Comment by master_crab

Don’t do K8s on Pis. The Pis will spend the majority of their horsepower running etcd, CNI of choice, other essential services (MetalLB, envoy, etc). You’ll be left with a minimal percentage of resources for the pods that actually do things you need outside the cluster.

And don’t get me started on if you intend to run any storage solutions like Rook-Ceph on cluster.