diagram.json

{
"nodes":
  [

  {"name":"Client 1","group":1},
  {"name":"Loadbalancer 1","group":2},
  {"name":"Webserver 1","group":3},
  {"name":"Webserver 2","group":3},
  {"name":"Database 1","group":4},
  {"name":"Database 2","group":4}
  ],
  "links":
  [
  {"source":0,"target":1,"value":1},
  {"source":1,"target":2,"value":1},
  {"source":1,"target":3,"value":1},
  {"source":2,"target":4,"value":1},
  {"source":3,"target":4,"value":1},
  {"source":4,"target";5,"value":1}
  ]
}