---
# Тег install можно использовать для выборочного запуска
- name: Create group
  ansible.builtin.group:
    name: "{{ node_exporter_user }}"
    system: true
    state: present

- name: Create user
  ansible.builtin.user:
    name: "{{ node_exporter_user }}"
    group: "{{ node_exporter_group }}"
    system: true
    shell: /sbin/nologin

- name: Create installation directory
  ansible.builtin.file:
    path: "{{ node_exporter_install_dir }}"
    state: directory
    owner: "{{ node_exporter_user }}"
    group: "{{ node_exporter_group }}"
    mode: "0755"

- name: Check if node_exporter archive exists locally
  ansible.builtin.stat:
    path: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
  register: node_archive

- name: Download node_exporter archive if absent
  ansible.builtin.get_url:
    url: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_version }}/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
    dest: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
    mode: "0644"
  when: not node_archive.stat.exists
  changed_when: false

- name: Extract node_exporter binary
  ansible.builtin.unarchive:
    src: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
    dest: "{{ node_exporter_install_dir }}"
    remote_src: true
    extra_opts: [--strip-components=1]
    creates: "{{ node_exporter_install_dir }}/node_exporter"

- name: Remove archive after extraction
  ansible.builtin.file:
    path: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
    state: absent
  when: node_archive.stat.exists
  changed_when: false

- name: Set binary ownership and permissions
  ansible.builtin.file:
    path: "{{ node_exporter_install_dir }}/node_exporter"
    owner: "{{ node_exporter_user }}"
    group: "{{ node_exporter_group }}"
    mode: "0755"

- name: Create symlink to node_exporter in /usr/local/bin
  ansible.builtin.file:
    src: "{{ node_exporter_install_dir }}/node_exporter"
    dest: /usr/local/bin/node_exporter
    state: link

- name: Deploy systemd unit for node_exporter
  ansible.builtin.template:
    src: node_exporter.service.j2
    dest: "{{ node_exporter_systemd_unit_path }}"
  notify: Update Systemd and restart Node Exporter

- name: Enable and start node_exporter service
  ansible.builtin.systemd:
    name: node_exporter
    enabled: true
    state: started