Allow puppetdb to be configure for masterless conf

Currently the module only allows PuppetDB to be configured in a
agent/master setup configuration, by configuring the master section of
the puppet.conf and applying on the routes for such a configuration.
This commit allows one to use this module to configure the main section of
the puppet.conf and applying the proper routes so the module can configure
nodes to use PuppetDB in a masterless setup.

Doc about puppet.conf configure in masterless way available here
https://docs.puppetlabs.com/puppetdb/2.2/connect_puppet_apply.html#manage-puppetconf

README.md

@@ -492,6 +492,10 @@ Puppet's config directory (defaults to `/etc/puppet`).
 
 Puppet's config file (defaults to `/etc/puppet/puppet.conf`).
 
+####`masterless`
+
+A boolean switch to enable or disable the masterless setup of PuppetDB.
+
 ####`puppetdb_version`
 
 The version of the `puppetdb` package that should be installed. You may specify an explicit version number, 'present', or 'latest' (defaults to 'present').

manifests/master/config.pp

@@ -12,6 +12,7 @@ class puppetdb::master::config (
     true    => $::puppetdb::disable_ssl,
     default => false,
   },
+  $masterless                  = $puppetdb::params::masterless,
   $puppetdb_soft_write_failure = false,
   $manage_routes               = true,
   $manage_storeconfigs         = true,
@@ -67,6 +68,7 @@ class puppetdb::master::config (
   if ($manage_routes) {
     class { 'puppetdb::master::routes':
       puppet_confdir => $puppet_confdir,
+      masterless     => $masterless,
       require        => $strict_validation ? {
         true    => Puppetdb_conn_validator['puppetdb_conn'],
         default => Package[$terminus_package],
@@ -80,6 +82,7 @@ class puppetdb::master::config (
   if ($manage_storeconfigs) {
     class { 'puppetdb::master::storeconfigs':
       puppet_conf => $puppet_conf,
+      masterless  => $masterless,
       require     => $strict_validation ? {
         true    => Puppetdb_conn_validator['puppetdb_conn'],
         default => Package[$terminus_package],
@@ -93,6 +96,7 @@ class puppetdb::master::config (
   if ($manage_report_processor) {
     class { 'puppetdb::master::report_processor':
       puppet_conf => $puppet_conf,
+      masterless  => $masterless,
       enable      => $enable_reports,
       require     => $strict_validation ? {
         true    => Puppetdb_conn_validator['puppetdb_conn'],

manifests/master/report_processor.pp

@@ -2,15 +2,23 @@
 # for more details.
 class puppetdb::master::report_processor (
   $puppet_conf = $puppetdb::params::puppet_conf,
+  $masterless  = $puppetdb::params::masterless,
   $enable      = false
 ) inherits puppetdb::params {
+
+  if $masterless {
+    $puppet_conf_section = 'main'
+  } else {
+    $puppet_conf_section = 'master'
+  }
+
   ini_subsetting { 'puppet.conf/reports/puppetdb':
     ensure               => $enable ? {
       true    => present,
       default => absent
     },
     path                 => $puppet_conf,
-    section              => 'master',
+    section              => $puppet_conf_section,
     setting              => 'reports',
     subsetting           => 'puppetdb',
     subsetting_separator => ',',

manifests/master/routes.pp

@@ -2,7 +2,8 @@
 # details.
 class puppetdb::master::routes (
   $puppet_confdir = $puppetdb::params::puppet_confdir,
-  $routes = {
+  $masterless     = $puppetdb::params::masterless,
+  $routes         = {
     'master' => {
       'facts' => {
         'terminus' => 'puppetdb',
@@ -12,6 +13,23 @@ class puppetdb::master::routes (
   }
 ) inherits puppetdb::params {
 
+  if $masterless {
+    $routes_real = {
+      'apply' => {
+        'catalog' => {
+          'terminus' => 'compiler',
+          'cache'    => 'puppetdb',
+        },
+        'facts'   => {
+          'terminus' => 'facter',
+          'cache'    => 'puppetdb_apply',
+        }
+      }
+    }
+  } else {
+    $routes_real = $routes
+  }
+
   # TODO: this will overwrite any existing routes.yaml;
   #  to handle this properly we should just be ensuring
   #  that the proper settings exist, but to do that we'd need

manifests/master/storeconfigs.pp

@@ -2,20 +2,27 @@
 # puppetdb as the storeconfigs backend. See README.md for more details.
 class puppetdb::master::storeconfigs (
   $puppet_conf = $puppetdb::params::puppet_conf,
+  $masterless  = $puppetdb::params::masterless,
 ) inherits puppetdb::params {
 
+  if $masterless {
+    $puppet_conf_section = 'main'
+  } else {
+    $puppet_conf_section = 'master'
+  }
+
   Ini_setting {
-    section => 'master',
+    section => $puppet_conf_section,
     path    => $puppet_conf,
     ensure  => present,
   }
 
-  ini_setting { 'puppet.conf/master/storeconfigs':
+  ini_setting { "puppet.conf/${puppet_conf_section}/storeconfigs":
     setting => 'storeconfigs',
     value   => true,
   }
 
-  ini_setting { 'puppet.conf/master/storeconfigs_backend':
+  ini_setting { "puppet.conf/${puppet_conf_section}/storeconfigs_backend":
     setting => 'storeconfigs_backend',
     value   => 'puppetdb',
   }

manifests/params.pp

@@ -64,6 +64,7 @@ class puppetdb::params {
   $puppetdb_group       = 'puppetdb'
   $confdir              = '/etc/puppetdb/conf.d'
   $puppet_confdir       = '/etc/puppet'
+  $masterless           = false
   $terminus_package     = 'puppetdb-terminus'
   $ssl_dir              = '/etc/puppetdb/ssl'
 

templates/routes.yaml.erb

@@ -1,3 +1,3 @@
 # This file was automatically generated by the puppetdb module.
 
-<%= @routes.to_yaml %>
+<%= @routes_real.to_yaml %>