Ensure asg name is defined

Author: Luke Addison

puppet/modules/kubernetes_addons/manifests/cluster_autoscaler.pp

@@ -21,10 +21,10 @@
     $rbac_enabled = false
   }
 
-  if defined('$kubernetes::cluster_name') {
+  if defined('$kubernetes::cluster_name') and $instance_pool_name != '' {
     $asg_name="${::kubernetes::cluster_name}-kubernetes-${instance_pool_name}"
   } else {
-    $asg_name=undef
+    fail('asg name must be set')
   }
 
   if $version == '' {

puppet/modules/kubernetes_addons/templates/cluster-autoscaler-deployment.yaml.erb

@@ -64,6 +64,7 @@ spec:
         - --cloud-provider=<%= @cloud_provider %>
         - --skip-nodes-with-local-storage=false
         - --nodes=<%= @min_instances %>:<%= @max_instances %>:<%= @asg_name %>
+        - --skip-nodes-with-system-pods=false
 <% if @balance_similar_node_groups -%>
         - --balance-similar-node-groups
 <% end -%>