Add prometheus-node-exporter role and add it to most hosts

playbooks/roles/prometheus_node_exporter/tasks/main.yaml

@@ -0,0 +1,14 @@
+- name: make sure the `prometheus-node-exporter` package is installed
+  ansible.builtin.apt:
+    name: prometheus-node-exporter
+    state: present
+    allow_change_held_packages: true
+    update_cache: true
+  become: true
+
+- name: make sure `prometheus-node-exporter.service` is started and ansibled
+  ansible.builtin.systemd:
+    name: prometheus-node-exporter.service
+    state: started
+    enabled: true
+  become: true