geerlingguy.ansible-role-kubernetes/tasks/kubelet-setup.yml

---
- name: Check for existence of kubelet environment file.
  stat:
    path: '{{ kubelet_environment_file_path }}'
  register: kubelet_environment_file

- name: Set facts for KUBELET_EXTRA_ARGS task if environment file exists.
  set_fact:
    kubelet_args_path: '{{ kubelet_environment_file_path }}'
    kubelet_args_line: "{{ 'KUBELET_EXTRA_ARGS=' + kubernetes_kubelet_extra_args }}"
    kubelet_args_regexp: '^KUBELET_EXTRA_ARGS='
  when: kubelet_environment_file.stat.exists

- name: Set facts for KUBELET_EXTRA_ARGS task if environment file doesn't exist.
  set_fact:
    kubelet_args_path: '/etc/systemd/system/kubelet.service.d/10-kubeadm.conf'
    kubelet_args_line: "{{ 'Environment=\"KUBELET_EXTRA_ARGS=' + kubernetes_kubelet_extra_args + '\"' }}"
    kubelet_args_regexp: '^Environment='
  when: kubelet_environment_file.stat.exists == False

- name: Configure KUBELET_EXTRA_ARGS.
  lineinfile:
    path: '{{ kubelet_args_path }}'
    line: '{{ kubelet_args_line }}'
    regexp: '{{ kubelet_args_regexp }}'
    state: present
  register: kubelet_config_file

- name: Reload systemd unit if args were changed.
  systemd:
    state: restarted
    daemon_reload: yes
    name: kubelet
  when: kubelet_config_file is changed