prometheus_node: collect textfiles

roles/prometheus_node/handlers/main.yml

@@ -0,0 +1,10 @@
+---
+- name: Run daemon-reload
+  systemd:
+    daemon_reload: true
+
+- name: Restart prometheus-node-exporter
+  systemd:
+    name: prometheus-node-exporter.service
+    state: restarted
+...

roles/prometheus_node/tasks/main.yml

@@ -6,12 +6,41 @@
       - prometheus-node-exporter-collectors
     install_recommends: false  # Do not install smartmontools
 
+- name: Configure prometheus-node-exporter
+  template:
+    src: default.j2
+    dest: /etc/default/prometheus-node-exporter
+    owner: root
+    group: root
+    mode: u=rw,g=r,o=r
+  notify:
+    - Restart prometheus-node-exporter
+
 - name: Install smartmontools
   apt:
     name: smartmontools
   when:
     - "ansible_virtualization_role == 'host'"
 
+- name: Create override directory
+  file:
+    path: /etc/systemd/system/prometheus-node-exporter.service.d
+    state: directory
+    owner: root
+    group: root
+    mode: u=rwx,g=rw,o=rw
+
+- name: Override prometheus-node-exporter.service
+  template:
+    src: override.conf.j2
+    dest: /etc/systemd/system/prometheus-node-exporter.service.d/override.conf
+    owner: root
+    group: root
+    mode: u=rw,g=r,o=r
+  notify:
+    - Run daemon-reload
+    - Restart prometheus-node-exporter
+
 - name: Enable prometheus-node-exporter
   systemd:
     name: prometheus-node-exporter

roles/prometheus_node/templates/default.j2

@@ -0,0 +1,7 @@
+{{ ansible_managed | comment }}
+
+{% if prometheus_node__text_dir is defined %}
+ARGS="--collector.textfile.directory={{ prometheus_node__text_dir | quote }}"
+{% else %}
+ARGS=""
+{% endif %}

roles/prometheus_node/templates/override.conf.j2

@@ -0,0 +1,4 @@
+{{ ansible_managed | comment }}
+
+[Service]
+RuntimeDirectory=prometheus-node-exporter