#cloud-config
# Convert one attached data disk after cloud-init finishes.
# Edit TARGET below to an existing mount point or a stable /dev/disk/by-id path.
# Preservation is the default. Set ERASE=yes only for a disk you intend to wipe.
write_files:
  - path: /usr/local/sbin/zfsify-first-boot
    permissions: '0700'
    content: |
      #!/bin/bash
      set -Eeuo pipefail
      TARGET=/dev/disk/by-id/REPLACE_WITH_YOUR_VOLUME
      ERASE=no
      [[ $TARGET != / && $TARGET != *REPLACE_WITH* ]] || {
        echo 'Edit TARGET to identify the attached data disk explicitly.' >&2
        exit 1
      }
      install -d -m 700 /var/lib/zfsify
      touch /var/lib/zfsify/first-boot.started
      installer=$(mktemp /var/tmp/zfsify.XXXXXXXX.sh)
      trap 'rm -f "$installer"' EXIT
      curl --fail --silent --show-error --location --retry 5 \
        https://pirate.github.io/zfsify/reformat.sh -o "$installer"
      args=("$TARGET")
      case $ERASE in
        no) ;;
        yes) args=(--erase "$TARGET");;
        *) echo 'ERASE must be yes or no.' >&2; exit 1;;
      esac
      bash "$installer" --yes "${args[@]}"
  - path: /etc/systemd/system/zfsify-first-boot.service
    permissions: '0644'
    content: |
      [Unit]
      Description=Convert an attached data disk to ZFS
      Wants=network-online.target
      After=network-online.target cloud-final.service
      ConditionPathExists=!/var/lib/zfsify/first-boot.started
      [Service]
      Type=oneshot
      ExecStart=/usr/local/sbin/zfsify-first-boot
      TimeoutStartSec=infinity
      [Install]
      WantedBy=multi-user.target
runcmd:
  - [systemctl, daemon-reload]
  - [systemctl, enable, --now, --no-block, zfsify-first-boot.service]