Drop support for CentOS, test Rocky and Debian in CI (#92)

* Test CentOS 7 in CI

* Drop support for CentOS, test on Rocky and Debian

* Fix reset playbook for Rocky Linux

* Fix typo

* Disable firewalld during testing

Co-authored-by: Techno Tim <timothystewart6@gmail.com>

roles/raspberrypi/defaults/main.yml

@@ -0,0 +1,6 @@
+---
+# Indicates whether the k3s prerequisites for Raspberry Pi should be set up
+# Possible values:
+#   - present
+#   - absent
+state: present

roles/raspberrypi/tasks/main.yml

@@ -47,13 +47,20 @@
     - raspberry_pi|default(false)
     - ansible_facts.lsb.description|default("") is match("Debian.*bullseye")
 
-- name: execute OS related tasks on the Raspberry Pi
+- name: execute OS related {{ action }} tasks on the Raspberry Pi
   include_tasks: "{{ item }}"
   with_first_found:
-    - "prereq/{{ detected_distribution }}-{{ detected_distribution_major_version }}.yml"
-    - "prereq/{{ detected_distribution }}.yml"
-    - "prereq/{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml"
-    - "prereq/{{ ansible_distribution }}.yml"
-    - "prereq/default.yml"
+    - "{{ action }}/{{ detected_distribution }}-{{ detected_distribution_major_version }}.yml"
+    - "{{ action }}/{{ detected_distribution }}.yml"
+    - "{{ action }}/{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml"
+    - "{{ action }}/{{ ansible_distribution }}.yml"
+    - "{{ action }}/default.yml"
+  vars:
+    action: >-
+      {% if state == "present" -%}
+      setup
+      {%- else -%}
+      teardown
+      {%- endif %}
   when:
     - raspberry_pi|default(false)

roles/raspberrypi/tasks/setup/Rocky.yml

@@ -1,5 +1,5 @@
 ---
-- name: Enable cgroup via boot commandline if not already enabled for Centos
+- name: Enable cgroup via boot commandline if not already enabled for Rocky
   lineinfile:
     path: /boot/cmdline.txt
     backrefs: yes

roles/raspberrypi/tasks/setup/Ubuntu.yml

@@ -6,8 +6,16 @@
     regexp: '^((?!.*\bcgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory\b).*)$'
     line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
   notify: reboot
-  when: not ansible_check_mode
 
 - name: Install linux-modules-extra-raspi
-  apt: name=linux-modules-extra-raspi state=present
-  when: (raspberry_pi) and (not ansible_check_mode)
+  apt:
+    name: linux-modules-extra-raspi
+    state: present
+
+- name: Teardown
+  when: state == "absent"
+  block:
+    - name: Remove linux-modules-extra-raspi
+      apt:
+        name: linux-modules-extra-raspi
+        state: absent

roles/raspberrypi/tasks/teardown/Raspbian.yml

@@ -0,0 +1 @@
+---

roles/raspberrypi/tasks/teardown/Rocky.yml

@@ -0,0 +1 @@
+---

roles/raspberrypi/tasks/teardown/Ubuntu.yml

@@ -0,0 +1,5 @@
+---
+- name: Remove linux-modules-extra-raspi
+  apt:
+    name: linux-modules-extra-raspi
+    state: absent

roles/raspberrypi/tasks/teardown/default.yml

@@ -0,0 +1 @@
+---