add cloud info

CloudComputing_Lab/modules/ROOT/pages/f.adoc

@@ -2,6 +2,21 @@
 =  Swarm
 
 
+Docker Swarm is a *clustering* and *scheduling* tool for Docker containers. With Swarm, IT administrators and developers can establish and manage a cluster of Docker nodes as a single virtual system.
+
+Clustering is an important feature for container technology, because it creates a cooperative group of systems that can provide redundancy, enabling Docker Swarm failover if one or more nodes experience an outage.
+
+Features:
+
+- Decentralized design
+- Scaling 
+- Desired state reconciliation
+- Multi-host networking
+- Service discovery
+- Load balancing
+- Secure by default
+- Rolling updates
+
 == Create
 
 http://docs.swarmlab.io/SwarmLab-HowTos/labs/cloud/Creaate-Swarm.adoc.html#_create_swarm[Create a swarm^]