ansible-lol/ansible/roles/prometheus/handlers/main.yml

## Restart Prometheus on changes
- name: restart prometheus
  ansible.builtin.service:
    name: '{{ prometheus_service }}'
    state: restarted

## Restart Alertmanger on changes
- name: restart alertmanager
  ansible.builtin.service:
    name: '{{ alertmanager_service }}'
    state: restarted