<% node.interfaces do |interface| -%>
chef_network_interface{name="<%= interface[:interface] %>",role="<%= interface[:role].to_s %>",family="<%= interface[:family].to_s %>"} 1
<% end -%>
+# HELP chef_role Information about chef roles
+# TYPE chef_role gauge
+<% node[:roles].sort.each do |role| -%>
+chef_role{name="<%= role %>"} 1
+<% end -%>
+<% node[:prometheus][:metrics].sort.each do |name, details| -%>
+# HELP <%= name %> <%= details[:help] %>
+# TYPE <%= name %> gauge
+<%= name %>{<%= Hash(details[:labels]).map { |k,v| "#{k}=\"#{v}\"" }.join(",") %>} <%= details[:metric] || 1 %>
+<% end -%>