Install prometheus node_exporter - Linux ARM 32 bits - Including on Raspberry PI 3B & 4B

main.yaml

---
# tasks file for roles/node-exporter
- name: check if node exporter exist
  stat:
    path: "{{ node_exporter_bin }}"
  register: __check_node_exporter_present

- name: if node exporter exist get version
  shell: "cat /etc/systemd/system/node_exporter.service | grep Version | sed s/'.*Version '//g"
  register: __get_node_exporter_version
  when: __check_node_exporter_present.stat.exists == true
  changed_when: false

- name: create node exporter user
  user:
    name: "{{ node_exporter_user }}"
    append: true
    shell: /usr/sbin/nologin
    system: true
    create_home: false
    home: /

- name: create node exporter config dir
  file:
    path: "{{ node_exporter_dir_conf }}"
    state: directory
    owner: "{{ node_exporter_user }}"
    group: "{{ node_exporter_group }}"

- name: download and unzip node exporter if not exist
  unarchive:
    src: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_version }}/node_exporter-{{ node_exporter_version }}.linux-armv7.tar.gz"
    dest: /tmp/
    remote_src: yes
    validate_certs: false
  when: __check_node_exporter_present.stat.exists == false or not __get_node_exporter_version.stdout == node_exporter_version

- name: move the binary to the final destination
  copy:
    src: "/tmp/node_exporter-{{ node_exporter_version }}.linux-armv7/node_exporter"
    dest: "{{ node_exporter_bin }}"
    owner: "{{ node_exporter_user }}"
    group: "{{ node_exporter_group }}"
    mode: 0755
    remote_src: yes
  when: __check_node_exporter_present.stat.exists == false or not __get_node_exporter_version.stdout == node_exporter_version

- name: clean
  file:
    path: /tmp/node_exporter-{{ node_exporter_version }}.linux-armv7/
    state: absent

- name: install service
  template:
    src: node_exporter.service.j2
    dest: /etc/systemd/system/node_exporter.service
    owner: root
    group: root
    mode: 0755
  notify: reload_daemon_and_restart_node_exporter

- meta: flush_handlers

- name: service always started
  systemd:
    name: node_exporter
    state: started
    enabled: yes