Parameterize the node exporter promfile directory owner

Puppetserver needs puppet to own this directory.

manifests/profile/prometheus/exporter/node.pp

@@ -24,6 +24,7 @@
   Optional[String] $version = undef,
   Array $covered_datacenters = [],
   String $default_datacenter = 'default',
+  String $promfile_owner = 'prometheus',
 ) {
   $log_file = '/var/log/prometheus-node-exporter.log'
 
@@ -90,7 +91,7 @@
   file { '/var/lib/prometheus/node-exporter':
     ensure => 'directory',
     mode   => '2775',
-    owner  => 'prometheus',
+    owner  => $promfile_owner,
     group  => 'prometheus',
   }
 

spec/classes/profile/prometheus/exporter/node_spec.rb

@@ -79,6 +79,13 @@
           .that_requires('File[/var/lib/prometheus]')
       end
 
+      context 'with promfile_owner set to brlglph' do
+        let(:params) { { promfile_owner: 'brlglph' } }
+
+        it { is_expected.to contain_file('/var/lib/prometheus/node-exporter').with_owner('brlglph') }
+        it { is_expected.to contain_file('/var/lib/prometheus/node-exporter').with_group('prometheus') }
+      end
+
       it do
         is_expected.to contain_file('/var/lib/prometheus')
           .with_ensure('directory')