Enable resolved prometheus exporter

Author: tomhughes

cookbooks/networking/metadata.rb

@@ -6,3 +6,4 @@
 
 version           "1.0.0"
 depends           "chef"
+depends           "ruby"

cookbooks/networking/recipes/default.rb

@@ -23,6 +23,8 @@
 require "ipaddr"
 require "yaml"
 
+include_recipe "ruby"
+
 keys = data_bag_item("networking", "keys")
 
 file "/etc/netplan/00-installer-config.yaml" do
@@ -331,6 +333,16 @@
   to "../run/systemd/resolve/stub-resolv.conf"
 end
 
+gem_package "dbus-systemd" do
+  gem_binary node[:ruby][:gem]
+end
+
+prometheus_exporter "resolved" do
+  port 10028
+  user "systemd-resolve"
+  restrict_address_families "AF_UNIX"
+end
+
 hosts = { :inet => [], :inet6 => [] }
 
 search(:node, "networking:interfaces").collect do |n|