refactor(contrib/rackspace): create private network on Rackspace

Previously, we were creating servers using the default Rackspace
ServiceNet as the private network. This means that they are feasibly
accessible by other servers on that network. This commit ensures
we are creating a new, private network for deis and not connecting
to the ServiceNet any longer.

closes #891

Author: carmstrong

contrib/rackspace/provision-rackspace-cluster.sh

@@ -26,13 +26,20 @@ if ! which supernova > /dev/null; then
   exit 1
 fi
 
+if ! supernova production network-list|grep -q deis &>/dev/null; then
+  echo_yellow "Creating deis private network..."
+  supernova production network-create deis 10.21.12.0/24
+fi
+
+NETWORK_ID=`supernova production network-list|grep deis|awk -F"|" '{print $2}'|sed 's/^ *//g'`
+
 if [ -z "$DEIS_NUM_INSTANCES" ]; then
     DEIS_NUM_INSTANCES=3
 fi
 
 i=1 ; while [[ $i -le $DEIS_NUM_INSTANCES ]] ; do \
     echo_yellow "Provisioning deis-$i..."
-    supernova production boot --image c431c19c-4c09-48ef-a7c1-f4a43f65a1de --flavor $FLAVOR --key-name $1 --user-data ../coreos/user-data --config-drive true deis-$i ; \
+    supernova production boot --image c431c19c-4c09-48ef-a7c1-f4a43f65a1de --flavor $FLAVOR --key-name $1 --user-data ../coreos/user-data --no-service-net --nic net-id=$NETWORK_ID --config-drive true deis-$i ; \
     ((i = i + 1)) ; \
 done