Nice article thanks. I like your use of for_each in the example, though for my use cases (setting up multiple clusters for Kubernetes classes) I'd do it differently.

I've hit significant issues when setting up clusters (10 to 15 clusters of 2 or 3 VMs each). I even went back to Proxmox+bash for a while !! But it seems that setting "full_clone" to false and also "discard" things become much more reliable.

My next step will be to build golden images with packer to lighten the provisioning step which was also causing problems.