ubuntu-zfs

Usage

Edit ansible/vars.yml with your desired settings.
Run packer build -on-error=ask ubuntu-zfs-{{ mbr || efi }}.json to test the playbook in a Virtualbox machine.
The last provisioner is simply a shell provisioner that runs false, so you can examine the resulting system once the playbook has completed.
Playbook hasn't yet been tested on real hardware, will report back with more commits
- it should go without saying, but trying to run this on real hardware will result in data loss

zfsprep_zap_disks: true - forcibly nuke any partitions on existing disks
zfsprep_legacy_device_nodes - set to true to use /dev/sdX device names instead of by-id
zfsprep_root_pool - root pool name
zfsprep_data_pool - data pool name (separate from root pool)
zfsprep_efi: true - Use EFI layout, install grub-efi instead of grub-pc. Set to false to install grub-pc instead
zfsprep_luks - LUKS support
zfsprep_luks_flags - flags to pass to luksFormat
zfsprep_luks_passphrase - passphrase for luksFormat/luksOpen
zfsprep_hostname - short and FQDN hostnames to configure in the target OS
zfsprep_root_disks - target disks for root pool
zfsprep_data_disks - target disks for data pool
zfsprep_root_pool_type - pool type for root pool
zfsprep_data_pool_type - pool type for data pool
zfsprep_extra_locales - list of extra locales to install alongside en_US.UTF-8
zfsprep_lang - LANG to set in /etc/default/locale
zfsprep_timezone - timezone to set in resulting OS (defaults to UTC)

a few more in ansible/roles/01-system-prep/defaults/main.yml