperty skuProfile | Select-Object -ExpandProperty vmSizes

View allocation strategy

Get-AzVmss -ResourceGroupName "<resourceGroupName>" -VMScaleSetName "<scaleSetName>" | Select-Object -ExpandProperty skuProfile | Select-Object -ExpandProperty AllocationStrategy

Next steps

Learn how to update your instance mix enabled scale set.