CentOS 7
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OpenStack Queens : Configure Horizon
2018/03/06
 
Configure OpenStack Dashboard Service (Horizon).
It's possible to control OpenStack on Web GUI to set Dashboard.
This example is based on the emvironment like follows. 
                  eth0|10.0.0.30 
          +-----------+-----------+
          |    [ Control Node ]   |
          |                       |
          |  MariaDB    RabbitMQ  |
          |  Memcached  httpd     |
          |  Keystone   Glance    |
          |  Nova API   Horizon   |
          +-----------------------+
[1] Install Horizon.
# install from Queens, EPEL

[root@dlp ~(keystone)]#
yum --enablerepo=centos-openstack-queens,epel -y install openstack-dashboard
[2] Configure Horizon.
[root@dlp ~(keystone)]#
vi /etc/openstack-dashboard/local_settings
# line 38: add Dashboard Host

ALLOWED_HOSTS = ['
dlp.srv.world
', 'localhost']
# line 64: uncomment like follows

OPENSTACK_API_VERSIONS = {
#    "data-processing": 1.1,
    "identity": 3,
    "volume": 2,
    "compute": 2,
}
# line 75: uncomment and change

OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT =
True
# line 97: uncomment

OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = 'Default'
# line 167,168: change and add Memcache server

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '10.0.0.30:11211',
    },
}
# line 189: change OPENSTACK_HOST to your own one

OPENSTACK_HOST = "
10.0.0.30
"
OPENSTACK_KEYSTONE_URL = "http://%s:5000/v3" % OPENSTACK_HOST
OPENSTACK_KEYSTONE_DEFAULT_ROLE = "_member_"
[root@dlp ~(keystone)]#
vi /etc/httpd/conf.d/openstack-dashboard.conf
# near line 4: add

WSGIDaemonProcess dashboard
WSGIProcessGroup dashboard
WSGISocketPrefix run/wsgi
WSGIApplicationGroup %{GLOBAL}
[root@dlp ~(keystone)]#
systemctl restart httpd

[3] If SELinux is enabled, change boolean settings.
[root@dlp ~(keystone)]#
setsebool -P httpd_can_network_connect on

[4] If Firewalld is running, allow services.
[root@dlp ~(keystone)]#
firewall-cmd --add-service={http,https} --permanent

success
[root@dlp ~(keystone)]#
firewall-cmd --reload

success
[5]
Access to the URL below with web browser.
⇒ http://(server's hostname or IP address)/dashboard/
After accessing, following screen is displayed, then you can login with a user in Keystone.
It's possible to use all features if you login with admin user when you set it on keystone bootstrap. If you login with a common user, it's possible to use or manage own instances.
[6] If it's OK to login normally, following screen is displayed (with common user). You can control Openstack on this Dashboard.
[7] To access an instance, Click [Instances] on the left menu. Then, instances' list is shown on the right, next Click the name of instance you'd like to access.
[8] The description of instance is shown, next, Click [Console] tab.
[9] The console of instance is shown. You can operate instances on here.
 
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