Add diagrams test

catch-all/07_diagrams_as_code/02_cluster_web.py

@@ -0,0 +1,28 @@
+#! /usr/bin/env python
+
+from diagrams import Cluster, Diagram
+from diagrams.aws.compute import ECS
+from diagrams.aws.database import ElastiCache, RDS
+from diagrams.aws.network import ELB
+from diagrams.aws.network import Route53
+
+with Diagram("Clustered Web Services", show=False):
+    dns = Route53("dns")
+    lb = ELB("lb")
+
+    with Cluster("Services"):
+        svc_group = [
+            ECS("web1"),
+            ECS("web2"),
+            ECS("web3")
+        ]
+
+    with Cluster("DB Cluster"):
+        db_primary = RDS("userdb")
+        db_primary - [RDS("userdb ro")]
+
+    memcached = ElastiCache("memcached")
+
+    dns >> lb >> svc_group
+    svc_group >> db_primary
+    svc_group >> memcached