Currently, EKS supports managed node groups, but these do not have support for spot instances. You could use the unmanaged node groups with Pulumi's EKS library, but these currently utilize a CloudFormation stack for AutoScalingGroup via Launch Configurations instead of Launch Templates, so it is not possible to get MixedInstancesPolicy to apply herek
This repo provides a minimal example for using Pulumi's AWS library to create an AutoScalingGroup with the MixedInstancesPolicy and integrating them with EKS.
The steps below are taken from https://github.com/pulumi/kubernetes-guides, but index.ts of step 3 (cluster configuration) has been modified to showcase the above example.
| AWS |
|---|
| Identity |
| Managed Infrastructure |
| Cluster Configuration |