Diffs showing how complex (i.e. easy) it's to add a another cluster to the topology managed by rulens

onedc_to_twodc_upgrade.diff

diff -u examples/onedc/topology.yaml examples/twodc/topology.yaml
--- examples/onedc/topology.yaml        2013-09-19 15:17:42.546613699 +0300
+++ examples/twodc/topology.yaml        2013-09-19 14:49:10.519955115 +0300
@@ -81,6 +81,20 @@
         # If worker p isi not in the list above, choose random balancer for it
         default: random
 
+  cluster2:
+    layout: cluster
+    rule:
+      dc: second
+    children:
+      frontend:
+      - ip: 127.2.5.1
+      balancer:
+      - ip: 127.2.11.1
+      gateway_input:
+      - ip: 127.2.6.1
+      gateway_output:
+      - ip: 127.2.6.1
+
   subcluster1:
     # matches all nodes in the topology
     match_topology: internal
@@ -102,6 +116,7 @@
     layout: world
     children:
     - cluster1
+    - cluster2
 
   #  This is a pseudo topology that "extracts" the ports from the other
   #  topology. So that when client requests "public" topology, it always gets
diff -u examples/onedc/addresses.txt examples/twodc/addresses.txt
--- examples/onedc/addresses.txt        2013-09-19 15:18:41.276613446 +0300
+++ examples/twodc/addresses.txt        2013-09-19 14:50:24.269954765 +0300
@@ -23,3 +23,15 @@
 topology://internal?ip=127.1.22.6&dc=first&role=worker&hostname=willy&pid=2260 NN_REP
 topology://internal?ip=127.1.22.7&dc=first&role=worker&hostname=woody&pid=2270 NN_REP
 topology://internal?ip=127.1.22.7&dc=first&role=worker&hostname=woody&pid=2271 NN_REP
+##### DC 2 #####
+# Frontends
+topology://internal?ip=127.2.5.1&dc=second&role=frontend&hostname=faith&pid=510&id=1 device
+topology://internal?ip=127.2.5.1&dc=second&role=frontend&hostname=faith&pid=511&id=2 device
+# Gateway
+topology://internal?ip=127.2.6.1&dc=second&role=gateway_input&hostname=gloria&pid=610 device
+topology://internal?ip=127.2.6.1&dc=second&role=gateway_output&hostname=gloria&pid=610 device
+# Load Balancers
+topology://internal?ip=127.2.11.1&dc=second&role=balancer&hostname=lora&pid=1110 device
+# Workers
+topology://internal?ip=127.2.22.1&dc=second&role=worker&hostname=winnie&pid=2210 NN_REP
+topology://internal?ip=127.2.22.2&dc=second&role=worker&hostname=winston&pid=2220 NN_REP

twodc_to_threedc_upgrade.diff

diff -u examples/twodc/topology.yaml examples/threedc/topology.yaml
--- examples/twodc/topology.yaml	2013-09-19 14:49:10.519955115 +0300
+++ examples/threedc/topology.yaml	2013-09-19 14:51:55.679954297 +0300
@@ -94,6 +94,19 @@
       - ip: 127.2.6.1
       gateway_output:
       - ip: 127.2.6.1
+  cluster3:
+    layout: cluster
+    rule:
+      dc: third
+    children:
+      frontend:
+      - ip: 127.3.5.1
+      balancer:
+      - ip: 127.3.11.1
+      gateway_input:
+      - ip: 127.3.6.1
+      gateway_output:
+      - ip: 127.3.6.1
 
   subcluster1:
     # matches all nodes in the topology
@@ -117,6 +130,7 @@
     children:
     - cluster1
     - cluster2
+    - cluster3
 
   #  This is a pseudo topology that "extracts" the ports from the other
   #  topology. So that when client requests "public" topology, it always gets
diff -u examples/twodc/addresses.txt examples/threedc/addresses.txt
--- examples/twodc/addresses.txt	2013-09-19 14:50:24.269954765 +0300
+++ examples/threedc/addresses.txt	2013-09-19 14:50:03.846621529 +0300
@@ -35,3 +35,15 @@
 # Workers
 topology://internal?ip=127.2.22.1&dc=second&role=worker&hostname=winnie&pid=2210 NN_REP
 topology://internal?ip=127.2.22.2&dc=second&role=worker&hostname=winston&pid=2220 NN_REP
+##### DC 3 #####
+# Frontends
+topology://internal?ip=127.3.5.1&dc=third&role=frontend&hostname=francie&pid=510&id=1 device
+topology://internal?ip=127.3.5.1&dc=third&role=frontend&hostname=francie&pid=511&id=2 device
+# Gateway
+topology://internal?ip=127.3.6.1&dc=third&role=gateway_input&hostname=glenda&pid=610 device
+topology://internal?ip=127.3.6.1&dc=third&role=gateway_output&hostname=glenda&pid=610 device
+# Load Balancers
+topology://internal?ip=127.3.11.1&dc=third&role=balancer&hostname=linda&pid=1110 device
+# Workers
+topology://internal?ip=127.3.22.1&dc=third&role=worker&hostname=walter&pid=2210 NN_REP
+topology://internal?ip=127.3.22.2&dc=third&role=worker&hostname=wilber&pid=2220 NN_REP