---
# Ship host/container logs → Loki and metrics → Prometheus via Grafana Alloy
# (Promtail successor; also collects node + cAdvisor metrics).

- name: alloy | ensure project directories
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    owner: "{{ admin_user }}"
    group: "{{ admin_user }}"
    mode: "0750"
  loop:
    - "{{ apps_base_dir }}/observability"
    - "{{ alloy_dir }}"

- name: alloy | config
  ansible.builtin.template:
    src: config.alloy.j2
    dest: "{{ alloy_dir }}/config.alloy"
    owner: "{{ admin_user }}"
    group: "{{ admin_user }}"
    mode: "0644"
  register: _alloy_config

- name: alloy | compose file
  ansible.builtin.template:
    src: docker-compose.yml.j2
    dest: "{{ alloy_dir }}/docker-compose.yml"
    owner: "{{ admin_user }}"
    group: "{{ admin_user }}"
    mode: "0644"
  register: _alloy_compose

- name: alloy | start / recreate container
  ansible.builtin.command:
    cmd: >-
      docker compose up -d --remove-orphans
      {{ '--force-recreate' if (_alloy_compose is changed or _alloy_config is changed) else '' }}
    chdir: "{{ alloy_dir }}"
  become: true
  become_user: "{{ admin_user }}"
  register: _alloy_up
  changed_when: >-
    _alloy_up.rc == 0 and (
      'Started' in (_alloy_up.stdout | default(''))
      or 'Recreated' in (_alloy_up.stdout | default(''))
      or 'Created' in (_alloy_up.stdout | default(''))
      or _alloy_compose is changed
      or _alloy_config is changed
    )