ansible-collection-prometheus/roles/prometheus/tasks/blackbox.yml

---

- name: initialize list of blackbox modules
  set_fact:
    _blackbox_modules: {}

- name: build list of blackbox modules
  set_fact:
    _blackbox_modules: "{% set _ = _blackbox_modules.update(item) %}{{ _blackbox_modules }}"
  loop: "{{ hostvars[inventory_hostname] | dict2items | selectattr('key', 'match', '^prometheus_job_.+$') | map(attribute='value') | map(attribute='blackbox') | map(attribute='modules') | select('defined') | list }}"

- name: render blackbox exporter configuration
  template:
    src: blackbox.yml
    dest: /etc/prometheus/blackbox.yml
    owner: root
    group: root
    mode: 0644
  vars:
    blackbox_modules: "{{ _blackbox_modules }}"
  notify: restart blackbox exporter