[Compute] Add SpotPlus Priority Option to VM/VMSS Creation

[connercalhoun]

Preconditions

• No need to upgrade Python SDK or the Python SDK is ready.

Related command

az vm create / az vmss create
     --priority SpotPlus

Resource Provider

Microsoft.Compute/virtualMachines, Microsoft.Compute/virtualMachineScaleSets

Description of Feature or Work Requested

Adds Azure CLI support for SpotPlus VM / VMSS creation by allowing the SpotPlus option to the --priority flag during create commands.

• SpotPlus is a Spot-class priority. Instances are evictable and run at discounted rates, so --eviction-policy and  --max-price apply the same way and remain valid alongside it.
• SpotPlus is a distinct priority from Spot it must be sent through verbatim and not translated to Spot.
• Existing  --priority combination validation (e.g. rules that fire for non-Regular priorities) should include SpotPlus.

Minimum API Version Required

2026-04-01

Swagger PR link / SDK link

Azure/azure-rest-api-specs#42283

Request Example

VM Create: https://github.com/Azure/azure-rest-api-specs/blob/main/specification/compute/resource-manager/Microsoft.Compute/Compute/Compute/examples/2026-04-01/virtualMachineExamples/VirtualMachine_Create_WithSpotPlusPriority.json

Uniform VMSS Create: https://github.com/Azure/azure-rest-api-specs/blob/main/specification/compute/resource-manager/Microsoft.Compute/Compute/stable/2026-04-01/examples/virtualMachineScaleSetExamples/VirtualMachineScaleSet_Create_WithSpotPlusPriority.json

Flex VMSS Create: https://github.com/Azure/azure-rest-api-specs/blob/main/specification/compute/resource-manager/Microsoft.Compute/Compute/stable/2026-04-01/examples/virtualMachineScaleSetExamples/VirtualMachineScaleSet_Create_WithSpotPlusPriorityFlex.json

Target Date

2026-08-28

PM Contact

rohansacheti

Engineer Contact

cocalhoun

Additional context

Python SDK - This should be ready in the next few weeks.

[yonzhan]

Thank you for opening this issue, we will look into it.

[SahilArora92]

Hi Yong Zhang (@yonzhan) Any updates on this? as we need this in early october

[yonzhan]

Julie Zhu (@yanzhudd) to help review this request

[SahilArora92]

Thanks. Also this is the corresponding Powershell change: Azure/azure-powershell#30060 in review.