{% set node_exporter_enabled = salt['pillar.get']('pmg:node_exporter:enabled', True) %}
{% set node_exporter_package = salt['pillar.get']('pmg:node_exporter:package', 'prometheus-node-exporter') %}
{% set node_exporter_service = salt['pillar.get']('pmg:node_exporter:service', 'prometheus-node-exporter') %}
{% set node_exporter_textfile_dir = salt['pillar.get']('pmg:node_exporter:textfile_directory', '/var/lib/prometheus/node-exporter') %}
{% set node_exporter_args = salt['pillar.get']('pmg:node_exporter:args', '--collector.textfile.directory=' ~ node_exporter_textfile_dir) %}

{% if node_exporter_enabled %}
pmg-node-exporter-package:
  pkg.installed:
    - name: {{ node_exporter_package }}

pmg-node-exporter-textfile-dir:
  file.directory:
    - name: {{ node_exporter_textfile_dir }}
    - user: root
    - group: root
    - mode: "0755"

pmg-node-exporter-defaults:
  file.managed:
    - name: /etc/default/prometheus-node-exporter
    - user: root
    - group: root
    - mode: "0644"
    - contents:
      - "# Managed by Salt."
      - "ARGS=\"{{ node_exporter_args }}\""

pmg-node-exporter-service:
  service.running:
    - name: {{ node_exporter_service }}
    - enable: true
    - require:
      - pkg: pmg-node-exporter-package
      - file: pmg-node-exporter-textfile-dir
      - file: pmg-node-exporter-defaults
    - watch:
      - file: pmg-node-exporter-defaults
{% endif %}