### Locale / Keyboard
d-i debian-installer/locale string en_US.UTF-8
d-i keyboard-configuration/xkb-keymap select us

### Network (DHCP)
d-i netcfg/choose_interface select auto
d-i netcfg/get_hostname string debian
d-i netcfg/get_domain string local

### Mirror
d-i mirror/country string manual
d-i mirror/http/hostname string deb.debian.org
d-i mirror/http/directory string /debian
d-i mirror/http/proxy string

### User
d-i passwd/root-login boolean false
# d-i passwd/root-password password 14881488
# d-i passwd/root-password-again password 14881488
d-i passwd/user-fullname string Packer User
d-i passwd/username string packer
d-i passwd/user-password password 14881488
d-i passwd/user-password-again password 14881488
d-i user-setup/allow-password-weak boolean true

### Time
d-i clock-setup/utc boolean true
d-i time/zone string UTC

### Partitioning (LVM expert: /boot + VG vg0 + LV swap + LV root=rest)
d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string lvm

# если на диске были старые LVM/RAID — снести без вопросов
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-md/confirm boolean true
d-i partman-md/confirm_nooverwrite boolean true

# имя VG фиксируем
d-i partman-auto-lvm/new_vg_name string vg0
d-i partman-auto-lvm/guided_size string max

# рецепт разметки
d-i partman-auto/choose_recipe select boot-root-lvm-swap
d-i partman-auto/expert_recipe string                         \
  boot-root-lvm-swap ::                                        \
    512 512 1024 ext4                                          \
      $primary{ } $bootable{ }                                 \
      method{ format } format{ }                               \
      use_filesystem{ } filesystem{ ext4 }                     \
      mountpoint{ /boot }                                      \
    .                                                          \
    1024 1024 -1 lvm                                           \
      $primary{ }                                              \
      method{ lvm } device{ /dev/sda }                         \
      vg_name{ vg0 }                                           \
    .                                                          \
    2048 2048 2048 linux-swap                                  \
      $lvmok{ }                                                \
      in_vg{ vg0 } lv_name{ swap }                             \
      method{ swap } format{ }                                 \
    .                                                          \
    4096 4096 -1 ext4                                          \
      $lvmok{ }                                                \
      in_vg{ vg0 } lv_name{ root }                             \
      method{ format } format{ }                               \
      use_filesystem{ } filesystem{ ext4 }                     \
      mountpoint{ / }                                          \
    .

# подтверждения без интерактива
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman/choose_partition select finish
d-i partman/confirm_write_new_label boolean true
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true

### Packages
tasksel tasksel/first multiselect standard, ssh-server
d-i pkgsel/include string sudo openssh-server cloud-init qemu-guest-agent ca-certificates curl
popularity-contest popularity-contest/participate boolean false

### Bootloader
d-i grub-installer/only_debian boolean true
d-i grub-installer/bootdev string /dev/sda

# debconf for grub-pc package (this is the screen you see)
d-i grub-pc/install_devices multiselect /dev/sda
d-i grub-pc/install_devices_empty boolean false

### Late command (самое важное)
d-i preseed/late_command string \
  in-target usermod -aG sudo packer; \
  echo 'packer ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/packer; \
  chmod 440 /target/etc/sudoers.d/packer;

### Finish
d-i finish-install/reboot_in_progress note