Fix Raspberry tasks for Debian (#151)

* Fix Raspberry tasks for Debian

Signed-off-by: Rick <r.wagenaar@icloud.com>
Signed-off-by: Rick <rick@kcir.nl>

* Move debian yaml files

Signed-off-by: Rick <r.wagenaar@icloud.com>
Signed-off-by: Rick <rick@kcir.nl>

* Add task for Debian to install iptables

Signed-off-by: Rick <rick@kcir.nl>

* Add check for cmdline.txt path for Debian

Signed-off-by: Rick <rick@kcir.nl>

* Remove Debian11 tasks file

Signed-off-by: Rick <rick@kcir.nl>

---------

Signed-off-by: Rick <r.wagenaar@icloud.com>
Signed-off-by: Rick <rick@kcir.nl>
Co-authored-by: Rick <r.wagenaar@icloud.com>
Co-authored-by: Rick <rick@kcir.nl>

roles/raspberrypi/tasks/prereq/Debian.yml

@@ -0,0 +1,34 @@
+---
+- name: Check if /boot/firmware/cmdline.txt exists
+  stat:
+    path: /boot/firmware/cmdline.txt
+  register: boot_firmware_cmdline_txt
+
+- name: Activating cgroup support
+  lineinfile:
+    path: "{{ (boot_firmware_cmdline_txt.stat.exists) | ternary('/boot/firmware/cmdline.txt', '/boot/cmdline.txt') }}"
+    regexp: '^((?!.*\bcgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory\b).*)$'
+    line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
+    backrefs: true
+  notify: reboot
+
+- name: Install iptables
+  apt:
+    name: iptables
+
+- name: Flush iptables before changing to iptables-legacy
+  iptables:
+    flush: true
+  changed_when: false   # iptables flush always returns changed
+
+- name: Changing to iptables-legacy
+  alternatives:
+    path: /usr/sbin/iptables-legacy
+    name: iptables
+  register: ip4_legacy
+
+- name: Changing to ip6tables-legacy
+  alternatives:
+    path: /usr/sbin/ip6tables-legacy
+    name: ip6tables
+  register: ip6_legacy