node_exporter.yml

---
  - name: fix node_exporter user
    become: true
    user:
      name: prometheus
      state: present

  - name: download node_exporter
    become: true
    unarchive:
      src: 'https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz'
      dest: /opt/
      owner: prometheus
      group: prometheus
      mode: 0755
      remote_src: yes

  - name: create a link for node_exporter
    become: true
    file:
      src: '/opt/node_exporter-0.18.1.linux-amd64'
      dest: /opt/node_exporter
      state: link

  - name: copy systemd templates
    become: true
    copy:
      src:  node_exporter/node_exporter.service
      dest: /etc/systemd/system/node_exporter.service
      force: yes
      owner: root
      group: root
      mode: 0644

  - name: exec systemd
    become: true
    systemd:
      name: node_exporter
      state: restarted
      daemon_reload: yes
      enabled: true

  - name: check hw
    shell: if [ "$(ps axu | grep node_exporter | grep -v grep)" != "" ]; then echo "true"; else echo "false"; fi
    register: check

  - name: failed if not work
    fail:
    when: check.stdout == "false"