OpenStack Wallaby : Configure Horizon2021/04/22

Configure OpenStack Dashboard Service (Horizon).
It's possible to control OpenStack on Web GUI to set Dashboard.

This example is based on the environment like follows.

        eth0|10.0.0.30 
+-----------+-----------+
|    [ Control Node ]   |
|                       |
|  MariaDB    RabbitMQ  |
|  Memcached  httpd     |
|  Keystone   Glance    |
|  Nova API   Horizon   |
+-----------------------+

[1]	Install Horizon.

# install from Wallaby, EPEL, PowerTools

[root@dlp ~(keystone)]#

dnf --enablerepo=centos-openstack-wallaby,powertools,epel -y install openstack-dashboard

[2]	Configure Horizon.

[root@dlp ~(keystone)]#

vi /etc/openstack-dashboard/local_settings

# line 39 : set Hosts you allow to access

# to specify wildcard ['*'], allow all

ALLOWED_HOSTS = ['

', ]

# line 94-99 : uncomment and specify Memcache server Host

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '10.0.0.30:11211',
    },
}

# line 105 : add

SESSION_ENGINE = "django.contrib.sessions.backends.cache"

# line 118 : set Openstack Host

# line 119 : comment out and add a line to specify URL of Keystone Host

OPENSTACK_HOST = "

10.0.0.30

OPENSTACK_KEYSTONE_URL = "http://%s:5000/v3" % OPENSTACK_HOST

OPENSTACK_KEYSTONE_URL = "http://10.0.0.30:5000/v3"

# line 123 : set your timezone

TIME_ZONE = "

Asia/Tokyo

# add to the end

WEBROOT = '/dashboard/'
LOGIN_URL = '/dashboard/auth/login/'
LOGOUT_URL = '/dashboard/auth/logout/'
LOGIN_REDIRECT_URL = '/dashboard/'
OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = True
OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = 'Default'

[root@dlp ~(keystone)]#

vi /etc/httpd/conf.d/openstack-dashboard.conf

# line 4 : add

WSGIDaemonProcess dashboard
WSGIProcessGroup dashboard
WSGISocketPrefix run/wsgi

WSGIApplicationGroup %{GLOBAL}

# line 6 : change

WSGIScriptAlias /dashboard

/usr/share/openstack-dashboard/openstack_dashboard/wsgi.py

# line 9 : change

<Directory

/usr/share/openstack-dashboard/openstack_dashboard

[root@dlp ~(keystone)]#

systemctl restart httpd

# if you allow common users to access to instances details or console on the Dashboard web, set like follows

[root@dlp ~(keystone)]#

vi /etc/nova/policy.json

{
  # add
  "os_compute_api:os-extended-server-attributes": "rule:admin_or_owner",
}

[root@dlp ~(keystone)]#

systemctl restart openstack-nova-api

[3]	If SELinux is enabled, change policy.

[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 any 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]	After login successfully, following screen is displayed (with common user). You can control Openstack on this Dashboard.

[7]

To confirm own instances, Click [Instances] on the left pane, then they are diplayed on the right pane.
If you did not configure Nova Policy like [2] above, common users can access to here only.
If you configured Nova Policy like [2] above, it's possible to confirm details of instance to click an instance name.

[8]	The details of an instance is displayed. To Click [Console] tab, it's possible to access to instance console.

[9]	On instance console, it's possible to operate instance on Dashboard web.

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