ansible-loki-role/tasks/preflight.yml

---
- name: Assert usage of systemd as an init system
  ansible.builtin.assert:
    that: ansible_service_mgr == 'systemd'
    msg: "This module only works with systemd"

- name: Get version
  when:
    - loki_version == "latest"
    - loki_binary_local_dir | length == 0
  block:
    - name: Get latest release
      ansible.builtin.uri:
        url: "https://api.github.com/repos/grafana/loki/releases/latest"
        method: GET
        return_content: true
        status_code: 200
        body_format: json
        validate_certs: false
        user: "{{ lookup('env', 'GH_USER') | default(omit) }}"
        password: "{{ lookup('env', 'GH_TOKEN') | default(omit) }}"
      no_log: "{{ not lookup('env', 'ANSIBLE_DEBUG') | bool }}"
      register: _latest_release
      until: _latest_release.status == 200
      retries: 5

    - name: Set loki version to {{ _latest_release.json.tag_name[1:] }}
      ansible.builtin.set_fact:
        loki_version: "{{ _latest_release.json.tag_name[1:] }}"

- name: Install deps
  ansible.builtin.apt:
    name:
      - unzip
      - python3-dnspython
      - python3-docker
    update_cache: true