prometheus-exporter: set port on Windows and open firewall

README.md

@@ -1,9 +1,11 @@
 # Using the ansible scripts
 
 Ansible playbooks for deploying classroom computers. Run with something like:
+
     ansible-playbook --user <local admin> -k -K -i inventory.yml setup.py
 
 or, for Apple computers:
+
     ansible-playbook --user <local admin> -k -K -i inventory.yml macsetup.py
 
 # How classroom computers are prepared at FRI

roles/prometheus-exporter/tasks/main_win.yml

@@ -1,3 +1,13 @@
 - name: Install prometheus exporter
   win_chocolatey:
     name: prometheus-windows-exporter.install
+    package_params: "/ListenPort:9100"
+
+- name: Allow access to metrics
+  win_firewall_rule:
+    name: "Allow access to Prometheus metrics"
+    enabled: true
+    action: allow
+    direction: in
+    protocol: tcp
+    localport: 9100