zone "<%= zone %>" {
    type master;
    <% if zone.match(/\//) %>
    file "<%= zonedir %>/db.<%= zone.sub(/\//, '-') %>";
    <% else %>
    file "<%= zonedir %>/db.<%= zone %>";
    <% end -%>
    allow-transfer {
    <% slaves.each_pair do |k, v| -%>
        <%= v['ip'] %>;
    <% end -%>
    };
    allow-update { none; };
};