node_exporter: Add OpenBSD support

roles/node_exporter/handlers/main.yml

@@ -1,5 +1,5 @@
 ---
 - name: Restart node_exporter
   ansible.builtin.service:
-    name: prometheus-node-exporter
+    name: "{{ node_exporter_package }}"
     state: restarted

roles/node_exporter/tasks/main.yml

@@ -1,12 +1,15 @@
 ---
+- name: Include OS-specific variables
+  ansible.builtin.include_vars: "{{ ansible_os_family }}.yml"
+
 - name: Install packages
   ansible.builtin.package:
-    name: golang-github-prometheus-node-exporter
+    name: "{{ node_exporter_package }}"
     state: installed
 
 - name: Allow prometheus user to read private key
   ansible.builtin.user:
-    name: prometheus
+    name: "{{ node_exporter_user }}"
     groups: hostkey
     append: true
   notify: Restart node_exporter
@@ -40,9 +43,19 @@
       --web.config=/etc/node_exporter/web-config.yml
       --collector.textfile.directory /var/lib/prometheus/node-exporter"
   notify: Restart node_exporter
+  when: ansible_os_family == "RedHat"
 
-- name: Enable node_exporter service
+- name: Enable service
   ansible.builtin.service:
-    name: prometheus-node-exporter
+    name: "{{ node_exporter_service }}"
     state: started
     enabled: true
+    arguments: --web.config.file=/etc/node_exporter/web-config.yml
+  when: ansible_os_family == "OpenBSD"
+
+- name: Enable service
+  ansible.builtin.service:
+    name: "{{ node_exporter_service }}"
+    state: started
+    enabled: true
+  when: ansible_os_family == "RedHat"