diff --git a/inventory/group_vars/all b/inventory/group_vars/all
index 4cbe3a7..9deda77 100644
--- a/inventory/group_vars/all
+++ b/inventory/group_vars/all
@@ -17,7 +17,7 @@ bgp_groups:
 prometheus_groups:
   - ffmwu-gateways
 
-prometheus_conf_main: prometheus/prometheus.yml.j2
+node_exporter_opts: "--web.listen-address=localhost:9100 --collector.systemd"
 
 http_domain_internal: ffmwu.org
 http_domain_external: freifunk-mwu.de
diff --git a/inventory/group_vars/ffmwu-monitoring b/inventory/group_vars/ffmwu-monitoring
index 54106b6..85bafb5 100644
--- a/inventory/group_vars/ffmwu-monitoring
+++ b/inventory/group_vars/ffmwu-monitoring
@@ -7,6 +7,9 @@ common_repos:
     repo_url: https://github.com/freifunk-mwu/backend-scripts.git
     version: ansible
 
+prometheus_conf_main: prometheus/prometheus.yml.j2
+prometheus_opts: "--web.listen-address=localhost:9090"
+
 prometheus_components:
   - prometheus
   - alertmanager