Hi all!
I run an Apache CloudStack based IaaS cloud computing env (similar to say what AWS or GCP can do but all opensource and private) on a few Raspberry Pi4 4GB model nodes running Ubuntu 20.04 LTS 64-bit and KVM. I thought to share and start a thread around this project
Models with 4/8GB RAM allow the use-cases around IoT/edge computing that require running VMs on RaspberryPi4 which can be anything from a tradition VM or a modern k3s/k8s cluster and makes the underlying hardware flexible thanks to KVM based compute virtualisation. For storage (for hosting VM qcow2 disks) I use a Samsung T5 USB ssd drive.
I've blogged here how to DIY Ubuntu 20.04 + KVM based IaaS cloud with Apache CloudStack and RPi4:
https://rohityadav.cloud/blog/cloudstack-rpi4-kvm/
Hope this helps with your use-cases and projects!
Cheers.