ansible/roles/prometheus-node/tasks/main.yml

---
- name: Install Prometheus node-exporter
  apt:
    update_cache: true
    name: prometheus-node-exporter
  register: apt_result
  retries: 3
  until: apt_result is succeeded

# Doesn't work on Debian Stretch
- name: Make Prometheus node-exporter listen on adm only
  when:
    - ansible_distribution_release != 'stretch'
  lineinfile:
    path: /etc/default/prometheus-node-exporter
    regexp: '^ARGS='
    line: "ARGS=\"--web.listen-address={{ ansible_fqdn }}:9100\""
  notify: Restart prometheus-node-exporter