Proxmox VE and ZFS over iSCSI on TrueNAS Scale: My steps to make it work.

I found a lot of searching and testing with people struggling on this, but I was able to make this work. I wanted to document my exact steps in the hope it helps someone else. I have a VM povisioned, working, with snapshots and migrations.

First, on TrueNAS Scale, I have a ZFS dataset with a bunch of space. Initially I wanted to create a zvol under it and limit the space for VM's, but interestingly this doesn't work, you get the error "parent is not a filesystem." I dunno, but mapping...

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