feat: manage pgsql settings for puppetdb

- deep merge postgresql_config_entries in common.yaml
- add postgresql_config_entries into a new hieradata/roles/infra/puppetdb/sql.yaml
- set puppetdb role to import the options

hieradata/common.yaml

@@ -96,6 +96,9 @@ lookup_options:
   profiles::base::hosts::additional_hosts:
     merge:
       strategy: deep
+  postgresql_config_entries:
+    merge:
+      strategy: deep
 
 facts_path: '/opt/puppetlabs/facter/facts.d'
 

hieradata/roles/infra/puppetdb/sql.yaml

@@ -0,0 +1,4 @@
+---
+postgresql_config_entries:
+  max_connections: 300
+  shared_buffers: '256MB'

site/profiles/manifests/puppet/puppetdb_sql.pp

@@ -24,4 +24,12 @@ class profiles::puppet::puppetdb_sql (
 
   contain ::puppetdb::database::postgresql
 
+  # create the postgresql::server::config_entry resources
+  $pg_config_entries = lookup('postgresql_config_entries', Hash[String, Data], 'hash', {})
+  $pg_config_entries.each |String $key, Data $value| {
+    postgresql::server::config_entry { $key:
+      ensure => 'present',
+      value  => $value,
+    }
+  }
 }