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

---

- name: enable prometheus admin api
  ansible.builtin.lineinfile:
    path: /etc/default/prometheus
    regexp: "^ARGS=.*$"
    line: >-
      ARGS="--query.lookback-delta={{ prometheus_lookback_delta }} --web.enable-admin-api --web.listen-address=127.0.0.1:9090"
    insertbefore: BOF
  notify: restart prometheus

- name: flush handlers
  ansible.builtin.meta: flush_handlers

- name: wait
  ansible.builtin.pause:
    seconds: 15

- name: clear prometheus time series database
  ansible.builtin.uri:
    url: http://127.0.0.1:9090/api/v1/admin/tsdb/delete_series?match[]=%7B__name__%3D~%22.%2B%22%7D
    method: POST
    status_code:
      - 200
      - 204

- name: wait
  ansible.builtin.pause:
    seconds: 5

- name: disable prometheus admin api
  ansible.builtin.lineinfile:
    path: /etc/default/prometheus
    regexp: "^ARGS=.*$"
    line: >-
      ARGS="--query.lookback-delta={{ prometheus_lookback_delta }}"
    insertbefore: BOF
  notify: restart prometheus

- name: flush handlers
  ansible.builtin.meta: flush_handlers