I found nova use "utcnow" to get time and write it to db. So the create_time of vm also show utc time rather than localtime. Is there any flag in nova.conf to let nova use localtime . -- 非淡薄无以明志，非宁静无以致远 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20120606/c5ce0fb6/attachment.html>