清漆厨师食谱主任erb文件

Question

如何更改erb文件以将前五个节点添加到director director1，将其他节点添加到director2

My current erb file. 
director director1 round-robin {
<%- if !(node['varnish']['backend_servers']).nil? -%>
  <%- node['varnish']['backend_servers'].each do |server| -%>
    { .backend = <%= server[:hostname] %>; }
  <%- end %>
<%- end %>
}