VTWO-14496: configure nodes with ansible instead of bash scripts

Vagrantfile

@@ -15,8 +15,6 @@ hosts = {
   workers: (1..2).map { |i| "worker-node-#{i}" }
 }
 
-generated_ansible_inventory_file="./inventory/generated"
-
 Vagrant.configure("2") do |config|
   config.vm.box = "debian/stretch64"
   config.vm.box_version = "= 9.9.1"
@@ -26,32 +24,40 @@ Vagrant.configure("2") do |config|
   # greet from every configured VM, revealing its hostname
   config.vm.provision "shell", inline: "echo Hello from \$HOSTNAME"
 
-  (hosts[:masters] + hosts[:workers]).each do |node_name|
-    config.vm.define node_name do |node|
-      node.vm.hostname = node_name
-      
-      node.vm.provider :virtualbox do |v|
-        v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
-        v.customize ["modifyvm", :id, "--memory", 512]
-        v.customize ["modifyvm", :id, "--name", node_name]
+  # complete the ansible inventory with groups
+  config.trigger.before :up do |trigger|
+    inventory = File.open("./inventory/generated", "w")
+    all_hosts = []
+
+    hosts.keys.each do |group_name| 
+      inventory.puts "[#{group_name}]"
+      hosts[group_name].each do |node_name|
+        inventory.puts node_name
+        all_hosts << node_name
       end
     end
-  
-  end
-  
-  config.trigger.after :up do |trigger|
-    File.open(generated_ansible_inventory_file, "w") do |w|
-      w.puts "[masters]"        
-      hosts[:masters].each { |host| w.puts host }
 
-      w.puts "[workers]"
-      hosts[:workers].each { |host| w.puts host }
+    inventory.puts "[k8s_nodes]"
+    all_hosts.each do |node_name|
+      inventory.puts node_name
     end
   end
-  
-  """
-  config.trigger.after :destroy do |trigger|
-    File.delete(generated_ansible_inventory_file) if File.exist?(generated_ansible_inventory_file)
+
+  # provision the vms
+  hosts.keys.each do |node_group| 
+    hosts[node_group].each do |node_name|
+
+      config.vm.define node_name do |node|
+        node.vm.hostname = node_name
+        
+        node.vm.provider :virtualbox do |v|
+          v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
+          v.customize ["modifyvm", :id, "--memory", 512]
+          v.customize ["modifyvm", :id, "--name", node_name]
+        end
+      end
+      
+    end
   end
-  """
+
 end