ext4 on vda, zfsroot on vdb fails

[Andreas Hasenack]

maas 2.4.0~beta1-6799-g391e5f16d-0ubuntu1
curtin 18.1-1-g45564eef-0ubuntu1

This vm node has a second disk, vdb, to which I added zfsroot and selected it to be mounted at /home. vda was left untouched.

Deployment failed with:
"""
curtin: Installation started. (18.1-1-g45564eef-0ubuntu1)

third party drivers not installed or necessary.

zfsroot Mountpoint entry for / has device=vda-part1_format, expected 'vdb-part1_format'

curtin: Installation failed with exception: Unexpected error while running command.

Command: ['curtin', 'block-meta', 'custom']

Exit code: 3

Reason: -

Stdout: zfsroot Mountpoint entry for / has device=vda-part1_format, expected 'vdb-part1_format'

Stderr: ''
"""

That being said, it's also my understanding that zfsroot is experimental, and, as the name seems to imply, meant only for "/", so maybe the UI should prevent these choices until it becomes more usable.