Added a bit of networking documentation

README.md

@@ -14,6 +14,9 @@ Each of the cookbooks in the cookbooks directory is actually a [git submodule](h
 
 There are a number of different chef roles that are included with these cookbooks.  Descriptions of each of the roles can be found in the [readme](https://github.com/rcbops/chef-cookbooks/blob/master/roles/README.md) in the roles directory.  
 
+## Network configuration ##
+Network configuration is stored in Chef `environment`. Please see `environments/example.json` and [networking documentation](networking.md).
+
 ## Usage ##
 
 ##### getting the cookbooks #####

networking.md

@@ -0,0 +1,24 @@
+The following section is incomplete but is a good start.
+
+* Services that will listen on IP from the network specified in `node['osops_networks']['networks']['nova']`
+	* `cinder-scheduler`
+	* `keystone`
+	* `nova-cert`
+	* `nova-consoleauth`
+	* `nova-novncproxy`
+	* `nova-scheduler`
+	* `ntpd`
+	* `ZeroMQ`
+* Services that will listen on IP from the network specified in `node['osops_networks']['networks']['public']`
+	* `apache2` (dashboard)
+	* `glance-api`
+	* `glance-registry`
+	* `nova-api`
+* Services that will listen on IP from the network specified in `node['osops_networks']['networks']['management']`
+	* TBD
+* `node['nova']['networks']['ipv4_cidr']` (with parallel `label` attribute `public`)
+	*Warning*: this goes into MySQL database `nova`, table `networks`. You have to update it manually in MySQL if you change the value later, the recipes do not do that.
+* `node['nova']['networks']['ipv4_cidr']` (with parallel `label` attribute `private`)
+	Warning: same as above.
+
+