[原]openstack-kilo--issue(十九) ImportError: Could not import settings 'openstack_dashboard.settings' (Is it on sys.path? Is there an import error in the settings file?): No module named main

查看此问题的时候请先查看 这个问题包含在（十）中，此篇只是从（十）中分离出来

openstack-kilo--issue(十)ERROR: openstack Unable to establish connection to http://controller:35357/v3/auth/tokens

==========================      如果遇到下面这样的问题   请参考上面的网址的问题二的解决方案    ====================================

ImportError: Could not import settings 'openstack_dashboard.settings' (Is it on sys.path? Is there an import error in the settings file?): No module named main

 1 [root@controller system]# systemctl status httpd.service
 2 httpd.service - The Apache HTTP Server
 3    Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled)
 4   Drop-In: /usr/lib/systemd/system/httpd.service.d
 5            └─openstack-dashboard.conf
 6    Active: failed (Result: exit-code) since Tue 2016-12-27 15:37:33 CST; 15min ago
 7   Process: 8204 ExecStartPre=/usr/bin/python /usr/share/openstack-dashboard/manage.py collectstatic --noinput --clear (code=e
 8 
 9 Dec 27 15:37:33 controller python[8204]: File "/usr/lib/python2.7/site-packages/django/conf/__init__.py", line 54, in __getat
10 Dec 27 15:37:33 controller python[8204]: self._setup(name)
11 Dec 27 15:37:33 controller python[8204]: File "/usr/lib/python2.7/site-packages/django/conf/__init__.py", line 49, in _setup
12 Dec 27 15:37:33 controller python[8204]: self._wrapped = Settings(settings_module)
13 Dec 27 15:37:33 controller python[8204]: File "/usr/lib/python2.7/site-packages/django/conf/__init__.py", line 132, in __init
14 Dec 27 15:37:33 controller python[8204]: % (self.SETTINGS_MODULE, e)
15 Dec 27 15:37:33 controller python[8204]: ImportError: Could not import settings 'openstack_dashboard.settings' (Is it on sys.
16 Dec 27 15:37:33 controller systemd[1]: httpd.service: control process exited, code=exited status=1
17 Dec 27 15:37:33 controller systemd[1]: Failed to start The Apache HTTP Server.
18 Dec 27 15:37:33 controller systemd[1]: Unit httpd.service entered failed state.

openstack-dashboard也出现了变化

[root@controller httpd.service.d]# openstack-status 
== Nova services ==
openstack-nova-api:                     active
openstack-nova-cert:                    active
openstack-nova-compute:                 active
openstack-nova-network:                 inactive  (disabled on boot)
openstack-nova-scheduler:               active
openstack-nova-conductor:               active
== Glance services ==
openstack-glance-api:                   active
openstack-glance-registry:              active
== Keystone service ==
openstack-keystone:                     active
== Horizon service ==
openstack-dashboard:                    uncontactable
== neutron services ==
neutron-server:                         active