ansible-ffibk/roles/service-prometheus/tasks/node-exporter.yml

# Install Prometheus node-exporter.
#
# @see http://prometheus.io/docs/introduction/getting_started/

- name: set internal variables for convenience
  set_fact:
    node_exporter_present: yes
    node_exporter_daemon_dir: "{{ prometheus_install_path }}/node_exporter-{{ node_exporter_version }}.linux-amd64"
    node_exporter_tarball_url: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_version }}/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"

- name: download and untar node_exporter tarball
  unarchive:
    src: "{{ node_exporter_tarball_url }}"
    dest: "{{ prometheus_install_path }}"
    copy: no
    creates: "{{ node_exporter_daemon_dir }}"

- name: create node_exporter /usr/local/bin link
  file:
    src: "{{ node_exporter_daemon_dir }}/node_exporter"
    dest: "/usr/local/bin/node_exporter"
    state: link

- name: mkdir for data
  file:
    path: "{{ prometheus_db_path }}"
    state: directory
    owner: "{{ prometheus_user }}"
    group: "{{ prometheus_group }}"
    mode: "u=rwx,g=rx,o="

- name: copy vhost node_exporter.conf
  template:
    src: "../templates/node_exporter_vhost.conf.j2"
    dest: "/etc/nginx/conf.d/node_exporter.conf"
  notify:
    - restart nginx

- name: copy systemd config to server
  template:
    src: "../templates/node_exporter.service.j2"
    dest: "/lib/systemd/system/node_exporter.service"
  notify:
    - reload systemd
    - restart node_exporter

- name: enable node_exporter service
  service:
    name: node_exporter
    enabled: yes
    state: started