Creation of glance::db::sync

In order to standardize the way dbsync are run across our modules,
we create a new class glance::db::sync.
This class will be included if sync_db is enabled.

By making this transition the glance::db::sync class
can be returned by the ENC.

A use case would be in an highly available environment, with 3 galera
nodes, include glance::registry on every node with sync_db set to false
and have the ENC return glance::db::sync just for one node.

Change-Id: I16c8bc411bd34f720513a5d4c94e82b07105af20

manifests/api.pp

@@ -255,9 +255,6 @@ class glance::api(
 
   # adding all of this stuff b/c it devstack says glance-api uses the
   # db now
-  Glance_api_config<||>   ~> Exec<| title == 'glance-manage db_sync' |>
-  Glance_cache_config<||> ~> Exec<| title == 'glance-manage db_sync' |>
-  Exec<| title == 'glance-manage db_sync' |> ~> Service['glance-api']
   Glance_api_config<||>   ~> Service['glance-api']
   Glance_cache_config<||> ~> Service['glance-api']
   Class['glance::policy'] ~> Service['glance-api']

manifests/db/sync.pp

@@ -0,0 +1,23 @@
+#
+# Class to execute glance dbsync
+#
+class glance::db::sync {
+
+  include ::glance::params
+
+  Package<| tag == 'glance-package' |> ~> Exec['glance-manage db_sync']
+  Exec['glance-manage db_sync'] ~> Service<| tag == 'glance-service' |>
+
+  Glance_registry_config<||> ~> Exec['glance-manage db_sync']
+  Glance_api_config<||> ~> Exec['glance-manage db_sync']
+  Glance_cache_config<||> ~> Exec['glance-manage db_sync']
+
+  exec { 'glance-manage db_sync':
+    command     => $::glance::params::db_sync_command,
+    path        => '/usr/bin',
+    user        => 'glance',
+    refreshonly => true,
+    logoutput   => on_failure,
+  }
+
+}

manifests/registry.pp

@@ -180,7 +180,6 @@ class glance::registry(
   Package[$glance::params::registry_package_name] -> File['/etc/glance/']
   Package[$glance::params::registry_package_name] -> Glance_registry_config<||>
 
-  Glance_registry_config<||> ~> Exec<| title == 'glance-manage db_sync' |>
   Glance_registry_config<||> ~> Service['glance-registry']
 
   File {
@@ -364,16 +363,7 @@ class glance::registry(
   }
 
   if $sync_db {
-    Exec['glance-manage db_sync'] ~> Service['glance-registry']
-
-    exec { 'glance-manage db_sync':
-      command     => $::glance::params::db_sync_command,
-      path        => '/usr/bin',
-      user        => 'glance',
-      refreshonly => true,
-      logoutput   => on_failure,
-      subscribe   => [Package[$glance::params::registry_package_name], File['/etc/glance/glance-registry.conf']],
-    }
+    include ::glance::db::sync
   }
 
   if $manage_service {

spec/classes/glance_db_sync_spec.rb

@@ -0,0 +1,44 @@
+require 'spec_helper'
+
+describe 'glance::db::sync' do
+
+  shared_examples_for 'glance-dbsync' do
+
+    it 'runs glance-manage db_sync' do
+      is_expected.to contain_exec('glance-manage db_sync').with(
+        :command     => 'glance-manage --config-file=/etc/glance/glance-registry.conf db_sync',
+        :path        => '/usr/bin',
+        :user        => 'glance',
+        :refreshonly => 'true',
+        :logoutput   => 'on_failure'
+      )
+    end
+
+  end
+
+  context 'on a RedHat osfamily' do
+    let :facts do
+      {
+        :osfamily                 => 'RedHat',
+        :operatingsystemrelease   => '7.0',
+        :concat_basedir => '/var/lib/puppet/concat'
+      }
+    end
+
+    it_configures 'glance-dbsync'
+  end
+
+  context 'on a Debian osfamily' do
+    let :facts do
+      {
+        :operatingsystemrelease => '7.8',
+        :operatingsystem        => 'Debian',
+        :osfamily               => 'Debian',
+        :concat_basedir => '/var/lib/puppet/concat'
+      }
+    end
+
+    it_configures 'glance-dbsync'
+  end
+
+end

spec/classes/glance_registry_spec.rb

@@ -78,19 +78,6 @@ describe 'glance::registry' do
           'tag'        => 'glance-service',
       )}
 
-      it 'is_expected.to only sync the db if sync_db is enabled' do
-
-        if param_hash[:sync_db]
-          is_expected.to contain_exec('glance-manage db_sync').with(
-            'path'        => '/usr/bin',
-            'command'     => 'glance-manage --config-file=/etc/glance/glance-registry.conf db_sync',
-            'refreshonly' => true,
-            'logoutput'   => 'on_failure',
-            'subscribe'   => ['Package[glance-registry]', 'File[/etc/glance/glance-registry.conf]'],
-            'notify'      => ["Service[glance-registry]"]
-          )
-        end
-      end
       it 'is_expected.to not sync the db if sync_db is set to false' do
 
         if !param_hash[:sync_db]