---
- include: preflight.yml

- name: Create the MySQL Exporter group
  group:
    name: "{{ __mysqld_exporter_group }}"
    state: present
    system: true

- name: Create the MySQL Exporter user
  user:
    name: "{{ __mysqld_exporter_user }}"
    groups: "{{ __mysqld_exporter_group }}"
    append: true
    shell: /usr/sbin/nologin
    system: true
    createhome: false
    home: /

- name: Download mysqld_exporter binary to local folder
  become: false
  get_url:
    url: "https://github.com/prometheus/mysqld_exporter/releases/download/v{{ mysqld_exporter_version }}/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch_map[ansible_architecture] | default(ansible_architecture) }}.tar.gz"
    dest: "/tmp/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch_map[ansible_architecture] | default(ansible_architecture) }}.tar.gz"
    checksum: "sha256:{{ __mysqld_exporter_checksum }}"
  register: _download_binary
  until: _download_binary is succeeded
  retries: 5
  delay: 2
  delegate_to: localhost
  check_mode: false

- name: Unpack mysqld_exporter binary
  become: false
  unarchive:
    src: "/tmp/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch_map[ansible_architecture] | default(ansible_architecture) }}.tar.gz"
    dest: "/tmp"
    creates: "/tmp/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch_map[ansible_architecture] | default(ansible_architecture) }}/mysqld_exporter"
  delegate_to: localhost
  check_mode: false

- name: Propagate mysqld_exporter binaries
  copy:
    src: "/tmp/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch_map[ansible_architecture] | default(ansible_architecture) }}/mysqld_exporter"
    dest: "/usr/local/bin/mysqld_exporter"
    mode: 0755
    owner: root
    group: root
  notify:
    - restart mysqld exporter

  when: not ansible_check_mode
- name: Copy the mysqld_exporter systemd service file
  template:
    src: mysqld_exporter.service.j2
    dest: /etc/systemd/system/mysqld_exporter.service
    owner: root
    group: root
    mode: 0644
  no_log: true
  notify:
    - restart mysqld exporter

- name: Ensure mysqld_exporter is enabled on boot
  systemd:
    daemon_reload: true
    name: mysqld_exporter
    enabled: true