<% if !domainname.empty? %> domain  <%= has_variable?("domainname %") ? domainname : 'api.ingg.com' %> <% end -%>
<% if !searchpath.empty? %> search <%= searchpath.join(" ") %>
<% end -%>
<% nameservers.each do |ns| %>nameserver <%= ns %>
<% end -%>