Add “log_dir” parameter

manifests/init.pp

@@ -64,6 +64,7 @@ class ceilometer(
     'DEFAULT/rabbit_virtualhost' : value => $rabbit_virtualhost;
     'DEFAULT/debug'              : value => $debug;
     'DEFAULT/verbose'            : value => $verbose;
+    'DEFAULT/log_dir'            : value => $::ceilometer::params::log_dir;
   }
 
 }

manifests/params.pp

@@ -17,6 +17,8 @@ class ceilometer::params {
   $dbsync_command             =
     'ceilometer-dbsync --config-file=/etc/ceilometer/ceilometer.conf'
 
+  $log_dir                    = '/var/log/ceilometer'
+
   $username                   = 'ceilometer'
   $groupname                  = 'ceilometer'
 }