---
- name: Enable Memory Cgroups on Raspberry Pi
  hosts: all_nodes
  become: true
  tasks:
    - name: Ensure memory cgroups are enabled in /boot/firmware/cmdline.txt
      lineinfile:
        path: /boot/firmware/cmdline.txt
        regexp: '(^.*$)'   # Match the entire existing line (everything in the file)
        line: '\1 cgroup_memory=1 cgroup_enable=memory'   # Append these parameters to the matched line
        backrefs: yes      # Use backreference to ensure existing content is preserved
      notify: Reboot Raspberry Pi

  handlers:
    - name: Reboot Raspberry Pi
      reboot:
        msg: "Rebooting to enable memory cgroups."
        connect_timeout: 5