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

- name: Configure Prometheus
  template:
    src: prometheus/prometheus.yml.j2
    dest: /etc/prometheus/prometheus.yml
    mode: 0644
  notify: Restart Prometheus

- name: Configure Prometheus alert rules
  template:
    src: "prometheus/{{ item }}.j2"
    dest: "/etc/prometheus/{{ item }}"
    mode: 0644
  notify: Restart Prometheus
  loop:
    - alert.rules.yml
    - django.rules.yml

# We don't need to restart Prometheus when updating nodes
- name: Configure Prometheus nodes
  copy:
    content: "{{ [{'targets': prometheus.node_targets}] | to_nice_json }}"
    dest: /etc/prometheus/targets.json
    mode: 0644

# We don't need to restart Prometheus when updating nodes
- name: Configure Prometheus UPS SNMP devices
  copy:
    content: "{{ [{'targets': prometheus.ups_snmp_targets}] | to_nice_json }}"
    dest: /etc/prometheus/targets_ups_snmp.json
    mode: 0644

# We don't need to restart Prometheus when updating nodes
- name: Configure Prometheus Ubiquity Unifi SNMP devices
  copy:
    content: "{{ [{'targets': prometheus.unifi_snmp_targets}] | to_nice_json }}"
    dest: /etc/prometheus/targets_unifi_snmp.json
    mode: 0644
  when: prometheus.unifi_snmp_targets is defined

# We don't need to restart Prometheus when updating nodes
- name: Configure Prometheus NGINX targets
  copy:
    content: "{{ [{'targets': prometheus.nginx_targets}] | to_nice_json }}"
    dest: /etc/prometheus/targets_nginx.json
    mode: 0644
  when: prometheus.nginx_targets is defined

# We don't need to restart Prometheus when updating nodes
- name: Configure Prometheus Apache targets
  copy:
    content: "{{ [{'targets': prometheus.apache_targets}] | to_nice_json }}"
    dest: /etc/prometheus/targets_apache.json
    mode: 0644
  when: prometheus.apache_targets is defined

# We don't need to restart Prometheus when updating nodes
- name: Configure Prometheus Blackbox targets
  copy:
    content: "{{ [{'targets': prometheus.blackbox_targets}] | to_nice_json }}"
    dest: /etc/prometheus/targets_blackbox.json
    mode: 0644
  when: prometheus.blackbox_targets is defined

- name: Activate prometheus service
  systemd:
    name: prometheus
    enabled: true
    state: started

- name: Indicate role in motd
  template:
    src: update-motd.d/05-service.j2
    dest: /etc/update-motd.d/05-prometheus
    mode: 0755