An hour to upgrade a 20 node cluster doesn't seem unreasonable for me - when you are doing a graceful upgrade that includes moving workloads between nodes. I do

An hour to upgrade a 20 node cluster doesn't seem unreasonable for me - when you are doing a graceful upgrade that includes moving workloads between nodes. I don't know anything about rke. Might be interesting but it seems different enough from upstream Kubernetes that you have to learn new things. Seems to me a bit similar to Openshift 4 where the cluster manages the underlying machines.