---
- name: generate apt pin file for exporter-blackbox package
  when: prometheus_exporter_blackbox_version is defined
  copy:
    dest: "/etc/apt/preferences.d/prom-exporter-blackbox.pref"
    content: |
      Package: prom-exporter-blackbox
      Pin: version {{ prometheus_exporter_blackbox_version }}-1
      Pin-Priority: 1001

- name: remove apt pin file for exporter-blackbox package
  when: prometheus_exporter_blackbox_version is not defined
  file:
    path: "/etc/apt/preferences.d/prom-exporter-blackbox.pref"
    state: absent

- name: install apt packages
  apt:
    name: "prom-exporter-blackbox{% if prometheus_exporter_blackbox_version is defined %}={{ prometheus_exporter_blackbox_version }}-1{% endif %}"
    state: present
    allow_downgrade: yes
  notify: restart prometheus-blackbox-exporter

- name: create config directory
  file:
    path: /etc/prometheus/exporter/blackbox
    state: directory

- name: generate configuration
  template:
    src: config.yml.j2
    dest: /etc/prometheus/exporter/blackbox/config.yml
  notify: reload prometheus-blackbox-exporter

- name: generate systemd service unit
  template:
    src: service.j2
    dest: /etc/systemd/system/prometheus-blackbox-exporter.service
  notify: restart prometheus-blackbox-exporter

- name: make sure prometheus-blackbox-exporter is enabled and started
  systemd:
    name: prometheus-blackbox-exporter.service
    daemon_reload: yes
    state: started
    enabled: yes

- name: register exporter
  copy:
    content: |
      location = /blackbox {
          proxy_pass http://127.0.0.1:9115/metrics;
      }
      location = /blackbox/probe {
          proxy_pass http://127.0.0.1:9115/probe;
      }
    dest: /etc/prometheus/exporter/blackbox.locations
  notify: reload nginx