---
- name: Install prometheus package
  package:
    name: prometheus
    state: present
  tags:
    - role::prometheus

- name: Create directories for Prometheus versions and tarballs
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    owner: root
    group: prometheus
    mode: "0750"
  tags:
    - role::prometheus
  loop:
    - "{{ prometheus_base_directory }}"
    - "{{ prometheus_installation_directory }}"
    - "{{ prometheus_base_release_dest }}"

- name: Download Prometheus from GitHub
  ansible.builtin.get_url:
    url: "{{ prometheus_release_url }}"
    checksum: sha256:{{ prometheus_release_sha256sum_url }}
    dest: "{{ prometheus_release_tarball_dest }}"
    owner: prometheus
    group: prometheus
    mode: "0400"
  tags:
    - role::prometheus

- name: Uncompress Prometheus archive
  ansible.builtin.unarchive:
    src: "{{ prometheus_release_tarball_dest }}"
    dest: "{{ prometheus_installation_directory }}"
    owner: prometheus
    group: prometheus
    remote_src: true
  tags:
    - role::prometheus

- name: Configure prometheus command line options
  lineinfile:
    path: /etc/default/prometheus
    regexp: ^ARGS.*
    line: ARGS="{{ prometheus_cmdline_options }}"
  tags:
    - role::prometheus
  when:
    - prometheus_cmdline_options is defined
  notify:
    - Restart the prometheus service

- name: Deploy prometheus general config
  copy:
    content: |
      # Ansible managed
      {{ prometheus_configuration }}
    dest: /etc/prometheus/prometheus.yml
    owner: prometheus
    group: prometheus
    mode: "0400"
  tags:
    - role::prometheus
  notify:
    - Reload the prometheus service

- name: Configure prometheus rules
  copy:
    content: |
      # Ansible managed
      {{ prometheus_rules }}
    dest: /etc/prometheus/rules.yml
    owner: prometheus
    group: prometheus
    mode: "0400"
  tags:
    - role::prometheus
  notify:
    - Reload the prometheus service

- name: Create service override directory
  ansible.builtin.file:
    path: /etc/systemd/system/prometheus.service.d
    state: directory
    owner: root
    group: root
    mode: "0755"
  tags:
    - role::prometheus

- name: Create service dropin
  ansible.builtin.copy:
    content: |
      # Ansible managed
      [Service]
      ExecStart =
      ExecStart = {{ prometheus_installation_directory }}/{{ prometheus_release_name }}/prometheus $ARGS
    dest: /etc/systemd/system/prometheus.service.d/override.conf
    owner: root
    group: root
    mode: "0444"
  tags:
    - role::prometheus
  notify:
    - Reload the systemd daemon
    - Restart the prometheus service