We're looking to move away from VMware and are considering open-source virtualization solutions. Does anyone have recommendations for platforms that integrate seamlessly with Rancher and support node drivers for automating VM creation and configuration?

have you looked at harvester? #C01GKHKAG0K https://docs.harvesterhci.io/v1.4/

If you use #C060L985ZGC you can unlock a lot more, such as Kubevirt. But node drivers themselves, harvester has some nice integrations.

I tested harvester in dev environment. I would love to hear feedback from folks who run harvester in production environment.