main.yml

---

- name: Test for Raspbian
  stat:
    path: /boot/cmdline.txt
  register: cmdline

- name: Activating cgroup on Raspbian
  lineinfile:
    path: /boot/cmdline.txt
    regexp: '^(.*rootwait)$'
    line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
    backrefs: true
  when:
    - cmdline.stat.path is defined
    - ansible_facts.architecture is search("arm")
  register: boot_cmdline

- name: Rebooting on Raspbian
  reboot:
  when:
    - boot_cmdline | changed
    - ansible_facts.architecture is search("arm")