/etc/maas/preseeds/preseed_master is in maas-region-controller-min 1.5.4+bzr2294-0ubuntu1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | # MAAS - Ubuntu Server Installation
# * Minimal install
# * Cloud-init for bare-metal
# * Cloud-init preseed data
# Locale
d-i     debian-installer/locale string en_US.UTF-8
# No splash
d-i     debian-installer/splash boolean false
# Keyboard layout
d-i     console-setup/ask_detect        boolean false
d-i     console-setup/layoutcode        string us
d-i     console-setup/variantcode       string
# Network configuration
d-i     netcfg/get_nameservers  string
d-i     netcfg/get_ipaddress    string
d-i     netcfg/get_netmask      string 255.255.255.0
d-i     netcfg/get_gateway      string
d-i     netcfg/confirm_static   boolean true
# Local clock (set to UTC and use ntp)
d-i     clock-setup/utc boolean true
d-i     clock-setup/ntp boolean true
d-i     clock-setup/ntp-server  string ntp.ubuntu.com
d-i     time/zone string Etc/UTC
# Partitioning
d-i     partman/early_command string debconf-set partman-auto/disk `list-devices disk | head -n1`
d-i     partman-iscsi/mainmenu string finish
d-i     partman-auto/method string regular
d-i     partman-lvm/device_remove_lvm boolean true
d-i     partman-lvm/confirm boolean true
d-i     partman-md/device_remove_md boolean true
d-i     partman/confirm_write_new_label boolean true
d-i     partman/choose_partition        select Finish partitioning and write changes to disk
d-i     partman/confirm boolean true
d-i     partman/confirm_nooverwrite boolean true
d-i     partman/default_filesystem string ext4
# Enable this if you want to override to a specific kernel, such as
# linux-generic-lts-saucy, but Debian Installer should pick the right one based
# on the boot kernel.
#d-i     base-installer/kernel/image     string linux-server
# User Setup
d-i     passwd/root-login       boolean false
d-i     passwd/make-user        boolean true
d-i     passwd/user-fullname    string ubuntu
d-i     passwd/username         string ubuntu
d-i     passwd/user-password-crypted password !
d-i     passwd/user-uid         string
d-i     user-setup/allow-password-weak  boolean false
d-i     user-setup/encrypt-home         boolean false
d-i     passwd/user-default-groups      string adm cdrom dialout lpadmin plugdev sambashare
# APT
{{self.proxy}}
# By default the installer requires that repositories be authenticated
# using a known gpg key. This setting can be used to disable that
# authentication. Warning: Insecure, not recommended.
d-i debian-installer/allow_unauthenticated string false
# Lang
d-i     pkgsel/language-packs   multiselect en
d-i     pkgsel/update-policy    select none
d-i     pkgsel/updatedb boolean true
# Boot-loader
d-i     grub-installer/skip     boolean false
d-i     lilo-installer/skip     boolean false
d-i     grub-installer/only_debian      boolean true
d-i     grub-installer/with_other_os    boolean true
d-i     finish-install/keep-consoles    boolean false
d-i     finish-install/reboot_in_progress       note
# Eject cdrom
d-i     cdrom-detect/eject      boolean true
# Do not halt/poweroff after install
d-i     debian-installer/exit/halt      boolean false
d-i     debian-installer/exit/poweroff  boolean false
# maas client packages
{{self.client_packages}}
# maas preseed
{{self.preseed}}
# Post scripts.
{{self.post_scripts}}
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