templates/ubuntu1804_preseed.cfg.j2

#_preseed_V1
{#
SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
SPDX-License-Identifier: Apache-2.0
#}
# preseed docs: https://help.ubuntu.com/18.04/installation-guide/amd64/apbs04.html

# enable automatic install
d-i auto-install/enable boolean true

# ask only critical level questions
d-i debconf/priority select critical

# locale and keyboard
d-i debian-installer/locale string en_US.UTF-8
d-i console-setup/ask_detect boolean false
d-i keyboard-configuration/xkb-keymap select us

# clock
d-i clock-setup/utc boolean true
d-i time/zone string Etc/UTC
d-i clock-setup/ntp boolean true
d-i clock-setup/ntp-server string ntp.ubuntu.com

# network and hostname
d-i netcfg/choose_interface select auto
d-i netcfg/hostname string {{ item['hostname'] }}
d-i netcfg/get_domain string {{ item['domain'] }}
d-i hw-detect/load_firmware boolean true

## Storage
# overwrite previous partitions
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-md/confirm boolean true

# use lvm
d-i partman-auto/method string lvm
d-i partman-auto/init_automatically_partition select biggest_free
d-i partman-auto-lvm/guided_size string max
d-i partman-auto-lvm/new_vg_name string primary

# use gpt
d-i partman-basicfilesystems/choose_label string gpt
d-i partman-basicfilesystems/default_label string gpt
d-i partman-partitioning/choose_label string gpt
d-i partman-partitioning/default_label string gpt
d-i partman/choose_label string gpt
d-i partman/default_label string gpt

# use ext4
d-i partman/default_filesystem string ext4

# partitioning
d-i partman-auto/choose_recipe select atomic
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/alignment select optimal
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true

### Do NOT install on the USB stick(!)
#
# The Debian installer will install on the first disk it finds which can
# sometimes be the USB stick itself. Work around this by rolling our own auto
# detect logic which disallows installing on USB devices.
#
# Also, fix issue with grub hang on install
#  https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1663645
d-i partman/early_command string \
  USBDEV_LIST="$(mktemp)"; \
  list-devices usb-partition | sed "s/\(.*\)./\1/" > "$USBDEV_LIST"; \
  BOOTDEV="$(list-devices disk | grep -vf "$USBDEV_LIST" | head -n 1)"; \
  debconf-set partman-auto/disk "$BOOTDEV"; \
  debconf-set grub-installer/bootdev "$BOOTDEV"; \
  while /bin/true; do sleep 0.01; rm -f /target/etc/grub.d/30_os-prober; done &

d-i grub-installer/only_debian boolean true

## Software
# install mirror
d-i mirror/country string manual
d-i mirror/protocol select http
d-i mirror/http/hostname string us.archive.ubuntu.com
d-i mirror/http/directory string /ubuntu
d-i mirror/http/proxy string

# Use the HWE kernel
d-i base-installer/kernel/image select linux-generic-hwe-18.04
base-installer base-installer/kernel/image select linux-generic-hwe-18.04

# install openssh and python3
d-i pkgsel/include string openssh-server python3

# don't install any predefined package groups
d-i tasksel/first multiselect none

# upgrade all packages on install
d-i pkgsel/upgrade select full-upgrade

# don't allow root login over SSH
openssh-server openssh-server/permit-root-login boolean true
openssh-server openssh-server/password-authentication boolean true

# don't automatically install updates on running system
pkgsel pkgsel/update-policy select none

# verbose boot, no splashscreen
d-i debian-installer/quiet boolean false
d-i debian-installer/splash boolean false

## Users
# disable root account
d-i passwd/root-login boolean false
d-i passwd/root-password-crypted password !!

# create user
d-i passwd/username string onfadmin
d-i passwd/user-fullname string ONFAdmin
d-i passwd/user-password-crypted password {{ preseed_onfadmin_pw_crypt }}

# add SSH pubkey key to user, secure SSHd
d-i preseed/late_command string \
  in-target mkdir -p --mode=0700 /home/onfadmin/.ssh ;\
  in-target sh -c 'echo "{{ preseed_onfadmin_ssh_pubkey }}" > /home/onfadmin/.ssh/authorized_keys';\
  in-target chmod 0600 /home/onfadmin/.ssh/authorized_keys;\
  in-target chown -R onfadmin:onfadmin /home/onfadmin/.ssh;\
  in-target sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin no/g' /etc/ssh/sshd_config;\
  in-target sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/g' /etc/ssh/sshd_config;

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