Implement livebox.

livebox.yml

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+## This playbook deploys the LiveBox.
+##
+## The LiveBox provides Debian Live and Installer images on top
+## of an already existing network with minimal modifications to
+## existing infrastructure.  It does not provide DHCP; the idea
+## is to chainload the LiveBox' menu (iPXE or Grub) from PXE
+## infrastructure already in place.
+##
+## To chainload the LiveBox in iPXE use:
+##  > item livebox Chainload Menu from LiveBox
+##  > …
+##  > :livebox chain tftp://livebox.lan/d-i/n-a/menu.ipxe
+##
+## To chainload the LiveBox in Grub use:
+##  > menuentry 'Chainload Menu from LiveBox' {
+##  >   configfile (tftp,livebox.lan)/d-i/n-a/grub/grub.cfg
+##  > }
+---
+- name: apply configuration to the livebox
+  hosts: all
+  remote_user: ansible
+  become: true
+
+  vars:
+    extra_pkgs:
+      - lighttpd
+      - nfs-kernel-server
+    extra_pkgs_bpo:
+      - atftpd
+      - di-netboot-assistant
+
+    live_images:
+      - iso: 'debian-live-11.3.0-amd64-gnome+nonfree.iso'
+        name: 'gnome'
+      - iso: 'debian-live-11.3.0-amd64-kde+nonfree.iso'
+        name: 'kde'
+      - iso: 'debian-live-11.3.0-amd64-standard+nonfree.iso'
+        name: 'standard-cli'
+    live_url: 'https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/11.3.0-live+nonfree/amd64/iso-hybrid/'
+    di_dist: "{{ ansible_distribution_release }}"
+    di_version: "{{ ansible_distribution_major_version }}"
+    di_pkg: "debian-installer-{{ di_version }}-netboot-amd64"
+    boot_params:
+      - boot=live
+      - netboot=nfs
+      - components
+      - locales=de_DE.UTF-8
+      - keyboard-layouts=de
+      - quiet
+      - splash
+#      - noroot
+
+    ansible_python_interpreter: "/usr/bin/python3"
+
+  pre_tasks:
+    - name: preseed atftpd
+      debconf:
+        name: atftpd
+        question: atftpd/basedir
+        value: /var/lib/tftpboot
+        vtype: string
+
+  roles:
+    - up2date_debian
+    - netbootinstaller
+    - aptcacher
+    - debianlive