Enbled docker swarm metrics only on swarm docker nodes

Change-Id: Iec124f23e08cbefc5b8b27d4e1493c44135fcea7
Related-PROD: PROD-23737
diff --git a/docker/swarm/manager.yml b/docker/swarm/manager.yml
index 3b2d916..a1eb8b7 100644
--- a/docker/swarm/manager.yml
+++ b/docker/swarm/manager.yml
@@ -15,3 +15,8 @@
       options:
         log-opts:
           labels: "com.docker.stack.namespace,com.docker.swarm.service.name,com.docker.swarm.task.name"
+  telegraf:
+    agent:
+      input:
+        docker:
+          gather_services: true