---
- name: Download postgres_exporter from GitHub
  get_url:
    dest: /tmp/prometheus_postgres_exporter.tar.gz
    url: https://github.com/wrouesnel/postgres_exporter/releases/download/v0.4.7/postgres_exporter_v0.4.7_linux-amd64.tar.gz
    checksum: sha256:c34d61bb4deba8efae06fd3c9979b96dae3f3c757698ce3384c80fff586c667b

- name: Create postgres_exporter directory
  file:
    path: /opt/prometheus_postgres_exporter
    state: directory
    owner: postgres
    group: postgres
    mode: 0755

- name: Extract postgres_exporter
  unarchive:
    remote_src: true
    src: /tmp/prometheus_postgres_exporter.tar.gz
    dest: /opt/prometheus_postgres_exporter
    owner: postgres
    group: postgres
    extra_opts:
      - --strip-components=1
    creates: /opt/prometheus_postgres_exporter/postgres_exporter

- name: Create queries.yaml file
  copy:
    src: queries.yaml
    dest: /opt/prometheus_postgres_exporter/queries.yaml
    owner: postgres
    group: postgres
    mode: 0644

- name: Create postgres_exporter service file
  copy:
    src: prometheus_postgres_exporter.service
    dest: /etc/systemd/system/prometheus_postgres_exporter.service
    owner: root
    group: root
    mode: 0644

- name: Start and enable postgres_exporter service
  service:
    name: prometheus_postgres_exporter
    state: started
    enabled: true