ubuntu autoinstall with btrfs subvolumes

user-data.yaml

#cloud-config
autoinstall:
  version: 1
  identity:
    hostname: btrbox
    password: "$6$exDY1mhS4KUYCE/2$zmn9ToZwTKLhCw.b4/b.ZRTIZM30JZ4QrOQ2aOXJ8yk96xpcCof0kxKwuX1kqLG/ygbJ1f8wxED22bTL4F46P0"
    username: ubuntu
  storage:
    config:
    ### drive
    - id: disk0
      type: disk
      ptable: gpt
      grub_device: true
      preserve: false
      wipe: superblock
    ### partitions
    - id: efi_partition
      type: partition
      size: 512MB
      device: disk0
      flag: boot
      grub_device: true
      preserve: false
    - id: swap_partition
      type: partition
      size: 8GB
      device: disk0
      flag: swap
      preserve: false
    - id: root_partition
      type: partition
      size: -1
      device: disk0
      preserve: false
    ### format and mount efi partition
    - id: efi_format
      type: format
      fstype: fat32
      volume: efi_partition
      preserve: false
    - id: efi_mount
      type: mount
      path: /boot/efi
      device: efi_format
    ### format and mount swap partition
    - id: swap_format
      type: format
      fstype: swap
      volume: swap_partition
      preserve: false
    - id: swap_mount
      path: none
      type: mount
      device: swap_format
    ### format and mount root partition
    - id: root_format
      type: format
      fstype: btrfs
      volume: root_partition
      preserve: false
    - id: root_mount
      type: mount
      path: /
      device: root_format
  late-commands:
  - |
    set -ex
    EFI_DEV=$(awk '$2 == "/target/boot/efi" { print $1 }' /proc/mounts)
    ROOT_DEV=$(awk '$2 ~ "^/target$" { print $1 }' /proc/mounts)
    ROOT_UUID=$(blkid -o value $ROOT_DEV | head -n 1)
    awk '$2 ~ "^/target/" { print $2 }' /proc/mounts | xargs umount
    btrfs subvolume snapshot /target /target/rootfs
    mkdir /mnt/rootfs
    mount -o subvol=rootfs $ROOT_DEV /mnt/rootfs
    mount $EFI_DEV /mnt/rootfs/boot/efi
    mount -o bind /dev  /mnt/rootfs/dev
    mount -o bind /sys  /mnt/rootfs/sys
    mount -o bind /proc /mnt/rootfs/proc
    sed -i "/$ROOT_UUID/s/defaults/defaults,noatime,subvol=rootfs/" /mnt/rootfs/etc/fstab
    chroot /mnt/rootfs update-grub
    chroot /mnt/rootfs grub-install --efi-directory=/boot/efi
    find /target -mindepth 1 -maxdepth 1 -not -name rootfs -exec rm -rf '{}' \;
    btrfs subvolume create /target/home
    echo "/dev/disk/by-uuid/$ROOT_UUID /home btrfs defaults,noatime,subvol=home 0 0" >> /mnt/rootfs/etc/fstab

    

Hi @wpbrown

I have trailed this code for ubuntu 22.04.2 jammy. I got this error can you please suggest me what next?

In crash file content is below
First 50 lines

last 100 lines

Thanks in advance @wpbrown