feat: setup metrics agents

- set puppet::puppetdb_api class to export puppetdb
- set infra::dns::server class to export bind
- set all to export node and systemd metrics

site/profiles/manifests/base.pp

@@ -29,6 +29,7 @@ class profiles::base (
   include profiles::base::hosts
   include profiles::accounts::sysadmin
   include profiles::ntp::client
+  include profiles::metrics::default
 
   # configure dns records for client
   profiles::dns::client {"${facts['networking']['fqdn']}-default":}

site/profiles/manifests/dns/server.pp

@@ -17,11 +17,15 @@ class profiles::dns::server (
 
   # setup base bind server
   class { 'bind':
-      forwarders => $use_forwarders,
-      dnssec     => $dnssec,
-      version    => 'Controlled by Puppet',
+      forwarders      => $use_forwarders,
+      dnssec          => $dnssec,
+      version         => 'Controlled by Puppet',
+      statistics_port => '8053',
   }
 
+  # setup bind_exporter
+  include prometheus::bind_exporter
+
   # if keys, import them
   $keys.each | $name, $data | {
     bind::key { $name:

site/profiles/manifests/metrics/default.pp

@@ -0,0 +1,11 @@
+# profiles::metrics::default
+#
+# these exporters will be setup on all nodes
+class profiles::metrics::default (
+  Boolean $node_exporter      = true,
+  Boolean $systemd_exporter   = true,
+) {
+
+  include prometheus::node_exporter
+  include prometheus::systemd_exporter
+}

site/profiles/manifests/puppet/puppetdb_api.pp

@@ -13,4 +13,9 @@ class profiles::puppet::puppetdb_api (
 
   contain ::puppetdb::server
 
+  class { 'prometheus::puppetdb_exporter':
+    puppetdb_url      => "http://${listen_address}:8080/pdb/query",
+    export_scrape_job => true,
+  }
+
 }