Horizon – Dashboard on Controller Node

Install the packages (on controller node)

apt install -y openstack-dashboard

Update configurations – Edit /etc/openstack-dashboard/local_settings.py

# Replaced 127.0.0.1 with controller
OPENSTACK_HOST = "controller"

# ALLOWED_HOSTS : Not the one at the end of configuration file 
# under ubuntu section, but the one at the top for configuration 
# file

ALLOWED_HOSTS = 'controller.xxxxxxx.net'

# Replaced existing configuration
SESSION_ENGINE = 'django.contrib.sessions.backends.cache'

# Replaced 127.0.0.1 with controller
CACHES = {
    'default': {
    'BACKEND':     'django.core.cache.backends.memcached.MemcachedCache',
    'LOCATION': 'controller:11211',
    },
}

# Add
OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = True

# Add
OPENSTACK_API_VERSIONS = { 
    "identity": 3, 
    "image": 2, 
    "volume": 3, 
}

#Add
OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = "Default"

#Add
OPENSTACK_KEYSTONE_DEFAULT_ROLE = "user"

# Updated OPENSTACK_NEUTRON_NETWORK with following changes

'enable_ipv6': False
'enable_fip_topology_check': False

# Added the following to OPENSTACK_NEUTRON_NETWORK

'enable_lb': False
'enable_firewall': False
'enable_vpn': False

# Updated TIME_ZONE
TIME_ZONE = "Asia/Kolkata"

Restart apache