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/tasks/setup/Raspbian.yml

@@ -0,0 +1,27 @@
+---
+- name: Activating cgroup support
+  lineinfile:
+    path: /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 state=present
+
+- name: Flush iptables before changing to iptables-legacy
+  iptables:
+    flush: true
+
+- 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

roles/raspberrypi/tasks/setup/Rocky.yml

@@ -0,0 +1,9 @@
+---
+- name: Enable cgroup via boot commandline if not already enabled for Rocky
+  lineinfile:
+    path: /boot/cmdline.txt
+    backrefs: yes
+    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

roles/raspberrypi/tasks/setup/Ubuntu.yml

@@ -0,0 +1,21 @@
+---
+- name: Enable cgroup via boot commandline if not already enabled for Ubuntu on a Raspberry Pi
+  lineinfile:
+    path: /boot/firmware/cmdline.txt
+    backrefs: yes
+    regexp: '^((?!.*\bcgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory\b).*)$'
+    line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
+  notify: reboot
+
+- name: Install linux-modules-extra-raspi
+  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/setup/default.yml

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