diagram {
  User; API; Conductor; Storage; Boot; Network; Deploy;
  activation = none;
  span_height = 1;
  edge_length = 250;
  default_note_color = white;
  default_fontsize = 14;

  User -> API [label = "User or intermediate service such as nova supplies volume target configuration."];
  User -> API [label = "Sends deployment request."];
  API -> Conductor [label = "API transmits the action to the conductor service"];
  Conductor -> Storage [label = "Conductor calls the storage_interface to perform attachment of volume to node"];
  Conductor -> Boot [label = "Conductor calls the boot interface signaling preparation of an instance"];
  Conductor -> Network [label = "Conductor attaches the machine to network requested by the user VIF"];
  Conductor -> Deploy [label = "Conductor starts deployment steps which just turn the power on."];
}