Finding capacity for Spot VM's in my subscription

Question

I have a Kubernetes cluster that I'm trying to add a new node pool to.

I want to use Spot Instances, however I have tried about 6 different VM SKU's and validation always fails with;

The resource with id: '/subscriptions/REDACTED/resourceGroups/MC_innerloop_aks-az-k8s-kanp_westeurope/providers/Microsoft.Compute/virtualMachineScaleSets/aks-npuser01-41715184-vmss' failed validation with message: 'The requested size for resource '/subscriptions/REDACTED/resourceGroups/MC_innerloop_aks-az-k8s-kanp_westeurope/providers/Microsoft.Compute/virtualMachineScaleSets/aks-npuser01-41715184-vmss' is currently not available in location 'westeurope' zones '' for subscription 'REDACTED'. Please try another size or deploy to a different location or zones.

I have looked at the az vm list-skus feature of the Azure CLI - however it doesn't seem to cater for Spot Instances.

I have verified that;

1. I have Quota available in WestEurope for the VM SKU's as per the Portal Quota screen
2. I have Spot Instance Quota available in the subscription (20 unused).
3. I've tried with AZ's and Without.
4. I've tried EastUs region as well as WestEurope
5. I have tried using the Azure Portal to create the pool, as well as bicep
6. Creating a Node Pool of the same SKU + Region + Zone config (but without Spot) works fine

Whilst I can write a script to pull all available SKU's in Azure (from az vm list-skus), and iteratively try creating my Spot Node Pool it feels like there must be a better way.

Can someone advise a better method of finding an available Spot VM?

Answer 1

Hi,

Please confirm you are attempting to create Spot instance with a subscription offer type that is allowed to created Spot? For example, Pay-As-You-Go and Enterprise Agreement are two that I know are allowed to create Spot instances. Common types that are not allowed to create Spot are Visual Studio Enterprise/Professional subscriptions and Azure in Open.

https://learn.microsoft.com/en-us/azure/virtual-machines/spot-vms#limitations

Thanks.

-TP