How to create a single node AKS cluster using a 1-year reserved instance?

Question

As the title says, I can't figure out how you're supposed to do this. The pricing calculator allows for it, so I'm assuming it's possible.

I've tried:

1) Creating a new cluster

2) Creating a vm and adding it to an existing cluster, then deleting the initial node (Tried with and without the scaleset option)

For #1, I see no options to add a reserved instance during cluster initialization. For #2, I see no options to add an existing vm to an existing aks cluster.

Anyone know how to do this?

Answer 1

After you buy an Azure Reserved Virtual Machine Instance, the reservation discount is automatically applied to virtual machines that match the attributes and quantity of the reservation. A reservation covers the compute costs of your virtual machines. Source

In the documentation you can see that this also applies to AKS.

In other words, you buy a reserved instance and after you create your AKS cluster selecting instances with the same size, the discount will be automatically applied.

A reservation discount applies to the base VMs that you purchase from the Azure Marketplace.

By Marketplace you can also read AKS.