The work lappy runs ubuntu with zfs on root, and it's pretty seamless, I'm very much onboard with it having boot environments! (zsys)
I'd love to see automated ZFS-on-root setup, but suspect that'll have to come from Canonical if we ever get it.
There are third party scripts to accomplish this. I would look at https://github.com/saveriomiroddi/zfs-installer. The only reason I have not used it is that I had already written my own https://github.com/HankB/Linux_ZFS_Root. And in this case, better the devil I know. (I'm presently updating my script to follow the most recent instructions at https://github.com/openzfs/zfs/wiki/Debian-Buster-Root-on-ZF...)
ZFS-installer appears to be more mature and is seeing more effort than mine. Perhaps I should give it a try.
libze_util_temporary_mount would be a good candidate for using (or being replaced by?) the recently-introduced zfs_mount_at in libzfs once that's widely available enough. That was a fairly trivial addition to libzfs that was initially made to support libbe's be_mount(), which previously used the effectively non-portable amount() [post-mortem: should read zmount, but autocorrect is alwayscorrect]
Thanks for the tip, the temporary mounting seems a bit like a hack so that's good to know there's a better option.
I only know how to use the systemd-ask-password hack to decrypt non-root datasets, but can’t get my head around how that would work with fully encrypted root dataset.
