- name: Install packages
  package:
    name:
      - prometheus

- name: Create directory for prometheus configs
  file:
    path: /etc/prometheus/conf.d
    state: directory

- name: Configure prometheus retention time
  when: retention is defined
  lineinfile:
    path: /etc/conf.d/prometheus
    regexp: "^prometheus_retention_time="
    line: "prometheus_retention_time={{ retention }}"
  notify: restart prometheus

- name: Configure prometheus
  copy:
    dest: /etc/prometheus/
    src: prometheus.yml
  notify: reload prometheus

- name: Enable prometheus service
  service:
    name: prometheus
    enabled: true
    state: started