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

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

# TODO: add auth
#
# Create the file --web.config=/etc/node_exporter/config.yaml
# and add --web.config=/etc/node_exporter/config.yaml to 
# the args in /etc/default/prometheus-node-exporter

- name: Setup the arguments for node-exporter
  template:
    src: prometheus-node-exporter
    dest: /etc/default/prometheus-node-exporter
    owner: root
    group: root
    mode: '0644'
  notify: Restart prometheus-node-exporter
  vars:
    args:
      - name: web.listen-address
        value: "{{ lan_address }}:9100"
#      - name: web.config
#        value: /etc/node_exporter/config.yaml