++flows in a cdn

cdn-flow-traffic.dot

@@ -1,20 +1,33 @@
 digraph G {
     node [ shape=box ]
-    rankdir=LR;
+#    rankdir=BT;
 
-    label="CDN Traffic flow"
+    label="CDN flows"
+
+    subgraph cluster_user {
+        label="Outside / in the Internet"
+        user [ label="User\n(internal/customer)" ]
+        client [ label="Web site User\n" ]
+    }
+
+    subgraph cluster_origin {
+        label="Origin DC"
+        origin [ label="Origin Node\nServing example.com" ]
+    }
+    client->origin [ label="non-CDN access" style=dashed ]
 
     subgraph cluster_homedc {
         label="HomeDC"
 
-
         kubemaster [ label="Kubernetes master nodes" ]
         kubeworker [ label="Kubernetes worker nodes" ]
 
         subgraph cluster_kubernetes {
             label="Kubernetes Workload"
 
-            api [ label="APIs" ]
+            api [ label="Tenant/OpsAPI" ]
+            ui [ label="User Interface\nPost MVP" ]
+            db [ label="Database" ]
         }
     }
     kubemaster->kubeworker [ label="Controls" ]
@@ -25,7 +38,19 @@ digraph G {
 
         servicenode [ label="Service Node" ]
         edgenode [ label="Edge nodes" ]
+        delivery [ label="Delivery API" ]
+    }
+    delivery->servicenode [ label="Runs on" ]
 
-     }
+    user->ui [ label="A1. Create configuration" ]
+    user->api [ label="A1. Create configuration" style=dashed ]
+    ui->api [ label="A2. Create configuration" ]
+    api->db [ label="A3. Store data" ]
+    kubeworker->delivery [ label="A4. Trigger update" ]
+    delivery->edgenode [ label="A5. Reconfigure" ]
+
+    client->edgenode [ label="B1. Request data for example.com" ]
+    edgenode->origin [ label="B2. Request data\n(If not cached)" ]
+    edgenode->client [ label="B3. Return data for example.com" weight=0.2 ]
 
 }