Ubuntu 20.04
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OpenStack Victoria : Configure Horizon
Configure OpenStack Dashboard Service (Horizon). It's possible to control OpenStack on Web GUI to set Dashboard.
[1] Install Horizon.
root@dlp ~(keystone)#
apt -y install openstack-dashboard
[2] Configure Horizon.
root@dlp ~(keystone)#
vi /etc/openstack-dashboard/local_settings.py
# line 99: change Memcache server

    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '',

# line 113: add

SESSION_ENGINE = "django.contrib.sessions.backends.cache"
# line 126: set Openstack Host

# line 127: comment out and add a line to specify URL of Keystone Host

# line 131: set your timezone

# add to the end


root@dlp ~(keystone)#
systemctl restart apache2
# this is optional setting

# 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
# create new

# default is [rule:system_admin_api], so only admin users can access

  "os_compute_api:os-extended-server-attributes": "rule:admin_or_owner",

root@dlp ~(keystone)#
chgrp nova /etc/nova/policy.json

root@dlp ~(keystone)#
chmod 640 /etc/nova/policy.json

root@dlp ~(keystone)#
systemctl restart nova-api
Access to the URL below with any web browser.
⇒ http://(Dashboard server's hostname or IP address)/horizon/
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.
[4] After login successfully, following screen is displayed (with common user). You can control Openstack on this Dashboard.
[5] To confirm own instances, Click [Instances] on the left pane, then they are diplayed on the right.
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.
[6] The details of an instance is displayed. To Click [Console] tab, it's possible to access to instance console.
[7] On instance console, it's possible to operate instance on Dashboard web.
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