lxc-config/hooks/templates/rdns-zone.erb

@ IN SOA ns1.evenet.dn42. <%= data["zone"]["hostmaster"] %>. (
                    <%= data["zone"]["serial"] %> ; serial
                    <%= data["zone"]["refresh"] %> ; refresh
                    <%= data["zone"]["retry"] %> ; retry
                    <%= data["zone"]["expire"] %> ; expire
                    <%= data["zone"]["minimum"] %>) ; minimum
<% data["zone"]["ns"].each do |name, value| -%>
  NS <%= name %>.
<% end -%>

<% zone.pointers do |name, addr| -%>
<%= addr %> PTR <%= fqdn(name) %>.<%= domain %>.
<% end -%>