Ubuntu autoinstall YAML file with custom disk partitioning (EFI, boot, root, backups)

autoinstall.yaml

autoinstall:
  
  version: 1

  source:
    id: ubuntu-desktop-minimal
  
  timezone: 'Europe/Berlin'
  
  locale: 'en_US.UTF-8'
  
  keyboard:
    layout: 'us'
    variant: ''
  
  identity:
    realname: "ubuntu"
    username: ubuntu
    password: "$6$_____j1" # Use 'openssl passwd -6' to generate a hash
    hostname: ubuntu
  
  ssh:
    install-server: true
    allow-pw: true
    
  codecs:
    install: true
    
  drivers:
    install: true
    
  storage:
    config:

      #---------------------------------------------------------------------
      # disks
      #---------------------------------------------------------------------

      - type: disk
        id: disk-0
        name: disk-0
        ptable: gpt
        wipe: superblock-recursive
        path: /dev/nvme0n1
        
      #---------------------------------------------------------------------
      # partitions
      #---------------------------------------------------------------------

      - type: partition
        id: esp-partition
        device: disk-0
        flag: boot
        # wipe: superblock-recursive
        grub_device: true # efi boot partition MUST be grub_device
        number: 1
        size: 1G

      - type: partition
        id: boot-partition
        device: disk-0
        # wipe: superblock-recursive
        number: 2
        size: 2G

      - type: partition
        id: root-partition
        device: disk-0
        # wipe: superblock-recursive
        number: 3
        size: 512G
        
      - type: partition
        id: backups-partition
        device: disk-0
        # wipe: superblock-recursive
        number: 4
        size: -1

      #---------------------------------------------------------------------
      # logical volumes
      #---------------------------------------------------------------------
      
      - type: lvm_volgroup
        id: root-volgroup
        name: vgroot
        devices:
          - root-partition

      - type: lvm_partition
        id: root-vlm-partition
        name: lvroot
        volgroup: root-volgroup
        # wipe: superblock-recursive
        size: 128G
        
      - type: lvm_partition
        id: swap-vlm-partition
        name: lvswap
        volgroup: root-volgroup
        # wipe: superblock-recursive
        size: 48G
        
      #---------------------------------------------------------------------
      # file systems
      #---------------------------------------------------------------------

      - type: format
        id: esp-format
        volume: esp-partition
        fstype: fat32

      - type: format
        id: boot-format
        volume: boot-partition
        fstype: ext4

      - type: format
        id: lvroot-format
        volume: root-vlm-partition
        fstype: ext4

      - type: format
        id: swap-format
        volume: swap-vlm-partition
        fstype: swap

      - type: format
        id: backups-format
        volume: backups-partition
        fstype: ext4

      #---------------------------------------------------------------------
      # mount points
      #---------------------------------------------------------------------

      - type: mount
        id: efi-mount
        device: esp-format
        path: /boot/efi
      
      - type: mount
        id: boot-mount
        device: boot-format
        path: /boot
      
      - type: mount
        id: root-mount
        device: lvroot-format
        path: /

      - type: mount
        id: swap-mount
        device: swap-format
        path: none

      #---------------------------------------------------------------------
      # better mount backups manually, because if a snapshot has it in fstab,
      # a system restore will fail to boot without errors if this partition
      # is not restored as well, which it typically will not be
      #---------------------------------------------------------------------
      #- type: mount
      #  id: backups-mount
      #  device: backups-format
      #  path: /media/backups