Enbled docker swarm metrics only on swarm docker nodes

Change-Id: Iec124f23e08cbefc5b8b27d4e1493c44135fcea7
Related-PROD: PROD-23737
diff --git a/docker/swarm/worker.yml b/docker/swarm/worker.yml
index 4bed790..6958efb 100644
--- a/docker/swarm/worker.yml
+++ b/docker/swarm/worker.yml
@@ -11,3 +11,8 @@
       master:
         host: ${_param:cluster_node01_address}
         port: ${_param:docker_swarm_master_port}
+  telegraf:
+    agent:
+      input:
+        docker:
+          gather_services: true