ansible-server/roles/base/tasks/monitoring.yml

---
- name: install prometheus node exporter
  apt:
    name: prometheus-node-exporter
    state: present

- name: set node exporter config
  lineinfile:
    path: /etc/default/prometheus-node-exporter
    regexp: '^ARGS='
    line: ARGS="--web.listen-address={{ vpn.v4.address }}:9100"
  notify: restart-node-exporter