boot-options

auto=true priority=critical debian-installer/locale=en_US.UTF-8 keyboard-configuration/layoutcode=us ubiquity/reboot=true languagechooser/language-name=English countrychooser/shortlist=US localechooser/supported-locales=en_US.UTF-8 boot=casper automatic-ubiquity initrd=/casper/initrd.lz quiet splash noprompt noshell preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ubuntu-16.04-preseed.cfg ---

gistfile1.txt

# Taken from http://askubuntu.com/questions/806820/

# Partitioning
# Old style using d-i command
#d-i partman-auto/disk string /dev/sda
#d-i partman-auto/method string regular
#d-i partman-lvm/device_remove_lvm boolean true
#d-i partman-md/device_remove_md boolean true
#d-i partman-auto/choose_recipe select atomic

# Newer ubiquity command
ubiquity partman-auto/disk string /dev/sda
ubiquity partman-auto/method string regular
ubiquity partman-lvm/device_remove_lvm boolean true
ubiquity partman-md/device_remove_md boolean true
ubiquity partman-auto/choose_recipe select atomic

# This makes partman automatically partition without confirmation
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true

# Locale
d-i debian-installer/locale string en_US.UTF-8
d-i console-setup/ask_detect boolean false
d-i console-setup/layoutcode string us

# Network
d-i netcfg/get_hostname string unassigned-hostname
d-i netcfg/get_domain string unassigned-domain
d-i netcfg/choose_interface select auto

# Clock
d-i clock-setup/utc-auto boolean true
d-i clock-setup/utc boolean true
d-i time/zone string US/Pacific
d-i clock-setup/ntp boolean true

# Packages, Mirrors, Image
d-i mirror/country string US
d-i apt-setup/multiverse boolean true
d-i apt-setup/restricted boolean true
d-i apt-setup/universe boolean true

# Users
d-i passwd/user-fullname string Packer User
d-i passwd/username string packer
d-i passwd/user-password-crypted password SECRET
d-i passwd/user-default-groups string adm audio cdrom dip lpadmin sudo plugdev sambashare video
d-i passwd/root-login boolean true
d-i passwd/root-password-crypted password SECRET
d-i user-setup/allow-password-weak boolean true

# Grub
d-i grub-installer/grub2_instead_of_grub_legacy boolean true
d-i grub-installer/only_debian boolean true
d-i finish-install/reboot_in_progress note

# Custom Commands
ubiquity ubiquity/success_command string \
  beep ;\
  echo "Installation successful!!!" ;\
  sleep 5

packer-template.json

{
  "description": "My VM Template",
  "builders": [
    {
      "type": "virtualbox-iso",
      "guest_os_type": "Ubuntu_64",
      "iso_url": "http://releases.ubuntu.com/16.04/ubuntu-16.04.2-desktop-amd64.iso",
      "iso_checksum": "0f3086aa44edd38531898b32ee3318540af9c643c27346340deb2f9bc1c3de7e",
      "iso_checksum_type": "sha256",
      "ssh_username": "packer",
      "ssh_password": "packer",
      "shutdown_command": "echo 'packer' | sudo -S shutdown -P now",
      "boot_wait": "5s",
      "boot_command": [
        "<enter><wait><esc><wait><f6><wait><esc>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "auto=true", 
        " priority=critical", 
        " debian-installer/locale=en_US.UTF-8", 
        " keyboard-configuration/layoutcode=us", 
        " ubiquity/reboot=true", 
        " languagechooser/language-name=English", 
        " countrychooser/shortlist=US", 
        " localechooser/supported-locales=en_US.UTF-8", 
        " boot=casper", 
        " automatic-ubiquity", 
        " initrd=/casper/initrd.lz", 
        " quiet", 
        " splash", 
        " noprompt", 
        " noshell", 
        " preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ubuntu-16.04-preseed.cfg",
        " ---",
        " <wait>",
        "<enter><wait>"
      ],
      "http_directory": "preseed"
    }
  ],
  "provisioners": [
    {
      "type": "shell",
      "inline": [
        "sleep 30",
        "sudo apt-get update",
        "sudo apt-get -y upgrade",
        "sudo apt-get -y dist-upgrade",
        "sudo apt-get -y install python3-pip python3-virtualenv"
      ]
    }
  ]
}