ansible-role-k3s/tasks/pre_checks_unsupported_rootless.yml

---

- name: Check if newuidmap is available
  ansible.builtin.command:
    cmd: which newuidmap
  failed_when: false
  changed_when: false
  register: k3s_check_newuidmap_installed

- name: Check if /proc/sys/kernel/unprivileged_userns_clone exists
  ansible.builtin.stat:
    path: /proc/sys/kernel/unprivileged_userns_clone
  register: k3s_check_unprivileged_userns_exists

- name: Get the value of /proc/sys/kernel/unprivileged_userns_clone
  ansible.builtin.slurp:
    src: /proc/sys/kernel/unprivileged_userns_clone
  register: k3s_get_unprivileged_userns_clone
  when: k3s_check_unprivileged_userns_exists.stat.exists

- name: Set the value of k3s_get_unprivileged_userns_clone
  ansible.builtin.set_fact:
    k3s_get_unprivileged_userns_clone:
      content: "MQo="
  when: not k3s_check_unprivileged_userns_exists.stat.exists

- name: Get the value of /proc/sys/user/max_user_namespaces
  ansible.builtin.slurp:
    src: /proc/sys/user/max_user_namespaces
  register: k3s_get_max_user_namespaces

- name: Get the contents of /etc/subuid
  ansible.builtin.slurp:
    src: /etc/subuid
  register: k3s_get_subuid

- name: Get the contents of /etc/subgid
  ansible.builtin.slurp:
    src: /etc/subgid
  register: k3s_get_subgid

- name: Get current user subuid and subgid values
  ansible.builtin.set_fact:
    k3s_current_user_subuid: "{{ (k3s_get_subuid['content'] | b64decode).split('\n')
      | select('search', ansible_user_id) | first | default('UserNotFound:0:0') }}"
    k3s_current_user_subgid: "{{ (k3s_get_subgid['content'] | b64decode).split('\n')
      | select('search', ansible_user_id) | first | default('UserNotFound:0:0') }}"

- name: Check user namespaces kernel parameters are adequate
  ansible.builtin.assert:
    that:
      - k3s_get_unprivileged_userns_clone['content'] | b64decode | int == 1
      - ((k3s_get_max_user_namespaces['content'] | b64decode | int >= 28633) or (k3s_os_family != "redhat"))
      - k3s_current_user_subuid != "UserNotFound:0:0"
      - k3s_current_user_subgid != "UserNotFound:0:0"
      - k3s_current_user_subuid.split(':')[2] | int >= 65536
      - k3s_current_user_subgid.split(':')[2] | int >= 65536
      - ansible_env['XDG_RUNTIME_DIR'] is defined
      - k3s_check_newuidmap_installed.rc == 0
    success_msg: All kernel parameters passed
    fail_msg: >-
      Kernel parameters are not set correctly, please check
      https://github.com/rootless-containers/rootlesskit