initial ansible code

roles/systemd_exporter/defaults/main.yml

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+---
+systemd_exporter_include: '^rclone.*\.service'

roles/systemd_exporter/handlers/main.yml

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+---
+- name: restart systemd_exporter
+  systemd:
+    daemon_reload: true
+    enabled: true
+    name: systemd_exporter
+    state: restarted

roles/systemd_exporter/tasks/main.yml

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+---
+
+- name: Get latest systemd_exporter version
+  github_release:
+    user: povilasv
+    repo: systemd_exporter
+    action: latest_release
+    token: "{{ vault_github_token }}"
+  delegate_to: localhost
+  run_once: true
+  register: systemd_exporter_version
+- name: "{{ systemd_exporter_version }}"
+  set_fact:
+    systemd_exporter_version: "{{ systemd_exporter_version | replace ('v', '', 1) | trim }}"
+  run_once: true
+
+- name: download systemd_exporter {{ systemd_exporter_version.tag }} from GitHub
+  get_url:
+    url: "https://github.com/povilasv/systemd_exporter/releases/download/\
+          v{{ systemd_exporter_version.tag }}/systemd_exporter-{{ systemd_exporter_version.tag }}\
+          .linux-{{ deb_architecture }}.tar.gz"
+    dest: "/tmp/systemd_exporter-{{ systemd_exporter_version.tag }}-linux-{{ deb_architecture }}.tar.gz"
+  register: _download_archive
+  until: _download_archive is succeeded
+  retries: 3
+  delay: 5
+
+- name: unpack systemd_exporter binaries
+  unarchive:
+    src: "/tmp/systemd_exporter-{{ systemd_exporter_version.tag }}-linux-{{ deb_architecture }}.tar.gz"
+    dest: "/tmp"
+    creates: "/tmp/systemd_exporter-{{ systemd_exporter_version.tag }}.linux-{{ deb_architecture }}"
+    remote_src: true
+
+- name: Copy systemd_exporter
+  copy:
+    src: "/tmp/systemd_exporter-{{ systemd_exporter_version.tag }}.linux-{{ deb_architecture }}/systemd_exporter"
+    dest: "{{ systemd_exporter_install_dir }}/systemd_exporter"
+    remote_src: true
+    owner: "{{ systemd_exporter_system_user }}"
+    group: "{{ systemd_exporter_system_group }}"
+    mode: 0755
+  notify: restart systemd_exporter
+
+- name: Copy the systemd_exporter systemd service file
+  template:
+    src: systemd_exporter.service.j2
+    dest: /etc/systemd/system/systemd_exporter.service
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart systemd_exporter

roles/systemd_exporter/templates/systemd_exporter.service.j2

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+## Managed by Ansible ##
+
+[Unit]
+Description=Prometheus Systemd Exporter
+After=network-online.target
+
+[Service]
+Type=simple
+User={{ systemd_exporter_system_user }}
+Group={{ systemd_exporter_system_group }}
+ExecStart={{ systemd_exporter_install_dir }}/systemd_exporter --systemd.collector.unit-include="{{ systemd_exporter_include }}"
+Restart=always
+RestartSec=1
+
+[Install]
+WantedBy=multi-user.target

roles/systemd_exporter/vars/main.yml

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+---
+# Variables
+systemd_exporter_install_dir: "/usr/local/bin"
+systemd_exporter_system_group: "node-exporter"
+systemd_exporter_system_user: "{{ systemd_exporter_system_group }}"