ubuntu-unattended-upgrades/templates/50unattended-upgrades

// Automatically upgrade packages from these (origin:archive) pairs
Unattended-Upgrade::Allowed-Origins {
{% for line in unattended_allowed_origins %}
  {{ line }}
{% endfor %}
};

// List of packages to not update (regexp are supported)
Unattended-Upgrade::Package-Blacklist {
{% for line in unattended_package_blacklist %}
  {{ line }}
{% endfor %}
};

// This option allows you to control if on a unclean dpkg exit
// unattended-upgrades will automatically run
//   dpkg --force-confold --configure -a
// The default is true, to ensure updates keep getting installed
Unattended-Upgrade::AutoFixInterruptedDpkg "{{ unattended_auto_fix_interrupted_dpkg | to_json }}";

// Split the upgrade into the smallest possible chunks so that
// they can be interrupted with SIGUSR1. This makes the upgrade
// a bit slower but it has the benefit that shutdown while a upgrade
// is running is possible (with a small delay)
Unattended-Upgrade::MinimalSteps "{{ unattended_minimal_steps | to_json }}";

// Install all unattended-upgrades when the machine is shuting down
// instead of doing it in the background while the machine is running
// This will (obviously) make shutdown slower
Unattended-Upgrade::InstallOnShutdown "{{ unattended_install_on_shutdown | to_json }}";

// Send email to this address for problems or packages upgrades
// If empty or unset then no email is sent, make sure that you
// have a working mail setup on your system. A package that provides
// 'mailx' must be installed. E.g. "user@example.com"
Unattended-Upgrade::Mail "{{ unattended_mail }}";

// Set this value to "true" to get emails only on errors. Default
// is to always send a mail if Unattended-Upgrade::Mail is set
Unattended-Upgrade::MailOnlyOnError "{{ unattended_mail_only_on_error | to_json }}";

// Do automatic removal of new unused dependencies after the upgrade
// (equivalent to apt-get autoremove)
Unattended-Upgrade::Remove-Unused-Dependencies "{{ unattended_remove_unused_dependencies | to_json }}";

// Automatically reboot *WITHOUT CONFIRMATION*
//  if the file /var/run/reboot-required is found after the upgrade
Unattended-Upgrade::Automatic-Reboot "{{ unattended_automatic_reboot | to_json }}";

// Automatically reboot even if there are users currently logged in.
Unattended-Upgrade::Automatic-Reboot-WithUsers "{{ unattended_reboot_with_users | to_json }}";

// If automatic reboot is enabled and needed, reboot at the specific
// time instead of immediately
//  Default: "now"
Unattended-Upgrade::Automatic-Reboot-Time "{{ unattended_reboot_time }}";

// Enable logging to syslog. Default is False
Unattended-Upgrade::SyslogEnable "{{ unattended_syslog_enable | to_json }}";

// Specify syslog facility. Default is daemon
Unattended-Upgrade::SyslogFacility "{{ unattended_syslog_facility }}";