Use a variable for the public domain name

test/Vagrantfile

 
 API_VERSION = "2"
 
+# Need to match the values set in group_vars/all.
 DOMAIN = "minicluster-test.net"
+DOMAIN_PUBLIC = "public.minicluster-test.net"
 
 Vagrant.configure(API_VERSION) do |config|
 
@@ -21,14 +23,15 @@ Vagrant.configure(API_VERSION) do |config|
   # Hosts need to find each other using both the short name and the
   # fqdn. Furthermore, the OAuth workflow (even internally) uses the
   # public domain, so we also create an entry for that, pointing at a
-  # random node.
+  # random node (we assume that the public domain doesn't actually
+  # exist).
   config.vm.provision "shell", inline: <<SCRIPT
 cat > /etc/hosts <<EOF
 127.0.0.1 localhost
 192.168.10.10 node1.#{DOMAIN} node1
 192.168.10.11 node2.#{DOMAIN} node2
 192.168.10.12 node3.#{DOMAIN} node3
-192.168.10.12 hydra.public.#{DOMAIN}
+192.168.10.12 hydra.#{DOMAIN_PUBLIC}
 EOF
 SCRIPT