I install the devstack success, and get the bellow logs :

 This is your host IP address: 45.117.40.190
This is your host IPv6 address: ::1
Horizon is now available at http://45.117.40.190/dashboard
Keystone is serving at http://45.117.40.190/identity/
The default users are: admin and demo
The password: devops

WARNING: 
Using lib/neutron-legacy is deprecated, and it will be removed in the future


Services are running under systemd unit files.
For more information see: 
https://docs.openstack.org/devstack/latest/systemd.html

DevStack Version: pike
Change: b93fd6fc5c8d9ab23251c45b427ccad4caeb79e1 Merge "Updated from generate-devstack-plugins-list" 2017-08-17 07:40:15 +0000
OS Version: CentOS 7.2.1511 Core

2017-08-20 19:19:54.281 | stack.sh completed in 1812 seconds.

but I can not access the http://45.117.40.190/dashboard in the browser.