Allow customization of db sync command line

Add parameter to nova::db::sync class to allow end
users to add command line parameters to the db sync command.

Change-Id: I89dea475495d5903d953ff4492ad2e0f12a293c1
Partial-bug: #1472740

manifests/db/sync.pp

@@ -1,7 +1,17 @@
 #
 # Class to execute nova dbsync
 #
-class nova::db::sync {
+# ==Parameters
+#
+# [*extra_params*]
+#   (optional) String of extra command line parameters to append
+#   to the nova-manage db sync command. These will be inserted in
+#   the command line between 'nova-manage' and 'db sync'.
+#   Defaults to undef
+#
+class nova::db::sync(
+  $extra_params = undef,
+) {
 
   include ::nova::params
 
@@ -14,7 +24,7 @@ class nova::db::sync {
   Exec<| title == 'post-nova_config' |> ~> Exec['nova-db-sync']
 
   exec { 'nova-db-sync':
-    command     => '/usr/bin/nova-manage db sync',
+    command     => "/usr/bin/nova-manage ${extra_params} db sync",
     refreshonly => true,
     logoutput   => on_failure,
   }

spec/classes/nova_db_sync_spec.rb

@@ -6,14 +6,31 @@ describe 'nova::db::sync' do
 
     it 'runs nova-db-sync' do
       is_expected.to contain_exec('nova-db-sync').with(
-        :command     => '/usr/bin/nova-manage db sync',
+        :command     => '/usr/bin/nova-manage  db sync',
         :refreshonly => 'true',
         :logoutput   => 'on_failure'
       )
     end
 
+    describe "overriding extra_params" do
+      let :params do
+        {
+          :extra_params => '--config-file /etc/nova/nova.conf',
+        }
+      end
+
+      it {
+        is_expected.to contain_exec('nova-db-sync').with(
+          :command     => '/usr/bin/nova-manage --config-file /etc/nova/nova.conf db sync',
+          :refreshonly => 'true',
+          :logoutput   => 'on_failure'
+        )
+        }
+      end
+
   end
 
+
   context 'on a RedHat osfamily' do
     let :facts do
       {