only do a dbsync if on the database node

ceilometer should only try to reset the database if it's actually
on a node where there is a database.

Change-Id: Ibcfec0556829bff0938e3769c19d34ae6c02b738
diff --git a/lib/ceilometer b/lib/ceilometer
index 0be4184..2e6e7c5 100644
--- a/lib/ceilometer
+++ b/lib/ceilometer
@@ -180,9 +180,11 @@
     sudo chown $STACK_USER $CEILOMETER_AUTH_CACHE_DIR
     rm -f $CEILOMETER_AUTH_CACHE_DIR/*
 
-    if [ "$CEILOMETER_BACKEND" = 'mysql' ] || [ "$CEILOMETER_BACKEND" = 'postgresql' ] ; then
-        recreate_database ceilometer utf8
-        $CEILOMETER_BIN_DIR/ceilometer-dbsync
+    if is_service_enabled mysql postgresql; then
+        if [ "$CEILOMETER_BACKEND" = 'mysql' ] || [ "$CEILOMETER_BACKEND" = 'postgresql' ] ; then
+            recreate_database ceilometer utf8
+            $CEILOMETER_BIN_DIR/ceilometer-dbsync
+        fi
     fi
 }