ansible/roles/prometheus/tasks/main.yml

---
- name: Install Prometheus Components
  apt:
    name:
      - prometheus
      - prometheus-alertmanager
      - prometheus-pushgateway
    state: latest
    update_cache: true
  register: apt_result
  retries: 3
  until: apt_result is succeeded

- name: Ensure the alert folder exist
  file:
    path: /etc/prometheus/alerts
    state: directory
    group: prometheus
    owner: prometheus
    mode: u=rwx,g=rx,o=rx

- name: Setup the prometheus config
  template:
    src: prometheus.yml
    dest: /etc/prometheus/prometheus.yml
    owner: prometheus
    group: prometheus
    mode: '0640'
  notify: Restart prometheus
  no_log: true

- name: Setup the arguments for node-exporter
  template:
    src: prometheus
    dest: /etc/default/prometheus
    owner: root
    group: root
    mode: '0644'
  notify: Restart prometheus
  vars:
    args:
      - name: web.listen-address
        value: "{{ lan_address }}:9090"