Thanks Chric and Sean, I run unstack.sh, remove the files in /etc/apache2/sites-enabled and /etc/apaceh2/sites-available, and rerun stack.sh, that works for me! Although I'm still run master branch of devstack on Ubuntu 16.04, as Sean say, I may move to Ubuntu 18.04 later. Thank you! Best Regards, Guannan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20190711/3102eb78/attachment.html>