bundles/telegraf: ensure telegraf is running, restart on config changes

bundles/telegraf/items.py

@@ -69,5 +69,17 @@ files = {
         'context': {
             'config': telegraf_config,
         },
+        'triggers': {
+            'svc_systemd:telegraf:restart',
+        },
+    },
+}
+
+svc_systemd = {
+    'telegraf': {
+        'needs': {
+            'file:/etc/telegraf/telegraf.conf',
+            'pkg_apt:telegraf',
+        },
     },
 }