---
- name: Download Node Exporter binary
  get_url:
    url: https://github.com/prometheus/node_exporter/releases/download/v1.6.0/node_exporter-1.6.0.linux-amd64.tar.gz
    dest: /tmp/node_exporter.tar.gz
    mode: '0644'

- name: Extract Node Exporter
  unarchive:
    src: /tmp/node_exporter.tar.gz
    dest: /opt
    remote_src: yes
    creates: /opt/node_exporter-1.6.0.linux-amd64

- name: Link Node Exporter
  file:
    src: /opt/node_exporter-1.6.0.linux-amd64
    dest: /opt/node_exporter
    state: link

- name: Create node_exporter user
  user:
    name: node_exporter
    system: yes
    shell: /bin/false

- name: Create directories
  file:
    path: /var/lib/node_exporter
    state: directory
    owner: node_exporter
    group: node_exporter
    mode: '0755'

- name: Copy Node Exporter service
  template:
    src: node_exporter.service.j2
    dest: /etc/systemd/system/node_exporter.service
    owner: root
    group: root
    mode: '0644'

- name: Enable and start Node Exporter
  systemd:
    name: node_exporter
    daemon_reload: yes
    enabled: yes
    state: started

- name: Register Node-exporter to Consul
  uri:
    url: "http://{{ consul_server }}:8500/v1/agent/service/register"
    method: PUT
    body_format: json
    body:
      name: "node-exporter-{{ inventory_hostname }}"
      id: "node-exporter-{{ inventory_hostname }}"
      address: "{{ inventory_hostname }}"
      port: 9100
      tags: ["node-exporter", "{{ inventory_hostname }}"]
      check:
        http: "http://{{ inventory_hostname }}:9100/metrics"
        interval: "10s"
    headers:
      Content-Type: application/json
  delegate_to: "{{ consul_server }}"