ansible/roles/prometheus_node/tasks/main.yml

---
- name: Install prometheus-node-exporter
  apt:
    name:
      - prometheus-node-exporter
      - prometheus-node-exporter-collectors
    install_recommends: false  # Do not install smartmontools

- name: Configure prometheus-node-exporter
  template:
    src: default.j2
    dest: /etc/default/prometheus-node-exporter
    owner: root
    group: root
    mode: u=rw,g=r,o=r
  notify:
    - Restart prometheus-node-exporter

- name: Install smartmontools
  apt:
    name: smartmontools
  when:
    - "ansible_virtualization_role == 'host'"

- name: Create override directory
  file:
    path: /etc/systemd/system/prometheus-node-exporter.service.d
    state: directory
    owner: root
    group: root
    mode: u=rwx,g=rx,o=rx

- name: Override prometheus-node-exporter.service
  template:
    src: override.conf.j2
    dest: /etc/systemd/system/prometheus-node-exporter.service.d/override.conf
    owner: root
    group: root
    mode: u=rw,g=r,o=r
  notify:
    - Run daemon-reload
    - Restart prometheus-node-exporter

- name: Enable prometheus-node-exporter
  systemd:
    name: prometheus-node-exporter
    enabled: true
    state: started
...