k3s-ansible/roles/raspberrypi/tasks/prereq/Ubuntu.yml

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---
- name: Enable cgroup via boot commandline if not already enabled for Ubuntu on a Raspberry Pi
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lineinfile:
path: /boot/firmware/cmdline.txt
backrefs: yes
regexp: '^((?!.*\bcgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory\b).*)$'
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line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
notify: reboot