T7528: only stop service if previously deployed

Author: nvollmar

src/conf_mode/service_monitoring_prometheus.py

@@ -115,16 +115,19 @@ def generate(monitoring):
         # Delete systemd files
         if os.path.isfile(node_exporter_service_file):
             os.unlink(node_exporter_service_file)
+            monitoring.update({'node_exporter_stop_required': {}})
 
     if not monitoring or 'frr_exporter' not in monitoring:
         # Delete systemd files
         if os.path.isfile(frr_exporter_service_file):
             os.unlink(frr_exporter_service_file)
+            monitoring.update({'frr_exporter_stop_required': {}})
 
     if not monitoring or 'blackbox_exporter' not in monitoring:
         # Delete systemd files
         if os.path.isfile(blackbox_exporter_service_file):
             os.unlink(blackbox_exporter_service_file)
+            monitoring.update({'blackbox_exporter_stop_required': {}})
 
     if not monitoring:
         return None
@@ -173,11 +176,14 @@ def apply(monitoring):
     # Reload systemd manager configuration
     call('systemctl daemon-reload')
     if not monitoring or 'node_exporter' not in monitoring:
-        call(f'systemctl stop {node_exporter_systemd_service}')
+        if 'node_exporter_stop_required' in monitoring:
+            call(f'systemctl stop {node_exporter_systemd_service}')
     if not monitoring or 'frr_exporter' not in monitoring:
-        call(f'systemctl stop {frr_exporter_systemd_service}')
+        if 'frr_exporter_stop_required' in monitoring:
+            call(f'systemctl stop {frr_exporter_systemd_service}')
     if not monitoring or 'blackbox_exporter' not in monitoring:
-        call(f'systemctl stop {blackbox_exporter_systemd_service}')
+        if 'blackbox_exporter_stop_required' in monitoring:
+            call(f'systemctl stop {blackbox_exporter_systemd_service}')
 
     if not monitoring:
         return